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authorJeffrey H. Kingston <jeff@it.usyd.edu.au>2010-09-14 20:36:01 +0000
committerJeffrey H. Kingston <jeff@it.usyd.edu.au>2010-09-14 20:36:01 +0000
commit2f4268e5e02216be53cd85816362191373512463 (patch)
tree57165bf2889337044bc3633854e5aa38f7d89e6b /doc
parent73d840b9f14b65166b92e6b43f930fd0ef7b8267 (diff)
downloadlout-2f4268e5e02216be53cd85816362191373512463.tar.gz
Lout 3.20.
git-svn-id: http://svn.savannah.nongnu.org/svn/lout/trunk@9 9365b830-b601-4143-9ba8-b4a8e2c3339c
Diffstat (limited to 'doc')
-rw-r--r--doc/README2
-rw-r--r--doc/design/README2
-rw-r--r--doc/design/outfile.ps11703
-rw-r--r--doc/expert/README2
-rw-r--r--doc/expert/all4
-rw-r--r--doc/expert/exa_bibl4
-rw-r--r--doc/expert/outfile.ps16122
-rw-r--r--doc/expert/preface2
-rw-r--r--doc/slides/README2
-rw-r--r--doc/slides/all2
-rw-r--r--doc/slides/outfile.ps4473
-rw-r--r--doc/user/README2
-rw-r--r--doc/user/all7
-rw-r--r--doc/user/cpp_chan91
-rw-r--r--doc/user/preface2
-rw-r--r--doc/user/prg (renamed from doc/user/cpp)43
-rw-r--r--doc/user/prg_chan108
-rw-r--r--doc/user/prg_comm (renamed from doc/user/cpp_comm)2
-rw-r--r--doc/user/prg_embe (renamed from doc/user/cpp_embe)7
-rw-r--r--doc/user/prg_erro (renamed from doc/user/cpp_erro)2
-rw-r--r--doc/user/prg_lone (renamed from doc/user/cpp_lone)5
-rw-r--r--doc/user/prg_opti (renamed from doc/user/cpp_opti)42
-rw-r--r--doc/user/prg_perl108
-rw-r--r--doc/user/prg_pipe (renamed from doc/user/cpp_pipe)0
-rw-r--r--doc/user/prg_prog (renamed from doc/user/cpp_prog)2
-rw-r--r--doc/user/prg_tabs (renamed from doc/user/cpp_tabs)0
-rw-r--r--doc/user/user.ps5202
-rw-r--r--doc/user/vcpp1
-rw-r--r--doc/user/vprg1
29 files changed, 37793 insertions, 150 deletions
diff --git a/doc/README b/doc/README
index 62f2260..791ceb2 100644
--- a/doc/README
+++ b/doc/README
@@ -15,4 +15,4 @@ slides A Practical Introduction to the Lout Document Formatting
user A User's Guide to the Lout Document Formatting System
Jeffrey H. Kingston
-17 November 1997
+8 April 2000
diff --git a/doc/design/README b/doc/design/README
index 1e7a8af..87c660d 100644
--- a/doc/design/README
+++ b/doc/design/README
@@ -22,4 +22,4 @@ messages (although changing the paper size might
produce one or two benign ones).
Jeffrey H. Kingston
-17 September 1999
+8 April 2000
diff --git a/doc/design/outfile.ps b/doc/design/outfile.ps
new file mode 100644
index 0000000..904d913
--- /dev/null
+++ b/doc/design/outfile.ps
@@ -0,0 +1,11703 @@
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+%%CreationDate: Sat Apr 8 14:53:13 2000
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+% @PrependGraphic file /export/home/6monthspace/jeff/lout.lib/include/tabf.lpg
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+% %
+% To assist in avoiding name clashes, the names %
+% of all these symbols begin with "ltab". %
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+% 24 September 1991 %
+% 22 December 1992 %
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+} def
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+ dup lfigdict exch known
+ { lfigdict exch get }
+ { 30 string cvs } ifelse
+ show
+ ( Command: ) show
+ $error /command get 30 string cvs show
+ } stopped {} if
+ showpage stop
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+{ 2 copy length exch length add string
+ dup 0 4 index putinterval
+ dup 3 index length 3 index putinterval
+ 3 1 roll pop pop
+} def
+
+% <string> lfigdebugprint -
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+% count copy
+% count 2 idiv
+% { ==
+% (\n) print
+% } repeat
+% (\n) print
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+/syntaxerror (syntaxerror error: syntax error in text of figure?) def
+/typecheck (typecheck error: syntax error in text of figure?) def
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+/VMError (VMError error: run out of memory?) def
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+
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+% min two points: <point> <point> lfigpmin <point>
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+
+% scalar multiplication: <point> <num> lfigpmul <point>
+/lfigpmul { dup 3 1 roll mul 3 1 roll mul exch } def
+
+% point at angle and distance: <point> <length> <angle> lfigatangle <point>
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+
+% angle from one point to another: <point> <point> lfigangle <angle>
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+% distance between two points: <point> <point> lfigdistance <length>
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+
+% difference in x coords: <point> <point> lfigxdistance <length>
+/lfigxdistance { pop 3 1 roll pop sub } def
+
+%difference in y coords: <point> <point> lfigydistance <length>
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+
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+{ pop pop [] 0 setdash stroke
+} def
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+{ 2 copy div 2 le 1 index 0 le or
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+
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+{ pop pop
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+% painting (i.e. filling): - lfigwhite - (etc.)
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+/lfigwhite { 1.0 1.0 1.0 setrgbcolor fill } def
+
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+
+% shape and labels of the @Box symbol
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+ xsize 0 /SE lfigpointdef
+ xsize ysize /NE lfigpointdef
+ 0 ysize /NW lfigpointdef
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+ NW 0.5 lfigpmul /W lfigpointdef
+ W SE lfigpadd /E lfigpointdef
+ S NW lfigpadd /N lfigpointdef
+ NE 0.5 lfigpmul /CTR lfigpointdef
+ [ CTR NE lfigpsub /lfigboxcircum cvx ] lfigcircumdef
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+} def
+
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+{
+
+ xsize 0.5 mul ysize 0.5 mul /CTR lfigpointdef
+ xsize 0.5 mul 0 /S lfigpointdef
+ xsize ysize 0.5 mul /E lfigpointdef
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+
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+ [ xmark ysize xmark sub ]
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+ [ xmark xmark ]
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+} def
+
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+{ xmark 2 mul 0 moveto xsize 0 lineto
+ xsize ysize xmark 2 mul sub lineto
+ xsize xmark sub ysize xmark 2 mul sub lineto
+ xsize xmark sub xmark lineto
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+} def
+
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+{
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+ CTR xsize xsize ysize ysize lfigpmax 0.5 lfigpmul lfigpadd /NE lfigpointdef
+ CTR 0 0 CTR NE lfigdistance 135 lfigatangle lfigpadd /NW lfigpointdef
+ CTR 0 0 CTR NE lfigdistance 225 lfigatangle lfigpadd /SW lfigpointdef
+ CTR 0 0 CTR NE lfigdistance 315 lfigatangle lfigpadd /SE lfigpointdef
+ SW 0.5 lfigpmul SE 0.5 lfigpmul lfigpadd /S lfigpointdef
+ NW 0.5 lfigpmul NE 0.5 lfigpmul lfigpadd /N lfigpointdef
+ SW 0.5 lfigpmul NW 0.5 lfigpmul lfigpadd /W lfigpointdef
+ SE 0.5 lfigpmul NE 0.5 lfigpmul lfigpadd /E lfigpointdef
+ [ CTR NE lfigpsub /lfigboxcircum cvx ] lfigcircumdef
+ SW SE NE NW SW
+} def
+
+% shape and labels of the @Diamond symbol
+/lfigdiamond
+{
+ xsize 0 0.5 lfigpmul /S lfigpointdef
+ 0 ysize 0.5 lfigpmul /W lfigpointdef
+ S W lfigpadd /CTR lfigpointdef
+ CTR W lfigpadd /N lfigpointdef
+ CTR S lfigpadd /E lfigpointdef
+ [ xsize ysize 0.5 lfigpmul /lfigdiamondcircum cvx ] lfigcircumdef
+ S E N W S
+} def
+
+% shape and labels of the @Ellipse symbol
+/lfigellipse
+{
+ xsize 0 0.5 lfigpmul /S lfigpointdef
+ 0 ysize 0.5 lfigpmul /W lfigpointdef
+ S W lfigpadd /CTR lfigpointdef
+ CTR W lfigpadd /N lfigpointdef
+ CTR S lfigpadd /E lfigpointdef
+ CTR xsize 0 0.3536 lfigpmul lfigpadd 0 ysize 0.3536 lfigpmul lfigpadd /NE lfigpointdef
+ 0 ysize 0.3536 lfigpmul CTR xsize 0 0.3536 lfigpmul lfigpadd lfigpsub /SE lfigpointdef
+ xsize 0 0.3536 lfigpmul CTR lfigpsub 0 ysize 0.3536 lfigpmul lfigpadd /NW lfigpointdef
+ 0 ysize 0.3536 lfigpmul xsize 0 0.3536 lfigpmul CTR lfigpsub lfigpsub /SW lfigpointdef
+ [ xsize ysize 0.5 lfigpmul /lfigellipsecircum cvx ] lfigcircumdef
+ S [ CTR ] E [ CTR ] N [ CTR ] W [ CTR ] S
+} def
+
+% shape and labels of the @Circle symbol
+/lfigcircle
+{
+ xsize ysize 0.5 lfigpmul /CTR lfigpointdef
+ CTR xsize 0 ysize 0 lfigpmax 0.5 lfigpmul lfigpadd /E lfigpointdef
+ CTR 0 0 CTR E lfigdistance 45 lfigatangle lfigpadd /NE lfigpointdef
+ CTR 0 0 CTR E lfigdistance 90 lfigatangle lfigpadd /N lfigpointdef
+ CTR 0 0 CTR E lfigdistance 135 lfigatangle lfigpadd /NW lfigpointdef
+ CTR 0 0 CTR E lfigdistance 180 lfigatangle lfigpadd /W lfigpointdef
+ CTR 0 0 CTR E lfigdistance 225 lfigatangle lfigpadd /SW lfigpointdef
+ CTR 0 0 CTR E lfigdistance 270 lfigatangle lfigpadd /S lfigpointdef
+ CTR 0 0 CTR E lfigdistance 315 lfigatangle lfigpadd /SE lfigpointdef
+ [ S E lfigpsub /lfigellipsecircum cvx ] lfigcircumdef
+ S [ CTR ] E [ CTR ] N [ CTR ] W [ CTR ] S
+} def
+
+% shape and labels of the @HLine and @HArrow symbols
+/lfighline
+{
+ 0 ymark lfigprevious /FROM lfigpointdef
+ xsize ymark lfigprevious /TO lfigpointdef
+} def
+
+% shape and labels of the @VLine and @VArrow symbols
+/lfigvline
+{
+ xmark ysize lfigprevious /FROM lfigpointdef
+ xmark 0 lfigprevious /TO lfigpointdef
+} def
+
+% points of a polygon around base with given no of sides, vert init angle:
+% <sides> <angle> figpolygon <point> ... <point>
+/lfigpolygon
+{ xsize ysize 0.5 lfigpmul /CTR lfigpointdef
+ 90 sub CTR 2 copy lfigmax 5 3 roll
+ [ 4 copy pop /lfigpolycircum cvx ] lfigcircumdef
+ exch dup 360 exch div exch
+ 1 1 3 2 roll
+ { 4 string cvs (P) exch lfigconcat cvn
+ 6 copy pop pop lfigatangle 2 copy 10 2 roll
+ 3 2 roll lfigpointdef
+ dup 3 1 roll add exch
+ } for
+ pop lfigatangle
+} def
+
+% next array element: <array> <index> lfiggetnext <array> <index> <any> true
+% or <array> <index> false
+/lfiggetnext
+{ 2 copy exch length ge
+ { false }
+ { 2 copy get exch 1 add exch true } ifelse
+} def
+
+% check whether thing is number: <any> lfigisnumbertype <any> <bool>
+/lfigisnumbertype
+{ dup type dup
+ /integertype eq exch /realtype eq or
+} def
+
+% check whether thing is an array: <any> lfigisarraytype <any> <bool>
+/lfigisarraytype { dup type /arraytype eq } def
+
+% get next item: <array> <index> lfiggetnextitem <array> <index> 0
+% or <array> <index> <array> 1
+% or <array> <index> <point> 2
+/lfiggetnextitem
+{ lfiggetnext
+ { lfigisarraytype
+ { 1
+ }
+ { lfigisnumbertype
+ { 3 1 roll
+ lfiggetnext
+ { lfigisnumbertype
+ { 4 3 roll exch 2
+ }
+ { pop 3 2 roll pop 0
+ } ifelse
+ }
+ { 3 2 roll pop 0
+ } ifelse
+ }
+ { pop 0
+ } ifelse
+ } ifelse
+ }
+ { 0
+ } ifelse
+} def
+
+% set arc path: bool x1 y1 x2 y2 x0 y0 lfigsetarc <angle> <angle> <dist>
+% the path goes from x1 y1 to x2 y2 about centre x0 y0,
+% anticlockwise if bool is true else clockwise.
+% The orientations of backwards pointing and forwards pointing
+% arrowheads are returned in the two angles, and
+% the length of the arc is returned in <dist>.
+/lfigsetarc
+{
+ 20 dict begin
+ matrix currentmatrix 8 1 roll
+ 2 copy translate 2 copy 8 2 roll
+ 4 2 roll lfigpsub 6 2 roll lfigpsub
+ dup /y1 exch def dup mul /y1s exch def
+ dup /x1 exch def dup mul /x1s exch def
+ dup /y2 exch def dup mul /y2s exch def
+ dup /x2 exch def dup mul /x2s exch def
+
+ y1s y2s eq
+ { -1
+ }
+ { y1s x2s mul y2s x1s mul sub y1s y2s sub div
+ } ifelse
+ /da exch def
+
+ x1s x2s eq
+ { -1
+ }
+ { x1s y2s mul x2s y1s mul sub x1s x2s sub div
+ } ifelse
+ /db exch def
+
+ da 0 gt db 0 gt and
+ { /LMax da sqrt db sqrt lfigmax def
+ /scalex da sqrt LMax div def
+ /scaley db sqrt LMax div def
+ scalex scaley scale
+ 0 0 LMax
+ 0 0 x1 scalex mul y1 scaley mul lfigangle
+ 0 0 x2 scalex mul y2 scaley mul lfigangle
+ 2 copy eq { 360 add } if
+ 2 copy 8 2 roll
+ 5 index { arc } { arcn } ifelse
+ 2 index 1 index
+ { 90 sub } { 90 add } ifelse
+ dup sin scaley mul exch cos scalex mul atan
+ 2 index 2 index
+ { 90 add } { 90 sub } ifelse
+ dup sin scaley mul exch cos scalex mul atan
+ 5 2 roll % res1 res2 ang1 ang2 anticlockwise
+ { exch sub } { sub } ifelse
+ dup 0 le { 360 add } if lfigpi mul LMax mul 180 div
+ }
+ { 0 0 x1 y1 lfigdistance 0 0 x2 y2 lfigdistance eq
+ 0 0 x1 y1 lfigdistance 0 gt and
+ { 0 0
+ 0 0 x1 y1 lfigdistance
+ 0 0 x1 y1 lfigangle
+ 0 0 x2 y2 lfigangle
+ 2 copy eq { 360 add } if
+ 2 copy 8 2 roll
+ 5 index { arc } { arcn } ifelse
+ 2 index 1 index
+ { 90 sub } { 90 add } ifelse
+ 2 index 2 index
+ { 90 add } { 90 sub } ifelse
+ 5 2 roll % res1 res2 ang1 ang2 clockwise
+ { exch sub } { sub } ifelse
+ dup 0 le { 360 add } if lfigpi mul 0 0 x1 y1 lfigdistance mul 180 div
+ }
+ { x2 y2 lineto pop
+ x2 y2 x1 y1 lfigangle
+ x1 y1 x2 y2 lfigangle
+ x1 y1 x2 y2 lfigdistance
+ } ifelse
+ } ifelse
+ 4 -1 roll setmatrix
+ end
+} def
+
+% lfigsetcurve: set up a Bezier curve from x0 y0 to x3 y3
+% and return arrowhead angles and length of curve (actually 0)
+% x0 y0 x1 y1 x2 y2 x3 y3 lfigsetcurve <angle> <angle> <length>
+/lfigsetcurve
+{ 8 copy curveto pop pop
+ lfigangle
+ 5 1 roll
+ 4 2 roll lfigangle
+ exch
+ 0
+} def
+
+% lfigpaintpath: paint a path of the given shape
+% /paint [ shape ] lfigpaintpath -
+/lfigpaintpath
+{
+ 10 dict begin
+ 0 newpath
+ /prevseen false def
+ /curveseen false def
+ { lfiggetnextitem
+ dup 0 eq { pop exit }
+ { 1 eq
+ { /curveseen true def
+ /curve exch def
+ curve length 0 eq { /curveseen false def } if
+ }
+ { /ycurr exch def
+ /xcurr exch def
+ prevseen
+ { curveseen
+ { curve length 4 eq
+ { xprev yprev
+ curve 0 get curve 1 get
+ curve 2 get curve 3 get
+ xcurr ycurr
+ lfigsetcurve pop pop pop
+ }
+ { xprev yprev xcurr ycurr
+ curve length 1 ge { curve 0 get } { 0 } ifelse
+ curve length 2 ge { curve 1 get } { 0 } ifelse
+ curve length 3 ge { curve 2 get } { true } ifelse
+ 7 1 roll
+ lfigsetarc pop pop pop
+ } ifelse
+ }
+ { xcurr ycurr lineto
+ } ifelse
+ }
+ { xcurr ycurr moveto
+ } ifelse
+ /xprev xcurr def
+ /yprev ycurr def
+ /prevseen true def
+ /curveseen false def
+ } ifelse
+ } ifelse
+ } loop pop pop cvx exec
+ end
+} def
+
+% stroke a path of the given shape in the given linestyle and dash length.
+% Return the origin and angle of the backward and forward arrow heads.
+% dashlength /linestyle [shape] lfigdopath [<point> <angle>] [<point> <angle>]
+/lfigdopath
+{
+ 10 dict begin
+ 0
+ /prevseen false def
+ /curveseen false def
+ /backarrow [] def
+ /fwdarrow [] def
+ {
+ lfiggetnextitem
+ dup 0 eq { pop exit }
+ {
+ 1 eq
+ { /curveseen true def
+ /curve exch def
+ curve length 0 eq { /prevseen false def } if
+ }
+ { /ycurr exch def
+ /xcurr exch def
+ prevseen
+ { newpath xprev yprev moveto
+ curveseen
+ { curve length 4 eq
+ { xprev yprev
+ curve 0 get curve 1 get
+ curve 2 get curve 3 get
+ xcurr ycurr lfigsetcurve
+ }
+ { xprev yprev xcurr ycurr
+ curve length 1 ge { curve 0 get } { 0 } ifelse
+ curve length 2 ge { curve 1 get } { 0 } ifelse
+ curve length 3 ge { curve 2 get } { true } ifelse
+ 7 1 roll
+ lfigsetarc
+ } ifelse
+ }
+ { xcurr ycurr lineto
+ xcurr ycurr xprev yprev lfigangle dup 180 sub
+ xprev yprev xcurr ycurr lfigdistance
+ } ifelse
+ 6 index 6 index cvx exec
+ [ xprev yprev 5 -1 roll ]
+ backarrow length 0 eq
+ { /backarrow exch def }
+ { pop } ifelse
+ [ xcurr ycurr 4 -1 roll ] /fwdarrow exch def
+ } if
+ /xprev xcurr def
+ /yprev ycurr def
+ /prevseen true def
+ /curveseen false def
+ } ifelse
+ } ifelse
+ } loop
+ pop pop pop pop
+ backarrow length 0 eq { [ 0 0 0 ] } { backarrow } ifelse
+ fwdarrow length 0 eq { [ 0 0 0 ] } { fwdarrow } ifelse
+ end
+} def
+
+% lfigdoarrow: draw an arrow head of given form
+% dashlength /lstyle /pstyle hfrac height width [ <point> <angle> ] lfigdoarrow -
+/lfigdoarrow
+{ matrix currentmatrix 8 1 roll
+ dup 0 get 1 index 1 get translate
+ 2 get rotate
+ [ 2 index neg 2 index 0 0
+ 3 index 3 index neg
+ 1 index 10 index mul 0
+ 7 index 7 index ]
+ 4 1 roll pop pop pop
+ dup 3 1 roll
+ gsave lfigpaintpath grestore lfigdopath pop pop
+ setmatrix
+} def
+
+% arrow head styles
+/lfigopen 0.0 def
+/lfighalfopen 0.5 def
+/lfigclosed 1.0 def
+
+% stroke no arrows, forward, back, and both
+/lfignoarrow { pop pop pop pop pop pop pop pop } def
+/lfigforward { 7 -1 roll lfigdoarrow pop } def
+/lfigback { 8 -2 roll pop lfigdoarrow } def
+/lfigboth { 8 -1 roll 7 copy lfigdoarrow pop 7 -1 roll lfigdoarrow } def
+
+% lfigprevious: return previous point on path
+/lfigprevious
+{ lfigisnumbertype
+ { 2 copy }
+ { lfigisarraytype
+ { 2 index 2 index }
+ { 0 0 }
+ ifelse
+ } ifelse
+} def
+
+% label a point in 2nd top dictionary: <point> /name lfigpointdef -
+/lfigpointdef
+{
+ % (Entering lfigpointdef) lfigdebugprint
+ [ 4 2 roll transform
+ /itransform cvx ] cvx
+ currentdict end
+ 3 1 roll
+ % currentdict length currentdict maxlength lt
+ % { def }
+ % { exec moveto (too many labels) show stop }
+ % ifelse
+ def
+ begin
+ % (Leaving lfigpointdef) lfigdebugprint
+} def
+
+% promote labels from second top to third top dictionary
+% <string> lfigpromotelabels -
+/lfigpromotelabels
+{
+ % (Entering lfigpromotelabels) lfigdebugprint
+ currentdict end exch currentdict end
+ { exch 20 string cvs 2 index
+ (@) lfigconcat exch lfigconcat cvn exch def
+ } forall pop begin
+ % (Leaving lfigpromotelabels) lfigdebugprint
+} def
+
+% show labels (except CIRCUM): - lfigshowlabels -
+/lfigshowlabels
+{
+ % (Entering lfigshowlabels) lfigdebugprint
+ currentdict end
+ currentdict
+ { 1 index 20 string cvs (CIRCUM) search % if CIRCUM in key
+ { pop pop pop pop pop }
+ { pop cvx exec 2 copy
+ newpath 1.5 pt 0 360 arc
+ 0 setgray fill
+ /Times-Roman findfont 8 pt scalefont setfont
+ moveto 0.2 cm 0.1 cm rmoveto 20 string cvs show
+ }
+ ifelse
+ } forall
+ begin
+ % (Leaving lfigshowlabels) lfigdebugprint
+} def
+
+% fix an angle to 0 <= res < 360: <angle> lfigfixangle <angle>
+/lfigfixangle
+{
+ % (Entering lfigfixangle) lfigdebugprint
+ { dup 0 ge { exit } if
+ 360 add
+ } loop
+ { dup 360 lt { exit } if
+ 360 sub
+ } loop
+ % (Leaving lfigfixangle) lfigdebugprint
+} def
+
+% find point on circumference of box: alpha a b lfigboxcircum x y
+/lfigboxcircum
+{
+ % (Entering lfigboxcircum) lfigdebugprint
+ 4 dict begin
+ /b exch def
+ /a exch def
+ lfigfixangle /alpha exch def
+ 0 0 a b lfigangle /theta exch def
+
+ % if alpha <= theta, return (a, a*tan(alpha))
+ alpha theta le
+ { a a alpha sin mul alpha cos div }
+ {
+ % else if alpha <= 180 - theta, return (b*cot(alpha), b)
+ alpha 180 theta sub le
+ { b alpha cos mul alpha sin div b }
+ {
+ % else if alpha <= 180 + theta, return (-a, -a*tan(alpha))
+ alpha 180 theta add le
+ { a neg a neg alpha sin mul alpha cos div }
+ {
+ % else if alpha <= 360 - theta, return (-b*cot(alpha), -b)
+ alpha 360 theta sub le
+ { b neg alpha cos mul alpha sin div b neg }
+ {
+ % else 360 - theta <= alpha, return (a, a*tan(alpha))
+ a a alpha sin mul alpha cos div
+ } ifelse
+ } ifelse
+ } ifelse
+ } ifelse
+ end
+ % (Leaving lfigboxcircum) lfigdebugprint
+} def
+
+% find quadratic roots (assume a != 0): a b c lfigqroots x1 x2 2
+% or x2 1
+% or 0
+/lfigqroots
+{
+ 4 dict begin
+ /c exch def
+ /b exch def
+ /a exch def
+ /disc b b mul 4 a c mul mul sub def
+ disc 0 lt
+ { 0
+ }
+ { disc 0 eq
+ { b neg 2 a mul div
+ 1
+ }
+ { b neg disc sqrt add 2 a mul div
+ b neg disc sqrt sub 2 a mul div
+ 2
+ }
+ ifelse
+ }
+ ifelse
+ end
+} def
+
+% work our which quadrant: <angle> lfigquadrant <0-3>
+/lfigquadrant
+{ dup 90 lt
+ { pop 0
+ }
+ { dup 180 lt
+ { pop 1
+ }
+ { 270 lt
+ { 2
+ }
+ { 3
+ } ifelse
+ } ifelse
+ } ifelse
+} def
+
+% find curvebox circum, assuming upper right quadrant: alpha a b xmk lfigcb x y
+/lfigcb
+{
+ 6 dict begin
+ /xmk exch def
+ /b exch def
+ /a exch def
+ /alpha exch def
+ /theta1 0 0 a b xmk sub lfigangle def
+ /theta2 0 0 a xmk sub b lfigangle def
+ alpha theta1 le
+ { % if alpha <= theta1, return (a, a*tan(alpha))
+ a a alpha sin mul alpha cos div
+ }
+ { alpha theta2 ge
+ { % else if alpha > theta2, return (b*cot(alpha), b)
+ b alpha cos mul alpha sin div b
+ }
+ {
+ % else, return the intersection of line and circle
+ a xmk sub b xmk sub xmk 0 0 alpha lfigcircleintersect
+ dup 0 eq
+ { % should never happen, just return any reasonable point
+ pop
+ a b 0.5 lfigpmul
+ }
+ { 1 eq
+ { % should never happen, just return the point on top of stack
+ }
+ { % the usual case, two points on stack, return the larger
+ lfigpmax
+ } ifelse
+ } ifelse
+ } ifelse
+ } ifelse
+ end
+} def
+
+% find point on circumference of curvebox: alpha a b xmk lfigcurveboxcircum x y
+/lfigcurveboxcircum
+{
+ % (Entering lfigcurveboxcircum) lfigdebugprint
+ 5 dict begin
+ /xmk exch def
+ /b exch def
+ /a exch def
+ lfigfixangle /alpha exch def
+
+ % work out which quadrant we are in, and reflect accordingly
+ /quad alpha lfigquadrant def
+ quad 0 eq
+ { alpha a b xmk lfigcb
+ }
+ { quad 1 eq
+ { 180 alpha sub a b xmk lfigcb exch neg exch
+ }
+ { quad 2 eq
+ { alpha 180 sub a b xmk lfigcb neg exch neg exch
+ }
+ { 360 alpha sub a b xmk lfigcb neg
+ } ifelse
+ } ifelse
+ } ifelse
+ end
+ % (Leaving lfigcurveboxcircum) lfigdebugprint
+} def
+
+% find point on circumference of diamond: alpha a b lfigdiamondcircum x y
+/lfigdiamondcircum
+{
+ % (Entering lfigdiamondcircum) lfigdebugprint
+ 4 dict begin
+ /b exch def
+ /a exch def
+ lfigfixangle /alpha exch def
+ b alpha cos abs mul a alpha sin abs mul add /denom exch def
+ a b mul alpha cos mul denom div
+ a b mul alpha sin mul denom div
+ end
+ % (Leaving lfigdiamondcircum) lfigdebugprint
+} def
+
+% find point on circumference of ellipse: alpha a b lfigellipsecircum x y
+/lfigellipsecircum
+{
+ % (Entering lfigellipsecircum) lfigdebugprint
+ 4 dict begin
+ /b exch def
+ /a exch def
+ lfigfixangle /alpha exch def
+ b alpha cos mul dup mul a alpha sin mul dup mul add sqrt /denom exch def
+ a b mul alpha cos mul denom div
+ a b mul alpha sin mul denom div
+ end
+ % (Leaving lfigellipsecircum) lfigdebugprint
+} def
+
+% find point of intersection of two lines each defined by two points
+% x1 y1 x2 y2 x3 y3 x4 y4 lfiglineintersect x y
+/lfiglineintersect
+{
+ % (Entering lfiglineintersect) lfigdebugprint
+ 13 dict begin
+ /y4 exch def
+ /x4 exch def
+ /y3 exch def
+ /x3 exch def
+ /y2 exch def
+ /x2 exch def
+ /y1 exch def
+ /x1 exch def
+ x2 x1 sub /x21 exch def
+ x4 x3 sub /x43 exch def
+ y2 y1 sub /y21 exch def
+ y4 y3 sub /y43 exch def
+ y21 x43 mul y43 x21 mul sub /det exch def
+
+ % calculate x
+ y21 x43 mul x1 mul
+ y43 x21 mul x3 mul sub
+ y3 y1 sub x21 mul x43 mul add
+ det div
+
+ % calculate y
+ x21 y43 mul y1 mul
+ x43 y21 mul y3 mul sub
+ x3 x1 sub y21 mul y43 mul add
+ det neg div
+
+ end
+ % (Leaving lfiglineintersect) lfigdebugprint
+} def
+
+% find point on circumference of polygon
+% alpha radius num theta lfigpolycircum x y
+/lfigpolycircum
+{
+ % (Entering lfigpolycircum) lfigdebugprint
+ 13 dict begin
+ /theta exch def
+ /num exch def
+ /radius exch def
+ /alpha exch def
+
+ % calculate delta, the angle from theta to alpha
+ alpha theta sub lfigfixangle
+
+ % calculate the angle which is the multiple of 360/num closest to delta
+ 360 num div div truncate 360 num div mul theta add /anglea exch def
+
+ % calculate the next multiple of 360/num after anglea
+ anglea 360 num div add /angleb exch def
+
+ % intersect the line through these two points with the alpha line
+ anglea cos anglea sin angleb cos angleb sin
+ 0 0 alpha cos 2 mul alpha sin 2 mul
+ lfiglineintersect radius lfigpmul
+
+ end
+ % (Leaving lfigpolycircum) lfigdebugprint
+} def
+
+% find point of intersection of a point and a circle
+% x0 y0 r x1 y1 theta lfigcircleintersect xa ya xb yb 2
+% or xb yb 1
+% or 0
+/lfigcircleintersect
+{
+ % (Entering lfigcircleintersect) lfigdebugprint
+ 15 dict begin
+ /theta exch def
+ /y1 exch def
+ /x1 exch def
+ /r exch def
+ /y0 exch def
+ /x0 exch def
+
+ % if sin(theta) = 0 then line is horizontal and y must be y1
+ theta sin abs 0.00001 lt
+ {
+ /a 1 def
+ /b -2 x0 mul def
+ /c x0 dup mul y1 y0 sub dup mul add r dup mul sub def
+ a b c lfigqroots dup
+ 0 eq
+ { pop
+ 0
+ }
+ { 1 eq
+ { y1 1
+ }
+ { y1 exch y1 2
+ } ifelse
+ } ifelse
+ }
+ {
+ /ct theta cos theta sin div def
+ /a ct ct mul 1 add def
+ /b ct x1 x0 sub mul y1 add y0 sub 2 mul def
+ /c x1 x0 sub dup mul y1 y0 sub dup mul add r dup mul sub def
+ a b c lfigqroots dup
+ 0 eq
+ { pop
+ 0
+ }
+ { 1 eq
+ { y1 add /yb exch def
+ yb y1 sub ct mul x1 add /xb exch def
+ xb yb 1
+ }
+ { y1 add /ya exch def
+ ya y1 sub ct mul x1 add /xa exch def
+ y1 add /yb exch def
+ yb y1 sub ct mul x1 add /xb exch def
+ xa ya xb yb 2
+ } ifelse
+ } ifelse
+ } ifelse
+ end
+ % (Leaving lfigcircleintersect) lfigdebugprint
+} def
+
+% add CIRCUM operator with this body: <array> lfigcircumdef -
+/lfigcircumdef
+{ % (Entering lfigcircumdef) lfigdebugprint
+ /CIRCUM exch cvx
+ currentdict end
+ 3 1 roll
+ % currentdict length currentdict maxlength lt
+ % { def }
+ % { exec moveto (too many labels) show stop }
+ % ifelse
+ def
+ begin
+ % (Leaving lfigcircumdef) lfigdebugprint
+} def
+
+end
+%%EndResource
+
+%%BeginResource: procset LoutBasicSetup
+% @PrependGraphic file /export/home/6monthspace/jeff/lout.lib/include/bsf.lpg
+
+% width height linethickness louteuro -
+% draw a Euro symbol of this width and height with this line thickness
+/louteuro {
+ 20 dict begin
+ /eurothick exch def
+ /euroheight exch def
+ /eurowidth exch def
+ /eurostrokewidth euroheight 0.8 mul def
+ /eurostep eurothick 60 cos mul 60 sin div def
+ /eurotheta 40 def
+
+ % llx lly width thickness louteurobox -
+ % draw angled box starting at (llx, lly) with given width and thickness
+ /louteurobox
+ {
+ /euroboxthick exch def
+ /euroboxwidth exch def
+ newpath moveto euroboxwidth 0 rlineto
+ eurostep euroboxthick rlineto
+ euroboxwidth neg 0 rlineto closepath fill
+ } def
+
+ % lower cross stroke
+ 0 euroheight 2 div eurothick 1.5 mul sub
+ eurostrokewidth eurothick louteurobox
+
+ % upper cross stroke
+ 0 euroheight 2 div eurothick 0.5 mul add
+ eurostrokewidth eurostep 2 mul add eurothick louteurobox
+
+ % circular part
+ /eurohctr eurowidth euroheight 2 div eurotheta cos mul sub def
+ /eurovctr euroheight 2 div def
+ newpath
+ eurohctr eurovctr eurovctr eurotheta 350 eurotheta sub arc
+ eurohctr eurovctr eurovctr eurothick sub 365 eurotheta sub eurotheta arcn
+ closepath fill
+ end
+} def
+
+% path for @FullWidthRule symbol
+/LoutRule
+{ 0 0 moveto xsize 0 lineto
+} def
+
+% path for @Box symbol
+/LoutBox
+{ 0 0 moveto xsize 0 lineto
+ xsize ysize lineto 0 ysize lineto
+ closepath
+} def
+
+% path for @CurveBox symbol
+/LoutCurveBox
+{ xmark 0 moveto
+ xsize xmark sub xmark xmark 270 360 arc
+ xsize xmark sub ysize xmark sub xmark 0 90 arc
+ xmark ysize xmark sub xmark 90 180 arc
+ xmark xmark xmark 180 270 arc
+ closepath
+} def
+
+% path for @ShadowBox symbol
+/LoutShadowBox
+{ xmark 2 mul 0 moveto xsize 0 lineto
+ xsize ysize xmark 2 mul sub lineto
+ xsize xmark sub ysize xmark 2 mul sub lineto
+ xsize xmark sub xmark lineto
+ xmark 2 mul xmark lineto
+ closepath
+} def
+
+% set up dictionary containing margin note data: parity LoutMargSet -
+/LoutMargSet
+{ /LoutMargDict 12 dict def
+ LoutMargDict begin
+ /parity exch def
+ /matr matrix currentmatrix def
+ /rightx xsize def
+ /lefty ysize def % highest allowable point for top of next left note
+ /righty ysize def % highest allowable point for top of next right note
+ /max { 2 copy gt { pop } { exch pop } ifelse } def
+ /min { 2 copy lt { pop } { exch pop } ifelse } def
+ end
+} def
+
+%translate coordinate system for marginal notes: type LoutMargShift -
+% where type 0 is left margin, 1 is right margin, 2 is outer, 3 is inner
+/LoutMargShift
+{ LoutMargDict begin
+
+ % y coordinate of top of note, in margin coords, before vertical adjust
+ 0 ysize transform matr itransform exch pop
+
+ % decide whether left or right margin based on type and parity
+ exch [ 0 1 parity 1 parity sub ] exch get 0 eq
+ {
+ % left margin: adjust top of note downwards if overlaps previous note
+ lefty min
+
+ % bottom of note is new lefty position and also translate position
+ ysize sub dup /lefty exch def
+
+ % want right edge of note at coordinate zero
+ xsize neg exch
+ }
+ {
+ % right margin: adjust top of note downwards if overlaps previous note
+ righty min
+
+ % bottom of note is new righty position and also translate position
+ ysize sub dup /righty exch def
+
+ % want left edge of note at coordinate rightx
+ rightx exch
+ } ifelse
+
+ % stack now contains coord of bottom left corner in margin coordinates
+ matr setmatrix translate
+ end
+} def
+
+% create LoutPageDict with left, right, foot, top for @Place symbol users
+/LoutPageSet
+{
+ /LoutPageDict 5 dict def
+ LoutPageDict begin
+ /matr matrix currentmatrix def
+ /left 0 def
+ /right xsize def
+ /foot 0 def
+ /top ysize def
+ end
+
+} def
+
+%%EndResource
+
+%%EndProlog
+
+%%BeginSetup
+%%IncludeResource: font Times-Roman
+/Times-Romanfnt82 vec2 /Times-Roman LoutRecode
+/fnt82 { /Times-Romanfnt82 LoutFont } def
+%%IncludeResource: font Times-Bold
+/Times-Boldfnt84 vec2 /Times-Bold LoutRecode
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diff --git a/doc/expert/README b/doc/expert/README
index a69bf2b..8bf70b6 100644
--- a/doc/expert/README
+++ b/doc/expert/README
@@ -16,4 +16,4 @@ copy of the final outfile.ps is included. There
should be no warning messages on the fifth run.
Jeffrey H. Kingston
-9 March 2000
+8 April 2000
diff --git a/doc/expert/all b/doc/expert/all
index e2a5a78..84b3ae7 100644
--- a/doc/expert/all
+++ b/doc/expert/all
@@ -10,8 +10,8 @@ Lout
Document Formatting System }
@Author { Jeffrey H. Kingston }
- @Edition { Version 3.18
-February, 2000 }
+ @Edition { Version 3.20
+April, 2000 }
@Publisher { @I { @CopyRight Copyright 1991, 2000, Jeffrey
H. Kingston, Basser Department of Computer Science, The University
of Sydney 2006, Australia.} }
diff --git a/doc/expert/exa_bibl b/doc/expert/exa_bibl
index f1e1930..9de5f26 100644
--- a/doc/expert/exa_bibl
+++ b/doc/expert/exa_bibl
@@ -65,7 +65,7 @@ The right parameter of @@Open may use the exported parameters of the
left, and so the result is
@ID {
@Reference&&strunk1979style @Open
-{ @Author, {Slope @Font @Title}. @Publisher, @Year. } &0io
+{ @Author, {Slope @Font @Title}. @Publisher, @Year. } |0io
}
Incidentally, we are not limited to just one database of references;
several @@Database symbols can nominate the same symbol, and invocations of
@@ -105,7 +105,7 @@ and so on. The following prints the reference whose tag is
}
It has result
@ID {
-@RefStyle&&Book @Open { @Style strunk1979style } &0io
+@RefStyle&&Book @Open { @Style strunk1979style } |0io
}
Notice how the @Code "@Style" parameter of @Code "@RefStyle" is given the
parameter {@Code strunk1979style}, which it uses to open the appropriate
diff --git a/doc/expert/outfile.ps b/doc/expert/outfile.ps
new file mode 100644
index 0000000..2f14b30
--- /dev/null
+++ b/doc/expert/outfile.ps
@@ -0,0 +1,16122 @@
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+ /ymark exch def
+ /xmark exch def
+ /ysize exch def
+ /xsize exch def
+} def
+
+/LoutGr2 { gsave translate LoutGraphic gsave } def
+
+/LoutFont
+{ findfont exch scalefont setfont
+} bind def
+
+/LoutRecode {
+ { findfont dup length dict begin
+ {1 index /FID ne {def} {pop pop} ifelse} forall
+ /Encoding exch def
+ currentdict end definefont pop
+ }
+ stopped pop
+} bind def
+
+/BeginEPSF {
+ /LoutEPSFState save def
+ /dict_count countdictstack def
+ /op_count count 1 sub def
+ userdict begin
+ /showpage { } def
+ 0 setgray 0 setlinecap
+ 1 setlinewidth 0 setlinejoin
+ 10 setmiterlimit [] 0 setdash newpath
+ /languagelevel where
+ { pop languagelevel
+ 1 ne
+ { false setstrokeadjust false setoverprint
+ } if
+ } if
+} bind def
+
+/EndEPSF {
+ count op_count sub { pop } repeat
+ countdictstack dict_count sub { end } repeat
+ LoutEPSFState restore
+} bind def
+%%EndResource
+
+%%BeginResource: encoding vec2
+/vec2 [
+/.notdef /.notdef /.notdef /.notdef /.notdef /.notdef /.notdef /.notdef
+/.notdef /.notdef /.notdef /.notdef /.notdef /.notdef /.notdef /.notdef
+/.notdef /.notdef /.notdef /.notdef /.notdef /.notdef /.notdef /.notdef
+/.notdef /.notdef /.notdef /.notdef /.notdef /.notdef /.notdef /.notdef
+/space /exclam /quotedbl /numbersign /dollar /percent /ampersand /quoteright
+/parenleft /parenright /asterisk /plus /comma /hyphen /period /slash
+/zero /one /two /three /four /five /six /seven
+/eight /nine /colon /semicolon /less /equal /greater /question
+/at /A /B /C /D /E /F /G
+/H /I /J /K /L /M /N /O
+/P /Q /R /S /T /U /V /W
+/X /Y /Z /bracketleft /backslash /bracketright /asciicircum /underscore
+/quoteleft /a /b /c /d /e /f /g
+/h /i /j /k /l /m /n /o
+/p /q /r /s /t /u /v /w
+/x /y /z /braceleft /bar /braceright /asciitilde /.notdef
+/quotesinglbase /quotedblbase /ellipsis /OE /oe /quotedblleft /quotedblright /fi
+/fl /endash /emdash /bullet /dagger /daggerdbl /florin /fraction
+/dotlessi /grave /acute /circumflex /tilde /macron /breve /dotaccent
+/dieresis /.notdef /ring /cedilla /.notdef /hungarumlaut /ogonek /caron
+/space /exclamdown /cent /sterling /currency /yen /brokenbar /section
+/dieresis /copyright /ordfeminine /guillemotleft /logicalnot /hyphen /registered /macron
+/degree /plusminus /twosuperior /threesuperior /acute /mu /paragraph /periodcentered
+/cedilla /onesuperior /ordmasculine /guillemotright /onequarter /onehalf /threequarters /questiondown
+/Agrave /Aacute /Acircumflex /Atilde /Adieresis /Aring /AE /Ccedilla
+/Egrave /Eacute /Ecircumflex /Edieresis /Igrave /Iacute /Icircumflex /Idieresis
+/Eth /Ntilde /Ograve /Oacute /Ocircumflex /Otilde /Odieresis /multiply
+/Oslash /Ugrave /Uacute /Ucircumflex /Udieresis /Yacute /Thorn /germandbls
+/agrave /aacute /acircumflex /atilde /adieresis /aring /ae /ccedilla
+/egrave /eacute /ecircumflex /edieresis /igrave /iacute /icircumflex /idieresis
+/eth /ntilde /ograve /oacute /ocircumflex /otilde /odieresis /divide
+/oslash /ugrave /uacute /ucircumflex /udieresis /yacute /thorn /ydieresis
+] def
+%%EndResource
+
+%%BeginResource: procset LoutTabPrependGraphic
+% @PrependGraphic file /export/home/6monthspace/jeff/lout.lib/include/tabf.lpg
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+% %
+% PostScript @SysPrependGraphic file for @Tab %
+% %
+% To assist in avoiding name clashes, the names %
+% of all these symbols begin with "ltab". %
+% %
+% Jeffrey H. Kingston %
+% 24 September 1991 %
+% 22 December 1992 %
+% %
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+% linewidth ltabhs -
+% horizontal single line
+/ltabhs
+{ 0 0 moveto xsize 0 lineto
+ setlinewidth 0 setlinecap stroke
+} def
+
+% linewidth ltabhsp -
+% horizontal single line with projecting ends
+/ltabhsp
+{ 0 0 moveto xsize 0 lineto
+ setlinewidth 2 setlinecap stroke
+} def
+
+% linewidth ltabhd -
+% horizontal double line
+/ltabhd
+{ dup dup
+ 0 0 moveto xsize 0 lineto
+ 0 exch 3 mul moveto xsize exch 3 mul lineto
+ setlinewidth 0 setlinecap stroke
+} def
+
+% linewidth ltabhdb -
+% horizontal double line below mark
+/ltabhdb
+{ dup dup
+ 0 0 moveto xsize 0 lineto
+ 0 exch -3 mul moveto xsize exch -3 mul lineto
+ setlinewidth 0 setlinecap stroke
+} def
+
+% linewidth ltabhdnw -
+% horizontal double line with northwest corner
+/ltabhdnw
+{ dup dup dup dup
+ 0 0 moveto xsize 0 lineto
+ xsize exch 3 mul moveto
+ -3 mul exch 3 mul lineto
+ -3 mul 0 lineto
+ setlinewidth 0 setlinejoin 2 setlinecap stroke
+} def
+
+% linewidth ltabhdne -
+% horizontal double line with northeast corner
+/ltabhdne
+{ dup dup dup dup
+ 0 0 moveto xsize 0 lineto
+ 0 exch 3 mul moveto
+ 3 mul xsize add exch 3 mul lineto
+ 3 mul xsize add 0 lineto
+ setlinewidth 0 setlinejoin 2 setlinecap stroke
+} def
+
+% linewidth ltabhdsw -
+% horizontal double line with southwest corner
+/ltabhdsw
+{ dup dup dup dup
+ 0 0 moveto xsize 0 lineto
+ xsize exch -3 mul moveto
+ -3 mul exch -3 mul lineto
+ -3 mul 0 lineto
+ setlinewidth 0 setlinejoin 2 setlinecap stroke
+} def
+
+% linewidth ltabhdse -
+% horizontal double line with southeast corner
+/ltabhdse
+{ dup dup dup dup
+ 0 0 moveto xsize 0 lineto
+ 0 exch -3 mul moveto
+ 3 mul xsize add exch -3 mul lineto
+ 3 mul xsize add 0 lineto
+ setlinewidth 0 setlinejoin 2 setlinecap stroke
+} def
+
+% linewidth ltabvs -
+% vertical single line
+/ltabvs
+{ 0 0 moveto 0 ysize lineto
+ setlinewidth 0 setlinecap stroke
+} def
+
+% linewidth ltabvd -
+% vertical double line
+/ltabvd
+{ dup dup
+ 0 0 moveto 0 ysize lineto
+ -3 mul 0 moveto -3 mul ysize lineto
+ setlinewidth 0 setlinecap stroke
+} def
+
+% linewidth ltabvdr -
+% vertical double line to right of mark
+/ltabvdr
+{ dup dup
+ 0 0 moveto 0 ysize lineto
+ 3 mul 0 moveto 3 mul ysize lineto
+ setlinewidth 0 setlinecap stroke
+} def
+%%EndResource
+
+%%BeginResource: procset LoutFigPrependGraphic
+% @PrependGraphic file /export/home/6monthspace/jeff/lout.lib/include/figf.lpg
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+% %
+% PostScript @SysPrependGraphic file for @Fig Jeffrey H. Kingston %
+% Version 2.0 (includes CIRCUM label) January 1992 %
+% %
+% To assist in avoiding name clashes, the names of all symbols %
+% defined here begin with "lfig". However, this is not feasible %
+% with user-defined labels and some labels used by users. %
+% %
+% <point> is two numbers, a point. %
+% <length> is one number, a length %
+% <angle> is one number, an angle in degrees %
+% <dashlength> is one number, the preferred length of a dash %
+% %
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+errordict begin
+ /handleerror
+ {
+ { /Times-Roman findfont 8 pt scalefont setfont
+ 0 setgray 4 pt 4 pt moveto
+ $error /errorname get
+ dup lfigdict exch known
+ { lfigdict exch get }
+ { 30 string cvs } ifelse
+ show
+ ( Command: ) show
+ $error /command get 30 string cvs show
+ } stopped {} if
+ showpage stop
+ } def
+end
+
+% concat strings: <string> <string> lfigconcat <string>
+% must be defined outside lfigdict since used in lfigpromotelabels
+/lfigconcat
+{ 2 copy length exch length add string
+ dup 0 4 index putinterval
+ dup 3 index length 3 index putinterval
+ 3 1 roll pop pop
+} def
+
+% <string> lfigdebugprint -
+% must be defined outside lfigdict since used in arbitrary places
+% /lfigdebugprint
+% { print
+% (; operand stack:\n) print
+% count copy
+% count 2 idiv
+% { ==
+% (\n) print
+% } repeat
+% (\n) print
+% } def
+
+/lfigdict 120 dict def
+lfigdict begin
+
+% error messages
+/dictfull (dictfull error: too many labels?) def
+/dictstackoverflow (dictstackoverflow error: labels nested too deeply?) def
+/execstackoverflow (execstackoverflow error: figure nested too deeply?) def
+/limitcheck (limitcheck error: figure nested too deeply or too large?) def
+/syntaxerror (syntaxerror error: syntax error in text of figure?) def
+/typecheck (typecheck error: syntax error in text of figure?) def
+/undefined (undefined error: unknown or misspelt label?) def
+/VMError (VMError error: run out of memory?) def
+
+% push pi onto stack: - lfigpi <num>
+/lfigpi 3.14159 def
+
+% arc directions
+/clockwise false def
+/anticlockwise true def
+
+% maximum of two numbers: <num> <num> lfigmax <num>
+/lfigmax { 2 copy gt { pop } { exch pop } ifelse } def
+
+% minimum of two numbers: <num> <num> lfigmin <num>
+/lfigmin { 2 copy lt { pop } { exch pop } ifelse } def
+
+% add two points: <point> <point> lfigpadd <point>
+/lfigpadd { exch 3 1 roll add 3 1 roll add exch } def
+
+% subtract first point from second: <point> <point> lfigpsub <point>
+/lfigpsub { 3 2 roll sub 3 1 roll exch sub exch } def
+
+% max two points: <point> <point> lfigpmax <point>
+/lfigpmax { exch 3 1 roll lfigmax 3 1 roll lfigmax exch } def
+
+% min two points: <point> <point> lfigpmin <point>
+/lfigpmin { exch 3 1 roll lfigmin 3 1 roll lfigmin exch } def
+
+% scalar multiplication: <point> <num> lfigpmul <point>
+/lfigpmul { dup 3 1 roll mul 3 1 roll mul exch } def
+
+% point at angle and distance: <point> <length> <angle> lfigatangle <point>
+/lfigatangle { 2 copy cos mul 3 1 roll sin mul lfigpadd } def
+
+% angle from one point to another: <point> <point> lfigangle <angle>
+/lfigangle { lfigpsub 2 copy 0 eq exch 0 eq and {pop} {exch atan} ifelse } def
+
+% distance between two points: <point> <point> lfigdistance <length>
+/lfigdistance { lfigpsub dup mul exch dup mul add sqrt } def
+
+% difference in x coords: <point> <point> lfigxdistance <length>
+/lfigxdistance { pop 3 1 roll pop sub } def
+
+%difference in y coords: <point> <point> lfigydistance <length>
+/lfigydistance { 3 1 roll pop sub exch pop } def
+
+% stroke a solid line: <length> <dashlength> lfigsolid -
+/lfigsolid
+{ pop pop [] 0 setdash stroke
+} def
+
+% stroke a lfigdashed line: <length> <dashlength> lfigdashed -
+/lfigdashed
+{ 2 copy div 2 le 1 index 0 le or
+ { exch pop 1 pt lfigmax [ exch dup ] 0 setdash }
+ { dup [ exch 4 2 roll 2 copy div
+ 1 sub 2 div ceiling dup 4 1 roll
+ 1 add mul sub exch div ] 0 setdash
+ } ifelse stroke
+} def
+
+% stroke a lfigcdashed line: <length> <dashlength> lfigcdashed -
+/lfigcdashed
+{ 2 copy le 1 index 0 le or
+ { exch pop 1 pt lfigmax [ exch dup ] dup 0 get 2 div setdash }
+ { dup [ 4 2 roll exch 2 copy exch div
+ 2 div ceiling div 1 index sub
+ ] exch 2 div setdash
+ } ifelse stroke
+} def
+
+% stroke a dotted line: <length> <dashlength> lfigdotted -
+/lfigdotted
+{ 2 copy le 1 index 0 le or
+ { exch pop 1 pt lfigmax [ exch 0 exch ] 0 setdash }
+ { 1 index exch div ceiling div
+ [ 0 3 2 roll ] 0 setdash
+ } ifelse stroke
+} def
+
+% stroke a noline line: <length> <dashlength> lfignoline -
+/lfignoline
+{ pop pop
+} def
+
+% painting (i.e. filling): - lfigwhite - (etc.)
+/lfignopaint { } def
+/lfignochange { fill } def
+/lfigdarkblue { 0.0 0.0 0.5 setrgbcolor fill } def
+/lfigblue { 0.0 0.0 1.0 setrgbcolor fill } def
+/lfiglightblue { 0.5 0.5 1.0 setrgbcolor fill } def
+/lfigdarkgreen { 0.0 0.5 0.0 setrgbcolor fill } def
+/lfiggreen { 0.0 1.0 0.0 setrgbcolor fill } def
+/lfiglightgreen { 0.5 1.0 0.5 setrgbcolor fill } def
+/lfigdarkred { 0.5 0.0 0.0 setrgbcolor fill } def
+/lfigred { 1.0 0.0 0.0 setrgbcolor fill } def
+/lfiglightred { 1.0 0.5 0.5 setrgbcolor fill } def
+/lfigdarkcyan { 0.0 0.5 0.5 setrgbcolor fill } def
+/lfigcyan { 0.0 1.0 1.0 setrgbcolor fill } def
+/lfiglightcyan { 0.5 1.0 1.0 setrgbcolor fill } def
+/lfigdarkmagenta { 0.5 0.0 0.5 setrgbcolor fill } def
+/lfigmagenta { 1.0 0.0 1.0 setrgbcolor fill } def
+/lfiglightmagenta { 1.0 0.5 1.0 setrgbcolor fill } def
+/lfigdarkyellow { 0.5 0.5 0.0 setrgbcolor fill } def
+/lfigyellow { 1.0 1.0 0.0 setrgbcolor fill } def
+/lfiglightyellow { 1.0 1.0 0.5 setrgbcolor fill } def
+/lfigdarkgray { 0.2 0.2 0.2 setrgbcolor fill } def
+/lfiggray { 0.5 0.5 0.5 setrgbcolor fill } def
+/lfiglightgray { 0.8 0.8 0.8 setrgbcolor fill } def
+/lfigdarkgrey { 0.2 0.2 0.2 setrgbcolor fill } def
+/lfiggrey { 0.5 0.5 0.5 setrgbcolor fill } def
+/lfiglightgrey { 0.8 0.8 0.8 setrgbcolor fill } def
+/lfigblack { 0.0 0.0 0.0 setrgbcolor fill } def
+/lfigwhite { 1.0 1.0 1.0 setrgbcolor fill } def
+
+% line caps (and joins, not currently used)
+/lfigbutt 0 def
+/lfiground 1 def
+/lfigprojecting 2 def
+/lfigmiter 0 def
+/lfigbevel 2 def
+
+% shape and labels of the @Box symbol
+/lfigbox
+{
+ 0 0 /SW lfigpointdef
+ xsize 0 /SE lfigpointdef
+ xsize ysize /NE lfigpointdef
+ 0 ysize /NW lfigpointdef
+ SE 0.5 lfigpmul /S lfigpointdef
+ NW 0.5 lfigpmul /W lfigpointdef
+ W SE lfigpadd /E lfigpointdef
+ S NW lfigpadd /N lfigpointdef
+ NE 0.5 lfigpmul /CTR lfigpointdef
+ [ CTR NE lfigpsub /lfigboxcircum cvx ] lfigcircumdef
+ SW SE NE NW SW
+} def
+
+% shape and labels of the @CurveBox symbol
+/lfigcurvebox
+{
+
+ xsize 0.5 mul ysize 0.5 mul /CTR lfigpointdef
+ xsize 0.5 mul 0 /S lfigpointdef
+ xsize ysize 0.5 mul /E lfigpointdef
+ xsize 0.5 mul ysize /N lfigpointdef
+ 0 ysize 0.5 mul /W lfigpointdef
+
+ xmark 0.293 mul xmark 0.293 mul /SW lfigpointdef
+ xsize xmark 0.293 mul sub xmark 0.293 mul /SE lfigpointdef
+ xsize xmark 0.293 mul sub ysize xmark 0.293 mul sub /NE lfigpointdef
+ xmark 0.293 mul ysize xmark 0.293 mul sub /NW lfigpointdef
+
+ [ xsize ysize 0.5 lfigpmul xmark /lfigcurveboxcircum cvx ] lfigcircumdef
+
+ xmark 0
+ xsize xmark sub 0
+ [ xsize xmark sub xmark ]
+ xsize xmark
+ xsize ysize xmark sub
+ [ xsize xmark sub ysize xmark sub ]
+ xsize xmark sub ysize
+ xmark ysize
+ [ xmark ysize xmark sub ]
+ 0 ysize xmark sub
+ 0 xmark
+ [ xmark xmark ]
+ xmark 0
+} def
+
+% shadow of the @ShadowBox symbol
+% its shape and labels are done, somewhat inaccurately, with lfigbox
+/lfigshadow
+{ xmark 2 mul 0 moveto xsize 0 lineto
+ xsize ysize xmark 2 mul sub lineto
+ xsize xmark sub ysize xmark 2 mul sub lineto
+ xsize xmark sub xmark lineto
+ xmark 2 mul xmark lineto closepath fill
+} def
+
+% shape and labels of the @Square symbol
+/lfigsquare
+{
+ xsize ysize 0.5 lfigpmul /CTR lfigpointdef
+ CTR xsize xsize ysize ysize lfigpmax 0.5 lfigpmul lfigpadd /NE lfigpointdef
+ CTR 0 0 CTR NE lfigdistance 135 lfigatangle lfigpadd /NW lfigpointdef
+ CTR 0 0 CTR NE lfigdistance 225 lfigatangle lfigpadd /SW lfigpointdef
+ CTR 0 0 CTR NE lfigdistance 315 lfigatangle lfigpadd /SE lfigpointdef
+ SW 0.5 lfigpmul SE 0.5 lfigpmul lfigpadd /S lfigpointdef
+ NW 0.5 lfigpmul NE 0.5 lfigpmul lfigpadd /N lfigpointdef
+ SW 0.5 lfigpmul NW 0.5 lfigpmul lfigpadd /W lfigpointdef
+ SE 0.5 lfigpmul NE 0.5 lfigpmul lfigpadd /E lfigpointdef
+ [ CTR NE lfigpsub /lfigboxcircum cvx ] lfigcircumdef
+ SW SE NE NW SW
+} def
+
+% shape and labels of the @Diamond symbol
+/lfigdiamond
+{
+ xsize 0 0.5 lfigpmul /S lfigpointdef
+ 0 ysize 0.5 lfigpmul /W lfigpointdef
+ S W lfigpadd /CTR lfigpointdef
+ CTR W lfigpadd /N lfigpointdef
+ CTR S lfigpadd /E lfigpointdef
+ [ xsize ysize 0.5 lfigpmul /lfigdiamondcircum cvx ] lfigcircumdef
+ S E N W S
+} def
+
+% shape and labels of the @Ellipse symbol
+/lfigellipse
+{
+ xsize 0 0.5 lfigpmul /S lfigpointdef
+ 0 ysize 0.5 lfigpmul /W lfigpointdef
+ S W lfigpadd /CTR lfigpointdef
+ CTR W lfigpadd /N lfigpointdef
+ CTR S lfigpadd /E lfigpointdef
+ CTR xsize 0 0.3536 lfigpmul lfigpadd 0 ysize 0.3536 lfigpmul lfigpadd /NE lfigpointdef
+ 0 ysize 0.3536 lfigpmul CTR xsize 0 0.3536 lfigpmul lfigpadd lfigpsub /SE lfigpointdef
+ xsize 0 0.3536 lfigpmul CTR lfigpsub 0 ysize 0.3536 lfigpmul lfigpadd /NW lfigpointdef
+ 0 ysize 0.3536 lfigpmul xsize 0 0.3536 lfigpmul CTR lfigpsub lfigpsub /SW lfigpointdef
+ [ xsize ysize 0.5 lfigpmul /lfigellipsecircum cvx ] lfigcircumdef
+ S [ CTR ] E [ CTR ] N [ CTR ] W [ CTR ] S
+} def
+
+% shape and labels of the @Circle symbol
+/lfigcircle
+{
+ xsize ysize 0.5 lfigpmul /CTR lfigpointdef
+ CTR xsize 0 ysize 0 lfigpmax 0.5 lfigpmul lfigpadd /E lfigpointdef
+ CTR 0 0 CTR E lfigdistance 45 lfigatangle lfigpadd /NE lfigpointdef
+ CTR 0 0 CTR E lfigdistance 90 lfigatangle lfigpadd /N lfigpointdef
+ CTR 0 0 CTR E lfigdistance 135 lfigatangle lfigpadd /NW lfigpointdef
+ CTR 0 0 CTR E lfigdistance 180 lfigatangle lfigpadd /W lfigpointdef
+ CTR 0 0 CTR E lfigdistance 225 lfigatangle lfigpadd /SW lfigpointdef
+ CTR 0 0 CTR E lfigdistance 270 lfigatangle lfigpadd /S lfigpointdef
+ CTR 0 0 CTR E lfigdistance 315 lfigatangle lfigpadd /SE lfigpointdef
+ [ S E lfigpsub /lfigellipsecircum cvx ] lfigcircumdef
+ S [ CTR ] E [ CTR ] N [ CTR ] W [ CTR ] S
+} def
+
+% shape and labels of the @HLine and @HArrow symbols
+/lfighline
+{
+ 0 ymark lfigprevious /FROM lfigpointdef
+ xsize ymark lfigprevious /TO lfigpointdef
+} def
+
+% shape and labels of the @VLine and @VArrow symbols
+/lfigvline
+{
+ xmark ysize lfigprevious /FROM lfigpointdef
+ xmark 0 lfigprevious /TO lfigpointdef
+} def
+
+% points of a polygon around base with given no of sides, vert init angle:
+% <sides> <angle> figpolygon <point> ... <point>
+/lfigpolygon
+{ xsize ysize 0.5 lfigpmul /CTR lfigpointdef
+ 90 sub CTR 2 copy lfigmax 5 3 roll
+ [ 4 copy pop /lfigpolycircum cvx ] lfigcircumdef
+ exch dup 360 exch div exch
+ 1 1 3 2 roll
+ { 4 string cvs (P) exch lfigconcat cvn
+ 6 copy pop pop lfigatangle 2 copy 10 2 roll
+ 3 2 roll lfigpointdef
+ dup 3 1 roll add exch
+ } for
+ pop lfigatangle
+} def
+
+% next array element: <array> <index> lfiggetnext <array> <index> <any> true
+% or <array> <index> false
+/lfiggetnext
+{ 2 copy exch length ge
+ { false }
+ { 2 copy get exch 1 add exch true } ifelse
+} def
+
+% check whether thing is number: <any> lfigisnumbertype <any> <bool>
+/lfigisnumbertype
+{ dup type dup
+ /integertype eq exch /realtype eq or
+} def
+
+% check whether thing is an array: <any> lfigisarraytype <any> <bool>
+/lfigisarraytype { dup type /arraytype eq } def
+
+% get next item: <array> <index> lfiggetnextitem <array> <index> 0
+% or <array> <index> <array> 1
+% or <array> <index> <point> 2
+/lfiggetnextitem
+{ lfiggetnext
+ { lfigisarraytype
+ { 1
+ }
+ { lfigisnumbertype
+ { 3 1 roll
+ lfiggetnext
+ { lfigisnumbertype
+ { 4 3 roll exch 2
+ }
+ { pop 3 2 roll pop 0
+ } ifelse
+ }
+ { 3 2 roll pop 0
+ } ifelse
+ }
+ { pop 0
+ } ifelse
+ } ifelse
+ }
+ { 0
+ } ifelse
+} def
+
+% set arc path: bool x1 y1 x2 y2 x0 y0 lfigsetarc <angle> <angle> <dist>
+% the path goes from x1 y1 to x2 y2 about centre x0 y0,
+% anticlockwise if bool is true else clockwise.
+% The orientations of backwards pointing and forwards pointing
+% arrowheads are returned in the two angles, and
+% the length of the arc is returned in <dist>.
+/lfigsetarc
+{
+ 20 dict begin
+ matrix currentmatrix 8 1 roll
+ 2 copy translate 2 copy 8 2 roll
+ 4 2 roll lfigpsub 6 2 roll lfigpsub
+ dup /y1 exch def dup mul /y1s exch def
+ dup /x1 exch def dup mul /x1s exch def
+ dup /y2 exch def dup mul /y2s exch def
+ dup /x2 exch def dup mul /x2s exch def
+
+ y1s y2s eq
+ { -1
+ }
+ { y1s x2s mul y2s x1s mul sub y1s y2s sub div
+ } ifelse
+ /da exch def
+
+ x1s x2s eq
+ { -1
+ }
+ { x1s y2s mul x2s y1s mul sub x1s x2s sub div
+ } ifelse
+ /db exch def
+
+ da 0 gt db 0 gt and
+ { /LMax da sqrt db sqrt lfigmax def
+ /scalex da sqrt LMax div def
+ /scaley db sqrt LMax div def
+ scalex scaley scale
+ 0 0 LMax
+ 0 0 x1 scalex mul y1 scaley mul lfigangle
+ 0 0 x2 scalex mul y2 scaley mul lfigangle
+ 2 copy eq { 360 add } if
+ 2 copy 8 2 roll
+ 5 index { arc } { arcn } ifelse
+ 2 index 1 index
+ { 90 sub } { 90 add } ifelse
+ dup sin scaley mul exch cos scalex mul atan
+ 2 index 2 index
+ { 90 add } { 90 sub } ifelse
+ dup sin scaley mul exch cos scalex mul atan
+ 5 2 roll % res1 res2 ang1 ang2 anticlockwise
+ { exch sub } { sub } ifelse
+ dup 0 le { 360 add } if lfigpi mul LMax mul 180 div
+ }
+ { 0 0 x1 y1 lfigdistance 0 0 x2 y2 lfigdistance eq
+ 0 0 x1 y1 lfigdistance 0 gt and
+ { 0 0
+ 0 0 x1 y1 lfigdistance
+ 0 0 x1 y1 lfigangle
+ 0 0 x2 y2 lfigangle
+ 2 copy eq { 360 add } if
+ 2 copy 8 2 roll
+ 5 index { arc } { arcn } ifelse
+ 2 index 1 index
+ { 90 sub } { 90 add } ifelse
+ 2 index 2 index
+ { 90 add } { 90 sub } ifelse
+ 5 2 roll % res1 res2 ang1 ang2 clockwise
+ { exch sub } { sub } ifelse
+ dup 0 le { 360 add } if lfigpi mul 0 0 x1 y1 lfigdistance mul 180 div
+ }
+ { x2 y2 lineto pop
+ x2 y2 x1 y1 lfigangle
+ x1 y1 x2 y2 lfigangle
+ x1 y1 x2 y2 lfigdistance
+ } ifelse
+ } ifelse
+ 4 -1 roll setmatrix
+ end
+} def
+
+% lfigsetcurve: set up a Bezier curve from x0 y0 to x3 y3
+% and return arrowhead angles and length of curve (actually 0)
+% x0 y0 x1 y1 x2 y2 x3 y3 lfigsetcurve <angle> <angle> <length>
+/lfigsetcurve
+{ 8 copy curveto pop pop
+ lfigangle
+ 5 1 roll
+ 4 2 roll lfigangle
+ exch
+ 0
+} def
+
+% lfigpaintpath: paint a path of the given shape
+% /paint [ shape ] lfigpaintpath -
+/lfigpaintpath
+{
+ 10 dict begin
+ 0 newpath
+ /prevseen false def
+ /curveseen false def
+ { lfiggetnextitem
+ dup 0 eq { pop exit }
+ { 1 eq
+ { /curveseen true def
+ /curve exch def
+ curve length 0 eq { /curveseen false def } if
+ }
+ { /ycurr exch def
+ /xcurr exch def
+ prevseen
+ { curveseen
+ { curve length 4 eq
+ { xprev yprev
+ curve 0 get curve 1 get
+ curve 2 get curve 3 get
+ xcurr ycurr
+ lfigsetcurve pop pop pop
+ }
+ { xprev yprev xcurr ycurr
+ curve length 1 ge { curve 0 get } { 0 } ifelse
+ curve length 2 ge { curve 1 get } { 0 } ifelse
+ curve length 3 ge { curve 2 get } { true } ifelse
+ 7 1 roll
+ lfigsetarc pop pop pop
+ } ifelse
+ }
+ { xcurr ycurr lineto
+ } ifelse
+ }
+ { xcurr ycurr moveto
+ } ifelse
+ /xprev xcurr def
+ /yprev ycurr def
+ /prevseen true def
+ /curveseen false def
+ } ifelse
+ } ifelse
+ } loop pop pop cvx exec
+ end
+} def
+
+% stroke a path of the given shape in the given linestyle and dash length.
+% Return the origin and angle of the backward and forward arrow heads.
+% dashlength /linestyle [shape] lfigdopath [<point> <angle>] [<point> <angle>]
+/lfigdopath
+{
+ 10 dict begin
+ 0
+ /prevseen false def
+ /curveseen false def
+ /backarrow [] def
+ /fwdarrow [] def
+ {
+ lfiggetnextitem
+ dup 0 eq { pop exit }
+ {
+ 1 eq
+ { /curveseen true def
+ /curve exch def
+ curve length 0 eq { /prevseen false def } if
+ }
+ { /ycurr exch def
+ /xcurr exch def
+ prevseen
+ { newpath xprev yprev moveto
+ curveseen
+ { curve length 4 eq
+ { xprev yprev
+ curve 0 get curve 1 get
+ curve 2 get curve 3 get
+ xcurr ycurr lfigsetcurve
+ }
+ { xprev yprev xcurr ycurr
+ curve length 1 ge { curve 0 get } { 0 } ifelse
+ curve length 2 ge { curve 1 get } { 0 } ifelse
+ curve length 3 ge { curve 2 get } { true } ifelse
+ 7 1 roll
+ lfigsetarc
+ } ifelse
+ }
+ { xcurr ycurr lineto
+ xcurr ycurr xprev yprev lfigangle dup 180 sub
+ xprev yprev xcurr ycurr lfigdistance
+ } ifelse
+ 6 index 6 index cvx exec
+ [ xprev yprev 5 -1 roll ]
+ backarrow length 0 eq
+ { /backarrow exch def }
+ { pop } ifelse
+ [ xcurr ycurr 4 -1 roll ] /fwdarrow exch def
+ } if
+ /xprev xcurr def
+ /yprev ycurr def
+ /prevseen true def
+ /curveseen false def
+ } ifelse
+ } ifelse
+ } loop
+ pop pop pop pop
+ backarrow length 0 eq { [ 0 0 0 ] } { backarrow } ifelse
+ fwdarrow length 0 eq { [ 0 0 0 ] } { fwdarrow } ifelse
+ end
+} def
+
+% lfigdoarrow: draw an arrow head of given form
+% dashlength /lstyle /pstyle hfrac height width [ <point> <angle> ] lfigdoarrow -
+/lfigdoarrow
+{ matrix currentmatrix 8 1 roll
+ dup 0 get 1 index 1 get translate
+ 2 get rotate
+ [ 2 index neg 2 index 0 0
+ 3 index 3 index neg
+ 1 index 10 index mul 0
+ 7 index 7 index ]
+ 4 1 roll pop pop pop
+ dup 3 1 roll
+ gsave lfigpaintpath grestore lfigdopath pop pop
+ setmatrix
+} def
+
+% arrow head styles
+/lfigopen 0.0 def
+/lfighalfopen 0.5 def
+/lfigclosed 1.0 def
+
+% stroke no arrows, forward, back, and both
+/lfignoarrow { pop pop pop pop pop pop pop pop } def
+/lfigforward { 7 -1 roll lfigdoarrow pop } def
+/lfigback { 8 -2 roll pop lfigdoarrow } def
+/lfigboth { 8 -1 roll 7 copy lfigdoarrow pop 7 -1 roll lfigdoarrow } def
+
+% lfigprevious: return previous point on path
+/lfigprevious
+{ lfigisnumbertype
+ { 2 copy }
+ { lfigisarraytype
+ { 2 index 2 index }
+ { 0 0 }
+ ifelse
+ } ifelse
+} def
+
+% label a point in 2nd top dictionary: <point> /name lfigpointdef -
+/lfigpointdef
+{
+ % (Entering lfigpointdef) lfigdebugprint
+ [ 4 2 roll transform
+ /itransform cvx ] cvx
+ currentdict end
+ 3 1 roll
+ % currentdict length currentdict maxlength lt
+ % { def }
+ % { exec moveto (too many labels) show stop }
+ % ifelse
+ def
+ begin
+ % (Leaving lfigpointdef) lfigdebugprint
+} def
+
+% promote labels from second top to third top dictionary
+% <string> lfigpromotelabels -
+/lfigpromotelabels
+{
+ % (Entering lfigpromotelabels) lfigdebugprint
+ currentdict end exch currentdict end
+ { exch 20 string cvs 2 index
+ (@) lfigconcat exch lfigconcat cvn exch def
+ } forall pop begin
+ % (Leaving lfigpromotelabels) lfigdebugprint
+} def
+
+% show labels (except CIRCUM): - lfigshowlabels -
+/lfigshowlabels
+{
+ % (Entering lfigshowlabels) lfigdebugprint
+ currentdict end
+ currentdict
+ { 1 index 20 string cvs (CIRCUM) search % if CIRCUM in key
+ { pop pop pop pop pop }
+ { pop cvx exec 2 copy
+ newpath 1.5 pt 0 360 arc
+ 0 setgray fill
+ /Times-Roman findfont 8 pt scalefont setfont
+ moveto 0.2 cm 0.1 cm rmoveto 20 string cvs show
+ }
+ ifelse
+ } forall
+ begin
+ % (Leaving lfigshowlabels) lfigdebugprint
+} def
+
+% fix an angle to 0 <= res < 360: <angle> lfigfixangle <angle>
+/lfigfixangle
+{
+ % (Entering lfigfixangle) lfigdebugprint
+ { dup 0 ge { exit } if
+ 360 add
+ } loop
+ { dup 360 lt { exit } if
+ 360 sub
+ } loop
+ % (Leaving lfigfixangle) lfigdebugprint
+} def
+
+% find point on circumference of box: alpha a b lfigboxcircum x y
+/lfigboxcircum
+{
+ % (Entering lfigboxcircum) lfigdebugprint
+ 4 dict begin
+ /b exch def
+ /a exch def
+ lfigfixangle /alpha exch def
+ 0 0 a b lfigangle /theta exch def
+
+ % if alpha <= theta, return (a, a*tan(alpha))
+ alpha theta le
+ { a a alpha sin mul alpha cos div }
+ {
+ % else if alpha <= 180 - theta, return (b*cot(alpha), b)
+ alpha 180 theta sub le
+ { b alpha cos mul alpha sin div b }
+ {
+ % else if alpha <= 180 + theta, return (-a, -a*tan(alpha))
+ alpha 180 theta add le
+ { a neg a neg alpha sin mul alpha cos div }
+ {
+ % else if alpha <= 360 - theta, return (-b*cot(alpha), -b)
+ alpha 360 theta sub le
+ { b neg alpha cos mul alpha sin div b neg }
+ {
+ % else 360 - theta <= alpha, return (a, a*tan(alpha))
+ a a alpha sin mul alpha cos div
+ } ifelse
+ } ifelse
+ } ifelse
+ } ifelse
+ end
+ % (Leaving lfigboxcircum) lfigdebugprint
+} def
+
+% find quadratic roots (assume a != 0): a b c lfigqroots x1 x2 2
+% or x2 1
+% or 0
+/lfigqroots
+{
+ 4 dict begin
+ /c exch def
+ /b exch def
+ /a exch def
+ /disc b b mul 4 a c mul mul sub def
+ disc 0 lt
+ { 0
+ }
+ { disc 0 eq
+ { b neg 2 a mul div
+ 1
+ }
+ { b neg disc sqrt add 2 a mul div
+ b neg disc sqrt sub 2 a mul div
+ 2
+ }
+ ifelse
+ }
+ ifelse
+ end
+} def
+
+% work our which quadrant: <angle> lfigquadrant <0-3>
+/lfigquadrant
+{ dup 90 lt
+ { pop 0
+ }
+ { dup 180 lt
+ { pop 1
+ }
+ { 270 lt
+ { 2
+ }
+ { 3
+ } ifelse
+ } ifelse
+ } ifelse
+} def
+
+% find curvebox circum, assuming upper right quadrant: alpha a b xmk lfigcb x y
+/lfigcb
+{
+ 6 dict begin
+ /xmk exch def
+ /b exch def
+ /a exch def
+ /alpha exch def
+ /theta1 0 0 a b xmk sub lfigangle def
+ /theta2 0 0 a xmk sub b lfigangle def
+ alpha theta1 le
+ { % if alpha <= theta1, return (a, a*tan(alpha))
+ a a alpha sin mul alpha cos div
+ }
+ { alpha theta2 ge
+ { % else if alpha > theta2, return (b*cot(alpha), b)
+ b alpha cos mul alpha sin div b
+ }
+ {
+ % else, return the intersection of line and circle
+ a xmk sub b xmk sub xmk 0 0 alpha lfigcircleintersect
+ dup 0 eq
+ { % should never happen, just return any reasonable point
+ pop
+ a b 0.5 lfigpmul
+ }
+ { 1 eq
+ { % should never happen, just return the point on top of stack
+ }
+ { % the usual case, two points on stack, return the larger
+ lfigpmax
+ } ifelse
+ } ifelse
+ } ifelse
+ } ifelse
+ end
+} def
+
+% find point on circumference of curvebox: alpha a b xmk lfigcurveboxcircum x y
+/lfigcurveboxcircum
+{
+ % (Entering lfigcurveboxcircum) lfigdebugprint
+ 5 dict begin
+ /xmk exch def
+ /b exch def
+ /a exch def
+ lfigfixangle /alpha exch def
+
+ % work out which quadrant we are in, and reflect accordingly
+ /quad alpha lfigquadrant def
+ quad 0 eq
+ { alpha a b xmk lfigcb
+ }
+ { quad 1 eq
+ { 180 alpha sub a b xmk lfigcb exch neg exch
+ }
+ { quad 2 eq
+ { alpha 180 sub a b xmk lfigcb neg exch neg exch
+ }
+ { 360 alpha sub a b xmk lfigcb neg
+ } ifelse
+ } ifelse
+ } ifelse
+ end
+ % (Leaving lfigcurveboxcircum) lfigdebugprint
+} def
+
+% find point on circumference of diamond: alpha a b lfigdiamondcircum x y
+/lfigdiamondcircum
+{
+ % (Entering lfigdiamondcircum) lfigdebugprint
+ 4 dict begin
+ /b exch def
+ /a exch def
+ lfigfixangle /alpha exch def
+ b alpha cos abs mul a alpha sin abs mul add /denom exch def
+ a b mul alpha cos mul denom div
+ a b mul alpha sin mul denom div
+ end
+ % (Leaving lfigdiamondcircum) lfigdebugprint
+} def
+
+% find point on circumference of ellipse: alpha a b lfigellipsecircum x y
+/lfigellipsecircum
+{
+ % (Entering lfigellipsecircum) lfigdebugprint
+ 4 dict begin
+ /b exch def
+ /a exch def
+ lfigfixangle /alpha exch def
+ b alpha cos mul dup mul a alpha sin mul dup mul add sqrt /denom exch def
+ a b mul alpha cos mul denom div
+ a b mul alpha sin mul denom div
+ end
+ % (Leaving lfigellipsecircum) lfigdebugprint
+} def
+
+% find point of intersection of two lines each defined by two points
+% x1 y1 x2 y2 x3 y3 x4 y4 lfiglineintersect x y
+/lfiglineintersect
+{
+ % (Entering lfiglineintersect) lfigdebugprint
+ 13 dict begin
+ /y4 exch def
+ /x4 exch def
+ /y3 exch def
+ /x3 exch def
+ /y2 exch def
+ /x2 exch def
+ /y1 exch def
+ /x1 exch def
+ x2 x1 sub /x21 exch def
+ x4 x3 sub /x43 exch def
+ y2 y1 sub /y21 exch def
+ y4 y3 sub /y43 exch def
+ y21 x43 mul y43 x21 mul sub /det exch def
+
+ % calculate x
+ y21 x43 mul x1 mul
+ y43 x21 mul x3 mul sub
+ y3 y1 sub x21 mul x43 mul add
+ det div
+
+ % calculate y
+ x21 y43 mul y1 mul
+ x43 y21 mul y3 mul sub
+ x3 x1 sub y21 mul y43 mul add
+ det neg div
+
+ end
+ % (Leaving lfiglineintersect) lfigdebugprint
+} def
+
+% find point on circumference of polygon
+% alpha radius num theta lfigpolycircum x y
+/lfigpolycircum
+{
+ % (Entering lfigpolycircum) lfigdebugprint
+ 13 dict begin
+ /theta exch def
+ /num exch def
+ /radius exch def
+ /alpha exch def
+
+ % calculate delta, the angle from theta to alpha
+ alpha theta sub lfigfixangle
+
+ % calculate the angle which is the multiple of 360/num closest to delta
+ 360 num div div truncate 360 num div mul theta add /anglea exch def
+
+ % calculate the next multiple of 360/num after anglea
+ anglea 360 num div add /angleb exch def
+
+ % intersect the line through these two points with the alpha line
+ anglea cos anglea sin angleb cos angleb sin
+ 0 0 alpha cos 2 mul alpha sin 2 mul
+ lfiglineintersect radius lfigpmul
+
+ end
+ % (Leaving lfigpolycircum) lfigdebugprint
+} def
+
+% find point of intersection of a point and a circle
+% x0 y0 r x1 y1 theta lfigcircleintersect xa ya xb yb 2
+% or xb yb 1
+% or 0
+/lfigcircleintersect
+{
+ % (Entering lfigcircleintersect) lfigdebugprint
+ 15 dict begin
+ /theta exch def
+ /y1 exch def
+ /x1 exch def
+ /r exch def
+ /y0 exch def
+ /x0 exch def
+
+ % if sin(theta) = 0 then line is horizontal and y must be y1
+ theta sin abs 0.00001 lt
+ {
+ /a 1 def
+ /b -2 x0 mul def
+ /c x0 dup mul y1 y0 sub dup mul add r dup mul sub def
+ a b c lfigqroots dup
+ 0 eq
+ { pop
+ 0
+ }
+ { 1 eq
+ { y1 1
+ }
+ { y1 exch y1 2
+ } ifelse
+ } ifelse
+ }
+ {
+ /ct theta cos theta sin div def
+ /a ct ct mul 1 add def
+ /b ct x1 x0 sub mul y1 add y0 sub 2 mul def
+ /c x1 x0 sub dup mul y1 y0 sub dup mul add r dup mul sub def
+ a b c lfigqroots dup
+ 0 eq
+ { pop
+ 0
+ }
+ { 1 eq
+ { y1 add /yb exch def
+ yb y1 sub ct mul x1 add /xb exch def
+ xb yb 1
+ }
+ { y1 add /ya exch def
+ ya y1 sub ct mul x1 add /xa exch def
+ y1 add /yb exch def
+ yb y1 sub ct mul x1 add /xb exch def
+ xa ya xb yb 2
+ } ifelse
+ } ifelse
+ } ifelse
+ end
+ % (Leaving lfigcircleintersect) lfigdebugprint
+} def
+
+% add CIRCUM operator with this body: <array> lfigcircumdef -
+/lfigcircumdef
+{ % (Entering lfigcircumdef) lfigdebugprint
+ /CIRCUM exch cvx
+ currentdict end
+ 3 1 roll
+ % currentdict length currentdict maxlength lt
+ % { def }
+ % { exec moveto (too many labels) show stop }
+ % ifelse
+ def
+ begin
+ % (Leaving lfigcircumdef) lfigdebugprint
+} def
+
+end
+%%EndResource
+
+%%BeginResource: procset LoutBasicSetup
+% @PrependGraphic file /export/home/6monthspace/jeff/lout.lib/include/bsf.lpg
+
+% width height linethickness louteuro -
+% draw a Euro symbol of this width and height with this line thickness
+/louteuro {
+ 20 dict begin
+ /eurothick exch def
+ /euroheight exch def
+ /eurowidth exch def
+ /eurostrokewidth euroheight 0.8 mul def
+ /eurostep eurothick 60 cos mul 60 sin div def
+ /eurotheta 40 def
+
+ % llx lly width thickness louteurobox -
+ % draw angled box starting at (llx, lly) with given width and thickness
+ /louteurobox
+ {
+ /euroboxthick exch def
+ /euroboxwidth exch def
+ newpath moveto euroboxwidth 0 rlineto
+ eurostep euroboxthick rlineto
+ euroboxwidth neg 0 rlineto closepath fill
+ } def
+
+ % lower cross stroke
+ 0 euroheight 2 div eurothick 1.5 mul sub
+ eurostrokewidth eurothick louteurobox
+
+ % upper cross stroke
+ 0 euroheight 2 div eurothick 0.5 mul add
+ eurostrokewidth eurostep 2 mul add eurothick louteurobox
+
+ % circular part
+ /eurohctr eurowidth euroheight 2 div eurotheta cos mul sub def
+ /eurovctr euroheight 2 div def
+ newpath
+ eurohctr eurovctr eurovctr eurotheta 350 eurotheta sub arc
+ eurohctr eurovctr eurovctr eurothick sub 365 eurotheta sub eurotheta arcn
+ closepath fill
+ end
+} def
+
+% path for @FullWidthRule symbol
+/LoutRule
+{ 0 0 moveto xsize 0 lineto
+} def
+
+% path for @Box symbol
+/LoutBox
+{ 0 0 moveto xsize 0 lineto
+ xsize ysize lineto 0 ysize lineto
+ closepath
+} def
+
+% path for @CurveBox symbol
+/LoutCurveBox
+{ xmark 0 moveto
+ xsize xmark sub xmark xmark 270 360 arc
+ xsize xmark sub ysize xmark sub xmark 0 90 arc
+ xmark ysize xmark sub xmark 90 180 arc
+ xmark xmark xmark 180 270 arc
+ closepath
+} def
+
+% path for @ShadowBox symbol
+/LoutShadowBox
+{ xmark 2 mul 0 moveto xsize 0 lineto
+ xsize ysize xmark 2 mul sub lineto
+ xsize xmark sub ysize xmark 2 mul sub lineto
+ xsize xmark sub xmark lineto
+ xmark 2 mul xmark lineto
+ closepath
+} def
+
+% set up dictionary containing margin note data: parity LoutMargSet -
+/LoutMargSet
+{ /LoutMargDict 12 dict def
+ LoutMargDict begin
+ /parity exch def
+ /matr matrix currentmatrix def
+ /rightx xsize def
+ /lefty ysize def % highest allowable point for top of next left note
+ /righty ysize def % highest allowable point for top of next right note
+ /max { 2 copy gt { pop } { exch pop } ifelse } def
+ /min { 2 copy lt { pop } { exch pop } ifelse } def
+ end
+} def
+
+%translate coordinate system for marginal notes: type LoutMargShift -
+% where type 0 is left margin, 1 is right margin, 2 is outer, 3 is inner
+/LoutMargShift
+{ LoutMargDict begin
+
+ % y coordinate of top of note, in margin coords, before vertical adjust
+ 0 ysize transform matr itransform exch pop
+
+ % decide whether left or right margin based on type and parity
+ exch [ 0 1 parity 1 parity sub ] exch get 0 eq
+ {
+ % left margin: adjust top of note downwards if overlaps previous note
+ lefty min
+
+ % bottom of note is new lefty position and also translate position
+ ysize sub dup /lefty exch def
+
+ % want right edge of note at coordinate zero
+ xsize neg exch
+ }
+ {
+ % right margin: adjust top of note downwards if overlaps previous note
+ righty min
+
+ % bottom of note is new righty position and also translate position
+ ysize sub dup /righty exch def
+
+ % want left edge of note at coordinate rightx
+ rightx exch
+ } ifelse
+
+ % stack now contains coord of bottom left corner in margin coordinates
+ matr setmatrix translate
+ end
+} def
+
+% create LoutPageDict with left, right, foot, top for @Place symbol users
+/LoutPageSet
+{
+ /LoutPageDict 5 dict def
+ LoutPageDict begin
+ /matr matrix currentmatrix def
+ /left 0 def
+ /right xsize def
+ /foot 0 def
+ /top ysize def
+ end
+
+} def
+
+%%EndResource
+
+%%EndProlog
+
+%%BeginSetup
+%%IncludeResource: font Times-Roman
+/Times-Romanfnt82 vec2 /Times-Roman LoutRecode
+/fnt82 { /Times-Romanfnt82 LoutFont } def
+%%IncludeResource: font Helvetica
+/Helveticafnt35 vec2 /Helvetica LoutRecode
+/fnt35 { /Helveticafnt35 LoutFont } def
+%%IncludeResource: font Symbol
+/fnt78 { /Symbol LoutFont } def
+%%IncludeResource: font Helvetica-Oblique
+/Helvetica-Obliquefnt36 vec2 /Helvetica-Oblique LoutRecode
+/fnt36 { /Helvetica-Obliquefnt36 LoutFont } def
+%%EndSetup
+
+%%Page: i 1
+%%BeginPageSetup
+%%PageResources: font Times-Roman
+%%+ font Helvetica
+%%+ font Symbol
+%%+ font Helvetica-Oblique
+/pgsave save def
+0.0500 dup scale 10 setlinewidth
+%%EndPageSetup
+
+gsave
+0 0 translate
+240 fnt82 0.0 0.0 0.0 setrgbcolor 11900 16840 0 16840 240 288 60 LoutGraphic
+gsave
+LoutPageSet
+grestore
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+1 LoutMargSet
+grestore
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+grestore
+
+grestore
+
+grestore
+
+pgsave restore
+showpage
+
+%%Page: ii 2
+%%BeginPageSetup
+%%PageResources: font Times-Roman
+%%+ font Times-Bold
+/pgsave save def
+%%IncludeResource: font Times-Bold
+/Times-Boldfnt84 vec2 /Times-Bold LoutRecode
+/fnt84 { /Times-Boldfnt84 LoutFont } def
+0.0500 dup scale 10 setlinewidth
+%%EndPageSetup
+gsave
+0 0 translate
+240 fnt82 0.0 0.0 0.0 setrgbcolor 11900 16840 0 16840 240 288 60 LoutGraphic
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+240 fnt84 0 13840(96)m 240 fnt83 8539 13843(Inde)m 4(x)k
+220 fnt35 0 13245(@Under)m -3(line)k 240 fnt82 1215 13248(symbol)m
+1922(,)s 2029(69)s 0 12960(Underscore)m 1158(character)s 2039(,)s
+2146(13)s 220 fnt35 0 12669(@Use)m 240 fnt82 665 12672(symbol)m
+1372(,)s 1479(62)s 220 fnt35 0 12093(v)m 240 fnt82
+169 12096(unit)m 548(,)s 655(37)s 240 11808(ef)m 6(fect)k
+836(on)s 1133(paragraph)s 2146(breaking)s 2983(,)s 3090(42)s
+220 fnt35 0 11517(@V)m 17(Adjust)k 240 fnt82 1017 11520(symbol)m
+1724(,)s 1831(49)s 220 fnt35 0 11229(@VContr)m 2(act)k
+240 fnt82 1252 11232(symbol)m 1959(,)s 2066(49)s 220 fnt35
+0 10941(@VCo)m 3(v)k 5(er)k 240 fnt82 1006 10944(symbol)m
+1713(,)s 1820(50)s 220 fnt35 0 10653(@V)m 17(erbatim)k
+240 fnt82 1129 10656(symbol)m 1836(,)s 1943(69)s 0 10368(V)m 26(ertical)k
+797(concatenation)s 2129(,)s 2236(36)s 220 fnt35 0 10077(@VExpand)m
+240 fnt82 1161 10080(symbol)m 1868(,)s 1975(48)s 220 fnt35
+0 9789(@VLimited)m 240 fnt82 1123 9792(symbol)m 1830(,)s 1937(49)s
+220 fnt35 0 9501(@VScale)m 240 fnt82 969 9504(symbol)m 1676(,)s
+1783(50)s 220 fnt35 0 9213(@VShift)m 240 fnt82 863 9216(symbol)m
+1570(,)s 1677(48)s 220 fnt35 0 8925(@VSpan)m 240 fnt82
+927 8928(symbol)m 1634(,)s 1741(51)s 220 fnt35 0 8349(w)m
+240 fnt82 216 8352(unit)m 595(,)s 702(37)s 0 8064(White)m
+640(space)s 1174(,)s 1281(13)s 240 7776(when)m 816(signi\207cant)s
+1819(,)s 1926(38)s 220 fnt35 0 7485(@Wide)m 240 fnt82
+774 7488(symbol)m 1481(,)s 1588(48)s 0 7200(W)m 9(idth)k
+646(of)s 917(an)s 1200(object)s 1791(,)s 1898(24)s
+0 6912(W)m 19(ord)k 531(,)s 638(14)s 220 fnt35
+0 6333(x)m 240 fnt82 168 6336(g)m 1(ap)k 566(mode)s
+1101(,)s 1208(37)s 220 fnt35 0 5757(@Y)m 4(ield)k
+240 fnt82 753 5760(symbol)m 1460(,)s 1567(56)s 220 fnt35
+0 5469(@YUnit)m 240 fnt82 814 5472(symbol)m 1521(,)s 1628(44)s
+220 fnt35 0 4893(@ZUnit)m 240 fnt82 802 4896(symbol)m 1509(,)s
+1616(44)s
+grestore
+
+grestore
+
+grestore
+
+pgsave restore
+showpage
+
+%%Trailer
+%%DocumentNeededResources: font Helvetica
+%%+ font Helvetica-Oblique
+%%+ font Symbol
+%%+ font Times-Roman
+%%+ font Times-Italic
+%%+ font Times-Bold
+%%+ font Times-BoldItalic
+%%DocumentSuppliedResources: procset LoutStartUp
+%%+ procset LoutTabPrependGraphic
+%%+ procset LoutFigPrependGraphic
+%%+ procset LoutBasicSetup
+%%+ encoding vec2
+%%Pages: 102
+%%EOF
diff --git a/doc/expert/preface b/doc/expert/preface
index 826487f..5dae00b 100644
--- a/doc/expert/preface
+++ b/doc/expert/preface
@@ -21,7 +21,7 @@ This manual presents Version 3 of Basser Lout, publicly released in
September 1994 @Cite { $kingston1995lout.program }. This manual was
rendered into PostScript
postscript @Index { PostScript }
-by Version 3.19 of the Basser Lout interpreter, using the symbols
+by Version 3.20 of the Basser Lout interpreter, using the symbols
described in the User's Guide @Cite { $kingston1995lout.user }.
@DP
@Heading { Acknowledgment. } Version 3 has benefited from hundreds of
diff --git a/doc/slides/README b/doc/slides/README
index 9279092..acbd629 100644
--- a/doc/slides/README
+++ b/doc/slides/README
@@ -15,4 +15,4 @@ after the second run. A copy of the final
outfile.ps is included.
Jeff Kingston
-9 March 2000
+8 April 2000
diff --git a/doc/slides/all b/doc/slides/all
index 98c7d6c..6e5f02e 100644
--- a/doc/slides/all
+++ b/doc/slides/all
@@ -500,7 +500,7 @@ begin
DoPriAbstract(root^.rightchild);
end;
end;
-} &0io
+} |0io
}
@End @Overhead
diff --git a/doc/slides/outfile.ps b/doc/slides/outfile.ps
new file mode 100644
index 0000000..5a8bd75
--- /dev/null
+++ b/doc/slides/outfile.ps
@@ -0,0 +1,4473 @@
+%!PS-Adobe-3.0
+%%Creator: Basser Lout Version 3.20 (April 2000)
+%%CreationDate: Sat Apr 8 14:54:15 2000
+%%DocumentData: Binary
+%%DocumentNeededResources: (atend)
+%%DocumentSuppliedResources: (atend)
+%%DocumentMedia: A4 595 842 0 white ()
+%%PageOrder: Ascend
+%%Pages: (atend)
+%%BoundingBox: 0 0 595 842
+%%EndComments
+
+%%BeginProlog
+%%BeginResource: procset LoutStartUp
+/m { 3 1 roll moveto show } bind def
+/mo { 3 1 roll moveto true charpath stroke } bind def
+/s { exch currentpoint exch pop moveto show } bind def
+/so { exch currentpoint exch pop moveto true charpath stroke } bind def
+/k { exch neg 0 rmoveto show } bind def
+/ko { exch neg 0 rmoveto true charpath stroke } bind def
+/ul { gsave setlinewidth dup 3 1 roll
+ moveto lineto stroke grestore } bind def
+/in { 1440 mul } def
+/cm { 567 mul } def
+/pt { 20 mul } def
+/em { 120 mul } def
+/sp { louts mul } def
+/vs { loutv mul } def
+/ft { loutf mul } def
+/dg { } def
+
+/LoutGraphic {
+ /louts exch def
+ /loutv exch def
+ /loutf exch def
+ /ymark exch def
+ /xmark exch def
+ /ysize exch def
+ /xsize exch def
+} def
+
+/LoutGr2 { gsave translate LoutGraphic gsave } def
+
+/LoutFont
+{ findfont exch scalefont setfont
+} bind def
+
+/LoutRecode {
+ { findfont dup length dict begin
+ {1 index /FID ne {def} {pop pop} ifelse} forall
+ /Encoding exch def
+ currentdict end definefont pop
+ }
+ stopped pop
+} bind def
+
+/BeginEPSF {
+ /LoutEPSFState save def
+ /dict_count countdictstack def
+ /op_count count 1 sub def
+ userdict begin
+ /showpage { } def
+ 0 setgray 0 setlinecap
+ 1 setlinewidth 0 setlinejoin
+ 10 setmiterlimit [] 0 setdash newpath
+ /languagelevel where
+ { pop languagelevel
+ 1 ne
+ { false setstrokeadjust false setoverprint
+ } if
+ } if
+} bind def
+
+/EndEPSF {
+ count op_count sub { pop } repeat
+ countdictstack dict_count sub { end } repeat
+ LoutEPSFState restore
+} bind def
+%%EndResource
+
+%%BeginResource: encoding vec2
+/vec2 [
+/.notdef /.notdef /.notdef /.notdef /.notdef /.notdef /.notdef /.notdef
+/.notdef /.notdef /.notdef /.notdef /.notdef /.notdef /.notdef /.notdef
+/.notdef /.notdef /.notdef /.notdef /.notdef /.notdef /.notdef /.notdef
+/.notdef /.notdef /.notdef /.notdef /.notdef /.notdef /.notdef /.notdef
+/space /exclam /quotedbl /numbersign /dollar /percent /ampersand /quoteright
+/parenleft /parenright /asterisk /plus /comma /hyphen /period /slash
+/zero /one /two /three /four /five /six /seven
+/eight /nine /colon /semicolon /less /equal /greater /question
+/at /A /B /C /D /E /F /G
+/H /I /J /K /L /M /N /O
+/P /Q /R /S /T /U /V /W
+/X /Y /Z /bracketleft /backslash /bracketright /asciicircum /underscore
+/quoteleft /a /b /c /d /e /f /g
+/h /i /j /k /l /m /n /o
+/p /q /r /s /t /u /v /w
+/x /y /z /braceleft /bar /braceright /asciitilde /.notdef
+/quotesinglbase /quotedblbase /ellipsis /OE /oe /quotedblleft /quotedblright /fi
+/fl /endash /emdash /bullet /dagger /daggerdbl /florin /fraction
+/dotlessi /grave /acute /circumflex /tilde /macron /breve /dotaccent
+/dieresis /.notdef /ring /cedilla /.notdef /hungarumlaut /ogonek /caron
+/space /exclamdown /cent /sterling /currency /yen /brokenbar /section
+/dieresis /copyright /ordfeminine /guillemotleft /logicalnot /hyphen /registered /macron
+/degree /plusminus /twosuperior /threesuperior /acute /mu /paragraph /periodcentered
+/cedilla /onesuperior /ordmasculine /guillemotright /onequarter /onehalf /threequarters /questiondown
+/Agrave /Aacute /Acircumflex /Atilde /Adieresis /Aring /AE /Ccedilla
+/Egrave /Eacute /Ecircumflex /Edieresis /Igrave /Iacute /Icircumflex /Idieresis
+/Eth /Ntilde /Ograve /Oacute /Ocircumflex /Otilde /Odieresis /multiply
+/Oslash /Ugrave /Uacute /Ucircumflex /Udieresis /Yacute /Thorn /germandbls
+/agrave /aacute /acircumflex /atilde /adieresis /aring /ae /ccedilla
+/egrave /eacute /ecircumflex /edieresis /igrave /iacute /icircumflex /idieresis
+/eth /ntilde /ograve /oacute /ocircumflex /otilde /odieresis /divide
+/oslash /ugrave /uacute /ucircumflex /udieresis /yacute /thorn /ydieresis
+] def
+%%EndResource
+
+%%BeginResource: procset LoutTabPrependGraphic
+% @PrependGraphic file /export/home/6monthspace/jeff/lout.lib/include/tabf.lpg
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+% %
+% PostScript @SysPrependGraphic file for @Tab %
+% %
+% To assist in avoiding name clashes, the names %
+% of all these symbols begin with "ltab". %
+% %
+% Jeffrey H. Kingston %
+% 24 September 1991 %
+% 22 December 1992 %
+% %
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+% linewidth ltabhs -
+% horizontal single line
+/ltabhs
+{ 0 0 moveto xsize 0 lineto
+ setlinewidth 0 setlinecap stroke
+} def
+
+% linewidth ltabhsp -
+% horizontal single line with projecting ends
+/ltabhsp
+{ 0 0 moveto xsize 0 lineto
+ setlinewidth 2 setlinecap stroke
+} def
+
+% linewidth ltabhd -
+% horizontal double line
+/ltabhd
+{ dup dup
+ 0 0 moveto xsize 0 lineto
+ 0 exch 3 mul moveto xsize exch 3 mul lineto
+ setlinewidth 0 setlinecap stroke
+} def
+
+% linewidth ltabhdb -
+% horizontal double line below mark
+/ltabhdb
+{ dup dup
+ 0 0 moveto xsize 0 lineto
+ 0 exch -3 mul moveto xsize exch -3 mul lineto
+ setlinewidth 0 setlinecap stroke
+} def
+
+% linewidth ltabhdnw -
+% horizontal double line with northwest corner
+/ltabhdnw
+{ dup dup dup dup
+ 0 0 moveto xsize 0 lineto
+ xsize exch 3 mul moveto
+ -3 mul exch 3 mul lineto
+ -3 mul 0 lineto
+ setlinewidth 0 setlinejoin 2 setlinecap stroke
+} def
+
+% linewidth ltabhdne -
+% horizontal double line with northeast corner
+/ltabhdne
+{ dup dup dup dup
+ 0 0 moveto xsize 0 lineto
+ 0 exch 3 mul moveto
+ 3 mul xsize add exch 3 mul lineto
+ 3 mul xsize add 0 lineto
+ setlinewidth 0 setlinejoin 2 setlinecap stroke
+} def
+
+% linewidth ltabhdsw -
+% horizontal double line with southwest corner
+/ltabhdsw
+{ dup dup dup dup
+ 0 0 moveto xsize 0 lineto
+ xsize exch -3 mul moveto
+ -3 mul exch -3 mul lineto
+ -3 mul 0 lineto
+ setlinewidth 0 setlinejoin 2 setlinecap stroke
+} def
+
+% linewidth ltabhdse -
+% horizontal double line with southeast corner
+/ltabhdse
+{ dup dup dup dup
+ 0 0 moveto xsize 0 lineto
+ 0 exch -3 mul moveto
+ 3 mul xsize add exch -3 mul lineto
+ 3 mul xsize add 0 lineto
+ setlinewidth 0 setlinejoin 2 setlinecap stroke
+} def
+
+% linewidth ltabvs -
+% vertical single line
+/ltabvs
+{ 0 0 moveto 0 ysize lineto
+ setlinewidth 0 setlinecap stroke
+} def
+
+% linewidth ltabvd -
+% vertical double line
+/ltabvd
+{ dup dup
+ 0 0 moveto 0 ysize lineto
+ -3 mul 0 moveto -3 mul ysize lineto
+ setlinewidth 0 setlinecap stroke
+} def
+
+% linewidth ltabvdr -
+% vertical double line to right of mark
+/ltabvdr
+{ dup dup
+ 0 0 moveto 0 ysize lineto
+ 3 mul 0 moveto 3 mul ysize lineto
+ setlinewidth 0 setlinecap stroke
+} def
+%%EndResource
+
+%%BeginResource: procset LoutFigPrependGraphic
+% @PrependGraphic file /export/home/6monthspace/jeff/lout.lib/include/figf.lpg
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+% %
+% PostScript @SysPrependGraphic file for @Fig Jeffrey H. Kingston %
+% Version 2.0 (includes CIRCUM label) January 1992 %
+% %
+% To assist in avoiding name clashes, the names of all symbols %
+% defined here begin with "lfig". However, this is not feasible %
+% with user-defined labels and some labels used by users. %
+% %
+% <point> is two numbers, a point. %
+% <length> is one number, a length %
+% <angle> is one number, an angle in degrees %
+% <dashlength> is one number, the preferred length of a dash %
+% %
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+errordict begin
+ /handleerror
+ {
+ { /Times-Roman findfont 8 pt scalefont setfont
+ 0 setgray 4 pt 4 pt moveto
+ $error /errorname get
+ dup lfigdict exch known
+ { lfigdict exch get }
+ { 30 string cvs } ifelse
+ show
+ ( Command: ) show
+ $error /command get 30 string cvs show
+ } stopped {} if
+ showpage stop
+ } def
+end
+
+% concat strings: <string> <string> lfigconcat <string>
+% must be defined outside lfigdict since used in lfigpromotelabels
+/lfigconcat
+{ 2 copy length exch length add string
+ dup 0 4 index putinterval
+ dup 3 index length 3 index putinterval
+ 3 1 roll pop pop
+} def
+
+% <string> lfigdebugprint -
+% must be defined outside lfigdict since used in arbitrary places
+% /lfigdebugprint
+% { print
+% (; operand stack:\n) print
+% count copy
+% count 2 idiv
+% { ==
+% (\n) print
+% } repeat
+% (\n) print
+% } def
+
+/lfigdict 120 dict def
+lfigdict begin
+
+% error messages
+/dictfull (dictfull error: too many labels?) def
+/dictstackoverflow (dictstackoverflow error: labels nested too deeply?) def
+/execstackoverflow (execstackoverflow error: figure nested too deeply?) def
+/limitcheck (limitcheck error: figure nested too deeply or too large?) def
+/syntaxerror (syntaxerror error: syntax error in text of figure?) def
+/typecheck (typecheck error: syntax error in text of figure?) def
+/undefined (undefined error: unknown or misspelt label?) def
+/VMError (VMError error: run out of memory?) def
+
+% push pi onto stack: - lfigpi <num>
+/lfigpi 3.14159 def
+
+% arc directions
+/clockwise false def
+/anticlockwise true def
+
+% maximum of two numbers: <num> <num> lfigmax <num>
+/lfigmax { 2 copy gt { pop } { exch pop } ifelse } def
+
+% minimum of two numbers: <num> <num> lfigmin <num>
+/lfigmin { 2 copy lt { pop } { exch pop } ifelse } def
+
+% add two points: <point> <point> lfigpadd <point>
+/lfigpadd { exch 3 1 roll add 3 1 roll add exch } def
+
+% subtract first point from second: <point> <point> lfigpsub <point>
+/lfigpsub { 3 2 roll sub 3 1 roll exch sub exch } def
+
+% max two points: <point> <point> lfigpmax <point>
+/lfigpmax { exch 3 1 roll lfigmax 3 1 roll lfigmax exch } def
+
+% min two points: <point> <point> lfigpmin <point>
+/lfigpmin { exch 3 1 roll lfigmin 3 1 roll lfigmin exch } def
+
+% scalar multiplication: <point> <num> lfigpmul <point>
+/lfigpmul { dup 3 1 roll mul 3 1 roll mul exch } def
+
+% point at angle and distance: <point> <length> <angle> lfigatangle <point>
+/lfigatangle { 2 copy cos mul 3 1 roll sin mul lfigpadd } def
+
+% angle from one point to another: <point> <point> lfigangle <angle>
+/lfigangle { lfigpsub 2 copy 0 eq exch 0 eq and {pop} {exch atan} ifelse } def
+
+% distance between two points: <point> <point> lfigdistance <length>
+/lfigdistance { lfigpsub dup mul exch dup mul add sqrt } def
+
+% difference in x coords: <point> <point> lfigxdistance <length>
+/lfigxdistance { pop 3 1 roll pop sub } def
+
+%difference in y coords: <point> <point> lfigydistance <length>
+/lfigydistance { 3 1 roll pop sub exch pop } def
+
+% stroke a solid line: <length> <dashlength> lfigsolid -
+/lfigsolid
+{ pop pop [] 0 setdash stroke
+} def
+
+% stroke a lfigdashed line: <length> <dashlength> lfigdashed -
+/lfigdashed
+{ 2 copy div 2 le 1 index 0 le or
+ { exch pop 1 pt lfigmax [ exch dup ] 0 setdash }
+ { dup [ exch 4 2 roll 2 copy div
+ 1 sub 2 div ceiling dup 4 1 roll
+ 1 add mul sub exch div ] 0 setdash
+ } ifelse stroke
+} def
+
+% stroke a lfigcdashed line: <length> <dashlength> lfigcdashed -
+/lfigcdashed
+{ 2 copy le 1 index 0 le or
+ { exch pop 1 pt lfigmax [ exch dup ] dup 0 get 2 div setdash }
+ { dup [ 4 2 roll exch 2 copy exch div
+ 2 div ceiling div 1 index sub
+ ] exch 2 div setdash
+ } ifelse stroke
+} def
+
+% stroke a dotted line: <length> <dashlength> lfigdotted -
+/lfigdotted
+{ 2 copy le 1 index 0 le or
+ { exch pop 1 pt lfigmax [ exch 0 exch ] 0 setdash }
+ { 1 index exch div ceiling div
+ [ 0 3 2 roll ] 0 setdash
+ } ifelse stroke
+} def
+
+% stroke a noline line: <length> <dashlength> lfignoline -
+/lfignoline
+{ pop pop
+} def
+
+% painting (i.e. filling): - lfigwhite - (etc.)
+/lfignopaint { } def
+/lfignochange { fill } def
+/lfigdarkblue { 0.0 0.0 0.5 setrgbcolor fill } def
+/lfigblue { 0.0 0.0 1.0 setrgbcolor fill } def
+/lfiglightblue { 0.5 0.5 1.0 setrgbcolor fill } def
+/lfigdarkgreen { 0.0 0.5 0.0 setrgbcolor fill } def
+/lfiggreen { 0.0 1.0 0.0 setrgbcolor fill } def
+/lfiglightgreen { 0.5 1.0 0.5 setrgbcolor fill } def
+/lfigdarkred { 0.5 0.0 0.0 setrgbcolor fill } def
+/lfigred { 1.0 0.0 0.0 setrgbcolor fill } def
+/lfiglightred { 1.0 0.5 0.5 setrgbcolor fill } def
+/lfigdarkcyan { 0.0 0.5 0.5 setrgbcolor fill } def
+/lfigcyan { 0.0 1.0 1.0 setrgbcolor fill } def
+/lfiglightcyan { 0.5 1.0 1.0 setrgbcolor fill } def
+/lfigdarkmagenta { 0.5 0.0 0.5 setrgbcolor fill } def
+/lfigmagenta { 1.0 0.0 1.0 setrgbcolor fill } def
+/lfiglightmagenta { 1.0 0.5 1.0 setrgbcolor fill } def
+/lfigdarkyellow { 0.5 0.5 0.0 setrgbcolor fill } def
+/lfigyellow { 1.0 1.0 0.0 setrgbcolor fill } def
+/lfiglightyellow { 1.0 1.0 0.5 setrgbcolor fill } def
+/lfigdarkgray { 0.2 0.2 0.2 setrgbcolor fill } def
+/lfiggray { 0.5 0.5 0.5 setrgbcolor fill } def
+/lfiglightgray { 0.8 0.8 0.8 setrgbcolor fill } def
+/lfigdarkgrey { 0.2 0.2 0.2 setrgbcolor fill } def
+/lfiggrey { 0.5 0.5 0.5 setrgbcolor fill } def
+/lfiglightgrey { 0.8 0.8 0.8 setrgbcolor fill } def
+/lfigblack { 0.0 0.0 0.0 setrgbcolor fill } def
+/lfigwhite { 1.0 1.0 1.0 setrgbcolor fill } def
+
+% line caps (and joins, not currently used)
+/lfigbutt 0 def
+/lfiground 1 def
+/lfigprojecting 2 def
+/lfigmiter 0 def
+/lfigbevel 2 def
+
+% shape and labels of the @Box symbol
+/lfigbox
+{
+ 0 0 /SW lfigpointdef
+ xsize 0 /SE lfigpointdef
+ xsize ysize /NE lfigpointdef
+ 0 ysize /NW lfigpointdef
+ SE 0.5 lfigpmul /S lfigpointdef
+ NW 0.5 lfigpmul /W lfigpointdef
+ W SE lfigpadd /E lfigpointdef
+ S NW lfigpadd /N lfigpointdef
+ NE 0.5 lfigpmul /CTR lfigpointdef
+ [ CTR NE lfigpsub /lfigboxcircum cvx ] lfigcircumdef
+ SW SE NE NW SW
+} def
+
+% shape and labels of the @CurveBox symbol
+/lfigcurvebox
+{
+
+ xsize 0.5 mul ysize 0.5 mul /CTR lfigpointdef
+ xsize 0.5 mul 0 /S lfigpointdef
+ xsize ysize 0.5 mul /E lfigpointdef
+ xsize 0.5 mul ysize /N lfigpointdef
+ 0 ysize 0.5 mul /W lfigpointdef
+
+ xmark 0.293 mul xmark 0.293 mul /SW lfigpointdef
+ xsize xmark 0.293 mul sub xmark 0.293 mul /SE lfigpointdef
+ xsize xmark 0.293 mul sub ysize xmark 0.293 mul sub /NE lfigpointdef
+ xmark 0.293 mul ysize xmark 0.293 mul sub /NW lfigpointdef
+
+ [ xsize ysize 0.5 lfigpmul xmark /lfigcurveboxcircum cvx ] lfigcircumdef
+
+ xmark 0
+ xsize xmark sub 0
+ [ xsize xmark sub xmark ]
+ xsize xmark
+ xsize ysize xmark sub
+ [ xsize xmark sub ysize xmark sub ]
+ xsize xmark sub ysize
+ xmark ysize
+ [ xmark ysize xmark sub ]
+ 0 ysize xmark sub
+ 0 xmark
+ [ xmark xmark ]
+ xmark 0
+} def
+
+% shadow of the @ShadowBox symbol
+% its shape and labels are done, somewhat inaccurately, with lfigbox
+/lfigshadow
+{ xmark 2 mul 0 moveto xsize 0 lineto
+ xsize ysize xmark 2 mul sub lineto
+ xsize xmark sub ysize xmark 2 mul sub lineto
+ xsize xmark sub xmark lineto
+ xmark 2 mul xmark lineto closepath fill
+} def
+
+% shape and labels of the @Square symbol
+/lfigsquare
+{
+ xsize ysize 0.5 lfigpmul /CTR lfigpointdef
+ CTR xsize xsize ysize ysize lfigpmax 0.5 lfigpmul lfigpadd /NE lfigpointdef
+ CTR 0 0 CTR NE lfigdistance 135 lfigatangle lfigpadd /NW lfigpointdef
+ CTR 0 0 CTR NE lfigdistance 225 lfigatangle lfigpadd /SW lfigpointdef
+ CTR 0 0 CTR NE lfigdistance 315 lfigatangle lfigpadd /SE lfigpointdef
+ SW 0.5 lfigpmul SE 0.5 lfigpmul lfigpadd /S lfigpointdef
+ NW 0.5 lfigpmul NE 0.5 lfigpmul lfigpadd /N lfigpointdef
+ SW 0.5 lfigpmul NW 0.5 lfigpmul lfigpadd /W lfigpointdef
+ SE 0.5 lfigpmul NE 0.5 lfigpmul lfigpadd /E lfigpointdef
+ [ CTR NE lfigpsub /lfigboxcircum cvx ] lfigcircumdef
+ SW SE NE NW SW
+} def
+
+% shape and labels of the @Diamond symbol
+/lfigdiamond
+{
+ xsize 0 0.5 lfigpmul /S lfigpointdef
+ 0 ysize 0.5 lfigpmul /W lfigpointdef
+ S W lfigpadd /CTR lfigpointdef
+ CTR W lfigpadd /N lfigpointdef
+ CTR S lfigpadd /E lfigpointdef
+ [ xsize ysize 0.5 lfigpmul /lfigdiamondcircum cvx ] lfigcircumdef
+ S E N W S
+} def
+
+% shape and labels of the @Ellipse symbol
+/lfigellipse
+{
+ xsize 0 0.5 lfigpmul /S lfigpointdef
+ 0 ysize 0.5 lfigpmul /W lfigpointdef
+ S W lfigpadd /CTR lfigpointdef
+ CTR W lfigpadd /N lfigpointdef
+ CTR S lfigpadd /E lfigpointdef
+ CTR xsize 0 0.3536 lfigpmul lfigpadd 0 ysize 0.3536 lfigpmul lfigpadd /NE lfigpointdef
+ 0 ysize 0.3536 lfigpmul CTR xsize 0 0.3536 lfigpmul lfigpadd lfigpsub /SE lfigpointdef
+ xsize 0 0.3536 lfigpmul CTR lfigpsub 0 ysize 0.3536 lfigpmul lfigpadd /NW lfigpointdef
+ 0 ysize 0.3536 lfigpmul xsize 0 0.3536 lfigpmul CTR lfigpsub lfigpsub /SW lfigpointdef
+ [ xsize ysize 0.5 lfigpmul /lfigellipsecircum cvx ] lfigcircumdef
+ S [ CTR ] E [ CTR ] N [ CTR ] W [ CTR ] S
+} def
+
+% shape and labels of the @Circle symbol
+/lfigcircle
+{
+ xsize ysize 0.5 lfigpmul /CTR lfigpointdef
+ CTR xsize 0 ysize 0 lfigpmax 0.5 lfigpmul lfigpadd /E lfigpointdef
+ CTR 0 0 CTR E lfigdistance 45 lfigatangle lfigpadd /NE lfigpointdef
+ CTR 0 0 CTR E lfigdistance 90 lfigatangle lfigpadd /N lfigpointdef
+ CTR 0 0 CTR E lfigdistance 135 lfigatangle lfigpadd /NW lfigpointdef
+ CTR 0 0 CTR E lfigdistance 180 lfigatangle lfigpadd /W lfigpointdef
+ CTR 0 0 CTR E lfigdistance 225 lfigatangle lfigpadd /SW lfigpointdef
+ CTR 0 0 CTR E lfigdistance 270 lfigatangle lfigpadd /S lfigpointdef
+ CTR 0 0 CTR E lfigdistance 315 lfigatangle lfigpadd /SE lfigpointdef
+ [ S E lfigpsub /lfigellipsecircum cvx ] lfigcircumdef
+ S [ CTR ] E [ CTR ] N [ CTR ] W [ CTR ] S
+} def
+
+% shape and labels of the @HLine and @HArrow symbols
+/lfighline
+{
+ 0 ymark lfigprevious /FROM lfigpointdef
+ xsize ymark lfigprevious /TO lfigpointdef
+} def
+
+% shape and labels of the @VLine and @VArrow symbols
+/lfigvline
+{
+ xmark ysize lfigprevious /FROM lfigpointdef
+ xmark 0 lfigprevious /TO lfigpointdef
+} def
+
+% points of a polygon around base with given no of sides, vert init angle:
+% <sides> <angle> figpolygon <point> ... <point>
+/lfigpolygon
+{ xsize ysize 0.5 lfigpmul /CTR lfigpointdef
+ 90 sub CTR 2 copy lfigmax 5 3 roll
+ [ 4 copy pop /lfigpolycircum cvx ] lfigcircumdef
+ exch dup 360 exch div exch
+ 1 1 3 2 roll
+ { 4 string cvs (P) exch lfigconcat cvn
+ 6 copy pop pop lfigatangle 2 copy 10 2 roll
+ 3 2 roll lfigpointdef
+ dup 3 1 roll add exch
+ } for
+ pop lfigatangle
+} def
+
+% next array element: <array> <index> lfiggetnext <array> <index> <any> true
+% or <array> <index> false
+/lfiggetnext
+{ 2 copy exch length ge
+ { false }
+ { 2 copy get exch 1 add exch true } ifelse
+} def
+
+% check whether thing is number: <any> lfigisnumbertype <any> <bool>
+/lfigisnumbertype
+{ dup type dup
+ /integertype eq exch /realtype eq or
+} def
+
+% check whether thing is an array: <any> lfigisarraytype <any> <bool>
+/lfigisarraytype { dup type /arraytype eq } def
+
+% get next item: <array> <index> lfiggetnextitem <array> <index> 0
+% or <array> <index> <array> 1
+% or <array> <index> <point> 2
+/lfiggetnextitem
+{ lfiggetnext
+ { lfigisarraytype
+ { 1
+ }
+ { lfigisnumbertype
+ { 3 1 roll
+ lfiggetnext
+ { lfigisnumbertype
+ { 4 3 roll exch 2
+ }
+ { pop 3 2 roll pop 0
+ } ifelse
+ }
+ { 3 2 roll pop 0
+ } ifelse
+ }
+ { pop 0
+ } ifelse
+ } ifelse
+ }
+ { 0
+ } ifelse
+} def
+
+% set arc path: bool x1 y1 x2 y2 x0 y0 lfigsetarc <angle> <angle> <dist>
+% the path goes from x1 y1 to x2 y2 about centre x0 y0,
+% anticlockwise if bool is true else clockwise.
+% The orientations of backwards pointing and forwards pointing
+% arrowheads are returned in the two angles, and
+% the length of the arc is returned in <dist>.
+/lfigsetarc
+{
+ 20 dict begin
+ matrix currentmatrix 8 1 roll
+ 2 copy translate 2 copy 8 2 roll
+ 4 2 roll lfigpsub 6 2 roll lfigpsub
+ dup /y1 exch def dup mul /y1s exch def
+ dup /x1 exch def dup mul /x1s exch def
+ dup /y2 exch def dup mul /y2s exch def
+ dup /x2 exch def dup mul /x2s exch def
+
+ y1s y2s eq
+ { -1
+ }
+ { y1s x2s mul y2s x1s mul sub y1s y2s sub div
+ } ifelse
+ /da exch def
+
+ x1s x2s eq
+ { -1
+ }
+ { x1s y2s mul x2s y1s mul sub x1s x2s sub div
+ } ifelse
+ /db exch def
+
+ da 0 gt db 0 gt and
+ { /LMax da sqrt db sqrt lfigmax def
+ /scalex da sqrt LMax div def
+ /scaley db sqrt LMax div def
+ scalex scaley scale
+ 0 0 LMax
+ 0 0 x1 scalex mul y1 scaley mul lfigangle
+ 0 0 x2 scalex mul y2 scaley mul lfigangle
+ 2 copy eq { 360 add } if
+ 2 copy 8 2 roll
+ 5 index { arc } { arcn } ifelse
+ 2 index 1 index
+ { 90 sub } { 90 add } ifelse
+ dup sin scaley mul exch cos scalex mul atan
+ 2 index 2 index
+ { 90 add } { 90 sub } ifelse
+ dup sin scaley mul exch cos scalex mul atan
+ 5 2 roll % res1 res2 ang1 ang2 anticlockwise
+ { exch sub } { sub } ifelse
+ dup 0 le { 360 add } if lfigpi mul LMax mul 180 div
+ }
+ { 0 0 x1 y1 lfigdistance 0 0 x2 y2 lfigdistance eq
+ 0 0 x1 y1 lfigdistance 0 gt and
+ { 0 0
+ 0 0 x1 y1 lfigdistance
+ 0 0 x1 y1 lfigangle
+ 0 0 x2 y2 lfigangle
+ 2 copy eq { 360 add } if
+ 2 copy 8 2 roll
+ 5 index { arc } { arcn } ifelse
+ 2 index 1 index
+ { 90 sub } { 90 add } ifelse
+ 2 index 2 index
+ { 90 add } { 90 sub } ifelse
+ 5 2 roll % res1 res2 ang1 ang2 clockwise
+ { exch sub } { sub } ifelse
+ dup 0 le { 360 add } if lfigpi mul 0 0 x1 y1 lfigdistance mul 180 div
+ }
+ { x2 y2 lineto pop
+ x2 y2 x1 y1 lfigangle
+ x1 y1 x2 y2 lfigangle
+ x1 y1 x2 y2 lfigdistance
+ } ifelse
+ } ifelse
+ 4 -1 roll setmatrix
+ end
+} def
+
+% lfigsetcurve: set up a Bezier curve from x0 y0 to x3 y3
+% and return arrowhead angles and length of curve (actually 0)
+% x0 y0 x1 y1 x2 y2 x3 y3 lfigsetcurve <angle> <angle> <length>
+/lfigsetcurve
+{ 8 copy curveto pop pop
+ lfigangle
+ 5 1 roll
+ 4 2 roll lfigangle
+ exch
+ 0
+} def
+
+% lfigpaintpath: paint a path of the given shape
+% /paint [ shape ] lfigpaintpath -
+/lfigpaintpath
+{
+ 10 dict begin
+ 0 newpath
+ /prevseen false def
+ /curveseen false def
+ { lfiggetnextitem
+ dup 0 eq { pop exit }
+ { 1 eq
+ { /curveseen true def
+ /curve exch def
+ curve length 0 eq { /curveseen false def } if
+ }
+ { /ycurr exch def
+ /xcurr exch def
+ prevseen
+ { curveseen
+ { curve length 4 eq
+ { xprev yprev
+ curve 0 get curve 1 get
+ curve 2 get curve 3 get
+ xcurr ycurr
+ lfigsetcurve pop pop pop
+ }
+ { xprev yprev xcurr ycurr
+ curve length 1 ge { curve 0 get } { 0 } ifelse
+ curve length 2 ge { curve 1 get } { 0 } ifelse
+ curve length 3 ge { curve 2 get } { true } ifelse
+ 7 1 roll
+ lfigsetarc pop pop pop
+ } ifelse
+ }
+ { xcurr ycurr lineto
+ } ifelse
+ }
+ { xcurr ycurr moveto
+ } ifelse
+ /xprev xcurr def
+ /yprev ycurr def
+ /prevseen true def
+ /curveseen false def
+ } ifelse
+ } ifelse
+ } loop pop pop cvx exec
+ end
+} def
+
+% stroke a path of the given shape in the given linestyle and dash length.
+% Return the origin and angle of the backward and forward arrow heads.
+% dashlength /linestyle [shape] lfigdopath [<point> <angle>] [<point> <angle>]
+/lfigdopath
+{
+ 10 dict begin
+ 0
+ /prevseen false def
+ /curveseen false def
+ /backarrow [] def
+ /fwdarrow [] def
+ {
+ lfiggetnextitem
+ dup 0 eq { pop exit }
+ {
+ 1 eq
+ { /curveseen true def
+ /curve exch def
+ curve length 0 eq { /prevseen false def } if
+ }
+ { /ycurr exch def
+ /xcurr exch def
+ prevseen
+ { newpath xprev yprev moveto
+ curveseen
+ { curve length 4 eq
+ { xprev yprev
+ curve 0 get curve 1 get
+ curve 2 get curve 3 get
+ xcurr ycurr lfigsetcurve
+ }
+ { xprev yprev xcurr ycurr
+ curve length 1 ge { curve 0 get } { 0 } ifelse
+ curve length 2 ge { curve 1 get } { 0 } ifelse
+ curve length 3 ge { curve 2 get } { true } ifelse
+ 7 1 roll
+ lfigsetarc
+ } ifelse
+ }
+ { xcurr ycurr lineto
+ xcurr ycurr xprev yprev lfigangle dup 180 sub
+ xprev yprev xcurr ycurr lfigdistance
+ } ifelse
+ 6 index 6 index cvx exec
+ [ xprev yprev 5 -1 roll ]
+ backarrow length 0 eq
+ { /backarrow exch def }
+ { pop } ifelse
+ [ xcurr ycurr 4 -1 roll ] /fwdarrow exch def
+ } if
+ /xprev xcurr def
+ /yprev ycurr def
+ /prevseen true def
+ /curveseen false def
+ } ifelse
+ } ifelse
+ } loop
+ pop pop pop pop
+ backarrow length 0 eq { [ 0 0 0 ] } { backarrow } ifelse
+ fwdarrow length 0 eq { [ 0 0 0 ] } { fwdarrow } ifelse
+ end
+} def
+
+% lfigdoarrow: draw an arrow head of given form
+% dashlength /lstyle /pstyle hfrac height width [ <point> <angle> ] lfigdoarrow -
+/lfigdoarrow
+{ matrix currentmatrix 8 1 roll
+ dup 0 get 1 index 1 get translate
+ 2 get rotate
+ [ 2 index neg 2 index 0 0
+ 3 index 3 index neg
+ 1 index 10 index mul 0
+ 7 index 7 index ]
+ 4 1 roll pop pop pop
+ dup 3 1 roll
+ gsave lfigpaintpath grestore lfigdopath pop pop
+ setmatrix
+} def
+
+% arrow head styles
+/lfigopen 0.0 def
+/lfighalfopen 0.5 def
+/lfigclosed 1.0 def
+
+% stroke no arrows, forward, back, and both
+/lfignoarrow { pop pop pop pop pop pop pop pop } def
+/lfigforward { 7 -1 roll lfigdoarrow pop } def
+/lfigback { 8 -2 roll pop lfigdoarrow } def
+/lfigboth { 8 -1 roll 7 copy lfigdoarrow pop 7 -1 roll lfigdoarrow } def
+
+% lfigprevious: return previous point on path
+/lfigprevious
+{ lfigisnumbertype
+ { 2 copy }
+ { lfigisarraytype
+ { 2 index 2 index }
+ { 0 0 }
+ ifelse
+ } ifelse
+} def
+
+% label a point in 2nd top dictionary: <point> /name lfigpointdef -
+/lfigpointdef
+{
+ % (Entering lfigpointdef) lfigdebugprint
+ [ 4 2 roll transform
+ /itransform cvx ] cvx
+ currentdict end
+ 3 1 roll
+ % currentdict length currentdict maxlength lt
+ % { def }
+ % { exec moveto (too many labels) show stop }
+ % ifelse
+ def
+ begin
+ % (Leaving lfigpointdef) lfigdebugprint
+} def
+
+% promote labels from second top to third top dictionary
+% <string> lfigpromotelabels -
+/lfigpromotelabels
+{
+ % (Entering lfigpromotelabels) lfigdebugprint
+ currentdict end exch currentdict end
+ { exch 20 string cvs 2 index
+ (@) lfigconcat exch lfigconcat cvn exch def
+ } forall pop begin
+ % (Leaving lfigpromotelabels) lfigdebugprint
+} def
+
+% show labels (except CIRCUM): - lfigshowlabels -
+/lfigshowlabels
+{
+ % (Entering lfigshowlabels) lfigdebugprint
+ currentdict end
+ currentdict
+ { 1 index 20 string cvs (CIRCUM) search % if CIRCUM in key
+ { pop pop pop pop pop }
+ { pop cvx exec 2 copy
+ newpath 1.5 pt 0 360 arc
+ 0 setgray fill
+ /Times-Roman findfont 8 pt scalefont setfont
+ moveto 0.2 cm 0.1 cm rmoveto 20 string cvs show
+ }
+ ifelse
+ } forall
+ begin
+ % (Leaving lfigshowlabels) lfigdebugprint
+} def
+
+% fix an angle to 0 <= res < 360: <angle> lfigfixangle <angle>
+/lfigfixangle
+{
+ % (Entering lfigfixangle) lfigdebugprint
+ { dup 0 ge { exit } if
+ 360 add
+ } loop
+ { dup 360 lt { exit } if
+ 360 sub
+ } loop
+ % (Leaving lfigfixangle) lfigdebugprint
+} def
+
+% find point on circumference of box: alpha a b lfigboxcircum x y
+/lfigboxcircum
+{
+ % (Entering lfigboxcircum) lfigdebugprint
+ 4 dict begin
+ /b exch def
+ /a exch def
+ lfigfixangle /alpha exch def
+ 0 0 a b lfigangle /theta exch def
+
+ % if alpha <= theta, return (a, a*tan(alpha))
+ alpha theta le
+ { a a alpha sin mul alpha cos div }
+ {
+ % else if alpha <= 180 - theta, return (b*cot(alpha), b)
+ alpha 180 theta sub le
+ { b alpha cos mul alpha sin div b }
+ {
+ % else if alpha <= 180 + theta, return (-a, -a*tan(alpha))
+ alpha 180 theta add le
+ { a neg a neg alpha sin mul alpha cos div }
+ {
+ % else if alpha <= 360 - theta, return (-b*cot(alpha), -b)
+ alpha 360 theta sub le
+ { b neg alpha cos mul alpha sin div b neg }
+ {
+ % else 360 - theta <= alpha, return (a, a*tan(alpha))
+ a a alpha sin mul alpha cos div
+ } ifelse
+ } ifelse
+ } ifelse
+ } ifelse
+ end
+ % (Leaving lfigboxcircum) lfigdebugprint
+} def
+
+% find quadratic roots (assume a != 0): a b c lfigqroots x1 x2 2
+% or x2 1
+% or 0
+/lfigqroots
+{
+ 4 dict begin
+ /c exch def
+ /b exch def
+ /a exch def
+ /disc b b mul 4 a c mul mul sub def
+ disc 0 lt
+ { 0
+ }
+ { disc 0 eq
+ { b neg 2 a mul div
+ 1
+ }
+ { b neg disc sqrt add 2 a mul div
+ b neg disc sqrt sub 2 a mul div
+ 2
+ }
+ ifelse
+ }
+ ifelse
+ end
+} def
+
+% work our which quadrant: <angle> lfigquadrant <0-3>
+/lfigquadrant
+{ dup 90 lt
+ { pop 0
+ }
+ { dup 180 lt
+ { pop 1
+ }
+ { 270 lt
+ { 2
+ }
+ { 3
+ } ifelse
+ } ifelse
+ } ifelse
+} def
+
+% find curvebox circum, assuming upper right quadrant: alpha a b xmk lfigcb x y
+/lfigcb
+{
+ 6 dict begin
+ /xmk exch def
+ /b exch def
+ /a exch def
+ /alpha exch def
+ /theta1 0 0 a b xmk sub lfigangle def
+ /theta2 0 0 a xmk sub b lfigangle def
+ alpha theta1 le
+ { % if alpha <= theta1, return (a, a*tan(alpha))
+ a a alpha sin mul alpha cos div
+ }
+ { alpha theta2 ge
+ { % else if alpha > theta2, return (b*cot(alpha), b)
+ b alpha cos mul alpha sin div b
+ }
+ {
+ % else, return the intersection of line and circle
+ a xmk sub b xmk sub xmk 0 0 alpha lfigcircleintersect
+ dup 0 eq
+ { % should never happen, just return any reasonable point
+ pop
+ a b 0.5 lfigpmul
+ }
+ { 1 eq
+ { % should never happen, just return the point on top of stack
+ }
+ { % the usual case, two points on stack, return the larger
+ lfigpmax
+ } ifelse
+ } ifelse
+ } ifelse
+ } ifelse
+ end
+} def
+
+% find point on circumference of curvebox: alpha a b xmk lfigcurveboxcircum x y
+/lfigcurveboxcircum
+{
+ % (Entering lfigcurveboxcircum) lfigdebugprint
+ 5 dict begin
+ /xmk exch def
+ /b exch def
+ /a exch def
+ lfigfixangle /alpha exch def
+
+ % work out which quadrant we are in, and reflect accordingly
+ /quad alpha lfigquadrant def
+ quad 0 eq
+ { alpha a b xmk lfigcb
+ }
+ { quad 1 eq
+ { 180 alpha sub a b xmk lfigcb exch neg exch
+ }
+ { quad 2 eq
+ { alpha 180 sub a b xmk lfigcb neg exch neg exch
+ }
+ { 360 alpha sub a b xmk lfigcb neg
+ } ifelse
+ } ifelse
+ } ifelse
+ end
+ % (Leaving lfigcurveboxcircum) lfigdebugprint
+} def
+
+% find point on circumference of diamond: alpha a b lfigdiamondcircum x y
+/lfigdiamondcircum
+{
+ % (Entering lfigdiamondcircum) lfigdebugprint
+ 4 dict begin
+ /b exch def
+ /a exch def
+ lfigfixangle /alpha exch def
+ b alpha cos abs mul a alpha sin abs mul add /denom exch def
+ a b mul alpha cos mul denom div
+ a b mul alpha sin mul denom div
+ end
+ % (Leaving lfigdiamondcircum) lfigdebugprint
+} def
+
+% find point on circumference of ellipse: alpha a b lfigellipsecircum x y
+/lfigellipsecircum
+{
+ % (Entering lfigellipsecircum) lfigdebugprint
+ 4 dict begin
+ /b exch def
+ /a exch def
+ lfigfixangle /alpha exch def
+ b alpha cos mul dup mul a alpha sin mul dup mul add sqrt /denom exch def
+ a b mul alpha cos mul denom div
+ a b mul alpha sin mul denom div
+ end
+ % (Leaving lfigellipsecircum) lfigdebugprint
+} def
+
+% find point of intersection of two lines each defined by two points
+% x1 y1 x2 y2 x3 y3 x4 y4 lfiglineintersect x y
+/lfiglineintersect
+{
+ % (Entering lfiglineintersect) lfigdebugprint
+ 13 dict begin
+ /y4 exch def
+ /x4 exch def
+ /y3 exch def
+ /x3 exch def
+ /y2 exch def
+ /x2 exch def
+ /y1 exch def
+ /x1 exch def
+ x2 x1 sub /x21 exch def
+ x4 x3 sub /x43 exch def
+ y2 y1 sub /y21 exch def
+ y4 y3 sub /y43 exch def
+ y21 x43 mul y43 x21 mul sub /det exch def
+
+ % calculate x
+ y21 x43 mul x1 mul
+ y43 x21 mul x3 mul sub
+ y3 y1 sub x21 mul x43 mul add
+ det div
+
+ % calculate y
+ x21 y43 mul y1 mul
+ x43 y21 mul y3 mul sub
+ x3 x1 sub y21 mul y43 mul add
+ det neg div
+
+ end
+ % (Leaving lfiglineintersect) lfigdebugprint
+} def
+
+% find point on circumference of polygon
+% alpha radius num theta lfigpolycircum x y
+/lfigpolycircum
+{
+ % (Entering lfigpolycircum) lfigdebugprint
+ 13 dict begin
+ /theta exch def
+ /num exch def
+ /radius exch def
+ /alpha exch def
+
+ % calculate delta, the angle from theta to alpha
+ alpha theta sub lfigfixangle
+
+ % calculate the angle which is the multiple of 360/num closest to delta
+ 360 num div div truncate 360 num div mul theta add /anglea exch def
+
+ % calculate the next multiple of 360/num after anglea
+ anglea 360 num div add /angleb exch def
+
+ % intersect the line through these two points with the alpha line
+ anglea cos anglea sin angleb cos angleb sin
+ 0 0 alpha cos 2 mul alpha sin 2 mul
+ lfiglineintersect radius lfigpmul
+
+ end
+ % (Leaving lfigpolycircum) lfigdebugprint
+} def
+
+% find point of intersection of a point and a circle
+% x0 y0 r x1 y1 theta lfigcircleintersect xa ya xb yb 2
+% or xb yb 1
+% or 0
+/lfigcircleintersect
+{
+ % (Entering lfigcircleintersect) lfigdebugprint
+ 15 dict begin
+ /theta exch def
+ /y1 exch def
+ /x1 exch def
+ /r exch def
+ /y0 exch def
+ /x0 exch def
+
+ % if sin(theta) = 0 then line is horizontal and y must be y1
+ theta sin abs 0.00001 lt
+ {
+ /a 1 def
+ /b -2 x0 mul def
+ /c x0 dup mul y1 y0 sub dup mul add r dup mul sub def
+ a b c lfigqroots dup
+ 0 eq
+ { pop
+ 0
+ }
+ { 1 eq
+ { y1 1
+ }
+ { y1 exch y1 2
+ } ifelse
+ } ifelse
+ }
+ {
+ /ct theta cos theta sin div def
+ /a ct ct mul 1 add def
+ /b ct x1 x0 sub mul y1 add y0 sub 2 mul def
+ /c x1 x0 sub dup mul y1 y0 sub dup mul add r dup mul sub def
+ a b c lfigqroots dup
+ 0 eq
+ { pop
+ 0
+ }
+ { 1 eq
+ { y1 add /yb exch def
+ yb y1 sub ct mul x1 add /xb exch def
+ xb yb 1
+ }
+ { y1 add /ya exch def
+ ya y1 sub ct mul x1 add /xa exch def
+ y1 add /yb exch def
+ yb y1 sub ct mul x1 add /xb exch def
+ xa ya xb yb 2
+ } ifelse
+ } ifelse
+ } ifelse
+ end
+ % (Leaving lfigcircleintersect) lfigdebugprint
+} def
+
+% add CIRCUM operator with this body: <array> lfigcircumdef -
+/lfigcircumdef
+{ % (Entering lfigcircumdef) lfigdebugprint
+ /CIRCUM exch cvx
+ currentdict end
+ 3 1 roll
+ % currentdict length currentdict maxlength lt
+ % { def }
+ % { exec moveto (too many labels) show stop }
+ % ifelse
+ def
+ begin
+ % (Leaving lfigcircumdef) lfigdebugprint
+} def
+
+end
+%%EndResource
+
+%%BeginResource: procset LoutGraphPrependGraphic
+% @PrependGraphic file /export/home/6monthspace/jeff/lout.lib/include/graphf.lpg
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+% %
+% PostScript @SysPrependGraphic file for @Graph (Version 1.0) %
+% %
+% Version 1.0 by Jeffrey H. Kingston, December 1993. %
+% %
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+errordict begin
+ /handleerror
+ {
+ { /Times-Roman findfont 8 pt scalefont setfont
+ 0 setgray 4 pt 4 pt moveto
+ $error /errorname get
+ dup lgraphdict exch known
+ { lgraphdict exch get }
+ { 30 string cvs } ifelse
+ show
+ ( Command: ) show
+ $error /command get 30 string cvs show
+ } stopped {} if
+ showpage stop
+ } def
+end
+
+/lgraphdict 200 dict def
+lgraphdict begin
+
+% error messages
+/dictfull (dictfull error) def
+/dictstackoverflow (dictstackoverflow error) def
+/execstackoverflow (execstackoverflow error: expression too complex?) def
+/limitcheck (limitcheck error: graph too complex or too large?) def
+/syntaxerror (syntaxerror error: syntax error in text of graph?) def
+/typecheck (typecheck error: syntax error in text of graph?) def
+/undefined (undefined error: unknown or misspelt symbol?) def
+/rangecheck (rangecheck error: undefined expression (e.g. divide by zero)?) def
+/VMError (VMError error: run out of memory?) def
+
+% random number between x and y inclusive: x y dorand num
+/dorand { 1 index sub 1 add rand exch mod add } def
+
+% log to given base: base num dolog num
+/dolog { ln exch ln div } def
+
+% maximum of two numbers: <num> <num> max <num>
+/max { 2 copy gt { pop } { exch pop } ifelse } def
+
+% add two points: <point> <point> padd <point>
+/padd { exch 3 1 roll add 3 1 roll add exch } def
+
+% subtract first point from second: <point> <point> psub <point>
+/psub { 3 2 roll sub 3 1 roll exch sub exch } def
+
+% distance between two points: <point> <point> distance <length>
+/distance { psub dup mul exch dup mul add sqrt } def
+
+% point at angle and distance: <point> <length> <angle> atangle <point>
+/atangle { 2 copy cos mul 3 1 roll sin mul padd } def
+
+% angle from one point to another: <point> <point> angle <angle>
+/angle { psub 2 copy 0 eq exch 0 eq and {pop} {exch atan} ifelse } def
+
+
+% set up for line
+% - linesetup <length> <dashlength>
+/linesetup
+{ newpath
+ xcurr ycurr trpoint xprev yprev trpoint
+ 4 copy moveto lineto distance dashlength
+} def
+
+% set up for icon-avoiding line
+% - ilinesetup <length> <dashlength>
+/ilinesetup
+{ newpath
+ xprev yprev trpoint xcurr ycurr trpoint 4 copy
+ 4 copy angle symbolsize 1.5 mul exch 4 2 roll pop pop atangle
+ 6 2 roll 4 2 roll
+ 4 copy angle symbolsize 1.5 mul exch 4 2 roll pop pop atangle
+ 4 copy moveto lineto distance dashlength
+} def
+
+
+% stroke a solid line: <length> <dashlength> solid -
+/solid
+{ pop pop [] 0 setdash linewidth setlinewidth stroke
+} def
+
+% stroke a dashed line: <length> <dashlength> dashed -
+/dashed
+{ 2 copy 2 mul le 1 index 0 le or
+ { exch pop 1 pt max [ exch dup ] 0 setdash }
+ { dup [ exch 4 2 roll 2 copy div
+ 1 sub 2 div ceiling dup 4 1 roll
+ 1 add mul sub exch div ] 0 setdash
+ } ifelse linewidth setlinewidth stroke
+} def
+
+% stroke a cdashed line: <length> <dashlength> cdashed -
+/cdashed
+{ 2 copy le 1 index 0 le or
+ { exch pop 1 pt max [ exch dup ] dup 0 get 2 div setdash }
+ { dup [ 4 2 roll exch 2 copy exch div
+ 2 div ceiling div 1 index sub
+ ] exch 2 div setdash
+ } ifelse linewidth setlinewidth stroke
+} def
+
+% stroke a dotted line: <length> <dashlength> dotted -
+/dotted
+{ 2 copy le 1 index 0 le or
+ { exch pop 1 pt max [ exch 0 exch ] 0 setdash }
+ { 1 index exch div ceiling div 0.99999 mul
+ [ 0 3 2 roll ] 0 setdash
+ } ifelse gsave 1 setlinecap linewidth setlinewidth stroke grestore newpath
+} def
+
+% stroke a noline line: <length> <dashlength> noline -
+/noline
+{ pop pop
+} def
+
+% stroke a y histogram: - yhisto -
+/yhisto
+{ xprev yleft trpoint yextra sub moveto
+ xprev yprev trpoint lineto
+ xcurr yprev trpoint lineto
+ xcurr yleft trpoint yextra sub lineto
+ linewidth setlinewidth stroke
+} def
+
+% stroke an x histogram: - xhisto -
+/xhisto
+{ xleft yprev trpoint exch xextra sub exch moveto
+ xcurr yprev trpoint lineto
+ xcurr ycurr trpoint lineto
+ xleft ycurr trpoint exch xextra sub exch lineto
+ linewidth setlinewidth stroke
+} def
+
+% stroke a surface y histogram: - surfaceyhisto -
+/surfaceyhisto
+{ firstpair
+ { xprev yleft trpoint yextra sub moveto
+ xprev yprev trpoint lineto
+ }
+ { xprev yprev trpoint moveto
+ } ifelse
+ xcurr yprev trpoint lineto
+ lastpair
+ { xcurr yleft trpoint yextra sub lineto
+ }
+ { xcurr ycurr trpoint lineto
+ } ifelse
+ linewidth setlinewidth stroke
+} def
+
+% stroke a surface x histogram: - surfacexhisto -
+/surfacexhisto
+{ firstpair
+ { xleft yprev trpoint exch xextra sub exch moveto
+ }
+ { xprev yprev trpoint moveto
+ } ifelse
+ xcurr yprev trpoint lineto
+ xcurr ycurr trpoint lineto
+ lastpair
+ { xleft ycurr trpoint exch xextra sub exch lineto
+ } if
+ linewidth setlinewidth stroke
+} def
+
+% stroke a filled y histogram: - filledyhisto -
+/filledyhisto
+{
+ linewidth setlinewidth
+ xprev yleft trpoint exch currentlinewidth 2 div add exch yextra sub moveto
+ xprev yprev trpoint exch currentlinewidth 2 div add exch lineto
+ xcurr yprev trpoint exch currentlinewidth 2 div sub exch lineto
+ xcurr yleft trpoint exch currentlinewidth 2 div sub exch yextra sub lineto
+ closepath fill
+} def
+
+% stroke a filled x histogram: - filledxhisto -
+/filledxhisto
+{
+ linewidth setlinewidth
+ xleft yprev trpoint currentlinewidth 2 div add exch xextra sub exch moveto
+ xcurr yprev trpoint currentlinewidth 2 div add lineto
+ xcurr ycurr trpoint currentlinewidth 2 div sub lineto
+ xleft ycurr trpoint currentlinewidth 2 div sub exch xextra sub exch lineto
+ closepath fill
+} def
+
+
+% cross: show a small cross
+/cross
+{ newpath
+ xcurr ycurr trpoint moveto
+ symbolsize neg symbolsize neg rmoveto
+ symbolsize 2 mul symbolsize 2 mul rlineto
+ 0 symbolsize -2 mul rmoveto
+ symbolsize -2 mul symbolsize 2 mul rlineto
+ [] 0 setdash stroke
+} def
+
+% plus: show a small plus
+/plus
+{ newpath
+ xcurr ycurr trpoint moveto
+ symbolsize neg 0 rmoveto
+ symbolsize 2 mul 0 rlineto
+ symbolsize neg symbolsize neg rmoveto
+ 0 symbolsize 2 mul rlineto
+ [] 0 setdash stroke
+} def
+
+% square: show a small square
+/square
+{ newpath
+ xcurr ycurr trpoint moveto
+ symbolsize neg symbolsize neg rmoveto
+ symbolsize 2 mul 0 rlineto
+ 0 symbolsize 2 mul rlineto
+ symbolsize -2 mul 0 rlineto
+ closepath [] 0 setdash stroke
+} def
+
+% filledsquare: show a small filled square
+/filledsquare
+{ newpath
+ xcurr ycurr trpoint moveto
+ symbolsize neg symbolsize neg rmoveto
+ symbolsize 2 mul 0 rlineto
+ 0 symbolsize 2 mul rlineto
+ symbolsize -2 mul 0 rlineto
+ closepath gsave [] 0 setdash stroke grestore fill
+} def
+
+% diamond: show a small diamond
+/diamond
+{ newpath
+ xcurr ycurr trpoint moveto
+ symbolsize neg 0 rmoveto
+ symbolsize symbolsize neg rlineto
+ symbolsize symbolsize rlineto
+ symbolsize neg symbolsize rlineto
+ closepath [] 0 setdash stroke
+} def
+
+% filleddiamond: show a small filled diamond
+/filleddiamond
+{ newpath
+ xcurr ycurr trpoint moveto
+ symbolsize neg 0 rmoveto
+ symbolsize symbolsize neg rlineto
+ symbolsize symbolsize rlineto
+ symbolsize neg symbolsize rlineto
+ closepath gsave [] 0 setdash stroke grestore fill
+} def
+
+% circle: show a small circle
+/circle
+{ newpath
+ xcurr ycurr trpoint symbolsize 0 360 arc [] 0 setdash stroke
+} def
+
+% filledcircle: show a small filled circle
+/filledcircle
+{ newpath
+ xcurr ycurr trpoint symbolsize 0 360 arc gsave [] 0 setdash stroke grestore fill
+} def
+
+% triangle: show a small triangle
+/triangle
+{ newpath
+ xcurr ycurr trpoint moveto
+ 0 symbolsize 1.5 mul rmoveto
+ symbolsize neg symbolsize -2.5 mul rlineto
+ symbolsize 2 mul 0 rlineto
+ closepath [] 0 setdash stroke
+} def
+
+% filledtriangle: show a small filled triangle
+/filledtriangle
+{ newpath
+ xcurr ycurr trpoint moveto
+ 0 symbolsize 1.5 mul rmoveto
+ symbolsize neg symbolsize -2.5 mul rlineto
+ symbolsize 2 mul 0 rlineto
+ closepath gsave [] 0 setdash stroke grestore fill
+} def
+
+
+%plog: like log only with a base, and protected from failing if <= 0
+% base x plog res
+/plog { dup 0 le { pop pop 0 } { ln exch ln div } ifelse } def
+
+% xtr: transform one x value logarithmically if xlog > 1
+% <num> xtr <num>
+/xtr
+{ xlog 1 gt
+ { xlog exch plog
+ } if
+} def
+
+% ytr: transform one y value logarithmically if ylog > 1
+% <num> ytr <num>
+/ytr
+{ ylog 1 gt
+ { ylog exch plog
+ } if
+} def
+
+% % trpoint: transform (x, y) in graph space into (x', y') in print space
+% % x y trpoint x' y'
+% /trpoint
+% { exch xtr trxmin sub trxmax trxmin sub div xwidth mul xextra add
+% exch ytr trymin sub trymax trymin sub div ywidth mul yextra add
+% } def
+
+
+% trpoint: transform (x, y) in graph space into (x', y') in print space
+% x y trpoint x' y'
+/trpoint
+{ exch xtr xdecr { trxmax exch sub } { trxmin sub } ifelse
+ trxmax trxmin sub div xwidth mul xextra add
+
+ exch ytr ydecr { trymax exch sub } { trymin sub } ifelse
+ trymax trymin sub div ywidth mul yextra add
+} def
+
+
+% yonly: interpolate x values 1, 2, ... into data
+% [ data ] yonly [ newdata ]
+/yonly
+{ dup /tmp exch def
+ length [ exch 1 exch 1 exch
+ { dup tmp exch 1 sub get
+ } for
+ ]
+} def
+
+% xonly: interpolate y values 1, 2, ... into data
+% [ data ] yonly [ newdata ]
+/xonly
+{ dup /tmp exch def
+ length [ exch 1 exch 1 exch
+ { dup tmp exch 1 sub get exch
+ } for
+ ]
+} def
+
+% xandy: no interpolation of x or y values
+% [ data ] xandy [ data ]
+/xandy {} def
+
+
+% expstringwidth: calculate width of string containing optional exponent
+% <string> expstringwidth <width>
+/expstringwidth
+{ (^) search
+ { exch pop stringwidth pop exch stringwidth pop 0.7 mul add }
+ { stringwidth pop }
+ ifelse
+} def
+
+% expstringshow: show string containing optional exponent
+% <string> expstringshow -
+/expstringshow
+{ (^) search
+ { exch pop show 0 0.5 ft rmoveto
+ gsave currentfont 0.7 scalefont setfont show grestore
+ }
+ { show
+ }
+ ifelse
+} def
+
+% concatenate two strings: <string> <string> strconcat <string>
+/strconcat
+{ 2 copy length exch length add string
+ dup 0 4 index putinterval
+ dup 3 index length 3 index putinterval
+ 3 1 roll pop pop
+} def
+
+% lgen: generate one label automatically
+% num lgen num string
+/lgen { dup 20 string cvs } def
+
+% loglgen: generate one logarithmic label (with exponent)
+% <base> <exponent> loglgen <string>
+/loglgen
+{ 20 string cvs exch 20 string cvs
+ (^) strconcat exch strconcat
+} def
+
+
+% printxtick: print one x tick
+% xpos printxtick -
+/printxtick
+{ newpath
+ yleft trpoint moveto 0 yextra neg rmoveto
+ 0 xticklength neg rlineto [] 0 setdash stroke
+} def
+
+% printxlabel: print one x label
+% (xlabel) xpos printxlabel -
+/printxlabel
+{ yleft trpoint moveto 0 yextra neg rmoveto
+ 0 xticklength neg rmoveto 0 0.9 ft neg rmoveto
+ xlog 1 gt { 0 0.3 ft neg rmoveto } if
+ dup expstringwidth -2 div 0 rmoveto expstringshow
+} def
+
+% printytick: print one y tick
+% ypos printytick -
+/printytick
+{ newpath
+ xleft exch trpoint moveto xextra neg 0 rmoveto
+ yticklength neg 0 rlineto [] 0 setdash stroke
+} def
+
+% printylabel: print one y label
+% (ylabel) ypos printylabel -
+/printylabel
+{ xleft exch trpoint moveto xextra neg 0 rmoveto
+ yticklength neg 0 rmoveto -0.3 ft -0.3 ft rmoveto
+ dup expstringwidth neg 0 rmoveto expstringshow
+} def
+
+% printrtick: print one r tick
+% ypos printrtick -
+/printrtick
+{ newpath
+ xright exch trpoint moveto xextra 0 rmoveto
+ rticklength 0 rlineto [] 0 setdash stroke
+} def
+
+% printrlabel: print one r label
+% (rlabel) ypos printrlabel -
+/printrlabel
+{ xright exch trpoint moveto xextra 0 rmoveto
+ rticklength 0 rmoveto 0.3 ft -0.3 ft rmoveto
+ expstringshow
+} def
+
+% printticks: print ticks and labels
+% /tickproc /labelproc [ tickandlabeldata ] min printticks -
+/printticks
+{ /prev exch def
+ { dup type dup dup /integertype eq exch /realtype eq or
+ { pop dup /prev exch def 2 index cvx exec
+ }
+ { /stringtype eq
+ { prev 2 index cvx exec
+ }
+ { pop
+ } ifelse
+ } ifelse
+ } forall
+ pop pop
+} def
+
+
+% printxaxistick: print one x axis tick
+% xpos printxaxistick -
+/printxaxistick
+{ newpath
+ yaxis trpoint moveto 0 xticklength -2 div rmoveto
+ 0 xticklength rlineto [] 0 setdash stroke
+} def
+
+% printxaxislabel: print one x axis label
+% (xlabel) xpos printxaxislabel -
+/printxaxislabel
+{ yaxis trpoint moveto
+ 0 xticklength -2 div rmoveto 0 0.9 ft neg rmoveto
+ xlog 1 gt { 0 0.3 ft neg rmoveto } if
+ dup expstringwidth -2 div 0 rmoveto expstringshow
+} def
+
+% printyaxistick: print one y axis tick
+% ypos printyaxistick -
+/printyaxistick
+{ newpath
+ xaxis exch trpoint moveto
+ yticklength -2 div 0 rmoveto
+ yticklength 0 rlineto [] 0 setdash stroke
+} def
+
+% printyaxislabel: print one y axis label
+% (ylabel) ypos printyaxislabel -
+/printyaxislabel
+{ xaxis exch trpoint moveto
+ yticklength -2 div 0 rmoveto -0.3 ft -0.3 ft rmoveto
+ dup expstringwidth neg 0 rmoveto expstringshow
+} def
+
+
+% <val> minmax -
+% perform minv := min(minv, val); maxv := max(maxv, val)
+% allowing for the possibility of minv, maxv, val being false (undefined)
+/minmax
+{ dup false eq
+ { pop }
+ { minv false eq
+ { dup /minv exch def /maxv exch def }
+ { dup minv lt
+ { /minv exch def }
+ { dup maxv gt
+ { /maxv exch def }
+ { pop }
+ ifelse
+ } ifelse
+ } ifelse
+ } ifelse
+} def
+
+% <ticks> ticksundef <ticks> <bool>
+% returns true iff the ticks array is undefined (one false entry)
+/ticksundef
+{ dup length 1 eq
+ { dup 0 get false eq
+ }
+ { false }
+ ifelse
+} def
+
+% <number> integral <boolean>
+% true if the number has an integral value
+/integral { dup round eq } def
+
+% ticksep ticks xory alldata minval maxval axis base ticksandlimits ticks min max base
+% ticksandlimits: sort out value of x or y ticks and limits and log base
+/ticksandlimits
+{ /base exch def
+ /minv false def
+ /maxv false def
+
+ % min and max of user-supplied minval, maxval, and axis
+ minmax minmax minmax
+
+ % min and max of data points
+ { 0 get dup dup length 1 sub 3 index exch 2 exch
+ { get minmax dup
+ } for pop pop
+ } forall
+ pop dup
+
+ % min and max of tick values
+ { dup type /stringtype eq
+ { pop } { minmax } ifelse
+ } forall
+
+ % fix minv and maxv if undefined (false) or equal
+ minv false eq
+ { /minv -1 def /maxv 1 def }
+ { minv maxv eq
+ { minv 0 lt
+ { /minv 2 minv mul def /maxv 0 def
+ }
+ { minv 0 eq
+ { /minv -1 def /maxv 1 def
+ }
+ { /minv 0 def /maxv 2 maxv mul def
+ } ifelse
+ } ifelse
+ } if
+ } ifelse
+
+ % invent ticks if undefined
+ ticksundef
+ { pop /ticksep exch def
+
+ % if base is reasonable and minv is positive, logarithmic ticks
+ base 1 gt minv 0 gt and
+ {
+ % get integral log of minv and maxv
+ /logminv base minv plog floor cvi def
+ /logmaxv base maxv plog ceiling cvi def
+
+ % if minv close to base, make it 1; reset minv and maxv
+ logminv 1 eq logmaxv 4 ge and { /logminv 0 def } if
+ /minv base logminv exp def
+ /maxv base logmaxv exp def
+
+ % ticks := [ base**logminv, ... , base**logmaxv ]
+ [ logminv 1 logmaxv
+ { dup base exch exp
+ exch base exch loglgen
+ } for
+ ]
+ }
+ { % non-logarithmic ticks
+ {
+ % fix tick separation if undefined (0) or too small
+ /base 0 def
+ /delta maxv minv sub def
+ ticksep delta 30 div le
+ { /ticksep 10 delta log 1 sub ceiling exp def
+ ticksep delta 2 div ge
+ { /ticksep ticksep 2 div def }
+ { ticksep delta 5 div lt
+ { /ticksep 2 ticksep mul def
+ } if
+ } ifelse
+ } if
+
+ % adjust minv and maxv to be multiples of ticksep
+ /minv minv ticksep div floor ticksep mul def
+ /maxv maxv ticksep div ceiling ticksep mul def
+ /delta maxv minv sub def
+
+ % if minv or maxv near zero, move to zero and redo
+ minv ticksep eq
+ { /minv 0 def }
+ { maxv ticksep neg eq { /maxv 0 def } { exit } ifelse
+ } ifelse
+ } loop
+
+ % if minv, maxv, and ticksep are all integral, set "makeint" to true
+ /makeint minv integral maxv integral ticksep integral and and def
+
+ % ticks := [ minv, minv+ticksep, ... , maxv ]
+ [ 0 1 delta ticksep div round
+ { ticksep mul minv add makeint { cvi } if lgen }
+ for
+ ]
+ } ifelse
+ }
+ { exch pop
+ } ifelse
+ minv maxv base
+} def
+
+% xset: set up all data for x axis, including limits and ticks
+% xticksep xticks 0 alldata xmin xmax xlog xextra xdecr xaxis xticklength xset -
+/xset
+{ /xticklength exch def
+ /xaxis exch def
+ /xdecr exch def
+ /xextra exch def
+ xaxis exch ticksandlimits
+ /xlog exch def /xmax exch def /xmin exch def /xticks exch def
+ /xleft xdecr { xmax } { xmin } ifelse def
+ /xright xdecr { xmin } { xmax } ifelse def
+ /xwidth xsize xextra 2 mul sub def
+ /trxmin xmin xtr def /trxmax xmax xtr def
+} def
+
+% yset: set up all data for y axis, including limits and yticks
+% yticksep yticks 0 alldata ymin ymax ylog yextra ydecr yaxis yticklength yset -
+/yset
+{ /yticklength exch def
+ /yaxis exch def
+ /ydecr exch def
+ /yextra exch def
+ yaxis exch ticksandlimits
+ /ylog exch def /ymax exch def /ymin exch def /yticks exch def
+ /yleft ydecr { ymax } { ymin } ifelse def
+ /yright ydecr { ymin } { ymax } ifelse def
+ /ywidth ysize yextra 2 mul sub def
+ /trymin ymin ytr def /trymax ymax ytr def
+} def
+
+% rset: set up all data for y axis (again), but including limits and rticks
+% rticksep rticks 0 alldata ymin ymax ylog yextra ydecr yaxis rticklength rset -
+/rset
+{ /rticklength exch def
+ /yaxis exch def
+ /ydecr exch def
+ /yextra exch def
+ yaxis exch ticksandlimits
+ /ylog exch def /ymax exch def /ymin exch def /rticks exch def
+ /yleft ydecr { ymax } { ymin } ifelse def
+ /yright ydecr { ymin } { ymax } ifelse def
+ /ywidth ysize yextra 2 mul sub def
+ /trymin ymin ytr def /trymax ymax ytr def
+} def
+
+% norset: set up data for no rticks
+% - norset -
+/norset
+{ /rticklength 0 def
+ /rticks [] def
+} def
+
+% framestyle: print a frame around the graph
+/framestyle
+{ 0 0 moveto xsize 0 lineto xsize ysize lineto
+ 0 ysize lineto closepath stroke
+ /printxtick /printxlabel xticks xleft printticks
+ /printytick /printylabel yticks ymin printticks
+ /printrtick /printrlabel rticks ymin printticks
+} def
+
+% nonestyle: print nothing around the graph
+/nonestyle
+{
+} def
+
+% axesstyle: print axes for the graph (unless axis values missing)
+/axesstyle
+{
+ xaxis false eq yaxis false eq or
+ { framestyle }
+ { xaxis yaxis trpoint dup 0 exch moveto xsize exch lineto
+ dup 0 moveto ysize lineto stroke
+ /printxaxistick /printxaxislabel xticks xleft printticks
+ /printyaxistick /printyaxislabel yticks ymin printticks
+ } ifelse
+} def
+
+% rundata: run all data sets
+/rundata
+{ alldata
+ { gsave
+ dup dup dup dup
+ 4 get /dopaint exch def
+ 3 get /initrun exch def
+ 2 get /pairs exch def
+ 1 get /points exch def
+ 0 get /data exch def
+ dopaint
+ { data length 4 ge
+ { initrun
+ newpath
+ data 0 get ymin trpoint yextra sub moveto
+ 0 2 data length 2 sub
+ { dup 1 add
+ data exch get /ycurr exch def
+ data exch get /xcurr exch def
+ xcurr ycurr trpoint lineto
+ } for
+ data dup length 2 sub get ymin trpoint yextra sub lineto
+ closepath fill
+ } if
+ } if
+ initrun
+ data length 2 ge
+ {
+ /xcurr data 0 get def
+ /ycurr data 1 get def
+ points
+ data length 4 ge
+ { 2 2 data length 2 sub
+ { /xprev xcurr def
+ /yprev ycurr def
+ dup dup 2 eq /firstpair exch def
+ data length 2 sub eq /lastpair exch def
+ dup 1 add
+ data exch get /ycurr exch def
+ data exch get /xcurr exch def
+ pairs
+ points
+ } for
+ } if
+ } if
+ grestore
+ } forall
+} def
+
+end
+%%EndResource
+
+%%BeginResource: procset LoutBasicSetup
+% @PrependGraphic file /export/home/6monthspace/jeff/lout.lib/include/bsf.lpg
+
+% width height linethickness louteuro -
+% draw a Euro symbol of this width and height with this line thickness
+/louteuro {
+ 20 dict begin
+ /eurothick exch def
+ /euroheight exch def
+ /eurowidth exch def
+ /eurostrokewidth euroheight 0.8 mul def
+ /eurostep eurothick 60 cos mul 60 sin div def
+ /eurotheta 40 def
+
+ % llx lly width thickness louteurobox -
+ % draw angled box starting at (llx, lly) with given width and thickness
+ /louteurobox
+ {
+ /euroboxthick exch def
+ /euroboxwidth exch def
+ newpath moveto euroboxwidth 0 rlineto
+ eurostep euroboxthick rlineto
+ euroboxwidth neg 0 rlineto closepath fill
+ } def
+
+ % lower cross stroke
+ 0 euroheight 2 div eurothick 1.5 mul sub
+ eurostrokewidth eurothick louteurobox
+
+ % upper cross stroke
+ 0 euroheight 2 div eurothick 0.5 mul add
+ eurostrokewidth eurostep 2 mul add eurothick louteurobox
+
+ % circular part
+ /eurohctr eurowidth euroheight 2 div eurotheta cos mul sub def
+ /eurovctr euroheight 2 div def
+ newpath
+ eurohctr eurovctr eurovctr eurotheta 350 eurotheta sub arc
+ eurohctr eurovctr eurovctr eurothick sub 365 eurotheta sub eurotheta arcn
+ closepath fill
+ end
+} def
+
+% path for @FullWidthRule symbol
+/LoutRule
+{ 0 0 moveto xsize 0 lineto
+} def
+
+% path for @Box symbol
+/LoutBox
+{ 0 0 moveto xsize 0 lineto
+ xsize ysize lineto 0 ysize lineto
+ closepath
+} def
+
+% path for @CurveBox symbol
+/LoutCurveBox
+{ xmark 0 moveto
+ xsize xmark sub xmark xmark 270 360 arc
+ xsize xmark sub ysize xmark sub xmark 0 90 arc
+ xmark ysize xmark sub xmark 90 180 arc
+ xmark xmark xmark 180 270 arc
+ closepath
+} def
+
+% path for @ShadowBox symbol
+/LoutShadowBox
+{ xmark 2 mul 0 moveto xsize 0 lineto
+ xsize ysize xmark 2 mul sub lineto
+ xsize xmark sub ysize xmark 2 mul sub lineto
+ xsize xmark sub xmark lineto
+ xmark 2 mul xmark lineto
+ closepath
+} def
+
+% set up dictionary containing margin note data: parity LoutMargSet -
+/LoutMargSet
+{ /LoutMargDict 12 dict def
+ LoutMargDict begin
+ /parity exch def
+ /matr matrix currentmatrix def
+ /rightx xsize def
+ /lefty ysize def % highest allowable point for top of next left note
+ /righty ysize def % highest allowable point for top of next right note
+ /max { 2 copy gt { pop } { exch pop } ifelse } def
+ /min { 2 copy lt { pop } { exch pop } ifelse } def
+ end
+} def
+
+%translate coordinate system for marginal notes: type LoutMargShift -
+% where type 0 is left margin, 1 is right margin, 2 is outer, 3 is inner
+/LoutMargShift
+{ LoutMargDict begin
+
+ % y coordinate of top of note, in margin coords, before vertical adjust
+ 0 ysize transform matr itransform exch pop
+
+ % decide whether left or right margin based on type and parity
+ exch [ 0 1 parity 1 parity sub ] exch get 0 eq
+ {
+ % left margin: adjust top of note downwards if overlaps previous note
+ lefty min
+
+ % bottom of note is new lefty position and also translate position
+ ysize sub dup /lefty exch def
+
+ % want right edge of note at coordinate zero
+ xsize neg exch
+ }
+ {
+ % right margin: adjust top of note downwards if overlaps previous note
+ righty min
+
+ % bottom of note is new righty position and also translate position
+ ysize sub dup /righty exch def
+
+ % want left edge of note at coordinate rightx
+ rightx exch
+ } ifelse
+
+ % stack now contains coord of bottom left corner in margin coordinates
+ matr setmatrix translate
+ end
+} def
+
+% create LoutPageDict with left, right, foot, top for @Place symbol users
+/LoutPageSet
+{
+ /LoutPageDict 5 dict def
+ LoutPageDict begin
+ /matr matrix currentmatrix def
+ /left 0 def
+ /right xsize def
+ /foot 0 def
+ /top ysize def
+ end
+
+} def
+
+%%EndResource
+
+%%EndProlog
+
+%%BeginSetup
+%%IncludeResource: font Times-Roman
+/Times-Romanfnt82 vec2 /Times-Roman LoutRecode
+/fnt82 { /Times-Romanfnt82 LoutFont } def
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+
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+grestore
+
+grestore
+
+grestore
+
+pgsave restore
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+
+%%Trailer
+%%DocumentNeededResources: font Helvetica
+%%+ font Helvetica-Oblique
+%%+ font Symbol
+%%+ font Times-Roman
+%%+ font Times-Italic
+%%+ font Times-Bold
+%%DocumentSuppliedResources: procset LoutStartUp
+%%+ procset LoutTabPrependGraphic
+%%+ procset LoutFigPrependGraphic
+%%+ procset LoutGraphPrependGraphic
+%%+ procset LoutBasicSetup
+%%+ encoding vec2
+%%Pages: 42
+%%EOF
diff --git a/doc/user/README b/doc/user/README
index 0fc5704..0cf3731 100644
--- a/doc/user/README
+++ b/doc/user/README
@@ -34,4 +34,4 @@ A copy of the final PostScript output file (A4 paper size) is
stored at "ftp://ftp.cs.su.oz.au/jeff/lout/lout-3.19.user.ps.gz".
Jeffrey H. Kingston
-9 March 2000
+8 April 2000
diff --git a/doc/user/all b/doc/user/all
index a4bb049..64eaf96 100644
--- a/doc/user/all
+++ b/doc/user/all
@@ -7,6 +7,7 @@
@SysInclude { diag }
@SysInclude { cprint }
@SysInclude { eiffel }
+@SysInclude { perl }
@SysInclude { book }
# @Include { letterbook } # for testing Letter size formatting
@@ -20,8 +21,8 @@ Lout
Document Formatting System
}
@Author { Jeffrey H. Kingston }
- @Edition { Version 3.19
-March, 2000 }
+ @Edition { Version 3.20
+April, 2000 }
@Publisher {
Copyright @CopyRight 1991, 2000 Jeffrey H. Kingston,
Basser Department of Computer Science,
@@ -42,7 +43,7 @@ The University of Sydney 2006, Australia. ISBN 0 86758 951 5.
@Include { bgr }
@Include { dia }
@Include { gra }
-@Include { cpp }
+@Include { prg }
@Include { pascal }
@Include { ap_qck }
@Include { ap_byp }
diff --git a/doc/user/cpp_chan b/doc/user/cpp_chan
deleted file mode 100644
index bee0493..0000000
--- a/doc/user/cpp_chan
+++ /dev/null
@@ -1,91 +0,0 @@
-@Section
- @Title { Changing the appearance of all programs simultaneously }
- @Tag { cpsetup }
-@Begin
-@PP
-We have just seen that the {@Code "@CP"}, {@Code "@Eiffel"} etc. symbols
-have many options for changing the appearance of the program text. However,
-most people would not want to have a different style for every program text
-in their document; they want to define the style once at the start, and have
-all their program texts come out in that style without laboriously setting
-options on every symbol. You do this by copying the setup file and
-changing it.
-@PP
-For general information about how to make your own setup file, consult
-Section {@NumberOf setup}. The options that determine the default
-values are in the @Code "@Use" clause which occupies most of the setup
-file. Here is the @Code "@Use" clause from {@Code cprint}:
-cprint. @Index @Code "@CPSetup"
-@ID @Code @Tbl
- mv { 0.5vx }
- aformat { @Cell A | @Cell B | @Cell C }
- bformat { @Cell { " #" A } | @Cell { "{" B } | @Cell "}" }
-{
-@Rowa A { "@Use { @CPSetup" }
-@Rowb A { "pipe" } B { }
-@Rowb A { "style" } B { fixed }
-
-@Rowa
-@Rowb A { "fixedfont" } B { Courier }
-@Rowb A { "fixedstrings" } B { Base }
-@Rowb A { "fixedidentifiers" } B { Base }
-@Rowb A { "fixedcomments" } B { Base }
-@Rowb A { "fixedkeywords" } B { Base }
-@Rowb A { "fixednumbers" } B { Base }
-@Rowb A { "fixedoperators" } B { Base }
-@Rowb A { "fixedsize" } B { -1.0p }
-@Rowb A { "fixedline" } B { 1.0vx }
-@Rowb A { "fixedtabin" } B { 8 }
-@Rowb A { "fixedtabout" } B { 8s }
-
-@Rowa
-@Rowb A { "varyingfont" } B { }
-@Rowb A { "varyingstrings" } B { Slope }
-@Rowb A { "varyingidentifiers" } B { Slope }
-@Rowb A { "varyingcomments" } B { Base }
-@Rowb A { "varyingkeywords" } B { Bold }
-@Rowb A { "varyingnumbers" } B { Base }
-@Rowb A { "varyingoperators" } B { Base }
-@Rowb A { "varyingsize" } B { 1.0f }
-@Rowb A { "varyingline" } B { 1.0vx }
-@Rowb A { "varyingtabin" } B { 8 }
-@Rowb A { "varyingtabout" } B { 3f }
-
-@Rowa
-@Rowb A { "symbolfont" } B { }
-@Rowb A { "symbolstrings" } B { Slope }
-@Rowb A { "symbolidentifiers" } B { Slope }
-@Rowb A { "symbolcomments" } B { Base }
-@Rowb A { "symbolkeywords" } B { Bold }
-@Rowb A { "symbolnumbers" } B { Base }
-@Rowb A { "symboloperators" } B { Base }
-@Rowb A { "symbolsize" } B { 1.0f }
-@Rowb A { "symbolline" } B { 1.0vx }
-@Rowb A { "symboltabin" } B { 8 }
-@Rowb A { "symboltabout" } B { 3f }
-
-@Rowa A { "}" }
-}
-This shows the default font families, font faces, font sizes, line
-spacings, and tab settings in force for the three styles, and also that
-the default style is {@Code "fixed"}. Notice that the font family name
-for @Code "fixed" style is {@Code "Courier"}, but for the other styles is
-empty. This causes the @Code "fixed" style to always switch to Courier,
-and the other styles to use the same font family as in the surrounding
-document. The @Code pipe option will be explained in Section {@NumberOf pipes}.
-@PP
-To change a default value, delete the preceding @Code "#" and change the
-part between braces. For example, suppose you are happy with @Code "fixed"
-except that you want bold keywords. Then one line needs to be changed, to
-@ID @Code "fixedkeywords { Bold }"
-Or suppose you like @Code "varying" as it stands, but would like it to be
-the default style rather than {@Code "fixed"}. Again, only one line needs
-to be changed, to {@Code "style { varying }"}.
-@PP
-The setup files for the other languages are identical to this one, except
-that the symbol after @Code "@Use" is different, and some of the
-default values may be different. Changing an option affects only the
-language of that setup file; if you have multiple languages you can
-have multiple setup files and change their options quite independently
-of each other.
-@End @Section
diff --git a/doc/user/preface b/doc/user/preface
index 3634a89..2f258eb 100644
--- a/doc/user/preface
+++ b/doc/user/preface
@@ -18,7 +18,7 @@ gnu. @Index { GNU Public License }
primary source is directory
@ID @Code "ftp://ftp.cs.usyd.edu.au/jeff/lout"
in which may be found a gzipped tar file containing the main distribution
-(currently {@Code "lout-3.19.tar.gz"}), and various other things including
+(currently {@Code "lout-3.20.tar.gz"}), and various other things including
a PostScript version of this guide. The distribution contains source code,
libraries, documentation, license, and installation instructions.
@PP
diff --git a/doc/user/cpp b/doc/user/prg
index 0e7748a..ec473aa 100644
--- a/doc/user/cpp
+++ b/doc/user/prg
@@ -30,6 +30,8 @@ At the time of writing, the available programming languages are:
eiffel. @Index { Eiffel program printing }
c. @Index { C and C++ program printing }
blue. @Index { Blue program printing }
+perl. @Index { Perl program printing }
+pod. @Index { Pod (for Perl) printing }
@CD @Tbl
mv { 0.5vx }
af { Italic }
@@ -61,26 +63,41 @@ blue. @Index { Blue program printing }
C { "@Blue" }
D { varying }
E { Yes }
+@Rowb
+ A { Perl }
+ B { perl }
+ C { "@Perl" }
+ D { fixed }
+ E { No }
+@Rowb
+ A { Pod }
+ B { pod }
+ C { "@Pod" }
+ D { varying }
+ E { No }
}
C and C++ are handled together since, for formatting purposes, they
differ only in that C++ has some additional keywords plus an extra
way to make comments. Whenever we mention C from now on, we mean
-both C and C++. The second to fifth columns of this table will be
+both C and C++. See Section {@NumberOf prg_perl} for more on Perl
+and its handmaiden Pod. The second to fifth columns of this table will be
explained at various points later in this chapter.
@PP
The list of languages is likely to expand, because the @Code "prg2lout"
-program has been designed to make it easy to add new languages. Consult
-the instructions at the top of the source file of that program if you
-want to try it yourself.
+program has been designed to make it relatively easy to add new languages
+(you don't have to write executable code, just declare a lot of records
+describing your language). Consult the instructions at the top of the
+source file of that program ({@I prg2lout.c}) if you want to try it yourself.
@BeginSections
-@Include { cpp_lone }
-@Include { cpp_embe }
-@Include { cpp_opti }
-@Include { cpp_chan }
-@Include { cpp_tabs }
-@Include { cpp_comm }
-@Include { cpp_prog }
-@Include { cpp_pipe }
-@Include { cpp_erro }
+@Include { prg_lone }
+@Include { prg_embe }
+@Include { prg_opti }
+@Include { prg_chan }
+@Include { prg_tabs }
+@Include { prg_comm }
+@Include { prg_prog }
+@Include { prg_pipe }
+@Include { prg_erro }
+@Include { prg_perl }
@EndSections
@End @Chapter
diff --git a/doc/user/prg_chan b/doc/user/prg_chan
new file mode 100644
index 0000000..6273b7d
--- /dev/null
+++ b/doc/user/prg_chan
@@ -0,0 +1,108 @@
+@Section
+ @Title { Changing the appearance of all programs simultaneously }
+ @Tag { cpsetup }
+@Begin
+@PP
+We have just seen that the {@Code "@CP"}, {@Code "@Eiffel"} etc. symbols
+have many options for changing the appearance of the program text. However,
+most people would not want to have a different style for every program text
+in their document; they want to define the style once at the start, and have
+all their program texts come out in that style without laboriously setting
+options on every symbol. You do this by copying the setup file and
+changing it.
+@PP
+For general information about how to make your own setup file, consult
+Section {@NumberOf setup}. The options that determine the default
+values are in the @Code "@Use" clause which occupies most of the setup
+file. Here is part of the @Code "@Use" clause from {@Code cprint}:
+cprint. @Index @Code "@CPSetup"
+@ID @Code @Tbl
+ mv { 0.5vx }
+ aformat { @Cell A | @Cell B | @Cell C }
+ bformat { @Cell { " #" A } | @Cell { "{" B } | @Cell "}" }
+{
+@Rowa A { "@Use { @CPSetup" }
+@Rowb A { "pipe" } B { }
+@Rowb A { "style" } B { fixed }
+
+@Rowa
+@Rowb A { "fixedfont" } B { Courier }
+@Rowb A { "fixedsize" } B { -1.0p }
+@Rowb A { "fixedline" } B { 1.0vx }
+@Rowb A { "fixedtabin" } B { 8 }
+@Rowb A { "fixedtabout" } B { 8s }
+
+@Rowa
+@Rowb A { "fixedidentifiers" } B { Base }
+@Rowb A { "fixedkeywords" } B { Base }
+@Rowb A { "fixedoperators" } B { Base }
+@Rowb A { "fixednumbers" } B { Base }
+@Rowb A { "fixedstrings" } B { Base }
+@Rowb A { "fixedcomments" } B { Base }
+
+@Rowa
+@Rowb A { "fixedidentifiersformat" } B { "@Body" }
+@Rowb A { "fixedkeywordsformat" } B { "@Body" }
+@Rowb A { "fixedoperatorsformat" } B { "@Body" }
+@Rowb A { "fixednumbersformat" } B { "@Body" }
+@Rowb A { "fixedstringsformat" } B { "@Body" }
+@Rowb A { "fixedcommentsformat" } B { "@Body" }
+
+@Rowa
+@Rowa A { "..." }
+
+@Rowa
+@Rowa A { "}" }
+}
+The @Code pipe option will be explained in Section {@NumberOf pipes}. The
+options whose name begins with @Code "fixed" apply only when
+@Code style is {@Code fixed}; there are corresponding options, not
+shown, which apply when @Code style is {@Code varying} and {@Code symbol}.
+@PP
+We can see in this extract that the default value of @Code style is
+{@Code fixed}. We can also see the default font family, font face, font size,
+line spacing, and tab settings when the style is {@Code "fixed"}. The
+font family name for @Code "fixed" style is {@Code "Courier"}, but for the
+other styles (not shown) it is empty. This causes the @Code "fixed" style
+to always switch to Courier, and the other styles to use the same font
+family as in the surrounding document.
+@PP
+The @Code fixedidentifiersformat option allows you to make a more
+radical change to the format of identifiers than just the font. Within
+this option, @Code "@Body" stands for the identifier being formatted, and
+by applying Lout symbols to it, you apply them to every identifier. For
+example,
+@ID @Code "fixedidentifiersformat { red @Colour @Body }"
+will cause identifiers to be printed red.
+@FootNote {
+@Code "@Colour" is not a Lout primitive like, say, {@Code "@Font"}; it is
+defined when you write @Code "@SysInclude { doc }" or the equivalent for
+the other document types. This is true of quite a few generally useful
+symbols, including {@Code "@Box"} and {@Code "@I"}. If you want to use
+these symbols here, you must include your setup file @I after
+@Code "@SysInclude { doc }" or whatever, the reverse of the usual
+arrangement, so that they are defined before Lout reads your setup
+file. This reversal is carried out automatically when formatting
+programs independently of any document, so you can use these symbols
+in a setup file given by a @Code { -S } command line flag.
+} If you do use exotic formats, remember that in some programming languages,
+comments and even strings may occupy more than one line: {@Code "@Box"},
+for example, will give a logical but probably unwanted result when
+formatting a multi-line string.
+@PP
+As always with setup files, to change a default value, delete the preceding
+@Code "#" and change the part between braces. For example, suppose you are
+happy with @Code "fixed" except that you want bold keywords. Then one line
+needs to be changed, to
+@ID @Code "fixedkeywords { Bold }"
+Or suppose you like @Code "varying" as it stands, but would like it to be
+the default style rather than {@Code "fixed"}. Again, only one line needs
+to be changed, to {@Code "style { varying }"}.
+@PP
+The setup files for the other languages are identical to this one, except
+that the symbol after @Code "@Use" is different, and some of the
+default values may be different. Changing an option affects only the
+language of that setup file; if you have multiple languages you can
+have multiple setup files and change their options quite independently
+of each other.
+@End @Section
diff --git a/doc/user/cpp_comm b/doc/user/prg_comm
index 96ac110..a679f4f 100644
--- a/doc/user/cpp_comm
+++ b/doc/user/prg_comm
@@ -16,7 +16,7 @@ formfeed. @Index { formfeed in program texts }
character, control-L, without any comment; whatever the language, a formfeed
in program text is taken to be a request to start a new page.) Or, to
make a heading in an Eiffel program, do this:
-@ID @Code "--@ @Display @Heading { treeprint() }"
+@ID @Code "--@ @Display @Heading { treeprint }"
(Eiffel comments begin with @Code "--" and end at the end of the
line.) Other possible uses for this feature include index entries and
margin notes. Incredible as it may seem, you can even write
diff --git a/doc/user/cpp_embe b/doc/user/prg_embe
index 0cefc84..cfa84d4 100644
--- a/doc/user/cpp_embe
+++ b/doc/user/prg_embe
@@ -66,8 +66,7 @@ equivalent for other languages), so that Lout does not confuse program
braces with Lout braces. In that case the program text must not
contain {@Code "@End"}; and in either case the program text must not
include @Code "@Include" or @Code "@SysInclude" unless you are really
-including a file at that point (which is allowed, and follows the
-rules given for @Code "@Verbatim" in Section {@NumberOf verbatim}).
+including a file at that point (Section {@NumberOf pipes}).
@PP
If your Lout document contains program texts in several languages,
simply add one @Code "@SysInclude" line for each of them and proceed
@@ -77,6 +76,6 @@ a viable alternative is
These symbols cause the text between braces to be set verbatim in
a fixed-width font, as explained elsewhere in this guide. This fallback
method will not handle tab and formfeed characters very well. Again,
-use @Code "@Begin" and @Code "@End @Verbatim" instead of braces if
-your program text contains unbalanced braces.
+use @Code "@Verbatim @Begin ... @End @Verbatim" if your program text
+contains unbalanced braces.
@End @Section
diff --git a/doc/user/cpp_erro b/doc/user/prg_erro
index ff89591..7ebbe3e 100644
--- a/doc/user/cpp_erro
+++ b/doc/user/prg_erro
@@ -27,7 +27,7 @@ line number, and column number pointing to the Lout symbol
({@Code "@CP"}, {@Code "@Eiffel"} etc.) whose program text caused the
error message, like this:
@ID @Code @Verbatim {
-lout file "cpp_tabs" (from "cpp" line 80, from "all" line 45):
+lout file "prg_tabs" (from "prg" line 96, from "all" line 46):
56,23: prg2lout 2,1: program text ended within comment
}
This is an actual message produced when formatting this chapter. The
diff --git a/doc/user/cpp_lone b/doc/user/prg_lone
index a377d86..1717998 100644
--- a/doc/user/cpp_lone
+++ b/doc/user/prg_lone
@@ -31,6 +31,11 @@ Select an inter-line spacing size in Lout units. The default is
@Code -v1.1fx meaning 1.1 times the font size measured from baseline
to baseline.
}
+@TI { {@Code -S}{@I file} } {
+Use @I file as the setup file for printing your language. This allows
+you to change all the options mentioned in subsequent sections, rather
+than just the few given here.
+}
@EndList
There are also {@Code -t} and {@Code -T} options for dealing with tab
characters (Section {@NumberOf tabs}).
diff --git a/doc/user/cpp_opti b/doc/user/prg_opti
index 538bda2..9eb1818 100644
--- a/doc/user/cpp_opti
+++ b/doc/user/prg_opti
@@ -1,6 +1,6 @@
@Section
@Title { Changing the appearance of a program }
- @Tag { cpp_opti }
+ @Tag { prg_opti }
@Begin
@PP
The {@Code "@CP"}, {@Code "@Eiffel"} etc. symbols have a number of
@@ -69,37 +69,33 @@ default values:
"@CP [ or @Eiffel, @Blue, etc. ]"
" style { fixed }"
" font { Courier }"
-" strings { Base }"
-" identifiers { Base }"
-" comments { Base }"
-" keywords { Base }"
-" numbers { Base }"
-" operators { Base }"
" size { -1.0p }"
" line { 1.0vx }"
" tabin { 8 }"
" tabout { 8s }"
+" identifiers { Base }"
+" keywords { Base }"
+" operators { Base }"
+" numbers { Base }"
+" strings { Base }"
+" comments { Base }"
"{"
" ..."
"}"
}
We are already familiar with {@Code "style"}. After that comes
-{@Code "font"}, which determines the font family to use, followed
-by six options giving the particular faces within that family in which to
-print strings, identifiers, comments, keywords, numbers, and
-operators. {@Code "Base"} means the basic face; other commonly available
-choices are {@Code "Slope"} and {@Code "Bold"}. These options may all be
-set to different faces if desired. The default values shown are correct
-for @Code "style { fixed }" only; the other styles have other defaults
-(Section {@NumberOf cpsetup}).
-@PP
-The @Code "size" option is the font size to use, and @Code "line" is the
-inter-line spacing. The default values specify that @Code "size" is
-to be one point smaller than in the surrounding document; this was done
-to compensate for Courier's relatively large appearance compared
-to other fonts of the same nominal size. Again, these defaults are
-different for different values of {@Code "style"}.
+{@Code "font"}, which determines the font family to use, {@Code "size"},
+the font size to use, and {@Code "line"}, the inter-line spacing. The
+default value for @Code "size" asks for one point smaller than in the
+surrounding document; this was done to compensate for Courier's relatively
+large appearance compared to other fonts of the same nominal size.
@PP
The @Code "tabin" and @Code "tabout" options are the subject of
-Section {@NumberOf tabs}.
+Section {@NumberOf tabs}. After them come six options giving the
+particular font faces in which to print identifiers, keywords, operators,
+numbers, strings, and comments. {@Code "Base"} means the basic face; other
+commonly available choices are {@Code "Slope"} and {@Code "Bold"}. These
+options may all be set to different faces if desired. The default values
+shown are correct for @Code "style { fixed }" only; the other styles
+have other defaults (Section {@NumberOf cpsetup}).
@End @Section
diff --git a/doc/user/prg_perl b/doc/user/prg_perl
new file mode 100644
index 0000000..4a14860
--- /dev/null
+++ b/doc/user/prg_perl
@@ -0,0 +1,108 @@
+@Section
+ @Title { Notes on Perl and Pod }
+ @Tag { prg_perl }
+@Begin
+@PP
+The Perl programming language
+@FootNote { My thanks to Mark Summerfield for help with Perl and Pod. }
+is quite a difficult one for the @Code { prg2lout } program to deal with,
+and our boast that programs can be included with `absolutely no
+modifications' is not quite true for Perl.
+@PP
+Here is the complete list of problem areas. In most cases their
+effect is to get the formatting wrong over a short region, which is not
+perhaps so disastrous; and it should be easy to modify your Perl program
+without changing its meaning, to work around these problems. After all,
+in Perl there is always more than one way to do it.
+@NumberedList
+
+@LI {
+@I Here-documents such as
+@ID @Verbatim {
+<<"EOF"
+These lines will be read as though
+enclosed in double quotes
+EOF
+}
+will be handled correctly only if the string appearing immediately after
+the @Perl { << } operator (that is, the string used to terminate the
+here-document) is one of @Perl { EOF }, @Perl { EOT }, @Perl { END },
+and the empty string, all optionally enclosed in quotes of any of the
+three kinds. If this condition is not met, then the here-document will
+be treated as Perl program text. If the condition is met, there is still
+another problem: everything after the @Perl { << } symbol on the same
+line will be treated (incorrectly) as a string; the worst consequence
+of this is that stacked here-documents will not be printed properly.
+}
+
+@LI {
+When @Code { prg2lout } is scanning the program text looking for the
+beginning of a lexical unit, it may come upon a @Code "/" character,
+and this @I initial @Code "/" (not subsequent ones in the same lexical
+unit) it finds difficult to interpret, since it may be the beginning
+of a regular expression, to be formatted like a string, or it may be a
+complete lexical unit denoting division. The program chooses the regular
+expression (or equivalently, string) interpretation if the @Code "/"
+character is immediately preceded by @Code { "q" }, @Code { "qq" },
+@Code { "qx" }, @Code { "qw" }, @Code { "qr" }, @Code { "m" },
+@Code { "s" }, @Code { "y" }, or @Code { "tr" }. It also chooses the
+regular expression interpretation if the @Code "/" character appears
+at the start of a line, or if it is
+immediately preceded by zero, one, or two space or tab characters, which
+are themselves immediately preceded by a complete lexical unit which is
+one of @Code { "(" }, @Code { "=" }, @Code { "=~" }, @Code { "!~" },
+@Code { "split" }, @Code { "if" }, @Code { "not" }, @Code { "unless" },
+@Code { "for" }, @Code { "foreach" }, and @Code { "while" }. Otherwise
+it chooses the division interpretation. In the rare cases where this
+rule fails, you can force @Code { prg2lout } to choose the regular expression
+interpretation by placing an @Code { m } in front of the initial @Code "/"
+(this does not change the meaning of the program), and you can force the
+division interpretation by placing at least three spaces before the
+@Code "/" character.
+}
+
+@LI {
+The @Code { prg2lout } program recognises complete substitution operators,
+such as @Code "s/abc/ABC/" and {@Code "s{abc}{ABC}"}, as individual lexical
+units, and it formats them as it does strings. However, its rule for
+deciding where these units end is rather simple-minded: at the start,
+it works out what character finishes the unit (in the examples above,
+@Code "/" and @Code "}" respectively), and scans along until it reaches
+the second occurrence of this character not preceded by the @Code "\\"
+escape character. This is inadequate in two respects. Firstly,
+@ID @Code "s{{}}{}"
+is a complete legal substitution expression in Perl, but @Code { prg2lout }
+will think it ends after the second {@Code "}"}, and so format the rest
+of it wrongly. Secondly, and more seriously,
+@ID @Code "s{abc}<ABC>"
+is also allowed in Perl, but @Code { prg2lout } does not understand that
+the finishing character can change in this way, so in this example it will
+keep scanning forever, looking for the second @Code "}" character, which is
+disastrous.
+}
+
+@EndList
+Further work may eliminate some of these problems.
+@PP
+The Pod language is used by Perl programmers for creating documentation,
+and may be found within Perl programs or standing alone. Lout supports
+both arrangements without any special action by the user. At the
+beginning of the @Code perl setup line, the following line has been placed:
+@ID @Code "@SysInclude { pod }"
+Thus, asking for Perl always gives you Pod as well. If you are using
+your own setup files for both languages, it is probably better to
+break this connection by deleting this line from your copy of the
+@Code perl setup file and placing
+@ID @Code {
+"@Include { mypod }"
+"@Include { myperl }"
+}
+at the start of your document in the usual way.
+@PP
+Because Pod is a documentation language rather than a programming
+language, the setup file options listed in Section {@NumberOf cpsetup}
+do not really apply. So for Pod only these have been discarded and replaced
+by a completely different set of options, controlling such things as
+the size of headings and the gaps between list items, which you can
+find documented in the @Code { pod } setup file.
+@End @Section
diff --git a/doc/user/cpp_pipe b/doc/user/prg_pipe
index afbb87e..afbb87e 100644
--- a/doc/user/cpp_pipe
+++ b/doc/user/prg_pipe
diff --git a/doc/user/cpp_prog b/doc/user/prg_prog
index a049e3d..8d343f6 100644
--- a/doc/user/cpp_prog
+++ b/doc/user/prg_prog
@@ -7,7 +7,7 @@ The standard reference for the Eiffel language @Cite { $meyer1992eiffel }
specifies that identifiers within comments may or should be enclosed
in ` and ' so that they may be noticed and printed in an italic
font:
-@ID lines @Break @F @Verbatim {
+@ID @Code @Verbatim {
@ID @Eiffel {
deposit(amount: REAL) is
-- deposit `amount' dollars
diff --git a/doc/user/cpp_tabs b/doc/user/prg_tabs
index 3a04bfa..3a04bfa 100644
--- a/doc/user/cpp_tabs
+++ b/doc/user/prg_tabs
diff --git a/doc/user/user.ps b/doc/user/user.ps
new file mode 100644
index 0000000..203f7e3
--- /dev/null
+++ b/doc/user/user.ps
@@ -0,0 +1,5202 @@
+%!PS-Adobe-3.0
+%%Creator: Basser Lout Version 3.19 (March 2000)
+%%CreationDate: Mon Apr 3 16:16:36 2000
+%%DocumentData: Binary
+%%DocumentNeededResources: (atend)
+%%DocumentSuppliedResources: (atend)
+%%DocumentMedia: A4 595 842 0 white ()
+%%PageOrder: Ascend
+%%Pages: (atend)
+%%BoundingBox: 0 0 595 842
+%%EndComments
+
+%%BeginProlog
+%%BeginResource: procset LoutStartUp
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+/mo { 3 1 roll moveto true charpath stroke } bind def
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+/k { exch neg 0 rmoveto show } bind def
+/ko { exch neg 0 rmoveto true charpath stroke } bind def
+/ul { gsave setlinewidth dup 3 1 roll
+ moveto lineto stroke grestore } bind def
+/in { 1440 mul } def
+/cm { 567 mul } def
+/pt { 20 mul } def
+/em { 120 mul } def
+/sp { louts mul } def
+/vs { loutv mul } def
+/ft { loutf mul } def
+/dg { } def
+
+/LoutGraphic {
+ /louts exch def
+ /loutv exch def
+ /loutf exch def
+ /ymark exch def
+ /xmark exch def
+ /ysize exch def
+ /xsize exch def
+} def
+
+/LoutGr2 { gsave translate LoutGraphic gsave } def
+
+/LoutFont
+{ findfont exch scalefont setfont
+} bind def
+
+/LoutRecode {
+ { findfont dup length dict begin
+ {1 index /FID ne {def} {pop pop} ifelse} forall
+ /Encoding exch def
+ currentdict end definefont pop
+ }
+ stopped pop
+} bind def
+
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+ /LoutEPSFState save def
+ /dict_count countdictstack def
+ /op_count count 1 sub def
+ userdict begin
+ /showpage { } def
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+ 1 setlinewidth 0 setlinejoin
+ 10 setmiterlimit [] 0 setdash newpath
+ /languagelevel where
+ { pop languagelevel
+ 1 ne
+ { false setstrokeadjust false setoverprint
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+ } if
+} bind def
+
+/EndEPSF {
+ count op_count sub { pop } repeat
+ countdictstack dict_count sub { end } repeat
+ LoutEPSFState restore
+} bind def
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+%%BeginResource: encoding vec2
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+/P /Q /R /S /T /U /V /W
+/X /Y /Z /bracketleft /backslash /bracketright /asciicircum /underscore
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+/eth /ntilde /ograve /oacute /ocircumflex /otilde /odieresis /divide
+/oslash /ugrave /uacute /ucircumflex /udieresis /yacute /thorn /ydieresis
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+%%EndResource
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+%%BeginResource: procset LoutTabPrependGraphic
+% @PrependGraphic file /export/home/6monthspace/jeff/lout.lib/include/tabf.lpg
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+% %
+% PostScript @SysPrependGraphic file for @Tab %
+% %
+% To assist in avoiding name clashes, the names %
+% of all these symbols begin with "ltab". %
+% %
+% Jeffrey H. Kingston %
+% 24 September 1991 %
+% 22 December 1992 %
+% %
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+% linewidth ltabhs -
+% horizontal single line
+/ltabhs
+{ 0 0 moveto xsize 0 lineto
+ setlinewidth 0 setlinecap stroke
+} def
+
+% linewidth ltabhsp -
+% horizontal single line with projecting ends
+/ltabhsp
+{ 0 0 moveto xsize 0 lineto
+ setlinewidth 2 setlinecap stroke
+} def
+
+% linewidth ltabhd -
+% horizontal double line
+/ltabhd
+{ dup dup
+ 0 0 moveto xsize 0 lineto
+ 0 exch 3 mul moveto xsize exch 3 mul lineto
+ setlinewidth 0 setlinecap stroke
+} def
+
+% linewidth ltabhdb -
+% horizontal double line below mark
+/ltabhdb
+{ dup dup
+ 0 0 moveto xsize 0 lineto
+ 0 exch -3 mul moveto xsize exch -3 mul lineto
+ setlinewidth 0 setlinecap stroke
+} def
+
+% linewidth ltabhdnw -
+% horizontal double line with northwest corner
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+{ dup dup dup dup
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+ xsize exch 3 mul moveto
+ -3 mul exch 3 mul lineto
+ -3 mul 0 lineto
+ setlinewidth 0 setlinejoin 2 setlinecap stroke
+} def
+
+% linewidth ltabhdne -
+% horizontal double line with northeast corner
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+{ dup dup dup dup
+ 0 0 moveto xsize 0 lineto
+ 0 exch 3 mul moveto
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+ setlinewidth 0 setlinejoin 2 setlinecap stroke
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+ 0 0 moveto xsize 0 lineto
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+
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+{ dup dup dup dup
+ 0 0 moveto xsize 0 lineto
+ 0 exch -3 mul moveto
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+
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+% vertical single line
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+{ 0 0 moveto 0 ysize lineto
+ setlinewidth 0 setlinecap stroke
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+
+% linewidth ltabvd -
+% vertical double line
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+{ dup dup
+ 0 0 moveto 0 ysize lineto
+ -3 mul 0 moveto -3 mul ysize lineto
+ setlinewidth 0 setlinecap stroke
+} def
+
+% linewidth ltabvdr -
+% vertical double line to right of mark
+/ltabvdr
+{ dup dup
+ 0 0 moveto 0 ysize lineto
+ 3 mul 0 moveto 3 mul ysize lineto
+ setlinewidth 0 setlinecap stroke
+} def
+%%EndResource
+
+%%BeginResource: procset LoutTblPrependGraphic
+% @PrependGraphic file /export/home/6monthspace/jeff/lout.lib/include/tblf.lpg
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+% %
+% PostScript @SysPrependGraphic file for @Tbl Jeffrey H. Kingston %
+% Version 1.0 June 1998 %
+% %
+% To assist in avoiding name clashes, the names of all symbols %
+% defined here begin with "ltbl". %
+% %
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+% painting (i.e. filling): - ltblwhite - (etc.)
+/ltblnopaint { } def
+/ltblnochange { fill } def
+/ltbldarkblue { 0.0 0.0 0.5 setrgbcolor fill } def
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+/ltblblack { 0.0 0.0 0.0 setrgbcolor fill } def
+/ltblwhite { 1.0 1.0 1.0 setrgbcolor fill } def
+%%EndResource
+
+%%BeginResource: procset LoutFigPrependGraphic
+% @PrependGraphic file /export/home/6monthspace/jeff/lout.lib/include/figf.lpg
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+% %
+% PostScript @SysPrependGraphic file for @Fig Jeffrey H. Kingston %
+% Version 2.0 (includes CIRCUM label) January 1992 %
+% %
+% To assist in avoiding name clashes, the names of all symbols %
+% defined here begin with "lfig". However, this is not feasible %
+% with user-defined labels and some labels used by users. %
+% %
+% <point> is two numbers, a point. %
+% <length> is one number, a length %
+% <angle> is one number, an angle in degrees %
+% <dashlength> is one number, the preferred length of a dash %
+% %
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+errordict begin
+ /handleerror
+ {
+ { /Times-Roman findfont 8 pt scalefont setfont
+ 0 setgray 4 pt 4 pt moveto
+ $error /errorname get
+ dup lfigdict exch known
+ { lfigdict exch get }
+ { 30 string cvs } ifelse
+ show
+ ( Command: ) show
+ $error /command get 30 string cvs show
+ } stopped {} if
+ showpage stop
+ } def
+end
+
+% concat strings: <string> <string> lfigconcat <string>
+% must be defined outside lfigdict since used in lfigpromotelabels
+/lfigconcat
+{ 2 copy length exch length add string
+ dup 0 4 index putinterval
+ dup 3 index length 3 index putinterval
+ 3 1 roll pop pop
+} def
+
+% <string> lfigdebugprint -
+% must be defined outside lfigdict since used in arbitrary places
+% /lfigdebugprint
+% { print
+% (; operand stack:\n) print
+% count copy
+% count 2 idiv
+% { ==
+% (\n) print
+% } repeat
+% (\n) print
+% } def
+
+/lfigdict 120 dict def
+lfigdict begin
+
+% error messages
+/dictfull (dictfull error: too many labels?) def
+/dictstackoverflow (dictstackoverflow error: labels nested too deeply?) def
+/execstackoverflow (execstackoverflow error: figure nested too deeply?) def
+/limitcheck (limitcheck error: figure nested too deeply or too large?) def
+/syntaxerror (syntaxerror error: syntax error in text of figure?) def
+/typecheck (typecheck error: syntax error in text of figure?) def
+/undefined (undefined error: unknown or misspelt label?) def
+/VMError (VMError error: run out of memory?) def
+
+% push pi onto stack: - lfigpi <num>
+/lfigpi 3.14159 def
+
+% arc directions
+/clockwise false def
+/anticlockwise true def
+
+% maximum of two numbers: <num> <num> lfigmax <num>
+/lfigmax { 2 copy gt { pop } { exch pop } ifelse } def
+
+% minimum of two numbers: <num> <num> lfigmin <num>
+/lfigmin { 2 copy lt { pop } { exch pop } ifelse } def
+
+% add two points: <point> <point> lfigpadd <point>
+/lfigpadd { exch 3 1 roll add 3 1 roll add exch } def
+
+% subtract first point from second: <point> <point> lfigpsub <point>
+/lfigpsub { 3 2 roll sub 3 1 roll exch sub exch } def
+
+% max two points: <point> <point> lfigpmax <point>
+/lfigpmax { exch 3 1 roll lfigmax 3 1 roll lfigmax exch } def
+
+% min two points: <point> <point> lfigpmin <point>
+/lfigpmin { exch 3 1 roll lfigmin 3 1 roll lfigmin exch } def
+
+% scalar multiplication: <point> <num> lfigpmul <point>
+/lfigpmul { dup 3 1 roll mul 3 1 roll mul exch } def
+
+% point at angle and distance: <point> <length> <angle> lfigatangle <point>
+/lfigatangle { 2 copy cos mul 3 1 roll sin mul lfigpadd } def
+
+% angle from one point to another: <point> <point> lfigangle <angle>
+/lfigangle { lfigpsub 2 copy 0 eq exch 0 eq and {pop} {exch atan} ifelse } def
+
+% distance between two points: <point> <point> lfigdistance <length>
+/lfigdistance { lfigpsub dup mul exch dup mul add sqrt } def
+
+% difference in x coords: <point> <point> lfigxdistance <length>
+/lfigxdistance { pop 3 1 roll pop sub } def
+
+%difference in y coords: <point> <point> lfigydistance <length>
+/lfigydistance { 3 1 roll pop sub exch pop } def
+
+% stroke a solid line: <length> <dashlength> lfigsolid -
+/lfigsolid
+{ pop pop [] 0 setdash stroke
+} def
+
+% stroke a lfigdashed line: <length> <dashlength> lfigdashed -
+/lfigdashed
+{ 2 copy div 2 le 1 index 0 le or
+ { exch pop 1 pt lfigmax [ exch dup ] 0 setdash }
+ { dup [ exch 4 2 roll 2 copy div
+ 1 sub 2 div ceiling dup 4 1 roll
+ 1 add mul sub exch div ] 0 setdash
+ } ifelse stroke
+} def
+
+% stroke a lfigcdashed line: <length> <dashlength> lfigcdashed -
+/lfigcdashed
+{ 2 copy le 1 index 0 le or
+ { exch pop 1 pt lfigmax [ exch dup ] dup 0 get 2 div setdash }
+ { dup [ 4 2 roll exch 2 copy exch div
+ 2 div ceiling div 1 index sub
+ ] exch 2 div setdash
+ } ifelse stroke
+} def
+
+% stroke a dotted line: <length> <dashlength> lfigdotted -
+/lfigdotted
+{ 2 copy le 1 index 0 le or
+ { exch pop 1 pt lfigmax [ exch 0 exch ] 0 setdash }
+ { 1 index exch div ceiling div
+ [ 0 3 2 roll ] 0 setdash
+ } ifelse stroke
+} def
+
+% stroke a noline line: <length> <dashlength> lfignoline -
+/lfignoline
+{ pop pop
+} def
+
+% painting (i.e. filling): - lfigwhite - (etc.)
+/lfignopaint { } def
+/lfignochange { fill } def
+/lfigdarkblue { 0.0 0.0 0.5 setrgbcolor fill } def
+/lfigblue { 0.0 0.0 1.0 setrgbcolor fill } def
+/lfiglightblue { 0.5 0.5 1.0 setrgbcolor fill } def
+/lfigdarkgreen { 0.0 0.5 0.0 setrgbcolor fill } def
+/lfiggreen { 0.0 1.0 0.0 setrgbcolor fill } def
+/lfiglightgreen { 0.5 1.0 0.5 setrgbcolor fill } def
+/lfigdarkred { 0.5 0.0 0.0 setrgbcolor fill } def
+/lfigred { 1.0 0.0 0.0 setrgbcolor fill } def
+/lfiglightred { 1.0 0.5 0.5 setrgbcolor fill } def
+/lfigdarkcyan { 0.0 0.5 0.5 setrgbcolor fill } def
+/lfigcyan { 0.0 1.0 1.0 setrgbcolor fill } def
+/lfiglightcyan { 0.5 1.0 1.0 setrgbcolor fill } def
+/lfigdarkmagenta { 0.5 0.0 0.5 setrgbcolor fill } def
+/lfigmagenta { 1.0 0.0 1.0 setrgbcolor fill } def
+/lfiglightmagenta { 1.0 0.5 1.0 setrgbcolor fill } def
+/lfigdarkyellow { 0.5 0.5 0.0 setrgbcolor fill } def
+/lfigyellow { 1.0 1.0 0.0 setrgbcolor fill } def
+/lfiglightyellow { 1.0 1.0 0.5 setrgbcolor fill } def
+/lfigdarkgray { 0.2 0.2 0.2 setrgbcolor fill } def
+/lfiggray { 0.5 0.5 0.5 setrgbcolor fill } def
+/lfiglightgray { 0.8 0.8 0.8 setrgbcolor fill } def
+/lfigdarkgrey { 0.2 0.2 0.2 setrgbcolor fill } def
+/lfiggrey { 0.5 0.5 0.5 setrgbcolor fill } def
+/lfiglightgrey { 0.8 0.8 0.8 setrgbcolor fill } def
+/lfigblack { 0.0 0.0 0.0 setrgbcolor fill } def
+/lfigwhite { 1.0 1.0 1.0 setrgbcolor fill } def
+
+% line caps (and joins, not currently used)
+/lfigbutt 0 def
+/lfiground 1 def
+/lfigprojecting 2 def
+/lfigmiter 0 def
+/lfigbevel 2 def
+
+% shape and labels of the @Box symbol
+/lfigbox
+{
+ 0 0 /SW lfigpointdef
+ xsize 0 /SE lfigpointdef
+ xsize ysize /NE lfigpointdef
+ 0 ysize /NW lfigpointdef
+ SE 0.5 lfigpmul /S lfigpointdef
+ NW 0.5 lfigpmul /W lfigpointdef
+ W SE lfigpadd /E lfigpointdef
+ S NW lfigpadd /N lfigpointdef
+ NE 0.5 lfigpmul /CTR lfigpointdef
+ [ CTR NE lfigpsub /lfigboxcircum cvx ] lfigcircumdef
+ SW SE NE NW SW
+} def
+
+% shape and labels of the @CurveBox symbol
+/lfigcurvebox
+{
+
+ xsize 0.5 mul ysize 0.5 mul /CTR lfigpointdef
+ xsize 0.5 mul 0 /S lfigpointdef
+ xsize ysize 0.5 mul /E lfigpointdef
+ xsize 0.5 mul ysize /N lfigpointdef
+ 0 ysize 0.5 mul /W lfigpointdef
+
+ xmark 0.293 mul xmark 0.293 mul /SW lfigpointdef
+ xsize xmark 0.293 mul sub xmark 0.293 mul /SE lfigpointdef
+ xsize xmark 0.293 mul sub ysize xmark 0.293 mul sub /NE lfigpointdef
+ xmark 0.293 mul ysize xmark 0.293 mul sub /NW lfigpointdef
+
+ [ xsize ysize 0.5 lfigpmul xmark /lfigcurveboxcircum cvx ] lfigcircumdef
+
+ xmark 0
+ xsize xmark sub 0
+ [ xsize xmark sub xmark ]
+ xsize xmark
+ xsize ysize xmark sub
+ [ xsize xmark sub ysize xmark sub ]
+ xsize xmark sub ysize
+ xmark ysize
+ [ xmark ysize xmark sub ]
+ 0 ysize xmark sub
+ 0 xmark
+ [ xmark xmark ]
+ xmark 0
+} def
+
+% shadow of the @ShadowBox symbol
+% its shape and labels are done, somewhat inaccurately, with lfigbox
+/lfigshadow
+{ xmark 2 mul 0 moveto xsize 0 lineto
+ xsize ysize xmark 2 mul sub lineto
+ xsize xmark sub ysize xmark 2 mul sub lineto
+ xsize xmark sub xmark lineto
+ xmark 2 mul xmark lineto closepath fill
+} def
+
+% shape and labels of the @Square symbol
+/lfigsquare
+{
+ xsize ysize 0.5 lfigpmul /CTR lfigpointdef
+ CTR xsize xsize ysize ysize lfigpmax 0.5 lfigpmul lfigpadd /NE lfigpointdef
+ CTR 0 0 CTR NE lfigdistance 135 lfigatangle lfigpadd /NW lfigpointdef
+ CTR 0 0 CTR NE lfigdistance 225 lfigatangle lfigpadd /SW lfigpointdef
+ CTR 0 0 CTR NE lfigdistance 315 lfigatangle lfigpadd /SE lfigpointdef
+ SW 0.5 lfigpmul SE 0.5 lfigpmul lfigpadd /S lfigpointdef
+ NW 0.5 lfigpmul NE 0.5 lfigpmul lfigpadd /N lfigpointdef
+ SW 0.5 lfigpmul NW 0.5 lfigpmul lfigpadd /W lfigpointdef
+ SE 0.5 lfigpmul NE 0.5 lfigpmul lfigpadd /E lfigpointdef
+ [ CTR NE lfigpsub /lfigboxcircum cvx ] lfigcircumdef
+ SW SE NE NW SW
+} def
+
+% shape and labels of the @Diamond symbol
+/lfigdiamond
+{
+ xsize 0 0.5 lfigpmul /S lfigpointdef
+ 0 ysize 0.5 lfigpmul /W lfigpointdef
+ S W lfigpadd /CTR lfigpointdef
+ CTR W lfigpadd /N lfigpointdef
+ CTR S lfigpadd /E lfigpointdef
+ [ xsize ysize 0.5 lfigpmul /lfigdiamondcircum cvx ] lfigcircumdef
+ S E N W S
+} def
+
+% shape and labels of the @Ellipse symbol
+/lfigellipse
+{
+ xsize 0 0.5 lfigpmul /S lfigpointdef
+ 0 ysize 0.5 lfigpmul /W lfigpointdef
+ S W lfigpadd /CTR lfigpointdef
+ CTR W lfigpadd /N lfigpointdef
+ CTR S lfigpadd /E lfigpointdef
+ CTR xsize 0 0.3536 lfigpmul lfigpadd 0 ysize 0.3536 lfigpmul lfigpadd /NE lfigpointdef
+ 0 ysize 0.3536 lfigpmul CTR xsize 0 0.3536 lfigpmul lfigpadd lfigpsub /SE lfigpointdef
+ xsize 0 0.3536 lfigpmul CTR lfigpsub 0 ysize 0.3536 lfigpmul lfigpadd /NW lfigpointdef
+ 0 ysize 0.3536 lfigpmul xsize 0 0.3536 lfigpmul CTR lfigpsub lfigpsub /SW lfigpointdef
+ [ xsize ysize 0.5 lfigpmul /lfigellipsecircum cvx ] lfigcircumdef
+ S [ CTR ] E [ CTR ] N [ CTR ] W [ CTR ] S
+} def
+
+% shape and labels of the @Circle symbol
+/lfigcircle
+{
+ xsize ysize 0.5 lfigpmul /CTR lfigpointdef
+ CTR xsize 0 ysize 0 lfigpmax 0.5 lfigpmul lfigpadd /E lfigpointdef
+ CTR 0 0 CTR E lfigdistance 45 lfigatangle lfigpadd /NE lfigpointdef
+ CTR 0 0 CTR E lfigdistance 90 lfigatangle lfigpadd /N lfigpointdef
+ CTR 0 0 CTR E lfigdistance 135 lfigatangle lfigpadd /NW lfigpointdef
+ CTR 0 0 CTR E lfigdistance 180 lfigatangle lfigpadd /W lfigpointdef
+ CTR 0 0 CTR E lfigdistance 225 lfigatangle lfigpadd /SW lfigpointdef
+ CTR 0 0 CTR E lfigdistance 270 lfigatangle lfigpadd /S lfigpointdef
+ CTR 0 0 CTR E lfigdistance 315 lfigatangle lfigpadd /SE lfigpointdef
+ [ S E lfigpsub /lfigellipsecircum cvx ] lfigcircumdef
+ S [ CTR ] E [ CTR ] N [ CTR ] W [ CTR ] S
+} def
+
+% shape and labels of the @HLine and @HArrow symbols
+/lfighline
+{
+ 0 ymark lfigprevious /FROM lfigpointdef
+ xsize ymark lfigprevious /TO lfigpointdef
+} def
+
+% shape and labels of the @VLine and @VArrow symbols
+/lfigvline
+{
+ xmark ysize lfigprevious /FROM lfigpointdef
+ xmark 0 lfigprevious /TO lfigpointdef
+} def
+
+% points of a polygon around base with given no of sides, vert init angle:
+% <sides> <angle> figpolygon <point> ... <point>
+/lfigpolygon
+{ xsize ysize 0.5 lfigpmul /CTR lfigpointdef
+ 90 sub CTR 2 copy lfigmax 5 3 roll
+ [ 4 copy pop /lfigpolycircum cvx ] lfigcircumdef
+ exch dup 360 exch div exch
+ 1 1 3 2 roll
+ { 4 string cvs (P) exch lfigconcat cvn
+ 6 copy pop pop lfigatangle 2 copy 10 2 roll
+ 3 2 roll lfigpointdef
+ dup 3 1 roll add exch
+ } for
+ pop lfigatangle
+} def
+
+% next array element: <array> <index> lfiggetnext <array> <index> <any> true
+% or <array> <index> false
+/lfiggetnext
+{ 2 copy exch length ge
+ { false }
+ { 2 copy get exch 1 add exch true } ifelse
+} def
+
+% check whether thing is number: <any> lfigisnumbertype <any> <bool>
+/lfigisnumbertype
+{ dup type dup
+ /integertype eq exch /realtype eq or
+} def
+
+% check whether thing is an array: <any> lfigisarraytype <any> <bool>
+/lfigisarraytype { dup type /arraytype eq } def
+
+% get next item: <array> <index> lfiggetnextitem <array> <index> 0
+% or <array> <index> <array> 1
+% or <array> <index> <point> 2
+/lfiggetnextitem
+{ lfiggetnext
+ { lfigisarraytype
+ { 1
+ }
+ { lfigisnumbertype
+ { 3 1 roll
+ lfiggetnext
+ { lfigisnumbertype
+ { 4 3 roll exch 2
+ }
+ { pop 3 2 roll pop 0
+ } ifelse
+ }
+ { 3 2 roll pop 0
+ } ifelse
+ }
+ { pop 0
+ } ifelse
+ } ifelse
+ }
+ { 0
+ } ifelse
+} def
+
+% set arc path: bool x1 y1 x2 y2 x0 y0 lfigsetarc <angle> <angle> <dist>
+% the path goes from x1 y1 to x2 y2 about centre x0 y0,
+% anticlockwise if bool is true else clockwise.
+% The orientations of backwards pointing and forwards pointing
+% arrowheads are returned in the two angles, and
+% the length of the arc is returned in <dist>.
+/lfigsetarc
+{
+ 20 dict begin
+ matrix currentmatrix 8 1 roll
+ 2 copy translate 2 copy 8 2 roll
+ 4 2 roll lfigpsub 6 2 roll lfigpsub
+ dup /y1 exch def dup mul /y1s exch def
+ dup /x1 exch def dup mul /x1s exch def
+ dup /y2 exch def dup mul /y2s exch def
+ dup /x2 exch def dup mul /x2s exch def
+
+ y1s y2s eq
+ { -1
+ }
+ { y1s x2s mul y2s x1s mul sub y1s y2s sub div
+ } ifelse
+ /da exch def
+
+ x1s x2s eq
+ { -1
+ }
+ { x1s y2s mul x2s y1s mul sub x1s x2s sub div
+ } ifelse
+ /db exch def
+
+ da 0 gt db 0 gt and
+ { /LMax da sqrt db sqrt lfigmax def
+ /scalex da sqrt LMax div def
+ /scaley db sqrt LMax div def
+ scalex scaley scale
+ 0 0 LMax
+ 0 0 x1 scalex mul y1 scaley mul lfigangle
+ 0 0 x2 scalex mul y2 scaley mul lfigangle
+ 2 copy eq { 360 add } if
+ 2 copy 8 2 roll
+ 5 index { arc } { arcn } ifelse
+ 2 index 1 index
+ { 90 sub } { 90 add } ifelse
+ dup sin scaley mul exch cos scalex mul atan
+ 2 index 2 index
+ { 90 add } { 90 sub } ifelse
+ dup sin scaley mul exch cos scalex mul atan
+ 5 2 roll % res1 res2 ang1 ang2 anticlockwise
+ { exch sub } { sub } ifelse
+ dup 0 le { 360 add } if lfigpi mul LMax mul 180 div
+ }
+ { 0 0 x1 y1 lfigdistance 0 0 x2 y2 lfigdistance eq
+ 0 0 x1 y1 lfigdistance 0 gt and
+ { 0 0
+ 0 0 x1 y1 lfigdistance
+ 0 0 x1 y1 lfigangle
+ 0 0 x2 y2 lfigangle
+ 2 copy eq { 360 add } if
+ 2 copy 8 2 roll
+ 5 index { arc } { arcn } ifelse
+ 2 index 1 index
+ { 90 sub } { 90 add } ifelse
+ 2 index 2 index
+ { 90 add } { 90 sub } ifelse
+ 5 2 roll % res1 res2 ang1 ang2 clockwise
+ { exch sub } { sub } ifelse
+ dup 0 le { 360 add } if lfigpi mul 0 0 x1 y1 lfigdistance mul 180 div
+ }
+ { x2 y2 lineto pop
+ x2 y2 x1 y1 lfigangle
+ x1 y1 x2 y2 lfigangle
+ x1 y1 x2 y2 lfigdistance
+ } ifelse
+ } ifelse
+ 4 -1 roll setmatrix
+ end
+} def
+
+% lfigsetcurve: set up a Bezier curve from x0 y0 to x3 y3
+% and return arrowhead angles and length of curve (actually 0)
+% x0 y0 x1 y1 x2 y2 x3 y3 lfigsetcurve <angle> <angle> <length>
+/lfigsetcurve
+{ 8 copy curveto pop pop
+ lfigangle
+ 5 1 roll
+ 4 2 roll lfigangle
+ exch
+ 0
+} def
+
+% lfigpaintpath: paint a path of the given shape
+% /paint [ shape ] lfigpaintpath -
+/lfigpaintpath
+{
+ 10 dict begin
+ 0 newpath
+ /prevseen false def
+ /curveseen false def
+ { lfiggetnextitem
+ dup 0 eq { pop exit }
+ { 1 eq
+ { /curveseen true def
+ /curve exch def
+ curve length 0 eq { /curveseen false def } if
+ }
+ { /ycurr exch def
+ /xcurr exch def
+ prevseen
+ { curveseen
+ { curve length 4 eq
+ { xprev yprev
+ curve 0 get curve 1 get
+ curve 2 get curve 3 get
+ xcurr ycurr
+ lfigsetcurve pop pop pop
+ }
+ { xprev yprev xcurr ycurr
+ curve length 1 ge { curve 0 get } { 0 } ifelse
+ curve length 2 ge { curve 1 get } { 0 } ifelse
+ curve length 3 ge { curve 2 get } { true } ifelse
+ 7 1 roll
+ lfigsetarc pop pop pop
+ } ifelse
+ }
+ { xcurr ycurr lineto
+ } ifelse
+ }
+ { xcurr ycurr moveto
+ } ifelse
+ /xprev xcurr def
+ /yprev ycurr def
+ /prevseen true def
+ /curveseen false def
+ } ifelse
+ } ifelse
+ } loop pop pop cvx exec
+ end
+} def
+
+% stroke a path of the given shape in the given linestyle and dash length.
+% Return the origin and angle of the backward and forward arrow heads.
+% dashlength /linestyle [shape] lfigdopath [<point> <angle>] [<point> <angle>]
+/lfigdopath
+{
+ 10 dict begin
+ 0
+ /prevseen false def
+ /curveseen false def
+ /backarrow [] def
+ /fwdarrow [] def
+ {
+ lfiggetnextitem
+ dup 0 eq { pop exit }
+ {
+ 1 eq
+ { /curveseen true def
+ /curve exch def
+ curve length 0 eq { /prevseen false def } if
+ }
+ { /ycurr exch def
+ /xcurr exch def
+ prevseen
+ { newpath xprev yprev moveto
+ curveseen
+ { curve length 4 eq
+ { xprev yprev
+ curve 0 get curve 1 get
+ curve 2 get curve 3 get
+ xcurr ycurr lfigsetcurve
+ }
+ { xprev yprev xcurr ycurr
+ curve length 1 ge { curve 0 get } { 0 } ifelse
+ curve length 2 ge { curve 1 get } { 0 } ifelse
+ curve length 3 ge { curve 2 get } { true } ifelse
+ 7 1 roll
+ lfigsetarc
+ } ifelse
+ }
+ { xcurr ycurr lineto
+ xcurr ycurr xprev yprev lfigangle dup 180 sub
+ xprev yprev xcurr ycurr lfigdistance
+ } ifelse
+ 6 index 6 index cvx exec
+ [ xprev yprev 5 -1 roll ]
+ backarrow length 0 eq
+ { /backarrow exch def }
+ { pop } ifelse
+ [ xcurr ycurr 4 -1 roll ] /fwdarrow exch def
+ } if
+ /xprev xcurr def
+ /yprev ycurr def
+ /prevseen true def
+ /curveseen false def
+ } ifelse
+ } ifelse
+ } loop
+ pop pop pop pop
+ backarrow length 0 eq { [ 0 0 0 ] } { backarrow } ifelse
+ fwdarrow length 0 eq { [ 0 0 0 ] } { fwdarrow } ifelse
+ end
+} def
+
+% lfigdoarrow: draw an arrow head of given form
+% dashlength /lstyle /pstyle hfrac height width [ <point> <angle> ] lfigdoarrow -
+/lfigdoarrow
+{ matrix currentmatrix 8 1 roll
+ dup 0 get 1 index 1 get translate
+ 2 get rotate
+ [ 2 index neg 2 index 0 0
+ 3 index 3 index neg
+ 1 index 10 index mul 0
+ 7 index 7 index ]
+ 4 1 roll pop pop pop
+ dup 3 1 roll
+ gsave lfigpaintpath grestore lfigdopath pop pop
+ setmatrix
+} def
+
+% arrow head styles
+/lfigopen 0.0 def
+/lfighalfopen 0.5 def
+/lfigclosed 1.0 def
+
+% stroke no arrows, forward, back, and both
+/lfignoarrow { pop pop pop pop pop pop pop pop } def
+/lfigforward { 7 -1 roll lfigdoarrow pop } def
+/lfigback { 8 -2 roll pop lfigdoarrow } def
+/lfigboth { 8 -1 roll 7 copy lfigdoarrow pop 7 -1 roll lfigdoarrow } def
+
+% lfigprevious: return previous point on path
+/lfigprevious
+{ lfigisnumbertype
+ { 2 copy }
+ { lfigisarraytype
+ { 2 index 2 index }
+ { 0 0 }
+ ifelse
+ } ifelse
+} def
+
+% label a point in 2nd top dictionary: <point> /name lfigpointdef -
+/lfigpointdef
+{
+ % (Entering lfigpointdef) lfigdebugprint
+ [ 4 2 roll transform
+ /itransform cvx ] cvx
+ currentdict end
+ 3 1 roll
+ % currentdict length currentdict maxlength lt
+ % { def }
+ % { exec moveto (too many labels) show stop }
+ % ifelse
+ def
+ begin
+ % (Leaving lfigpointdef) lfigdebugprint
+} def
+
+% promote labels from second top to third top dictionary
+% <string> lfigpromotelabels -
+/lfigpromotelabels
+{
+ % (Entering lfigpromotelabels) lfigdebugprint
+ currentdict end exch currentdict end
+ { exch 20 string cvs 2 index
+ (@) lfigconcat exch lfigconcat cvn exch def
+ } forall pop begin
+ % (Leaving lfigpromotelabels) lfigdebugprint
+} def
+
+% show labels (except CIRCUM): - lfigshowlabels -
+/lfigshowlabels
+{
+ % (Entering lfigshowlabels) lfigdebugprint
+ currentdict end
+ currentdict
+ { 1 index 20 string cvs (CIRCUM) search % if CIRCUM in key
+ { pop pop pop pop pop }
+ { pop cvx exec 2 copy
+ newpath 1.5 pt 0 360 arc
+ 0 setgray fill
+ /Times-Roman findfont 8 pt scalefont setfont
+ moveto 0.2 cm 0.1 cm rmoveto 20 string cvs show
+ }
+ ifelse
+ } forall
+ begin
+ % (Leaving lfigshowlabels) lfigdebugprint
+} def
+
+% fix an angle to 0 <= res < 360: <angle> lfigfixangle <angle>
+/lfigfixangle
+{
+ % (Entering lfigfixangle) lfigdebugprint
+ { dup 0 ge { exit } if
+ 360 add
+ } loop
+ { dup 360 lt { exit } if
+ 360 sub
+ } loop
+ % (Leaving lfigfixangle) lfigdebugprint
+} def
+
+% find point on circumference of box: alpha a b lfigboxcircum x y
+/lfigboxcircum
+{
+ % (Entering lfigboxcircum) lfigdebugprint
+ 4 dict begin
+ /b exch def
+ /a exch def
+ lfigfixangle /alpha exch def
+ 0 0 a b lfigangle /theta exch def
+
+ % if alpha <= theta, return (a, a*tan(alpha))
+ alpha theta le
+ { a a alpha sin mul alpha cos div }
+ {
+ % else if alpha <= 180 - theta, return (b*cot(alpha), b)
+ alpha 180 theta sub le
+ { b alpha cos mul alpha sin div b }
+ {
+ % else if alpha <= 180 + theta, return (-a, -a*tan(alpha))
+ alpha 180 theta add le
+ { a neg a neg alpha sin mul alpha cos div }
+ {
+ % else if alpha <= 360 - theta, return (-b*cot(alpha), -b)
+ alpha 360 theta sub le
+ { b neg alpha cos mul alpha sin div b neg }
+ {
+ % else 360 - theta <= alpha, return (a, a*tan(alpha))
+ a a alpha sin mul alpha cos div
+ } ifelse
+ } ifelse
+ } ifelse
+ } ifelse
+ end
+ % (Leaving lfigboxcircum) lfigdebugprint
+} def
+
+% find quadratic roots (assume a != 0): a b c lfigqroots x1 x2 2
+% or x2 1
+% or 0
+/lfigqroots
+{
+ 4 dict begin
+ /c exch def
+ /b exch def
+ /a exch def
+ /disc b b mul 4 a c mul mul sub def
+ disc 0 lt
+ { 0
+ }
+ { disc 0 eq
+ { b neg 2 a mul div
+ 1
+ }
+ { b neg disc sqrt add 2 a mul div
+ b neg disc sqrt sub 2 a mul div
+ 2
+ }
+ ifelse
+ }
+ ifelse
+ end
+} def
+
+% work our which quadrant: <angle> lfigquadrant <0-3>
+/lfigquadrant
+{ dup 90 lt
+ { pop 0
+ }
+ { dup 180 lt
+ { pop 1
+ }
+ { 270 lt
+ { 2
+ }
+ { 3
+ } ifelse
+ } ifelse
+ } ifelse
+} def
+
+% find curvebox circum, assuming upper right quadrant: alpha a b xmk lfigcb x y
+/lfigcb
+{
+ 6 dict begin
+ /xmk exch def
+ /b exch def
+ /a exch def
+ /alpha exch def
+ /theta1 0 0 a b xmk sub lfigangle def
+ /theta2 0 0 a xmk sub b lfigangle def
+ alpha theta1 le
+ { % if alpha <= theta1, return (a, a*tan(alpha))
+ a a alpha sin mul alpha cos div
+ }
+ { alpha theta2 ge
+ { % else if alpha > theta2, return (b*cot(alpha), b)
+ b alpha cos mul alpha sin div b
+ }
+ {
+ % else, return the intersection of line and circle
+ a xmk sub b xmk sub xmk 0 0 alpha lfigcircleintersect
+ dup 0 eq
+ { % should never happen, just return any reasonable point
+ pop
+ a b 0.5 lfigpmul
+ }
+ { 1 eq
+ { % should never happen, just return the point on top of stack
+ }
+ { % the usual case, two points on stack, return the larger
+ lfigpmax
+ } ifelse
+ } ifelse
+ } ifelse
+ } ifelse
+ end
+} def
+
+% find point on circumference of curvebox: alpha a b xmk lfigcurveboxcircum x y
+/lfigcurveboxcircum
+{
+ % (Entering lfigcurveboxcircum) lfigdebugprint
+ 5 dict begin
+ /xmk exch def
+ /b exch def
+ /a exch def
+ lfigfixangle /alpha exch def
+
+ % work out which quadrant we are in, and reflect accordingly
+ /quad alpha lfigquadrant def
+ quad 0 eq
+ { alpha a b xmk lfigcb
+ }
+ { quad 1 eq
+ { 180 alpha sub a b xmk lfigcb exch neg exch
+ }
+ { quad 2 eq
+ { alpha 180 sub a b xmk lfigcb neg exch neg exch
+ }
+ { 360 alpha sub a b xmk lfigcb neg
+ } ifelse
+ } ifelse
+ } ifelse
+ end
+ % (Leaving lfigcurveboxcircum) lfigdebugprint
+} def
+
+% find point on circumference of diamond: alpha a b lfigdiamondcircum x y
+/lfigdiamondcircum
+{
+ % (Entering lfigdiamondcircum) lfigdebugprint
+ 4 dict begin
+ /b exch def
+ /a exch def
+ lfigfixangle /alpha exch def
+ b alpha cos abs mul a alpha sin abs mul add /denom exch def
+ a b mul alpha cos mul denom div
+ a b mul alpha sin mul denom div
+ end
+ % (Leaving lfigdiamondcircum) lfigdebugprint
+} def
+
+% find point on circumference of ellipse: alpha a b lfigellipsecircum x y
+/lfigellipsecircum
+{
+ % (Entering lfigellipsecircum) lfigdebugprint
+ 4 dict begin
+ /b exch def
+ /a exch def
+ lfigfixangle /alpha exch def
+ b alpha cos mul dup mul a alpha sin mul dup mul add sqrt /denom exch def
+ a b mul alpha cos mul denom div
+ a b mul alpha sin mul denom div
+ end
+ % (Leaving lfigellipsecircum) lfigdebugprint
+} def
+
+% find point of intersection of two lines each defined by two points
+% x1 y1 x2 y2 x3 y3 x4 y4 lfiglineintersect x y
+/lfiglineintersect
+{
+ % (Entering lfiglineintersect) lfigdebugprint
+ 13 dict begin
+ /y4 exch def
+ /x4 exch def
+ /y3 exch def
+ /x3 exch def
+ /y2 exch def
+ /x2 exch def
+ /y1 exch def
+ /x1 exch def
+ x2 x1 sub /x21 exch def
+ x4 x3 sub /x43 exch def
+ y2 y1 sub /y21 exch def
+ y4 y3 sub /y43 exch def
+ y21 x43 mul y43 x21 mul sub /det exch def
+
+ % calculate x
+ y21 x43 mul x1 mul
+ y43 x21 mul x3 mul sub
+ y3 y1 sub x21 mul x43 mul add
+ det div
+
+ % calculate y
+ x21 y43 mul y1 mul
+ x43 y21 mul y3 mul sub
+ x3 x1 sub y21 mul y43 mul add
+ det neg div
+
+ end
+ % (Leaving lfiglineintersect) lfigdebugprint
+} def
+
+% find point on circumference of polygon
+% alpha radius num theta lfigpolycircum x y
+/lfigpolycircum
+{
+ % (Entering lfigpolycircum) lfigdebugprint
+ 13 dict begin
+ /theta exch def
+ /num exch def
+ /radius exch def
+ /alpha exch def
+
+ % calculate delta, the angle from theta to alpha
+ alpha theta sub lfigfixangle
+
+ % calculate the angle which is the multiple of 360/num closest to delta
+ 360 num div div truncate 360 num div mul theta add /anglea exch def
+
+ % calculate the next multiple of 360/num after anglea
+ anglea 360 num div add /angleb exch def
+
+ % intersect the line through these two points with the alpha line
+ anglea cos anglea sin angleb cos angleb sin
+ 0 0 alpha cos 2 mul alpha sin 2 mul
+ lfiglineintersect radius lfigpmul
+
+ end
+ % (Leaving lfigpolycircum) lfigdebugprint
+} def
+
+% find point of intersection of a point and a circle
+% x0 y0 r x1 y1 theta lfigcircleintersect xa ya xb yb 2
+% or xb yb 1
+% or 0
+/lfigcircleintersect
+{
+ % (Entering lfigcircleintersect) lfigdebugprint
+ 15 dict begin
+ /theta exch def
+ /y1 exch def
+ /x1 exch def
+ /r exch def
+ /y0 exch def
+ /x0 exch def
+
+ % if sin(theta) = 0 then line is horizontal and y must be y1
+ theta sin abs 0.00001 lt
+ {
+ /a 1 def
+ /b -2 x0 mul def
+ /c x0 dup mul y1 y0 sub dup mul add r dup mul sub def
+ a b c lfigqroots dup
+ 0 eq
+ { pop
+ 0
+ }
+ { 1 eq
+ { y1 1
+ }
+ { y1 exch y1 2
+ } ifelse
+ } ifelse
+ }
+ {
+ /ct theta cos theta sin div def
+ /a ct ct mul 1 add def
+ /b ct x1 x0 sub mul y1 add y0 sub 2 mul def
+ /c x1 x0 sub dup mul y1 y0 sub dup mul add r dup mul sub def
+ a b c lfigqroots dup
+ 0 eq
+ { pop
+ 0
+ }
+ { 1 eq
+ { y1 add /yb exch def
+ yb y1 sub ct mul x1 add /xb exch def
+ xb yb 1
+ }
+ { y1 add /ya exch def
+ ya y1 sub ct mul x1 add /xa exch def
+ y1 add /yb exch def
+ yb y1 sub ct mul x1 add /xb exch def
+ xa ya xb yb 2
+ } ifelse
+ } ifelse
+ } ifelse
+ end
+ % (Leaving lfigcircleintersect) lfigdebugprint
+} def
+
+% add CIRCUM operator with this body: <array> lfigcircumdef -
+/lfigcircumdef
+{ % (Entering lfigcircumdef) lfigdebugprint
+ /CIRCUM exch cvx
+ currentdict end
+ 3 1 roll
+ % currentdict length currentdict maxlength lt
+ % { def }
+ % { exec moveto (too many labels) show stop }
+ % ifelse
+ def
+ begin
+ % (Leaving lfigcircumdef) lfigdebugprint
+} def
+
+end
+%%EndResource
+
+%%BeginResource: procset LoutGraphPrependGraphic
+% @PrependGraphic file /export/home/6monthspace/jeff/lout.lib/include/graphf.lpg
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+% %
+% PostScript @SysPrependGraphic file for @Graph (Version 1.0) %
+% %
+% Version 1.0 by Jeffrey H. Kingston, December 1993. %
+% %
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+errordict begin
+ /handleerror
+ {
+ { /Times-Roman findfont 8 pt scalefont setfont
+ 0 setgray 4 pt 4 pt moveto
+ $error /errorname get
+ dup lgraphdict exch known
+ { lgraphdict exch get }
+ { 30 string cvs } ifelse
+ show
+ ( Command: ) show
+ $error /command get 30 string cvs show
+ } stopped {} if
+ showpage stop
+ } def
+end
+
+/lgraphdict 200 dict def
+lgraphdict begin
+
+% error messages
+/dictfull (dictfull error) def
+/dictstackoverflow (dictstackoverflow error) def
+/execstackoverflow (execstackoverflow error: expression too complex?) def
+/limitcheck (limitcheck error: graph too complex or too large?) def
+/syntaxerror (syntaxerror error: syntax error in text of graph?) def
+/typecheck (typecheck error: syntax error in text of graph?) def
+/undefined (undefined error: unknown or misspelt symbol?) def
+/rangecheck (rangecheck error: undefined expression (e.g. divide by zero)?) def
+/VMError (VMError error: run out of memory?) def
+
+% random number between x and y inclusive: x y dorand num
+/dorand { 1 index sub 1 add rand exch mod add } def
+
+% log to given base: base num dolog num
+/dolog { ln exch ln div } def
+
+% maximum of two numbers: <num> <num> max <num>
+/max { 2 copy gt { pop } { exch pop } ifelse } def
+
+% add two points: <point> <point> padd <point>
+/padd { exch 3 1 roll add 3 1 roll add exch } def
+
+% subtract first point from second: <point> <point> psub <point>
+/psub { 3 2 roll sub 3 1 roll exch sub exch } def
+
+% distance between two points: <point> <point> distance <length>
+/distance { psub dup mul exch dup mul add sqrt } def
+
+% point at angle and distance: <point> <length> <angle> atangle <point>
+/atangle { 2 copy cos mul 3 1 roll sin mul padd } def
+
+% angle from one point to another: <point> <point> angle <angle>
+/angle { psub 2 copy 0 eq exch 0 eq and {pop} {exch atan} ifelse } def
+
+
+% set up for line
+% - linesetup <length> <dashlength>
+/linesetup
+{ newpath
+ xcurr ycurr trpoint xprev yprev trpoint
+ 4 copy moveto lineto distance dashlength
+} def
+
+% set up for icon-avoiding line
+% - ilinesetup <length> <dashlength>
+/ilinesetup
+{ newpath
+ xprev yprev trpoint xcurr ycurr trpoint 4 copy
+ 4 copy angle symbolsize 1.5 mul exch 4 2 roll pop pop atangle
+ 6 2 roll 4 2 roll
+ 4 copy angle symbolsize 1.5 mul exch 4 2 roll pop pop atangle
+ 4 copy moveto lineto distance dashlength
+} def
+
+
+% stroke a solid line: <length> <dashlength> solid -
+/solid
+{ pop pop [] 0 setdash linewidth setlinewidth stroke
+} def
+
+% stroke a dashed line: <length> <dashlength> dashed -
+/dashed
+{ 2 copy 2 mul le 1 index 0 le or
+ { exch pop 1 pt max [ exch dup ] 0 setdash }
+ { dup [ exch 4 2 roll 2 copy div
+ 1 sub 2 div ceiling dup 4 1 roll
+ 1 add mul sub exch div ] 0 setdash
+ } ifelse linewidth setlinewidth stroke
+} def
+
+% stroke a cdashed line: <length> <dashlength> cdashed -
+/cdashed
+{ 2 copy le 1 index 0 le or
+ { exch pop 1 pt max [ exch dup ] dup 0 get 2 div setdash }
+ { dup [ 4 2 roll exch 2 copy exch div
+ 2 div ceiling div 1 index sub
+ ] exch 2 div setdash
+ } ifelse linewidth setlinewidth stroke
+} def
+
+% stroke a dotted line: <length> <dashlength> dotted -
+/dotted
+{ 2 copy le 1 index 0 le or
+ { exch pop 1 pt max [ exch 0 exch ] 0 setdash }
+ { 1 index exch div ceiling div 0.99999 mul
+ [ 0 3 2 roll ] 0 setdash
+ } ifelse gsave 1 setlinecap linewidth setlinewidth stroke grestore newpath
+} def
+
+% stroke a noline line: <length> <dashlength> noline -
+/noline
+{ pop pop
+} def
+
+% stroke a y histogram: - yhisto -
+/yhisto
+{ xprev yleft trpoint yextra sub moveto
+ xprev yprev trpoint lineto
+ xcurr yprev trpoint lineto
+ xcurr yleft trpoint yextra sub lineto
+ linewidth setlinewidth stroke
+} def
+
+% stroke an x histogram: - xhisto -
+/xhisto
+{ xleft yprev trpoint exch xextra sub exch moveto
+ xcurr yprev trpoint lineto
+ xcurr ycurr trpoint lineto
+ xleft ycurr trpoint exch xextra sub exch lineto
+ linewidth setlinewidth stroke
+} def
+
+% stroke a surface y histogram: - surfaceyhisto -
+/surfaceyhisto
+{ firstpair
+ { xprev yleft trpoint yextra sub moveto
+ xprev yprev trpoint lineto
+ }
+ { xprev yprev trpoint moveto
+ } ifelse
+ xcurr yprev trpoint lineto
+ lastpair
+ { xcurr yleft trpoint yextra sub lineto
+ }
+ { xcurr ycurr trpoint lineto
+ } ifelse
+ linewidth setlinewidth stroke
+} def
+
+% stroke a surface x histogram: - surfacexhisto -
+/surfacexhisto
+{ firstpair
+ { xleft yprev trpoint exch xextra sub exch moveto
+ }
+ { xprev yprev trpoint moveto
+ } ifelse
+ xcurr yprev trpoint lineto
+ xcurr ycurr trpoint lineto
+ lastpair
+ { xleft ycurr trpoint exch xextra sub exch lineto
+ } if
+ linewidth setlinewidth stroke
+} def
+
+% stroke a filled y histogram: - filledyhisto -
+/filledyhisto
+{
+ linewidth setlinewidth
+ xprev yleft trpoint exch currentlinewidth 2 div add exch yextra sub moveto
+ xprev yprev trpoint exch currentlinewidth 2 div add exch lineto
+ xcurr yprev trpoint exch currentlinewidth 2 div sub exch lineto
+ xcurr yleft trpoint exch currentlinewidth 2 div sub exch yextra sub lineto
+ closepath fill
+} def
+
+% stroke a filled x histogram: - filledxhisto -
+/filledxhisto
+{
+ linewidth setlinewidth
+ xleft yprev trpoint currentlinewidth 2 div add exch xextra sub exch moveto
+ xcurr yprev trpoint currentlinewidth 2 div add lineto
+ xcurr ycurr trpoint currentlinewidth 2 div sub lineto
+ xleft ycurr trpoint currentlinewidth 2 div sub exch xextra sub exch lineto
+ closepath fill
+} def
+
+
+% cross: show a small cross
+/cross
+{ newpath
+ xcurr ycurr trpoint moveto
+ symbolsize neg symbolsize neg rmoveto
+ symbolsize 2 mul symbolsize 2 mul rlineto
+ 0 symbolsize -2 mul rmoveto
+ symbolsize -2 mul symbolsize 2 mul rlineto
+ [] 0 setdash stroke
+} def
+
+% plus: show a small plus
+/plus
+{ newpath
+ xcurr ycurr trpoint moveto
+ symbolsize neg 0 rmoveto
+ symbolsize 2 mul 0 rlineto
+ symbolsize neg symbolsize neg rmoveto
+ 0 symbolsize 2 mul rlineto
+ [] 0 setdash stroke
+} def
+
+% square: show a small square
+/square
+{ newpath
+ xcurr ycurr trpoint moveto
+ symbolsize neg symbolsize neg rmoveto
+ symbolsize 2 mul 0 rlineto
+ 0 symbolsize 2 mul rlineto
+ symbolsize -2 mul 0 rlineto
+ closepath [] 0 setdash stroke
+} def
+
+% filledsquare: show a small filled square
+/filledsquare
+{ newpath
+ xcurr ycurr trpoint moveto
+ symbolsize neg symbolsize neg rmoveto
+ symbolsize 2 mul 0 rlineto
+ 0 symbolsize 2 mul rlineto
+ symbolsize -2 mul 0 rlineto
+ closepath gsave [] 0 setdash stroke grestore fill
+} def
+
+% diamond: show a small diamond
+/diamond
+{ newpath
+ xcurr ycurr trpoint moveto
+ symbolsize neg 0 rmoveto
+ symbolsize symbolsize neg rlineto
+ symbolsize symbolsize rlineto
+ symbolsize neg symbolsize rlineto
+ closepath [] 0 setdash stroke
+} def
+
+% filleddiamond: show a small filled diamond
+/filleddiamond
+{ newpath
+ xcurr ycurr trpoint moveto
+ symbolsize neg 0 rmoveto
+ symbolsize symbolsize neg rlineto
+ symbolsize symbolsize rlineto
+ symbolsize neg symbolsize rlineto
+ closepath gsave [] 0 setdash stroke grestore fill
+} def
+
+% circle: show a small circle
+/circle
+{ newpath
+ xcurr ycurr trpoint symbolsize 0 360 arc [] 0 setdash stroke
+} def
+
+% filledcircle: show a small filled circle
+/filledcircle
+{ newpath
+ xcurr ycurr trpoint symbolsize 0 360 arc gsave [] 0 setdash stroke grestore fill
+} def
+
+% triangle: show a small triangle
+/triangle
+{ newpath
+ xcurr ycurr trpoint moveto
+ 0 symbolsize 1.5 mul rmoveto
+ symbolsize neg symbolsize -2.5 mul rlineto
+ symbolsize 2 mul 0 rlineto
+ closepath [] 0 setdash stroke
+} def
+
+% filledtriangle: show a small filled triangle
+/filledtriangle
+{ newpath
+ xcurr ycurr trpoint moveto
+ 0 symbolsize 1.5 mul rmoveto
+ symbolsize neg symbolsize -2.5 mul rlineto
+ symbolsize 2 mul 0 rlineto
+ closepath gsave [] 0 setdash stroke grestore fill
+} def
+
+
+%plog: like log only with a base, and protected from failing if <= 0
+% base x plog res
+/plog { dup 0 le { pop pop 0 } { ln exch ln div } ifelse } def
+
+% xtr: transform one x value logarithmically if xlog > 1
+% <num> xtr <num>
+/xtr
+{ xlog 1 gt
+ { xlog exch plog
+ } if
+} def
+
+% ytr: transform one y value logarithmically if ylog > 1
+% <num> ytr <num>
+/ytr
+{ ylog 1 gt
+ { ylog exch plog
+ } if
+} def
+
+% % trpoint: transform (x, y) in graph space into (x', y') in print space
+% % x y trpoint x' y'
+% /trpoint
+% { exch xtr trxmin sub trxmax trxmin sub div xwidth mul xextra add
+% exch ytr trymin sub trymax trymin sub div ywidth mul yextra add
+% } def
+
+
+% trpoint: transform (x, y) in graph space into (x', y') in print space
+% x y trpoint x' y'
+/trpoint
+{ exch xtr xdecr { trxmax exch sub } { trxmin sub } ifelse
+ trxmax trxmin sub div xwidth mul xextra add
+
+ exch ytr ydecr { trymax exch sub } { trymin sub } ifelse
+ trymax trymin sub div ywidth mul yextra add
+} def
+
+
+% yonly: interpolate x values 1, 2, ... into data
+% [ data ] yonly [ newdata ]
+/yonly
+{ dup /tmp exch def
+ length [ exch 1 exch 1 exch
+ { dup tmp exch 1 sub get
+ } for
+ ]
+} def
+
+% xonly: interpolate y values 1, 2, ... into data
+% [ data ] yonly [ newdata ]
+/xonly
+{ dup /tmp exch def
+ length [ exch 1 exch 1 exch
+ { dup tmp exch 1 sub get exch
+ } for
+ ]
+} def
+
+% xandy: no interpolation of x or y values
+% [ data ] xandy [ data ]
+/xandy {} def
+
+
+% expstringwidth: calculate width of string containing optional exponent
+% <string> expstringwidth <width>
+/expstringwidth
+{ (^) search
+ { exch pop stringwidth pop exch stringwidth pop 0.7 mul add }
+ { stringwidth pop }
+ ifelse
+} def
+
+% expstringshow: show string containing optional exponent
+% <string> expstringshow -
+/expstringshow
+{ (^) search
+ { exch pop show 0 0.5 ft rmoveto
+ gsave currentfont 0.7 scalefont setfont show grestore
+ }
+ { show
+ }
+ ifelse
+} def
+
+% concatenate two strings: <string> <string> strconcat <string>
+/strconcat
+{ 2 copy length exch length add string
+ dup 0 4 index putinterval
+ dup 3 index length 3 index putinterval
+ 3 1 roll pop pop
+} def
+
+% lgen: generate one label automatically
+% num lgen num string
+/lgen { dup 20 string cvs } def
+
+% loglgen: generate one logarithmic label (with exponent)
+% <base> <exponent> loglgen <string>
+/loglgen
+{ 20 string cvs exch 20 string cvs
+ (^) strconcat exch strconcat
+} def
+
+
+% printxtick: print one x tick
+% xpos printxtick -
+/printxtick
+{ newpath
+ yleft trpoint moveto 0 yextra neg rmoveto
+ 0 xticklength neg rlineto [] 0 setdash stroke
+} def
+
+% printxlabel: print one x label
+% (xlabel) xpos printxlabel -
+/printxlabel
+{ yleft trpoint moveto 0 yextra neg rmoveto
+ 0 xticklength neg rmoveto 0 0.9 ft neg rmoveto
+ xlog 1 gt { 0 0.3 ft neg rmoveto } if
+ dup expstringwidth -2 div 0 rmoveto expstringshow
+} def
+
+% printytick: print one y tick
+% ypos printytick -
+/printytick
+{ newpath
+ xleft exch trpoint moveto xextra neg 0 rmoveto
+ yticklength neg 0 rlineto [] 0 setdash stroke
+} def
+
+% printylabel: print one y label
+% (ylabel) ypos printylabel -
+/printylabel
+{ xleft exch trpoint moveto xextra neg 0 rmoveto
+ yticklength neg 0 rmoveto -0.3 ft -0.3 ft rmoveto
+ dup expstringwidth neg 0 rmoveto expstringshow
+} def
+
+% printrtick: print one r tick
+% ypos printrtick -
+/printrtick
+{ newpath
+ xright exch trpoint moveto xextra 0 rmoveto
+ rticklength 0 rlineto [] 0 setdash stroke
+} def
+
+% printrlabel: print one r label
+% (rlabel) ypos printrlabel -
+/printrlabel
+{ xright exch trpoint moveto xextra 0 rmoveto
+ rticklength 0 rmoveto 0.3 ft -0.3 ft rmoveto
+ expstringshow
+} def
+
+% printticks: print ticks and labels
+% /tickproc /labelproc [ tickandlabeldata ] min printticks -
+/printticks
+{ /prev exch def
+ { dup type dup dup /integertype eq exch /realtype eq or
+ { pop dup /prev exch def 2 index cvx exec
+ }
+ { /stringtype eq
+ { prev 2 index cvx exec
+ }
+ { pop
+ } ifelse
+ } ifelse
+ } forall
+ pop pop
+} def
+
+
+% printxaxistick: print one x axis tick
+% xpos printxaxistick -
+/printxaxistick
+{ newpath
+ yaxis trpoint moveto 0 xticklength -2 div rmoveto
+ 0 xticklength rlineto [] 0 setdash stroke
+} def
+
+% printxaxislabel: print one x axis label
+% (xlabel) xpos printxaxislabel -
+/printxaxislabel
+{ yaxis trpoint moveto
+ 0 xticklength -2 div rmoveto 0 0.9 ft neg rmoveto
+ xlog 1 gt { 0 0.3 ft neg rmoveto } if
+ dup expstringwidth -2 div 0 rmoveto expstringshow
+} def
+
+% printyaxistick: print one y axis tick
+% ypos printyaxistick -
+/printyaxistick
+{ newpath
+ xaxis exch trpoint moveto
+ yticklength -2 div 0 rmoveto
+ yticklength 0 rlineto [] 0 setdash stroke
+} def
+
+% printyaxislabel: print one y axis label
+% (ylabel) ypos printyaxislabel -
+/printyaxislabel
+{ xaxis exch trpoint moveto
+ yticklength -2 div 0 rmoveto -0.3 ft -0.3 ft rmoveto
+ dup expstringwidth neg 0 rmoveto expstringshow
+} def
+
+
+% <val> minmax -
+% perform minv := min(minv, val); maxv := max(maxv, val)
+% allowing for the possibility of minv, maxv, val being false (undefined)
+/minmax
+{ dup false eq
+ { pop }
+ { minv false eq
+ { dup /minv exch def /maxv exch def }
+ { dup minv lt
+ { /minv exch def }
+ { dup maxv gt
+ { /maxv exch def }
+ { pop }
+ ifelse
+ } ifelse
+ } ifelse
+ } ifelse
+} def
+
+% <ticks> ticksundef <ticks> <bool>
+% returns true iff the ticks array is undefined (one false entry)
+/ticksundef
+{ dup length 1 eq
+ { dup 0 get false eq
+ }
+ { false }
+ ifelse
+} def
+
+% <number> integral <boolean>
+% true if the number has an integral value
+/integral { dup round eq } def
+
+% ticksep ticks xory alldata minval maxval axis base ticksandlimits ticks min max base
+% ticksandlimits: sort out value of x or y ticks and limits and log base
+/ticksandlimits
+{ /base exch def
+ /minv false def
+ /maxv false def
+
+ % min and max of user-supplied minval, maxval, and axis
+ minmax minmax minmax
+
+ % min and max of data points
+ { 0 get dup dup length 1 sub 3 index exch 2 exch
+ { get minmax dup
+ } for pop pop
+ } forall
+ pop dup
+
+ % min and max of tick values
+ { dup type /stringtype eq
+ { pop } { minmax } ifelse
+ } forall
+
+ % fix minv and maxv if undefined (false) or equal
+ minv false eq
+ { /minv -1 def /maxv 1 def }
+ { minv maxv eq
+ { minv 0 lt
+ { /minv 2 minv mul def /maxv 0 def
+ }
+ { minv 0 eq
+ { /minv -1 def /maxv 1 def
+ }
+ { /minv 0 def /maxv 2 maxv mul def
+ } ifelse
+ } ifelse
+ } if
+ } ifelse
+
+ % invent ticks if undefined
+ ticksundef
+ { pop /ticksep exch def
+
+ % if base is reasonable and minv is positive, logarithmic ticks
+ base 1 gt minv 0 gt and
+ {
+ % get integral log of minv and maxv
+ /logminv base minv plog floor cvi def
+ /logmaxv base maxv plog ceiling cvi def
+
+ % if minv close to base, make it 1; reset minv and maxv
+ logminv 1 eq logmaxv 4 ge and { /logminv 0 def } if
+ /minv base logminv exp def
+ /maxv base logmaxv exp def
+
+ % ticks := [ base**logminv, ... , base**logmaxv ]
+ [ logminv 1 logmaxv
+ { dup base exch exp
+ exch base exch loglgen
+ } for
+ ]
+ }
+ { % non-logarithmic ticks
+ {
+ % fix tick separation if undefined (0) or too small
+ /base 0 def
+ /delta maxv minv sub def
+ ticksep delta 30 div le
+ { /ticksep 10 delta log 1 sub ceiling exp def
+ ticksep delta 2 div ge
+ { /ticksep ticksep 2 div def }
+ { ticksep delta 5 div lt
+ { /ticksep 2 ticksep mul def
+ } if
+ } ifelse
+ } if
+
+ % adjust minv and maxv to be multiples of ticksep
+ /minv minv ticksep div floor ticksep mul def
+ /maxv maxv ticksep div ceiling ticksep mul def
+ /delta maxv minv sub def
+
+ % if minv or maxv near zero, move to zero and redo
+ minv ticksep eq
+ { /minv 0 def }
+ { maxv ticksep neg eq { /maxv 0 def } { exit } ifelse
+ } ifelse
+ } loop
+
+ % if minv, maxv, and ticksep are all integral, set "makeint" to true
+ /makeint minv integral maxv integral ticksep integral and and def
+
+ % ticks := [ minv, minv+ticksep, ... , maxv ]
+ [ 0 1 delta ticksep div round
+ { ticksep mul minv add makeint { cvi } if lgen }
+ for
+ ]
+ } ifelse
+ }
+ { exch pop
+ } ifelse
+ minv maxv base
+} def
+
+% xset: set up all data for x axis, including limits and ticks
+% xticksep xticks 0 alldata xmin xmax xlog xextra xdecr xaxis xticklength xset -
+/xset
+{ /xticklength exch def
+ /xaxis exch def
+ /xdecr exch def
+ /xextra exch def
+ xaxis exch ticksandlimits
+ /xlog exch def /xmax exch def /xmin exch def /xticks exch def
+ /xleft xdecr { xmax } { xmin } ifelse def
+ /xright xdecr { xmin } { xmax } ifelse def
+ /xwidth xsize xextra 2 mul sub def
+ /trxmin xmin xtr def /trxmax xmax xtr def
+} def
+
+% yset: set up all data for y axis, including limits and yticks
+% yticksep yticks 0 alldata ymin ymax ylog yextra ydecr yaxis yticklength yset -
+/yset
+{ /yticklength exch def
+ /yaxis exch def
+ /ydecr exch def
+ /yextra exch def
+ yaxis exch ticksandlimits
+ /ylog exch def /ymax exch def /ymin exch def /yticks exch def
+ /yleft ydecr { ymax } { ymin } ifelse def
+ /yright ydecr { ymin } { ymax } ifelse def
+ /ywidth ysize yextra 2 mul sub def
+ /trymin ymin ytr def /trymax ymax ytr def
+} def
+
+% rset: set up all data for y axis (again), but including limits and rticks
+% rticksep rticks 0 alldata ymin ymax ylog yextra ydecr yaxis rticklength rset -
+/rset
+{ /rticklength exch def
+ /yaxis exch def
+ /ydecr exch def
+ /yextra exch def
+ yaxis exch ticksandlimits
+ /ylog exch def /ymax exch def /ymin exch def /rticks exch def
+ /yleft ydecr { ymax } { ymin } ifelse def
+ /yright ydecr { ymin } { ymax } ifelse def
+ /ywidth ysize yextra 2 mul sub def
+ /trymin ymin ytr def /trymax ymax ytr def
+} def
+
+% norset: set up data for no rticks
+% - norset -
+/norset
+{ /rticklength 0 def
+ /rticks [] def
+} def
+
+% framestyle: print a frame around the graph
+/framestyle
+{ 0 0 moveto xsize 0 lineto xsize ysize lineto
+ 0 ysize lineto closepath stroke
+ /printxtick /printxlabel xticks xleft printticks
+ /printytick /printylabel yticks ymin printticks
+ /printrtick /printrlabel rticks ymin printticks
+} def
+
+% nonestyle: print nothing around the graph
+/nonestyle
+{
+} def
+
+% axesstyle: print axes for the graph (unless axis values missing)
+/axesstyle
+{
+ xaxis false eq yaxis false eq or
+ { framestyle }
+ { xaxis yaxis trpoint dup 0 exch moveto xsize exch lineto
+ dup 0 moveto ysize lineto stroke
+ /printxaxistick /printxaxislabel xticks xleft printticks
+ /printyaxistick /printyaxislabel yticks ymin printticks
+ } ifelse
+} def
+
+% rundata: run all data sets
+/rundata
+{ alldata
+ { gsave
+ dup dup dup dup
+ 4 get /dopaint exch def
+ 3 get /initrun exch def
+ 2 get /pairs exch def
+ 1 get /points exch def
+ 0 get /data exch def
+ dopaint
+ { data length 4 ge
+ { initrun
+ newpath
+ data 0 get ymin trpoint yextra sub moveto
+ 0 2 data length 2 sub
+ { dup 1 add
+ data exch get /ycurr exch def
+ data exch get /xcurr exch def
+ xcurr ycurr trpoint lineto
+ } for
+ data dup length 2 sub get ymin trpoint yextra sub lineto
+ closepath fill
+ } if
+ } if
+ initrun
+ data length 2 ge
+ {
+ /xcurr data 0 get def
+ /ycurr data 1 get def
+ points
+ data length 4 ge
+ { 2 2 data length 2 sub
+ { /xprev xcurr def
+ /yprev ycurr def
+ dup dup 2 eq /firstpair exch def
+ data length 2 sub eq /lastpair exch def
+ dup 1 add
+ data exch get /ycurr exch def
+ data exch get /xcurr exch def
+ pairs
+ points
+ } for
+ } if
+ } if
+ grestore
+ } forall
+} def
+
+end
+%%EndResource
+
+%%BeginResource: procset LoutFigPrependGraphic
+% @PrependGraphic file /export/home/6monthspace/jeff/lout.lib/include/diagf.lpg
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+% %
+% PostScript @SysPrependGraphic file for @Diag Jeffrey H. Kingston %
+% Version 2.0 (includes CIRCUM label) September 1996 %
+% %
+% To assist in avoiding name clashes, the names of all symbols %
+% defined here begin with "ldiag". However, this is not feasible %
+% with user-defined labels and some labels used by users. %
+% %
+% <point> is two numbers, a point. %
+% <length> is one number, a length %
+% <angle> is one number, an angle in degrees %
+% <dashlength> is one number, the preferred length of a dash %
+% %
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+errordict begin
+ /handleerror
+ {
+ { /Times-Roman findfont 8 pt scalefont setfont
+ 0 setgray 4 pt 4 pt moveto
+ $error /errorname get
+ dup ldiagdict exch known
+ { ldiagdict exch get }
+ { 50 string cvs } ifelse
+ show
+ ( Command: ) show
+ $error /command get 50 string cvs show
+ } stopped {} if
+ showpage stop
+ } def
+end
+
+% begin diagram: <maxlabels> ldiagbegin -
+% must be defined outside ldiagdict since it loads it
+/ldiagbegin
+{ xsize 0 0 ysize ldiagdict begin
+ 5 -1 roll /ldiagmaxlabels exch def
+ (@Diag) ldiagpushtagdict
+ /OOY ldiagpointdef /OOX ldiagpointdef 0 0 /OOO ldiagpointdef
+} def
+
+% end diagram: - ldiagend -
+/ldiagend
+{ ldiagpoptagdict end
+} def
+
+% concat strings: <string> <string> ldiagconcat <string>
+% must be defined outside ldiagdict since used in ldiagpromotelabels
+/ldiagconcat
+{ 2 copy length exch length add string
+ dup 0 4 index putinterval
+ dup 3 index length 3 index putinterval
+ 3 1 roll pop pop
+} def
+
+/ldiagdebugposy 432 def
+/ldiagdebugposx 72 def
+
+% <string> <int> ldiagdebugprint -
+% must be defined outside ldiagdict since used in arbitrary places
+% print count or <int> stack entries, which ever is the smaller
+/ldiagdebugprint
+{
+ exch
+ gsave
+ initgraphics
+ ldiagdebugposy 72 lt
+ { /ldiagdebugposx ldiagdebugposx 144 add store
+ /ldiagdebugposy 432 store
+ }
+ {
+ /ldiagdebugposy ldiagdebugposy 12 sub store
+ } ifelse
+ ldiagdebugposx ldiagdebugposy moveto
+ /Times-Roman findfont 10 scalefont setfont
+ 0 setgray show
+ count 1 sub 2 copy lt { pop } { exch pop } ifelse 1 sub
+ 0 exch 1 exch
+ {
+ /ldiagdebugposy ldiagdebugposy 12 sub store
+ ldiagdebugposx 12 add ldiagdebugposy moveto
+ index 50 string cvs show
+ } for
+ grestore
+} def
+
+/ldiagdict 200 dict def
+ldiagdict begin
+
+% error messages
+/dictfull (dictfull error: too many labels?) def
+/dictstackoverflow (dictstackoverflow error: labels nested too deeply?) def
+/execstackoverflow (execstackoverflow error: figure nested too deeply?) def
+/limitcheck (limitcheck error: figure nested too deeply or too large?) def
+/syntaxerror (syntaxerror error: syntax error in text of figure?) def
+/typecheck (typecheck error: syntax error in text of figure?) def
+/undefined (undefined error: unknown or misspelt label?) def
+/VMError (VMError error: run out of memory?) def
+
+% push pi onto stack: - ldiagpi <num>
+/ldiagpi 3.14159 def
+
+% push e onto stack: - ldiage <num>
+/ldiage 2.71828 def
+
+% arc directions
+/clockwise false def
+/anticlockwise true def
+
+% test equality between two angles: <angle> <angle> ldiagangleeq <bool>
+/ldiagangleeq { ldiagfixangle exch ldiagfixangle eq } def
+
+% test inequality between two angles: <angle> <angle> ldiaganglene <bool>
+/ldiaganglene { ldiagangleeq not } def
+
+% maximum of two numbers: <num> <num> ldiagmax <num>
+/ldiagmax { 2 copy gt { pop } { exch pop } ifelse } def
+
+% minimum of two numbers: <num> <num> ldiagmin <num>
+/ldiagmin { 2 copy lt { pop } { exch pop } ifelse } def
+
+% add two points: <point> <point> ldiagpadd <point>
+/ldiagpadd
+{
+ % (Entering padd) 4 ldiagdebugprint
+ exch 3 1 roll add 3 1 roll add exch
+ % (Leaving padd) 2 ldiagdebugprint
+} def
+
+% subtract first point from second: <point> <point> ldiagpsub <point>
+/ldiagpsub { 3 2 roll sub 3 1 roll exch sub exch } def
+
+% max two points: <point> <point> ldiagpmax <point>
+/ldiagpmax { exch 3 1 roll ldiagmax 3 1 roll ldiagmax exch } def
+
+% min two points: <point> <point> ldiagpmin <point>
+/ldiagpmin { exch 3 1 roll ldiagmin 3 1 roll ldiagmin exch } def
+
+% scalar multiplication: <point> <num> ldiagpmul <point>
+/ldiagpmul { dup 3 1 roll mul 3 1 roll mul exch } def
+
+% point at angle and distance: <point> <length> <angle> ldiagatangle <point>
+/ldiagatangle { 2 copy cos mul 3 1 roll sin mul ldiagpadd } def
+
+% angle from one point to another: <point> <point> ldiagangleto <angle>
+/ldiagangleto { ldiagpsub 2 copy 0 eq exch 0 eq and {pop} {exch atan} ifelse } def
+
+% distance between two points: <point> <point> ldiagdistance <length>
+/ldiagdistance { ldiagpsub dup mul exch dup mul add sqrt } def
+
+% stroke a solid line: <length> <dashlength> ldiagsolid -
+/ldiagsolid
+{ pop pop [] 0 setdash 1 setlinecap stroke
+} def
+
+% stroke a dashed line: <length> <dashlength> ldiagdashed -
+/ldiagdashed
+{ 2 copy div 2 le 1 index 0 le or
+ { exch pop 1 pt ldiagmax [ exch dup ] 0 setdash }
+ { dup [ exch 4 2 roll 2 copy div
+ 1 sub 2 div ceiling dup 4 1 roll
+ 1 add mul sub exch div ] 0 setdash
+ } ifelse 0 setlinecap stroke
+} def
+
+% stroke a cdashed line: <length> <dashlength> ldiagcdashed -
+/ldiagcdashed
+{ % (Entering ldiagcdashed) 2 ldiagdebugprint
+ 2 copy le 1 index 0 le or
+ { exch pop 1 pt ldiagmax [ exch dup ] dup 0 get 2 div setdash }
+ { dup [ 4 2 roll exch 2 copy exch div
+ 2 div ceiling div 1 index sub
+ ] exch 2 div setdash
+ } ifelse 0 setlinecap stroke
+ % (Leaving ldiagcdashed) 0 ldiagdebugprint
+} def
+
+% stroke a dotted line: <length> <dashlength> ldiagdotted -
+/ldiagdotted
+{ 2 copy le 1 index 0 le or
+ { exch pop 1 pt ldiagmax [ exch 0 exch ] 0 setdash }
+ { 1 index exch div ceiling div
+ [ 0 3 2 roll ] 0 setdash
+ } ifelse 1 setlinecap stroke
+} def
+
+% stroke a noline line: <length> <dashlength> ldiagnoline -
+/ldiagnoline
+{ pop pop
+} def
+
+% painting (i.e. filling): - ldiagwhite - (etc.)
+/ldiagnopaint { } def
+/ldiagnochange { fill } def
+/ldiagdarkblue { 0.0 0.0 0.5 setrgbcolor fill } def
+/ldiagblue { 0.0 0.0 1.0 setrgbcolor fill } def
+/ldiaglightblue { 0.5 0.5 1.0 setrgbcolor fill } def
+/ldiagdarkgreen { 0.0 0.5 0.0 setrgbcolor fill } def
+/ldiaggreen { 0.0 1.0 0.0 setrgbcolor fill } def
+/ldiaglightgreen { 0.5 1.0 0.5 setrgbcolor fill } def
+/ldiagdarkred { 0.5 0.0 0.0 setrgbcolor fill } def
+/ldiagred { 1.0 0.0 0.0 setrgbcolor fill } def
+/ldiaglightred { 1.0 0.5 0.5 setrgbcolor fill } def
+/ldiagdarkcyan { 0.0 0.5 0.5 setrgbcolor fill } def
+/ldiagcyan { 0.0 1.0 1.0 setrgbcolor fill } def
+/ldiaglightcyan { 0.5 1.0 1.0 setrgbcolor fill } def
+/ldiagdarkmagenta { 0.5 0.0 0.5 setrgbcolor fill } def
+/ldiagmagenta { 1.0 0.0 1.0 setrgbcolor fill } def
+/ldiaglightmagenta { 1.0 0.5 1.0 setrgbcolor fill } def
+/ldiagdarkyellow { 0.5 0.5 0.0 setrgbcolor fill } def
+/ldiagyellow { 1.0 1.0 0.0 setrgbcolor fill } def
+/ldiaglightyellow { 1.0 1.0 0.5 setrgbcolor fill } def
+/ldiagdarkgray { 0.2 0.2 0.2 setrgbcolor fill } def
+/ldiaggray { 0.5 0.5 0.5 setrgbcolor fill } def
+/ldiaglightgray { 0.8 0.8 0.8 setrgbcolor fill } def
+/ldiagdarkgrey { 0.2 0.2 0.2 setrgbcolor fill } def
+/ldiaggrey { 0.5 0.5 0.5 setrgbcolor fill } def
+/ldiaglightgrey { 0.8 0.8 0.8 setrgbcolor fill } def
+/ldiagblack { 0.0 0.0 0.0 setrgbcolor fill } def
+/ldiagwhite { 1.0 1.0 1.0 setrgbcolor fill } def
+
+% shape and labels of the @Box symbol
+/ldiagbox
+{
+ 0 0 /SW ldiagpointdef
+ xsize 0 /SE ldiagpointdef
+ xsize ysize /NE ldiagpointdef
+ 0 ysize /NW ldiagpointdef
+ SE 0.5 ldiagpmul /S ldiagpointdef
+ NW 0.5 ldiagpmul /W ldiagpointdef
+ W SE ldiagpadd /E ldiagpointdef
+ S NW ldiagpadd /N ldiagpointdef
+ NE 0.5 ldiagpmul /CTR ldiagpointdef
+
+ 0 dg /S@ANGLE ldiagangledef
+ 45 dg /SE@ANGLE ldiagangledef
+ 90 dg /E@ANGLE ldiagangledef
+ 135 dg /NE@ANGLE ldiagangledef
+ 180 dg /N@ANGLE ldiagangledef
+ 225 dg /NW@ANGLE ldiagangledef
+ 270 dg /W@ANGLE ldiagangledef
+ 315 dg /SW@ANGLE ldiagangledef
+
+ [ CTR NE ldiagpsub /ldiagboxcircum cvx ] ldiagcircumdef
+ SW SE NE NW SW
+} def
+
+% shape and labels of the @CurveBox symbol
+% <margin> ldiagcurvebox <shape>
+/ldiagcurvebox
+{
+
+ % (Entering ldiagcurvebox) 1 ldiagdebugprint
+ ldiagdecodelength /cbmgn exch def
+
+ xsize 0.5 mul ysize 0.5 mul /CTR ldiagpointdef
+ xsize 0.5 mul 0 /S ldiagpointdef
+ xsize ysize 0.5 mul /E ldiagpointdef
+ xsize 0.5 mul ysize /N ldiagpointdef
+ 0 ysize 0.5 mul /W ldiagpointdef
+
+ cbmgn 0.293 mul cbmgn 0.293 mul /SW ldiagpointdef
+ xsize cbmgn 0.293 mul sub cbmgn 0.293 mul /SE ldiagpointdef
+ xsize cbmgn 0.293 mul sub ysize cbmgn 0.293 mul sub /NE ldiagpointdef
+ cbmgn 0.293 mul ysize cbmgn 0.293 mul sub /NW ldiagpointdef
+
+ 0 dg /S@ANGLE ldiagangledef
+ 45 dg /SE@ANGLE ldiagangledef
+ 90 dg /E@ANGLE ldiagangledef
+ 135 dg /NE@ANGLE ldiagangledef
+ 180 dg /N@ANGLE ldiagangledef
+ 225 dg /NW@ANGLE ldiagangledef
+ 270 dg /W@ANGLE ldiagangledef
+ 315 dg /SW@ANGLE ldiagangledef
+
+ [ xsize ysize 0.5 ldiagpmul cbmgn /ldiagcurveboxcircum cvx ] ldiagcircumdef
+
+ cbmgn 0
+ xsize cbmgn sub 0
+ [ xsize cbmgn sub cbmgn ]
+ xsize cbmgn
+ xsize ysize cbmgn sub
+ [ xsize cbmgn sub ysize cbmgn sub ]
+ xsize cbmgn sub ysize
+ cbmgn ysize
+ [ cbmgn ysize cbmgn sub ]
+ 0 ysize cbmgn sub
+ 0 cbmgn
+ [ cbmgn cbmgn ]
+ cbmgn 0
+
+ % (Leaving ldiagcurvebox) 0 ldiagdebugprint
+} def
+
+% shadow of the @ShadowBox symbol
+% its shape and labels are done, somewhat inaccurately, with ldiagbox
+% <shadowmargin> ldiagshadow -
+/ldiagshadow
+{
+ /lfshm exch def
+
+ lfshm 0 moveto
+ 0 lfshm neg rlineto
+ xsize 0 rlineto
+ 0 ysize rlineto
+ lfshm neg 0 rlineto
+ xsize 0 lineto
+ closepath fill
+
+} def
+
+% shape and labels of the @Square symbol
+/ldiagsquare
+{
+ xsize ysize 0.5 ldiagpmul /CTR ldiagpointdef
+ CTR xsize xsize ysize ysize ldiagpmax 0.5 ldiagpmul ldiagpadd /NE ldiagpointdef
+ CTR 0 0 CTR NE ldiagdistance 135 ldiagatangle ldiagpadd /NW ldiagpointdef
+ CTR 0 0 CTR NE ldiagdistance 225 ldiagatangle ldiagpadd /SW ldiagpointdef
+ CTR 0 0 CTR NE ldiagdistance 315 ldiagatangle ldiagpadd /SE ldiagpointdef
+ SW 0.5 ldiagpmul SE 0.5 ldiagpmul ldiagpadd /S ldiagpointdef
+ NW 0.5 ldiagpmul NE 0.5 ldiagpmul ldiagpadd /N ldiagpointdef
+ SW 0.5 ldiagpmul NW 0.5 ldiagpmul ldiagpadd /W ldiagpointdef
+ SE 0.5 ldiagpmul NE 0.5 ldiagpmul ldiagpadd /E ldiagpointdef
+
+ 0 dg /S@ANGLE ldiagangledef
+ 45 dg /SE@ANGLE ldiagangledef
+ 90 dg /E@ANGLE ldiagangledef
+ 135 dg /NE@ANGLE ldiagangledef
+ 180 dg /N@ANGLE ldiagangledef
+ 225 dg /NW@ANGLE ldiagangledef
+ 270 dg /W@ANGLE ldiagangledef
+ 315 dg /SW@ANGLE ldiagangledef
+
+ [ CTR NE ldiagpsub /ldiagboxcircum cvx ] ldiagcircumdef
+ SW SE NE NW SW
+} def
+
+% shape and labels of the @Diamond symbol
+/ldiagdiamond
+{
+ xsize 0 0.5 ldiagpmul /S ldiagpointdef
+ 0 ysize 0.5 ldiagpmul /W ldiagpointdef
+ S W ldiagpadd /CTR ldiagpointdef
+ CTR W ldiagpadd /N ldiagpointdef
+ CTR S ldiagpadd /E ldiagpointdef
+ E N ldiagpadd 0.5 ldiagpmul /NE ldiagpointdef
+ N W ldiagpadd 0.5 ldiagpmul /NW ldiagpointdef
+ S W ldiagpadd 0.5 ldiagpmul /SW ldiagpointdef
+ S E ldiagpadd 0.5 ldiagpmul /SE ldiagpointdef
+
+ 0 dg /S@ANGLE ldiagangledef
+ 90 dg /E@ANGLE ldiagangledef
+ 180 dg /N@ANGLE ldiagangledef
+ 270 dg /W@ANGLE ldiagangledef
+ S E ldiagangleto /SE@ANGLE ldiagangledef
+ E N ldiagangleto /NE@ANGLE ldiagangledef
+ N W ldiagangleto /NW@ANGLE ldiagangledef
+ W S ldiagangleto /SW@ANGLE ldiagangledef
+
+ [ xsize ysize 0.5 ldiagpmul /ldiagdiamondcircum cvx ] ldiagcircumdef
+ S E N W S
+} def
+
+% shape and labels of the @Ellipse symbol
+/ldiagellipse
+{
+ xsize 0 0.5 ldiagpmul /S ldiagpointdef
+ 0 ysize 0.5 ldiagpmul /W ldiagpointdef
+ S W ldiagpadd /CTR ldiagpointdef
+ CTR W ldiagpadd /N ldiagpointdef
+ CTR S ldiagpadd /E ldiagpointdef
+ CTR xsize 0 0.3536 ldiagpmul ldiagpadd 0 ysize 0.3536 ldiagpmul ldiagpadd /NE ldiagpointdef
+ 0 ysize 0.3536 ldiagpmul CTR xsize 0 0.3536 ldiagpmul ldiagpadd ldiagpsub /SE ldiagpointdef
+ xsize 0 0.3536 ldiagpmul CTR ldiagpsub 0 ysize 0.3536 ldiagpmul ldiagpadd /NW ldiagpointdef
+ 0 ysize 0.3536 ldiagpmul xsize 0 0.3536 ldiagpmul CTR ldiagpsub ldiagpsub /SW ldiagpointdef
+ [ xsize ysize 0.5 ldiagpmul /ldiagellipsecircum cvx ] ldiagcircumdef
+
+ 0 dg /S@ANGLE ldiagangledef
+ 90 dg /E@ANGLE ldiagangledef
+ 180 dg /N@ANGLE ldiagangledef
+ 270 dg /W@ANGLE ldiagangledef
+
+ S E ldiagangleto /SE@ANGLE ldiagangledef
+ E N ldiagangleto /NE@ANGLE ldiagangledef
+ N W ldiagangleto /NW@ANGLE ldiagangledef
+ W S ldiagangleto /SW@ANGLE ldiagangledef
+
+ S [ CTR ] E [ CTR ] N [ CTR ] W [ CTR ] S
+} def
+
+% shape and labels of the @Circle symbol
+/ldiagcircle
+{
+ xsize ysize 0.5 ldiagpmul /CTR ldiagpointdef
+ CTR xsize 0 ysize 0 ldiagpmax 0.5 ldiagpmul ldiagpadd /E ldiagpointdef
+ CTR 0 0 CTR E ldiagdistance 45 ldiagatangle ldiagpadd /NE ldiagpointdef
+ CTR 0 0 CTR E ldiagdistance 90 ldiagatangle ldiagpadd /N ldiagpointdef
+ CTR 0 0 CTR E ldiagdistance 135 ldiagatangle ldiagpadd /NW ldiagpointdef
+ CTR 0 0 CTR E ldiagdistance 180 ldiagatangle ldiagpadd /W ldiagpointdef
+ CTR 0 0 CTR E ldiagdistance 225 ldiagatangle ldiagpadd /SW ldiagpointdef
+ CTR 0 0 CTR E ldiagdistance 270 ldiagatangle ldiagpadd /S ldiagpointdef
+ CTR 0 0 CTR E ldiagdistance 315 ldiagatangle ldiagpadd /SE ldiagpointdef
+ [ S E ldiagpsub /ldiagellipsecircum cvx ] ldiagcircumdef
+
+ 0 dg /S@ANGLE ldiagangledef
+ 45 dg /SE@ANGLE ldiagangledef
+ 90 dg /E@ANGLE ldiagangledef
+ 135 dg /NE@ANGLE ldiagangledef
+ 180 dg /N@ANGLE ldiagangledef
+ 225 dg /NW@ANGLE ldiagangledef
+ 270 dg /W@ANGLE ldiagangledef
+ 315 dg /SW@ANGLE ldiagangledef
+
+ S [ CTR ] E [ CTR ] N [ CTR ] W [ CTR ] S
+} def
+
+% shape and labels of the @VLine and @VArrow symbols
+/ldiagvline
+{
+ xmark ysize ldiagprevious /FROM ldiagpointdef
+ xmark 0 ldiagprevious /TO ldiagpointdef
+} def
+
+% points of a polygon around base with given no of sides, vert init angle:
+% <sides> <angle> ldiagpolygon <point> ... <point>
+/ldiagpolygon
+{ exch round cvi exch
+ xsize ysize 0.5 ldiagpmul /CTR ldiagpointdef
+ 90 sub CTR 2 copy ldiagmax 5 3 roll
+ [ 4 copy pop /ldiagpolycircum cvx ] ldiagcircumdef
+ exch dup 360 exch div exch
+ 1 1 3 2 roll
+ { 4 string cvs (P) exch ldiagconcat
+ 3 copy exch pop (@ANGLE) ldiagconcat cvn exch 90 add exch ldiagangledef
+ cvn 6 copy pop pop ldiagatangle 2 copy 10 2 roll
+ 3 2 roll ldiagpointdef
+ dup 3 1 roll add exch
+ } for
+ pop ldiagatangle
+} def
+
+% shape and labels of the @Isosceles triangle symbol
+/ldiagisosceles
+{
+ xsize ysize 0.5 ldiagpmul /CTR ldiagpointdef
+ 0 0 /SW ldiagpointdef
+ xsize 0 /SE ldiagpointdef
+ xsize 0.5 mul ysize /N ldiagpointdef
+ xsize 0.5 mul 0 /S ldiagpointdef
+ SE 0.5 ldiagpmul N 0.5 ldiagpmul ldiagpadd /NE ldiagpointdef
+ SW 0.5 ldiagpmul N 0.5 ldiagpmul ldiagpadd /NW ldiagpointdef
+
+ [ xsize ysize /ldiagisoscelescircum cvx ] ldiagcircumdef
+
+ 0 dg /SW@ANGLE ldiagangledef
+ 0 dg /SE@ANGLE ldiagangledef
+ 180 dg /N@ANGLE ldiagangledef
+ 0 dg /S@ANGLE ldiagangledef
+ SE N ldiagangleto /NE@ANGLE ldiagangledef
+ N SW ldiagangleto /NW@ANGLE ldiagangledef
+
+ SW SE N SW
+} def
+
+% next array element: <array> <index> ldiaggetnext <array> <index> <any> true
+% or <array> <index> false
+/ldiaggetnext
+{ 2 copy exch length ge
+ { false }
+ { 2 copy get exch 1 add exch true } ifelse
+} def
+
+% check whether thing is number: <any> ldiagisnumbertype <any> <bool>
+/ldiagisnumbertype
+{ dup type dup
+ /integertype eq exch /realtype eq or
+} def
+
+% check whether thing is an array: <any> ldiagisarraytype <any> <bool>
+/ldiagisarraytype { dup type /arraytype eq } def
+
+% check whether thing is an array: <any> ldiagisnametype <any> <bool>
+/ldiagisnametype { dup type /nametype eq } def
+
+% get next item: <array> <index> ldiaggetnextitem <array> <index> 0
+% or <array> <index> <array> 1
+% or <array> <index> <point> 2
+/ldiaggetnextitem
+{ ldiaggetnext
+ { ldiagisarraytype
+ { 1
+ }
+ { ldiagisnumbertype
+ { 3 1 roll
+ ldiaggetnext
+ { ldiagisnumbertype
+ { 4 3 roll exch 2
+ }
+ { pop 3 2 roll pop 0
+ } ifelse
+ }
+ { 3 2 roll pop 0
+ } ifelse
+ }
+ { pop 0
+ } ifelse
+ } ifelse
+ }
+ { 0
+ } ifelse
+} def
+
+% approximate equality: num1 num2 approxeq <boolean>
+/approxeq
+{ dup 0 eq
+ { pop 0 eq
+ }
+ { dup 3 1 roll sub exch div abs 0.001 lt
+ } ifelse
+} def
+
+% set arc path: bool x1 y1 x2 y2 x0 y0 ldiagsetarc <angle> <angle> <dist>
+% the path goes from x1 y1 to x2 y2 about centre x0 y0,
+% anticlockwise if bool is true else clockwise.
+% The orientations of backwards pointing and forwards pointing
+% arrowheads are returned in the two angles, and
+% the length of the arc is returned in <dist>.
+/ldiagsetarc
+{
+ % (Entering ldiagsetarc) 7 ldiagdebugprint
+ 20 dict begin
+ matrix currentmatrix 8 1 roll
+ 2 copy translate 2 copy 8 2 roll
+ 4 2 roll ldiagpsub 6 2 roll ldiagpsub
+ dup /y1 exch def dup mul /y1s exch def
+ dup /x1 exch def dup mul /x1s exch def
+ dup /y2 exch def dup mul /y2s exch def
+ dup /x2 exch def dup mul /x2s exch def
+ /dist1 0 0 x1 y1 ldiagdistance def
+ /dist2 0 0 x2 y2 ldiagdistance def
+
+ y1s y2s approxeq
+ { -1
+ }
+ { y1s x2s mul y2s x1s mul sub y1s y2s sub div
+ } ifelse
+ /da exch def
+
+ x1s x2s approxeq
+ { -1
+ }
+ { x1s y2s mul x2s y1s mul sub x1s x2s sub div
+ } ifelse
+ /db exch def
+
+ da 0 gt db 0 gt and
+ {
+ % ( case 1, ellipse) 0 ldiagdebugprint
+ /LMax da sqrt db sqrt ldiagmax def
+ /scalex da sqrt LMax div def
+ /scaley db sqrt LMax div def
+ scalex scaley scale
+ 0 0 LMax
+ 0 0 x1 scalex mul y1 scaley mul ldiagangleto
+ 0 0 x2 scalex mul y2 scaley mul ldiagangleto
+ 2 copy eq { 360 add } if
+ 2 copy 8 2 roll
+ 5 index { arc } { arcn } ifelse
+ 2 index 1 index
+ { 90 sub } { 90 add } ifelse
+ dup sin scaley mul exch cos scalex mul atan
+ 2 index 2 index
+ { 90 add } { 90 sub } ifelse
+ dup sin scaley mul exch cos scalex mul atan
+ 5 2 roll % res1 res2 ang1 ang2 anticlockwise
+ { exch sub } { sub } ifelse
+ dup 0 le { 360 add } if ldiagpi mul LMax mul 180 div
+ }
+ {
+ dist1 dist2 approxeq
+ % x1 y1 dist1 ( x1 y1, d) 3 ldiagdebugprint pop pop pop
+ % x2 y2 dist2 ( x2 y2, d) 3 ldiagdebugprint pop pop pop
+ {
+ % ( case 2, circle) 0 ldiagdebugprint
+ 0 0
+ dist1
+ 0 0 x1 y1 ldiagangleto
+ 0 0 x2 y2 ldiagangleto
+ 2 copy eq { 360 add } if
+ 2 copy 8 2 roll
+ 5 index { arc } { arcn } ifelse
+ 2 index 1 index
+ { 90 sub } { 90 add } ifelse
+ 2 index 2 index
+ { 90 add } { 90 sub } ifelse
+ 5 2 roll % res1 res2 ang1 ang2 clockwise
+ { exch sub } { sub } ifelse
+ dup 0 le { 360 add } if
+ ldiagpi mul dist1 mul 180 div
+ }
+ {
+ % ( case 3, line) 0 ldiagdebugprint
+ x2 y2 lineto pop
+ x2 y2 x1 y1 ldiagangleto
+ x1 y1 x2 y2 ldiagangleto
+ x1 y1 x2 y2 ldiagdistance
+ } ifelse
+ } ifelse
+ 4 -1 roll setmatrix
+ end
+ % (Leaving ldiagsetarc) 3 ldiagdebugprint
+} def
+
+% ldiagsetcurve: set up a Bezier curve from x0 y0 to x3 y3
+% and return arrowhead angles and length of curve (actually 0)
+% x0 y0 x1 y1 x2 y2 x3 y3 ldiagsetcurve <angle> <angle> <length>
+/ldiagsetcurve
+{ 8 copy curveto pop pop
+ ldiagangleto
+ 5 1 roll
+ 4 2 roll ldiagangleto
+ exch
+ 0
+} def
+
+% ldiagsetpath: convert a Diag path into a PostScript path
+% [ shape ] ldiagsetpath
+/ldiagsetpath
+{
+ 10 dict begin
+ 0 newpath
+ /prevseen false def
+ /curveseen false def
+ { ldiaggetnextitem
+ dup 0 eq { pop exit }
+ { 1 eq
+ { /curveseen true def
+ /curve exch def
+ curve length 0 eq { /curveseen false def } if
+ }
+ { /ycurr exch def
+ /xcurr exch def
+ prevseen
+ { curveseen
+ { curve length 4 eq
+ { xprev yprev
+ curve 0 get curve 1 get
+ curve 2 get curve 3 get
+ xcurr ycurr
+ ldiagsetcurve pop pop pop
+ }
+ { xprev yprev xcurr ycurr
+ curve length 1 ge { curve 0 get } { 0 } ifelse
+ curve length 2 ge { curve 1 get } { 0 } ifelse
+ curve length 3 ge { curve 2 get } { true } ifelse
+ 7 1 roll
+ ldiagsetarc pop pop pop
+ } ifelse
+ }
+ { xcurr ycurr lineto
+ } ifelse
+ }
+ { xcurr ycurr moveto
+ } ifelse
+ /xprev xcurr def
+ /yprev ycurr def
+ /prevseen true def
+ /curveseen false def
+ } ifelse
+ } ifelse
+ } loop pop pop
+ end
+} def
+
+% ldiagpaintpath: paint a path of the given shape
+% /paint [ shape ] ldiagpaintpath -
+/ldiagpaintpath
+{
+ ldiagsetpath cvx exec
+} def
+
+% stroke a path of the given shape in the given linestyle and dash length.
+% Return the origin and angle of the backward and forward arrow heads.
+% dashlength /linestyle [shape] ldiagdopath [<point> <angle>] [<point> <angle>]
+/ldiagdopath
+{
+ 10 dict begin
+ 0
+ /prevseen false def
+ /curveseen false def
+ /backarrow [] def
+ /fwdarrow [] def
+ {
+ ldiaggetnextitem
+ dup 0 eq { pop exit }
+ {
+ 1 eq
+ { /curveseen true def
+ /curve exch def
+ curve length 0 eq { /prevseen false def } if
+ }
+ { /ycurr exch def
+ /xcurr exch def
+ prevseen
+ { newpath xprev yprev moveto
+ curveseen
+ { curve length 4 eq
+ { xprev yprev
+ curve 0 get curve 1 get
+ curve 2 get curve 3 get
+ xcurr ycurr ldiagsetcurve
+ }
+ { xprev yprev xcurr ycurr
+ curve length 1 ge { curve 0 get } { 0 } ifelse
+ curve length 2 ge { curve 1 get } { 0 } ifelse
+ curve length 3 ge { curve 2 get } { true } ifelse
+ 7 1 roll
+ ldiagsetarc
+ } ifelse
+ }
+ { xcurr ycurr lineto
+ xcurr ycurr xprev yprev ldiagangleto dup 180 sub
+ xprev yprev xcurr ycurr ldiagdistance
+ } ifelse
+ 6 index 6 index cvx exec
+ [ xprev yprev 5 -1 roll ]
+ backarrow length 0 eq
+ { /backarrow exch def }
+ { pop } ifelse
+ [ xcurr ycurr 4 -1 roll ] /fwdarrow exch def
+ } if
+ /xprev xcurr def
+ /yprev ycurr def
+ /prevseen true def
+ /curveseen false def
+ } ifelse
+ } ifelse
+ } loop
+ pop pop pop pop
+ backarrow length 0 eq { [ 0 0 0 ] } { backarrow } ifelse
+ fwdarrow length 0 eq { [ 0 0 0 ] } { fwdarrow } ifelse
+ end
+} def
+
+
+% stroke a path of the given shape in the given linestyle and dash length.
+% dashlength [ /linestyle ] [shape] ldiagdosegpath -
+/ldiagdosegpath
+{
+ 12 dict begin
+ 1 index /seg exch def
+ 1 index length /seglength exch def
+ 0 /segcount exch def
+ 0
+ /prevseen false def
+ /curveseen false def
+ /backarrow [] def
+ /fwdarrow [] def
+ {
+ ldiaggetnextitem
+ dup 0 eq { pop exit }
+ {
+ 1 eq
+ { /curveseen true def
+ /curve exch def
+ curve length 0 eq { /prevseen false def } if
+ }
+ { /ycurr exch def
+ /xcurr exch def
+ prevseen
+ { newpath xprev yprev moveto
+ curveseen
+ { curve length 4 eq
+ { xprev yprev
+ curve 0 get curve 1 get
+ curve 2 get curve 3 get
+ xcurr ycurr ldiagsetcurve
+ }
+ { xprev yprev xcurr ycurr
+ curve length 1 ge { curve 0 get } { 0 } ifelse
+ curve length 2 ge { curve 1 get } { 0 } ifelse
+ curve length 3 ge { curve 2 get } { true } ifelse
+ 7 1 roll
+ ldiagsetarc
+ } ifelse
+ }
+ { xcurr ycurr lineto
+ xcurr ycurr xprev yprev ldiagangleto dup 180 sub
+ xprev yprev xcurr ycurr ldiagdistance
+ } ifelse
+ 6 index seg segcount seglength mod get cvx exec
+ /segcount segcount 1 add def
+ [ xprev yprev 5 -1 roll ]
+ backarrow length 0 eq
+ { /backarrow exch def }
+ { pop } ifelse
+ [ xcurr ycurr 4 -1 roll ] /fwdarrow exch def
+ } if
+ /xprev xcurr def
+ /yprev ycurr def
+ /prevseen true def
+ /curveseen false def
+ } ifelse
+ } ifelse
+ } loop
+ pop pop pop pop
+ end
+} def
+
+% ldiagnodebegin: start of node parameters
+% ldiagnodebegin -
+/ldiagnodebegin
+{ % (Entering ldiagnodebegin) 0 ldiagdebugprint
+ ldiagmaxlabels dict begin
+} def
+
+% ldiagnodeend: end of node parameters (so do the node)
+% <outline> <dashlength> <style> <linewidth> <paint> ldiagnodeend -
+/ldiagnodeend
+{
+ % (Entering ldiagnodeend) 0 ldiagdebugprint
+ end % matches begin in ldiagnodebegin
+ 4 index gsave ldiagpaintpath grestore
+ 3 index ldiagsetpath clip newpath
+ 2 mul setlinewidth
+ 3 -1 roll ldiagdosegpath
+ % (Leaving ldiagnodeend) 0 ldiagdebugprint
+} def
+
+% ldiaglinkbegin: start of link parameters
+% <direct> ldiaglinkbegin -
+/ldiaglinkbegin
+{ ldiagmaxlabels dict begin
+ 1 eq /direct exch def
+} def
+
+% ldiaglinkend: end of link parameters (so do the link)
+% <outline> <dashlength> <style> <linewidth> ldiaglinkend -
+/ldiaglinkend
+{
+ end % matches begin in ldiaglinkbegin
+ setlinewidth
+ 3 -1 roll ldiagdosegpath
+} def
+
+% ldiagdoarrow: draw an arrow head of given form
+% dashlength /lstyle /pstyle hfrac height width [ <point> <angle> ] ldiagdoarrow -
+/ldiagdoarrow
+{ matrix currentmatrix 8 1 roll
+ dup 0 get 1 index 1 get translate
+ 2 get rotate
+ [ 2 index neg 2 index 0 0
+ 3 index 3 index neg
+ 1 index 10 index mul 0
+ 7 index 7 index ]
+ 4 1 roll pop pop pop
+ dup 3 1 roll
+ gsave ldiagpaintpath grestore ldiagdopath pop pop
+ setmatrix
+} def
+
+% arrow head styles
+/ldiagopen 0.0 def
+/ldiaghalfopen 0.5 def
+/ldiagclosed 1.0 def
+
+% stroke no arrows, forward, back, and both
+/ldiagnoarrow { pop pop pop pop pop pop pop pop } def
+/ldiagforward { 7 -1 roll ldiagdoarrow pop } def
+/ldiagback { 8 -2 roll pop ldiagdoarrow } def
+/ldiagboth { 8 -1 roll 7 copy ldiagdoarrow pop 7 -1 roll ldiagdoarrow } def
+
+% ldiagprevious: return previous point on path
+/ldiagprevious
+{ ldiagisnumbertype
+ { 2 copy }
+ { ldiagisarraytype
+ { 2 index 2 index }
+ { 0 0 }
+ ifelse
+ } ifelse
+} def
+
+% Tag dictionary operators
+%
+% Diag's tag dictionaries are kept on the same stack as other dictionaries,
+% since there is nowhere else to put them. However, they are managed like
+% a separate stack using the following operators:
+%
+% <tag> ldiagpushtagdict - Push a new, empty tag dictionary
+% ldiagtoptagdict dict Find the top tag dictionary
+% ldiagpoptagdict - Pop and destroy the top tag dictionary
+% ldiagpopuptagdict - Pop top tag dict and promote its entries
+% ldiagdebugtagdict - Debug print of dictionary stack
+%
+% They are distinguished from other dictionaries by containing /ldiagtagdict,
+% whose value is the <tag> which is used by ldiagpopuptagdict,
+% and they are hopefully never the target of any non-tag definition because
+% they are never the top dictionary, since push places the new dict second.
+
+/ldiagpushtagdict
+{ ldiagmaxlabels dict dup
+ currentdict end exch begin begin
+ exch /ldiagtagdict exch put
+} def
+
+/ldiagtoptagdict
+{ /ldiagtagdict where not
+ { (Diag internal error: no tag dictionary) show stop
+ } if
+} def
+
+/ldiagpoptagdict
+{
+ % (Entering poptagdict) 0 ldiagdebugprint
+ % ldiagdebugtagdict
+ mark
+ { currentdict end
+ dup /ldiagtagdict known
+ { exit
+ } if
+ } loop
+ pop
+ counttomark
+ { begin
+ } repeat
+ pop
+ % (Leaving poptagdict) 0 ldiagdebugprint
+ % ldiagdebugtagdict
+} def
+
+% promote labels from top tag dictionary to second top tag dictionary
+% each prefixed by <string>@ if <string> (value of /ldiagtagdict) is not empty
+% - ldiagpopuptagdict -
+/ldiagpopuptagdict
+{
+ ldiagtagdict
+ % (Entering ldiagpopuptagdict) 1 ldiagdebugprint
+ % ldiagdebugtagdict
+ ldiagtoptagdict ldiagpoptagdict ldiagtoptagdict exch
+ { exch 50 string cvs 3 index
+ dup length 0 ne
+ { (@) ldiagconcat
+ } if
+ exch ldiagconcat cvn exch 2 index 3 1 roll put
+ } forall
+ pop pop
+ % (Leaving ldiagpopuptagdict) 0 ldiagdebugprint
+ % ldiagdebugtagdict
+} def
+
+% debug tag dictionary stack
+/ldiagdebugtagdict
+{ (Entering ldiagdebugtagdict) 0 ldiagdebugprint
+ 30 array dictstack
+ { dup /ldiagtagdict known
+ { dup /ldiagtagdict get 0 ldiagdebugprint
+ { pop 50 string cvs ( ) exch ldiagconcat
+ dup 0 ldiagdebugprint
+ pop
+ }
+ forall
+ }
+ { pop (other) 0 ldiagdebugprint
+ } ifelse
+ } forall
+ (Leaving ldiagdebugtagdict) 0 ldiagdebugprint
+} def
+
+% label a point in top tag dictionary: <point> /name ldiagpointdef -
+/ldiagpointdef
+{
+ % (Entering ldiagpointdef) 3 ldiagdebugprint
+ [ 4 2 roll transform /itransform cvx ] cvx
+ ldiagtoptagdict 3 1 roll put
+ % (Leaving ldiagpointdef) 0 ldiagdebugprint
+} def
+
+% label an angle in top tag dictionary: <angle> /name ldiagangledef -
+/ldiagangledef
+{
+ % (Entering ldiagangledef) 2 ldiagdebugprint
+ exch ldiagfixangle ldiagtoptagdict 3 1 roll put
+ % (Leaving ldiagangledef) 0 ldiagdebugprint
+} def
+
+% add CIRCUM operator with this body: <array> ldiagcircumdef -
+/ldiagcircumdef
+{ % (Entering ldiagcircumdef) 1 ldiagdebugprint
+ /CIRCUM exch cvx
+ ldiagtoptagdict 3 1 roll put
+ % currentdict end
+ % 3 1 roll
+ % def
+ % begin
+ % (Leaving ldiagcircumdef) 0 ldiagdebugprint
+} def
+
+% show points (except CIRCUM and ANGLE): - ldiagshowpoints -
+/ldiagshowpoints
+{
+ % (Entering ldiagshowpoints) 0 ldiagdebugprint
+ ldiagtoptagdict
+ { 1 index 50 string cvs
+ (ldiagdebugpos) search
+ { pop pop pop pop pop }
+ {
+ (CIRCUM) search % if CIRCUM in key
+ { pop pop pop pop pop }
+ {
+ (ANGLE) search % if ANGLE in key
+ {
+ pop pop pop pop pop
+ }
+ {
+ (ldiagtagdict) search
+ {
+ pop pop pop pop pop
+ }
+ {
+ pop cvx exec
+ newpath 2.0 pt 0 360 arc 0 setgray fill pop
+ } ifelse
+ } ifelse
+ } ifelse
+ } ifelse
+ } forall
+ % (Leaving ldiagshowpoints) 0 ldiagdebugprint
+} def
+
+
+/ldiagshowtags
+{
+ % (Entering ldiagshowtags) 0 ldiagdebugprint
+ ldiagtoptagdict
+ { 1 index 50 string cvs
+ % dup 0 ldiagdebugprint
+ (ldiagdebugpos) search
+ { pop pop pop pop pop }
+ {
+ (CIRCUM) search % if CIRCUM in key
+ { pop pop pop pop pop }
+ {
+ (ANGLE) search % if ANGLE in key
+ {
+ pop pop pop pop pop
+ }
+ {
+ (ldiagtagdict) search
+ {
+ pop pop pop pop pop
+ }
+ {
+ pop cvx exec 2 copy
+ gsave
+ newpath 2.0 pt 0 360 arc 0 setgray fill
+ /Times-Roman findfont 8 pt scalefont setfont
+ translate 40 rotate 0.2 cm 0.1 cm moveto 20 string cvs show
+ grestore
+ } ifelse
+ } ifelse
+ } ifelse
+ } ifelse
+ } forall
+ % (Leaving ldiagshowtags) 0 ldiagdebugprint
+} def
+
+
+% show angles: - ldiagshowangles -
+/ldiagshowangles
+{
+ % (Entering ldiagshowangles) 0 ldiagdebugprint
+ ldiagtoptagdict
+ { 1 index 20 string cvs
+ % dup 0 ldiagdebugprint
+ (ldiagdebugpos) search
+ { pop pop pop pop pop }
+ {
+ (ldiagtagdict) search
+ {
+ pop pop pop pop pop
+ }
+ {
+ (CIRCUM) search % if CIRCUM in key
+ { pop pop pop pop pop }
+ {
+ (@ANGLE) search % if ANGLE in key, draw the angle at the point
+ {
+ % (showing ANGLE) 5 ldiagdebugprint
+ gsave exch pop exch pop cvx
+ % (about to execute) 1 ldiagdebugprint
+ exec translate rotate 0.8 0.8 scale pop
+ newpath 0 0 2.0 pt 0 360 arc 0 setgray fill
+ newpath 4 pt 0 moveto 9 pt 0 lineto
+ 9 pt 1.5 pt lineto 11 pt 0 lineto 9 pt -1.5 pt lineto
+ 9 pt 0 lineto [] 0 setdash 4 pt setlinewidth 0 setlinejoin
+ stroke grestore
+ % (finished ANGLE) 5 ldiagdebugprint
+ }
+ {
+ % else must be a point, we aren't showing those
+ pop pop pop
+ } ifelse
+ } ifelse
+ } ifelse
+ } ifelse
+ } forall
+ % (Leaving ldiagshowangles) 0 ldiagdebugprint
+} def
+
+% fix an angle to 0 <= res < 360: <angle> ldiagfixangle <angle>
+/ldiagfixangle
+{
+ % (Entering ldiagfixangle) 1 ldiagdebugprint
+ { dup 0 ge { exit } if
+ 360 add
+ } loop
+ { dup 360 lt { exit } if
+ 360 sub
+ } loop
+ % (Leaving ldiagfixangle) 1 ldiagdebugprint
+} def
+
+% find point on circumference of box: alpha a b ldiagboxcircum x y
+/ldiagboxcircum
+{
+ % (Entering ldiagboxcircum) 3 ldiagdebugprint
+ 4 dict begin
+ /b exch def
+ /a exch def
+ ldiagfixangle /alpha exch def
+ 0 0 a b ldiagangleto /theta exch def
+
+ % if alpha <= theta, return (a, a*tan(alpha))
+ alpha theta le
+ { a a alpha sin mul alpha cos div }
+ {
+ % else if alpha <= 180 - theta, return (b*cot(alpha), b)
+ alpha 180 theta sub le
+ { b alpha cos mul alpha sin div b }
+ {
+ % else if alpha <= 180 + theta, return (-a, -a*tan(alpha))
+ alpha 180 theta add le
+ { a neg a neg alpha sin mul alpha cos div }
+ {
+ % else if alpha <= 360 - theta, return (-b*cot(alpha), -b)
+ alpha 360 theta sub le
+ { b neg alpha cos mul alpha sin div b neg }
+ {
+ % else 360 - theta <= alpha, return (a, a*tan(alpha))
+ a a alpha sin mul alpha cos div
+ } ifelse
+ } ifelse
+ } ifelse
+ } ifelse
+ end
+ % (Leaving ldiagboxcircum) 2 ldiagdebugprint
+} def
+
+% find quadratic roots (assume a != 0): a b c ldiagqroots x1 x2 2
+% or x2 1
+% or 0
+/ldiagqroots
+{
+ 4 dict begin
+ /c exch def
+ /b exch def
+ /a exch def
+ /disc b b mul 4 a c mul mul sub def
+ disc 0 lt
+ { 0
+ }
+ { disc 0 eq
+ { b neg 2 a mul div
+ 1
+ }
+ { b neg disc sqrt add 2 a mul div
+ b neg disc sqrt sub 2 a mul div
+ 2
+ }
+ ifelse
+ }
+ ifelse
+ end
+} def
+
+% work our which quadrant: <angle> ldiagquadrant <0-3>
+/ldiagquadrant
+{ dup 90 lt
+ { pop 0
+ }
+ { dup 180 lt
+ { pop 1
+ }
+ { 270 lt
+ { 2
+ }
+ { 3
+ } ifelse
+ } ifelse
+ } ifelse
+} def
+
+% find curvebox circum, assuming upper right quadrant: alpha a b xmk ldiagcb x y
+/ldiagcb
+{
+ 6 dict begin
+ /xmk exch def
+ /b exch def
+ /a exch def
+ /alpha exch def
+ /theta1 0 0 a b xmk sub ldiagangleto def
+ /theta2 0 0 a xmk sub b ldiagangleto def
+ alpha theta1 le
+ { % if alpha <= theta1, return (a, a*tan(alpha))
+ a a alpha sin mul alpha cos div
+ }
+ { alpha theta2 ge
+ { % else if alpha > theta2, return (b*cot(alpha), b)
+ b alpha cos mul alpha sin div b
+ }
+ {
+ % else, return the intersection of line and circle
+ a xmk sub b xmk sub xmk 0 0 alpha ldiagcircleintersect
+ dup 0 eq
+ { % should never happen, just return any reasonable point
+ pop
+ a b 0.5 ldiagpmul
+ }
+ { 1 eq
+ { % should never happen, just return the point on top of stack
+ }
+ { % the usual case, two points on stack, return the larger
+ ldiagpmax
+ } ifelse
+ } ifelse
+ } ifelse
+ } ifelse
+ end
+} def
+
+% find point on circumference of curvebox: alpha a b xmk ldiagcurveboxcircum x y
+/ldiagcurveboxcircum
+{
+ % (Entering ldiagcurveboxcircum) 4 ldiagdebugprint
+ 5 dict begin
+ /xmk exch def
+ /b exch def
+ /a exch def
+ ldiagfixangle /alpha exch def
+
+ % work out which quadrant we are in, and reflect accordingly
+ /quad alpha ldiagquadrant def
+ quad 0 eq
+ { alpha a b xmk ldiagcb
+ }
+ { quad 1 eq
+ { 180 alpha sub a b xmk ldiagcb exch neg exch
+ }
+ { quad 2 eq
+ { alpha 180 sub a b xmk ldiagcb neg exch neg exch
+ }
+ { 360 alpha sub a b xmk ldiagcb neg
+ } ifelse
+ } ifelse
+ } ifelse
+ end
+ % (Leaving ldiagcurveboxcircum) 2 ldiagdebugprint
+} def
+
+% find point on circumference of diamond: alpha a b ldiagdiamondcircum x y
+/ldiagdiamondcircum
+{
+ % (Entering ldiagdiamondcircum) 3 ldiagdebugprint
+ 4 dict begin
+ /b exch def
+ /a exch def
+ ldiagfixangle /alpha exch def
+ b alpha cos abs mul a alpha sin abs mul add /denom exch def
+ a b mul alpha cos mul denom div
+ a b mul alpha sin mul denom div
+ end
+ % (Leaving ldiagdiamondcircum) 2 ldiagdebugprint
+} def
+
+% find point on circumference of ellipse: alpha a b ldiagellipsecircum x y
+/ldiagellipsecircum
+{
+ % (Entering ldiagellipsecircum) 3 ldiagdebugprint
+ 4 dict begin
+ /b exch def
+ /a exch def
+ ldiagfixangle /alpha exch def
+ b alpha cos mul dup mul a alpha sin mul dup mul add sqrt /denom exch def
+ a b mul alpha cos mul denom div
+ a b mul alpha sin mul denom div
+ end
+ % (Leaving ldiagellipsecircum) 2 ldiagdebugprint
+} def
+
+% find point on circumference of isosceles: alpha a b ldiagisoscelescircum x y
+/ldiagisoscelescircum
+{
+ % (Entering ldiagisoscelescircum) 3 ldiagdebugprint
+ 7 dict begin
+ /b exch def
+ /a exch def
+ /alpha exch ldiagfixangle def
+ /theta1 90 def
+ /theta2 a b 0.5 ldiagpmul 0 0 ldiagangleto def
+ /theta3 a b 0.5 ldiagpmul a 0 ldiagangleto def
+ alpha theta1 ge alpha theta2 le and
+ { 0 0 a 2 div b
+ }
+ { alpha theta2 ge alpha theta3 le and
+ { 0 0 a 0
+ }
+ { a 0 a 2 div b
+ } ifelse
+ } ifelse
+ a 2 div b 2 div 2 copy 1 ft alpha ldiagatangle ldiaglineintersect
+ a 2 div b 2 div 4 2 roll ldiagpsub
+ end
+ % (Leaving ldiagisoscelescircum) 2 ldiagdebugprint
+} def
+
+% find point of intersection of two lines each defined by two points
+% x1 y1 x2 y2 x3 y3 x4 y4 ldiaglineintersect x y
+/ldiaglineintersect
+{
+ % (Entering ldiaglineintersect) 8 ldiagdebugprint
+ 13 dict begin
+ /y4 exch def
+ /x4 exch def
+ /y3 exch def
+ /x3 exch def
+ /y2 exch def
+ /x2 exch def
+ /y1 exch def
+ /x1 exch def
+ x2 x1 sub /x21 exch def
+ x4 x3 sub /x43 exch def
+ y2 y1 sub /y21 exch def
+ y4 y3 sub /y43 exch def
+ y21 x43 mul y43 x21 mul sub /det exch def
+
+ % calculate x
+ y21 x43 mul x1 mul
+ y43 x21 mul x3 mul sub
+ y3 y1 sub x21 mul x43 mul add
+ det div
+
+ % calculate y
+ x21 y43 mul y1 mul
+ x43 y21 mul y3 mul sub
+ x3 x1 sub y21 mul y43 mul add
+ det neg div
+
+ end
+ % (Leaving ldiaglineintersect) 2 ldiagdebugprint
+} def
+
+% find point on circumference of polygon
+% alpha radius num theta ldiagpolycircum x y
+/ldiagpolycircum
+{
+ % (Entering ldiagpolycircum) 4 ldiagdebugprint
+ 13 dict begin
+ /theta exch def
+ /num exch def
+ /radius exch def
+ /alpha exch def
+
+ % calculate delta, the angle from theta to alpha
+ alpha theta sub ldiagfixangle
+
+ % calculate the angle which is the multiple of 360/num closest to delta
+ 360 num div div truncate 360 num div mul theta add /anglea exch def
+
+ % calculate the next multiple of 360/num after anglea
+ anglea 360 num div add /angleb exch def
+
+ % intersect the line through these two points with the alpha line
+ anglea cos anglea sin angleb cos angleb sin
+ 0 0 alpha cos 2 mul alpha sin 2 mul
+ ldiaglineintersect radius ldiagpmul
+
+ end
+ % (Leaving ldiagpolycircum) 2 ldiagdebugprint
+} def
+
+% find point of intersection of a line and a circle
+% x0 y0 r x1 y1 theta ldiagcircleintersect xa ya xb yb 2
+% or xb yb 1
+% or 0
+/ldiagcircleintersect
+{
+ % (Entering ldiagcircleintersect) 6 ldiagdebugprint
+ 15 dict begin
+ /theta exch def
+ /y1 exch def
+ /x1 exch def
+ /r exch def
+ /y0 exch def
+ /x0 exch def
+
+ % if sin(theta) = 0 then line is horizontal and y must be y1
+ theta sin abs 0.00001 lt
+ {
+ /a 1 def
+ /b -2 x0 mul def
+ /c x0 dup mul y1 y0 sub dup mul add r dup mul sub def
+ a b c ldiagqroots dup
+ 0 eq
+ { pop
+ 0
+ }
+ { 1 eq
+ { y1 1
+ }
+ { y1 exch y1 2
+ } ifelse
+ } ifelse
+ }
+ {
+ /ct theta cos theta sin div def
+ /a ct ct mul 1 add def
+ /b ct x1 x0 sub mul y1 add y0 sub 2 mul def
+ /c x1 x0 sub dup mul y1 y0 sub dup mul add r dup mul sub def
+ a b c ldiagqroots dup
+ 0 eq
+ { pop
+ 0
+ }
+ { 1 eq
+ { y1 add /yb exch def
+ yb y1 sub ct mul x1 add /xb exch def
+ xb yb 1
+ }
+ { y1 add /ya exch def
+ ya y1 sub ct mul x1 add /xa exch def
+ y1 add /yb exch def
+ yb y1 sub ct mul x1 add /xb exch def
+ xa ya xb yb 2
+ } ifelse
+ } ifelse
+ } ifelse
+ end
+ % (Leaving ldiagcircleintersect) 1 ldiagdebugprint
+} def
+
+% find line which is the perpendicular bisector of two points, defined
+% by two points
+% x1 y1 x2 y2 ldiaglinebetween x3 y3 x4 y4
+/ldiaglinebetween
+{ % (Entering ldiaglinebetween) 4 ldiagdebugprint
+ /y2 exch def /x2 exch def
+ /y1 exch def /x1 exch def
+
+ % let x3, y3 be the point halfway between the two points
+ x1 y1 x2 y2 ldiagpadd 0.5 ldiagpmul
+ /y3 exch def /x3 exch def
+
+ % find a point perpendicular to x3, y3
+ x3 y3 50 x1 y1 x2 y2 ldiagangleto 90 dg add ldiagatangle
+
+ % plus x3 y3 gives the two points
+ x3 y3
+
+ % (Leaving ldiaglinebetween) 4 ldiagdebugprint
+} def
+
+% find <proc>@<string>: <proc> <string> ldiagfindlabel <any> true
+% <proc> <string> false
+/ldiagfindlabel
+{
+ % (Entering ldiagfindlabel) 2 ldiagdebugprint
+ exch dup length 1 ne
+ { exch false
+ % (Leaving ldiagfindabel (length not 1)) 3 ldiagdebugprint
+ }
+ { dup 0 get type /nametype ne
+ { exch false
+ % (Leaving ldiagfindabel (not a name)) 3 ldiagdebugprint
+ }
+ { dup 0 get 50 string cvs (@) ldiagconcat 2 index ldiagconcat dup where
+ { exch get exch pop exch pop cvx exec true
+ % (Leaving ldiagfindlabel with success) 100 ldiagdebugprint
+ }
+ {
+ pop exch false
+ % (Leaving ldiagfindabel (concat not sensible)) 3 ldiagdebugprint
+ } ifelse
+ } ifelse
+ } ifelse
+} bind def
+
+% execute <proc>@<string> or else default: <proc> <string> ldiagdolabel <various>
+/ldiagdolabel
+{
+ % (Entering ldiagdolabel) 2 ldiagdebugprint
+ ldiagfindlabel not
+ {
+ dup (CIRCUM) eq
+ { pop pop pop 0 0
+ }
+ {
+ dup (ANGLE) eq
+ { pop pop 0
+ }
+ { pop cvx exec
+ } ifelse
+ } ifelse
+ } if
+ % (Leaving ldiagdolabel) 2 ldiagdebugprint
+} bind def
+
+% execute a proc depending on whether number is negative, zero, or positive
+% procneg proczero procpos number ldiagsigncase <anything>
+/ldiagsigncase
+{
+ % (Entering ldiagsigncase) 4 ldiagdebugprint
+ dup 0 lt
+ { pop pop pop exec
+ }
+ { 0 gt
+ { exch pop exch pop exec
+ }
+ { pop exch pop exec
+ } ifelse
+ } ifelse
+ % (Leaving ldiagsigncase) 0 ldiagdebugprint
+} bind def
+
+% execute proci if angle is in ith quadrant
+% proc45 proc270 proc180 proc90 proc0 proc315 proc225 proc135 angle ldiagquadcase <anything>
+/ldiagquadcase
+{
+ % (Entering ldiagquadcase) 9 ldiagdebugprint
+ round ldiagfixangle cvi dup 90 mod 0 eq
+ { 90 idiv 4 add } { 90 idiv } ifelse
+ 8 exch roll pop pop pop pop pop pop pop exec
+ % (Leaving ldiagquadcase) 0 ldiagdebugprint
+} bind def
+
+% decode Lout length into PostScript length
+% <string> ldiagdecodelength <number>
+/ldiagdecodelength
+{
+ % (Entering ldiagdecodelength) 1 ldiagdebugprint
+ (f) search
+ { exch pop exch pop cvr ft
+ }
+ { (c) search
+ { exch pop exch pop cvr cm
+ }
+ { (p) search
+ { exch pop exch pop cvr pt
+ }
+ { (m) search
+ { exch pop exch pop cvr em
+ }
+ { (s) search
+ { exch pop exch pop cvr sp
+ }
+ { (v) search
+ { exch pop exch pop cvr vs
+ }
+ { (i) search
+ { exch pop exch pop cvr in
+ }
+ { pop 0
+ } ifelse
+ } ifelse
+ } ifelse
+ } ifelse
+ } ifelse
+ } ifelse
+ } ifelse
+ % (Leaving ldiagdecodelength) 1 ldiagdebugprint
+} def
+
+% implement aabout function
+% logical form: <circum> <extra> <centre> aabout <point>
+% actual form: { <labelorpoint> } cvlit <length> [ <point> ] cvx aabout <point>
+/ldiagaabout
+{
+ /centre exch def
+ /extra exch def
+ /circum exch def
+
+ /ZXCTR [ centre ] cvx def
+ /ZFCTR [ circum (CTR) ldiagdolabel ] cvx def
+ /ZAREF ZFCTR ZXCTR ldiagangleto def
+ /ZAMIN 0 dg def
+ /ZPMIN [ circum (CTR) ldiagdolabel ZAREF ZAMIN sub
+ circum (CIRCUM) ldiagdolabel ldiagpadd
+ 0 0 extra ZAREF ZAMIN sub ldiagatangle
+ ldiagpadd ] cvx def
+
+ /ZAMAX 90 dg def
+ /ZPMAX [ circum (CTR) ldiagdolabel ZAREF ZAMAX sub
+ circum (CIRCUM) ldiagdolabel ldiagpadd
+ 0 0 extra ZAREF ZAMAX sub ldiagatangle
+ ldiagpadd ] cvx def
+
+ 1 1 20
+ { /xval exch def
+ /ZAMID ZAMIN ZAMAX add 0.5 mul def
+ /ZPMID [ circum (CTR) ldiagdolabel ZAREF ZAMID sub
+ circum (CIRCUM) ldiagdolabel ldiagpadd
+ 0 0 extra ZAREF ZAMID sub ldiagatangle
+ ldiagpadd ] cvx def
+ ZPMID ZXCTR ldiagdistance ZFCTR ZXCTR ldiagdistance gt
+ {
+ /ZAMAX [ ZAMID ] cvx def
+ /ZPMAX [ ZPMID ] cvx def
+ }
+ {
+ /ZAMIN [ ZAMID ] cvx def
+ /ZPMIN [ ZPMID ] cvx def
+ } ifelse
+ } for
+ ZPMID
+} def
+
+% implement cabout function
+% logical form: <circum> <extra> <centre> cabout <point>
+% actual form: { <labelorpoint> } cvlit <length> [ <point> ] cvx cabout <point>
+/ldiagcabout
+{
+ /centre exch def
+ /extra exch def
+ /circum exch def
+
+ /ZXCTR [ centre ] cvx def
+ /ZFCTR [ circum (CTR) ldiagdolabel ] cvx def
+ /ZAREF ZFCTR ZXCTR ldiagangleto def
+ /ZAMIN 0 dg def
+ /ZPMIN [ circum (CTR) ldiagdolabel ZAREF ZAMIN add
+ circum (CIRCUM) ldiagdolabel ldiagpadd
+ 0 0 extra ZAREF ZAMIN add ldiagatangle
+ ldiagpadd ] cvx def
+
+ /ZAMAX 90 dg def
+ /ZPMAX [ circum (CTR) ldiagdolabel ZAREF ZAMAX add
+ circum (CIRCUM) ldiagdolabel ldiagpadd
+ 0 0 extra ZAREF ZAMAX add ldiagatangle
+ ldiagpadd ] cvx def
+
+ 1 1 20
+ { /xval exch def
+ /ZAMID ZAMIN ZAMAX add 0.5 mul def
+ /ZPMID [ circum (CTR) ldiagdolabel ZAREF ZAMID add
+ circum (CIRCUM) ldiagdolabel ldiagpadd
+ 0 0 extra ZAREF ZAMID add ldiagatangle
+ ldiagpadd ] cvx def
+ ZPMID ZXCTR ldiagdistance ZFCTR ZXCTR ldiagdistance gt
+ {
+ /ZAMAX [ ZAMID ] cvx def
+ /ZPMAX [ ZPMID ] cvx def
+ }
+ {
+ /ZAMIN [ ZAMID ] cvx def
+ /ZPMIN [ ZPMID ] cvx def
+ } ifelse
+ } for
+ ZPMID
+} def
+
+% fromarrowlength toarrowlength { from } { to } xindent zindent ldiaglinepath -
+/ldiaglinepath
+{
+ % (entering ldiaglinepath) 0 ldiagdebugprint
+ /zindent exch def
+ /xindent exch def
+ cvlit /to exch def
+ cvlit /from exch def
+ /toarrowlength exch def
+ /fromarrowlength exch def
+
+ from (CTR) ldiagdolabel to (CTR) ldiagdolabel ldiagangleto
+ /FROM@ANGLE ldiagangledef
+ from (CTR) ldiagdolabel FROM@ANGLE from (CIRCUM) ldiagdolabel ldiagpadd
+ 0 0 fromarrowlength FROM@ANGLE ldiagatangle ldiagpadd
+ /FROM ldiagpointdef
+
+ FROM@ANGLE /TO@ANGLE ldiagangledef
+ to (CTR) ldiagdolabel TO@ANGLE 180 dg sub to (CIRCUM) ldiagdolabel ldiagpadd
+ 0 0 toarrowlength TO@ANGLE 180 dg sub ldiagatangle ldiagpadd /TO ldiagpointdef
+
+ FROM 0.5 ldiagpmul TO 0.5 ldiagpmul ldiagpadd /LMID ldiagpointdef
+ FROM@ANGLE /LMID@ANGLE ldiagangledef
+
+ /XINDENT xindent FROM LMID ldiagdistance ldiagmin def
+ FROM 0 0 XINDENT FROM@ANGLE ldiagatangle ldiagpadd /LFROM ldiagpointdef
+ FROM@ANGLE /LFROM@ANGLE ldiagangledef
+
+ /ZINDENT zindent TO LMID ldiagdistance ldiagmin def
+ 0 0 ZINDENT FROM@ANGLE ldiagatangle TO ldiagpsub /LTO ldiagpointdef
+ FROM@ANGLE /LTO@ANGLE ldiagangledef
+
+ direct { FROM TO } { FROM LFROM LMID LTO TO } ifelse
+
+ % (leaving ldiaglinepath) 0 ldiagdebugprint
+} def
+
+% fromarrowlength toarrowlength { from } { to } xindent zindent pathgap ldiagdoublelinepath -
+/ldiagdoublelinepath
+{
+ % (entering ldiagdoublelinepath) 0 ldiagdebugprint
+ /pathgap exch def
+ /zindent exch def
+ /xindent exch def
+ cvlit /to exch def
+ cvlit /from exch def
+ /toarrowlength exch def
+ /fromarrowlength exch def
+
+ from (CTR) ldiagdolabel to (CTR) ldiagdolabel ldiagangleto
+ /FROM@ANGLE ldiagangledef
+ from (CTR) ldiagdolabel FROM@ANGLE from (CIRCUM) ldiagdolabel ldiagpadd
+ 0 0 fromarrowlength FROM@ANGLE ldiagatangle ldiagpadd
+ /FROM ldiagpointdef
+
+ FROM@ANGLE /TO@ANGLE ldiagangledef
+ to (CTR) ldiagdolabel TO@ANGLE 180 dg sub to (CIRCUM) ldiagdolabel ldiagpadd
+ 0 0 toarrowlength TO@ANGLE 180 dg sub ldiagatangle ldiagpadd /TO ldiagpointdef
+
+ FROM 0.5 ldiagpmul TO 0.5 ldiagpmul ldiagpadd /LMID ldiagpointdef
+ FROM@ANGLE /LMID@ANGLE ldiagangledef
+
+ /XINDENT xindent FROM LMID ldiagdistance ldiagmin def
+ FROM 0 0 XINDENT FROM@ANGLE ldiagatangle ldiagpadd /LFROM ldiagpointdef
+ FROM@ANGLE /LFROM@ANGLE ldiagangledef
+
+ /ZINDENT zindent TO LMID ldiagdistance ldiagmin def
+ 0 0 ZINDENT FROM@ANGLE ldiagatangle TO ldiagpsub /LTO ldiagpointdef
+ FROM@ANGLE /LTO@ANGLE ldiagangledef
+
+ direct {
+ FROM pathgap 2 div FROM@ANGLE 90 dg sub ldiagatangle
+ TO pathgap 2 div FROM@ANGLE 90 dg sub ldiagatangle
+ []
+ FROM pathgap 2 div FROM@ANGLE 90 dg add ldiagatangle
+ TO pathgap 2 div FROM@ANGLE 90 dg add ldiagatangle
+ }
+ {
+ FROM pathgap 2 div FROM@ANGLE 90 dg sub ldiagatangle
+ LFROM pathgap 2 div FROM@ANGLE 90 dg sub ldiagatangle
+ LMID pathgap 2 div FROM@ANGLE 90 dg sub ldiagatangle
+ LTO pathgap 2 div FROM@ANGLE 90 dg sub ldiagatangle
+ TO pathgap 2 div FROM@ANGLE 90 dg sub ldiagatangle
+ []
+ FROM pathgap 2 div FROM@ANGLE 90 dg add ldiagatangle
+ LFROM pathgap 2 div FROM@ANGLE 90 dg add ldiagatangle
+ LMID pathgap 2 div FROM@ANGLE 90 dg add ldiagatangle
+ LTO pathgap 2 div FROM@ANGLE 90 dg add ldiagatangle
+ TO pathgap 2 div FROM@ANGLE 90 dg add ldiagatangle
+ } ifelse
+
+ % (leaving ldiagdoublelinepath) 0 ldiagdebugprint
+} def
+
+% fromarrowlen toarrowlen { from } { to } xindent zindent bias ldiagacurvepath -
+/ldiagacurvepath
+{
+ % (entering ldiagacurvepath) 0 ldiagdebugprint
+ /bias exch def
+ /zindent exch def
+ /xindent exch def
+ cvlit /to exch def
+ cvlit /from exch def
+ /toarrowlength exch def
+ /fromarrowlength exch def
+
+ %/B1 bias 0.02 ft ldiagmax def
+ %/B2 from (CTR) ldiagdolabel to (CTR) ldiagdolabel ldiagdistance 0.5 mul def
+ %/BIAS B1 B2 ldiagmin def
+ /BIAS bias 0.02 ft ldiagmax def
+ /XMID [ from (CTR) ldiagdolabel 0.5 ldiagpmul
+ to (CTR) ldiagdolabel 0.5 ldiagpmul ldiagpadd ] cvx def
+ /XTOP [ XMID 0 0 BIAS from (CTR) ldiagdolabel to (CTR) ldiagdolabel
+ ldiagangleto 90 dg sub ldiagatangle ldiagpadd ] cvx def
+ /CTR [ from (CTR) ldiagdolabel XTOP ldiaglinebetween
+ to (CTR) ldiagdolabel XTOP ldiaglinebetween
+ ldiaglineintersect ] cvx def
+
+ from fromarrowlength [ CTR ] cvx ldiagaabout /FROM ldiagpointdef
+ from (CTR) ldiagdolabel FROM ldiagdistance 0 gt
+ { from (CTR) ldiagdolabel FROM ldiagangleto
+ }
+ { CTR FROM ldiagangleto 90 dg add
+ } ifelse /FROM@ANGLE ldiagangledef
+
+ to toarrowlength [ CTR ] cvx ldiagcabout /TO ldiagpointdef
+ TO to (CTR) ldiagdolabel ldiagdistance 0 gt
+ { TO to (CTR) ldiagdolabel ldiagangleto
+ }
+ { CTR TO ldiagangleto 90 dg add
+ } ifelse /TO@ANGLE ldiagangledef
+
+ /RADIUS CTR FROM ldiagdistance def
+ CTR 0 0 RADIUS CTR FROM ldiagangleto 360 dg CTR TO ldiagangleto
+ add CTR FROM ldiagangleto sub cvi 360 mod 0.5 mul add
+ ldiagatangle ldiagpadd /LMID ldiagpointdef
+ CTR LMID ldiagangleto 90 dg add /LMID@ANGLE ldiagangledef
+
+ /XINDENT xindent FROM LMID ldiagdistance ldiagmin def
+ CTR 0 0 RADIUS CTR FROM 0 0 XINDENT FROM@ANGLE ldiagatangle
+ ldiagpadd ldiagangleto ldiagatangle ldiagpadd /LFROM ldiagpointdef
+ CTR LFROM ldiagangleto 90 dg add /LFROM@ANGLE ldiagangledef
+
+ /ZINDENT zindent TO LMID ldiagdistance ldiagmin def
+ CTR 0 0 RADIUS CTR TO 0 0 ZINDENT TO@ANGLE 180 dg add
+ ldiagatangle ldiagpadd ldiagangleto ldiagatangle ldiagpadd /LTO ldiagpointdef
+ CTR LTO ldiagangleto 90 dg add /LTO@ANGLE ldiagangledef
+
+ direct
+ { FROM [CTR] TO }
+ { FROM [CTR] LFROM [CTR] LMID [CTR] LTO [CTR] TO }
+ ifelse
+
+ % (leaving ldiagacurvepath) 0 ldiagdebugprint
+} def
+
+% fromarrowlen toarrowlen { from } { to } xindent zindent bias ldiagccurvepath -
+/ldiagccurvepath
+{
+ % (entering ldiagccurvepath) 0 ldiagdebugprint
+ % count ( stack size is) 1 ldiagdebugprint pop
+ /bias exch def
+ /zindent exch def
+ /xindent exch def
+ cvlit /to exch def
+ cvlit /from exch def
+ /toarrowlength exch def
+ /fromarrowlength exch def
+
+ %/B1 bias 0.02 ft ldiagmax def
+ %/B2 from (CTR) ldiagdolabel to (CTR) ldiagdolabel ldiagdistance 0.5 mul def
+ %/BIAS B1 B2 ldiagmin def
+ /BIAS bias 0.02 ft ldiagmax def
+ /XMID [ from (CTR) ldiagdolabel 0.5 ldiagpmul
+ to (CTR) ldiagdolabel 0.5 ldiagpmul ldiagpadd ] cvx def
+ /XTOP [ XMID 0 0 BIAS from (CTR) ldiagdolabel to (CTR) ldiagdolabel
+ ldiagangleto 90 dg add ldiagatangle ldiagpadd ] cvx def
+ /CTR [ from (CTR) ldiagdolabel XTOP ldiaglinebetween
+ to (CTR) ldiagdolabel XTOP ldiaglinebetween ldiaglineintersect ] cvx def
+
+ from fromarrowlength [ CTR ] cvx ldiagcabout /FROM ldiagpointdef
+ from (CTR) ldiagdolabel FROM ldiagdistance 0 gt
+ { from (CTR) ldiagdolabel FROM ldiagangleto }
+ { CTR FROM ldiagangleto 90 dg sub }
+ ifelse /FROM@ANGLE ldiagangledef
+
+ to toarrowlength [ CTR ] cvx ldiagaabout /TO ldiagpointdef
+ TO to (CTR) ldiagdolabel ldiagdistance 0 gt
+ { TO to (CTR) ldiagdolabel ldiagangleto }
+ { CTR TO ldiagangleto 90 dg sub }
+ ifelse /TO@ANGLE ldiagangledef
+
+ /RADIUS [ CTR FROM ldiagdistance ] cvx def
+ CTR 0 0 RADIUS CTR TO ldiagangleto 360 dg CTR FROM ldiagangleto add
+ CTR TO ldiagangleto sub cvi 360 cvi mod 2 div add ldiagatangle
+ ldiagpadd /LMID ldiagpointdef
+ CTR LMID ldiagangleto 90 dg sub /LMID@ANGLE ldiagangledef
+
+ /XINDENT [ xindent FROM LMID ldiagdistance ldiagmin ] cvx def
+ CTR 0 0 RADIUS CTR FROM 0 0 XINDENT FROM@ANGLE ldiagatangle ldiagpadd
+ ldiagangleto ldiagatangle ldiagpadd /LFROM ldiagpointdef
+ CTR LFROM ldiagangleto 90 dg sub /LFROM@ANGLE ldiagangledef
+
+ /ZINDENT [ zindent TO LMID ldiagdistance ldiagmin ] cvx def
+ CTR 0 0 RADIUS CTR TO 0 0 ZINDENT TO@ANGLE 180 dg add ldiagatangle
+ ldiagpadd ldiagangleto ldiagatangle ldiagpadd /LTO ldiagpointdef
+ CTR LTO ldiagangleto 90 dg sub /LTO@ANGLE ldiagangledef
+
+ direct
+ { FROM [CTR clockwise] TO }
+ { FROM [CTR clockwise] LFROM [CTR clockwise]
+ LMID [CTR clockwise] LTO [CTR clockwise] TO }
+ ifelse
+ % (leaving ldiagccurvepath) 0 ldiagdebugprint
+} def
+
+
+% farr tarr { from } { to } xindent zindent [frompt] [topt] ldiagbezierpath -
+/ldiagbezierpath
+{
+ % (entering ldiagbezierpath) 0 ldiagdebugprint
+ % count ( stack size is) 1 ldiagdebugprint pop
+ cvx /topt exch def
+ cvx /frompt exch def
+ /zindent exch def
+ /xindent exch def
+ cvlit /to exch def
+ cvlit /from exch def
+ /toarrowlength exch def
+ /fromarrowlength exch def
+
+ from (CTR) ldiagdolabel frompt ldiagangleto /FROM@ANGLE ldiagangledef
+ from (CTR) ldiagdolabel FROM@ANGLE from (CIRCUM) ldiagdolabel
+ ldiagpadd 0 0 fromarrowlength FROM@ANGLE ldiagatangle ldiagpadd
+ /FROM ldiagpointdef
+
+ topt to (CTR) ldiagdolabel ldiagangleto /TO@ANGLE ldiagangledef
+ to (CTR) ldiagdolabel TO@ANGLE 180 dg add to (CIRCUM) ldiagdolabel
+ ldiagpadd 0 0 toarrowlength TO@ANGLE 180 dg add ldiagatangle ldiagpadd
+ /TO ldiagpointdef
+
+ FROM 0 0 xindent FROM@ANGLE ldiagatangle ldiagpadd
+ /LFROM ldiagpointdef
+ FROM@ANGLE /LFROM@ANGLE ldiagangledef
+
+ TO 0 0 zindent TO@ANGLE 180 dg add ldiagatangle ldiagpadd
+ /LTO ldiagpointdef
+ TO@ANGLE /LTO@ANGLE ldiagangledef
+
+ FROM TO ldiagpadd frompt ldiagpadd topt ldiagpadd 0.25 ldiagpmul
+ /LMID ldiagpointdef
+
+ FROM [frompt topt] TO
+
+ % (leaving ldiagbezierpath) 0 ldiagdebugprint
+ % count ( stack size is) 1 ldiagdebugprint pop
+} def
+
+
+% farr tarr { from } { to } xindent zindent ldiagvhlinepath -
+/ldiagvhlinepath
+{
+ % (entering ldiagvhlinepath) 0 ldiagdebugprint
+ % count ( stack size is) 1 ldiagdebugprint pop
+ /zindent exch def
+ /xindent exch def
+ cvlit /to exch def
+ cvlit /from exch def
+ /toarrowlength exch def
+ /fromarrowlength exch def
+
+ /CTR [ from (CTR) ldiagdolabel pop to (CTR) ldiagdolabel exch pop ] cvx def
+ /FANG [ from (CTR) ldiagdolabel CTR ldiagangleto ] cvx def
+ /TANG [ to (CTR) ldiagdolabel CTR ldiagangleto ] cvx def
+
+ from (CTR) ldiagdolabel FANG from (CIRCUM) ldiagdolabel ldiagpadd
+ 0 0 fromarrowlength FANG ldiagatangle ldiagpadd /FROM ldiagpointdef
+ FANG /FROM@ANGLE ldiagangledef
+
+ to (CTR) ldiagdolabel TANG to (CIRCUM) ldiagdolabel ldiagpadd
+ 0 0 toarrowlength TANG ldiagatangle ldiagpadd /TO ldiagpointdef
+ TANG 180 dg add /TO@ANGLE ldiagangledef
+
+ /FDIST [ FROM CTR ldiagdistance ] cvx def
+ /TDIST [ TO CTR ldiagdistance ] cvx def
+ /XINDENT [ xindent FDIST ldiagmin ] cvx def
+ /ZINDENT [ zindent TDIST ldiagmin ] cvx def
+ FROM 0 0 XINDENT FANG ldiagatangle ldiagpadd /LFROM ldiagpointdef
+ FROM@ANGLE /LFROM@ANGLE ldiagangledef
+ TO 0 0 ZINDENT TANG ldiagatangle ldiagpadd /LTO ldiagpointdef
+ TO@ANGLE /LTO@ANGLE ldiagangledef
+
+ CTR /LMID ldiagpointdef
+ 0 0 1 ft FANG 180 dg add ldiagatangle
+ 0 0 1 ft TANG 180 dg add ldiagatangle
+ ldiagangleto /LMID@ANGLE ldiagangledef
+
+ FROM LFROM LMID LTO TO
+
+ % (leaving ldiagvhlinepath) 0 ldiagdebugprint
+ % count ( stack size is) 1 ldiagdebugprint pop
+} def
+
+% farr tarr { from } { to } xindent zindent radius ldiagvhcurvepath -
+/ldiagvhcurvepath
+{
+ % (entering ldiagvhcurvepath) 0 ldiagdebugprint
+ % count ( stack size is) 1 ldiagdebugprint pop
+ /radius exch def
+ /zindent exch def
+ /xindent exch def
+ cvlit /to exch def
+ cvlit /from exch def
+ /toarrowlength exch def
+ /fromarrowlength exch def
+
+ /CTR [ from (CTR) ldiagdolabel pop to (CTR) ldiagdolabel exch pop ] cvx def
+ /FANG [ from (CTR) ldiagdolabel CTR ldiagangleto ] cvx def
+ /TANG [ to (CTR) ldiagdolabel CTR ldiagangleto ] cvx def
+
+ from (CTR) ldiagdolabel FANG from (CIRCUM) ldiagdolabel ldiagpadd
+ 0 0 fromarrowlength FANG ldiagatangle ldiagpadd /FROM ldiagpointdef
+ FANG /FROM@ANGLE ldiagangledef
+
+ to (CTR) ldiagdolabel TANG to (CIRCUM) ldiagdolabel ldiagpadd
+ 0 0 toarrowlength TANG ldiagatangle ldiagpadd /TO ldiagpointdef
+ TANG 180 dg add /TO@ANGLE ldiagangledef
+
+ /FDIST [ FROM CTR ldiagdistance ] cvx def
+ /TDIST [ TO CTR ldiagdistance ] cvx def
+ /RADIUS [ radius FDIST TDIST ldiagmin ldiagmin ] cvx def
+ /XINDENT [ xindent FDIST RADIUS sub ldiagmin ] cvx def
+ /ZINDENT [ zindent TDIST RADIUS sub ldiagmin ] cvx def
+
+ FROM 0 0 XINDENT FANG ldiagatangle ldiagpadd /LFROM ldiagpointdef
+ FROM@ANGLE /LFROM@ANGLE ldiagangledef
+ TO 0 0 ZINDENT TANG ldiagatangle ldiagpadd /LTO ldiagpointdef
+ TO@ANGLE /LTO@ANGLE ldiagangledef
+
+ /FCTR [ CTR 0 0 RADIUS FROM@ANGLE 180 dg add ldiagatangle ldiagpadd ] cvx def
+ /TCTR [ CTR 0 0 RADIUS TO@ANGLE ldiagatangle ldiagpadd ] cvx def
+ /XCTR [ CTR 0 0 RADIUS FROM@ANGLE 180 dg add ldiagatangle ldiagpadd
+ 0 0 RADIUS TO@ANGLE ldiagatangle ldiagpadd ] cvx def
+ XCTR 0 0 RADIUS XCTR CTR ldiagangleto ldiagatangle ldiagpadd
+ /LMID ldiagpointdef
+ FCTR TCTR ldiagangleto /LMID@ANGLE ldiagangledef
+
+ FROM LFROM FCTR
+ {[XCTR clockwise]} {} {} {} {} {[XCTR]} {[XCTR clockwise]} {[XCTR]}
+ FCTR TCTR ldiagangleto ldiagquadcase
+ TCTR LTO TO
+
+ % (leaving ldiagvhcurvepath) 0 ldiagdebugprint
+ % count ( stack size is) 1 ldiagdebugprint pop
+} def
+
+% farr tarr { from } { to } xindent zindent ldiaghvlinepath -
+/ldiaghvlinepath
+{
+ % (entering ldiaghvlinepath) 0 ldiagdebugprint
+ % count ( stack size is) 1 ldiagdebugprint pop
+ /zindent exch def
+ /xindent exch def
+ cvlit /to exch def
+ cvlit /from exch def
+ /toarrowlength exch def
+ /fromarrowlength exch def
+
+ /CTR [ to (CTR) ldiagdolabel pop from (CTR) ldiagdolabel exch pop ] cvx def
+ /FANG [ from (CTR) ldiagdolabel CTR ldiagangleto ] cvx def
+ /TANG [ to (CTR) ldiagdolabel CTR ldiagangleto ] cvx def
+
+ from (CTR) ldiagdolabel FANG from (CIRCUM) ldiagdolabel ldiagpadd
+ 0 0 fromarrowlength FANG ldiagatangle ldiagpadd /FROM ldiagpointdef
+ FANG /FROM@ANGLE ldiagangledef
+
+ to (CTR) ldiagdolabel TANG to (CIRCUM) ldiagdolabel ldiagpadd
+ 0 0 toarrowlength TANG ldiagatangle ldiagpadd /TO ldiagpointdef
+ TANG 180 dg add /TO@ANGLE ldiagangledef
+
+ /FDIST [ FROM CTR ldiagdistance ] cvx def
+ /TDIST [ TO CTR ldiagdistance ] cvx def
+ /XINDENT [ xindent FDIST ldiagmin ] cvx def
+ /ZINDENT [ zindent TDIST ldiagmin ] cvx def
+
+ FROM 0 0 XINDENT FANG ldiagatangle ldiagpadd /LFROM ldiagpointdef
+ FROM@ANGLE /LFROM@ANGLE ldiagangledef
+ TO 0 0 ZINDENT TANG ldiagatangle ldiagpadd /LTO ldiagpointdef
+ TO@ANGLE /LTO@ANGLE ldiagangledef
+
+ CTR /LMID ldiagpointdef
+ 0 0 1 ft FANG 180 dg add ldiagatangle
+ 0 0 1 ft TANG 180 dg add ldiagatangle ldiagangleto
+ /LMID@ANGLE ldiagangledef
+
+ FROM LFROM LMID LTO TO
+
+ % (leaving ldiaghvlinepath) 0 ldiagdebugprint
+ % count ( stack size is) 1 ldiagdebugprint pop
+} def
+
+% farr tarr { from } { to } xindent zindent radius ldiaghvcurvepath -
+/ldiaghvcurvepath
+{
+ % (entering ldiaghvcurvepath) 0 ldiagdebugprint
+ % count ( stack size is) 1 ldiagdebugprint pop
+ /radius exch def
+ /zindent exch def
+ /xindent exch def
+ cvlit /to exch def
+ cvlit /from exch def
+ /toarrowlength exch def
+ /fromarrowlength exch def
+
+ /CTR [ to (CTR) ldiagdolabel pop from (CTR) ldiagdolabel exch pop ] cvx def
+ /FANG [ from (CTR) ldiagdolabel CTR ldiagangleto ] cvx def
+ /TANG [ to (CTR) ldiagdolabel CTR ldiagangleto ] cvx def
+
+ from (CTR) ldiagdolabel FANG from (CIRCUM) ldiagdolabel ldiagpadd
+ 0 0 fromarrowlength FANG ldiagatangle ldiagpadd /FROM ldiagpointdef
+ FANG /FROM@ANGLE ldiagangledef
+
+ to (CTR) ldiagdolabel TANG to (CIRCUM) ldiagdolabel ldiagpadd
+ 0 0 toarrowlength TANG ldiagatangle ldiagpadd /TO ldiagpointdef
+ TANG 180 dg add /TO@ANGLE ldiagangledef
+
+ /FDIST [ FROM CTR ldiagdistance ] cvx def
+ /TDIST [ TO CTR ldiagdistance ] cvx def
+ /RADIUS [ radius FDIST TDIST ldiagmin ldiagmin ] cvx def
+ /XINDENT [ xindent FDIST RADIUS sub ldiagmin ] cvx def
+ /ZINDENT [ zindent TDIST RADIUS sub ldiagmin ] cvx def
+ FROM 0 0 XINDENT FANG ldiagatangle ldiagpadd /LFROM ldiagpointdef
+ FROM@ANGLE /LFROM@ANGLE ldiagangledef
+ TO 0 0 ZINDENT TANG ldiagatangle ldiagpadd /LTO ldiagpointdef
+ TO@ANGLE /LTO@ANGLE ldiagangledef
+
+ /FCTR [ CTR 0 0 RADIUS FROM@ANGLE 180 dg add ldiagatangle ldiagpadd ] cvx def
+ /TCTR [ CTR 0 0 RADIUS TO@ANGLE ldiagatangle ldiagpadd ] cvx def
+ /XCTR [ CTR 0 0 RADIUS FROM@ANGLE 180 dg add ldiagatangle ldiagpadd
+ 0 0 RADIUS TO@ANGLE ldiagatangle ldiagpadd ] cvx def
+ XCTR 0 0 RADIUS XCTR CTR ldiagangleto ldiagatangle ldiagpadd
+ /LMID ldiagpointdef
+ FCTR TCTR ldiagangleto /LMID@ANGLE ldiagangledef
+
+ FROM LFROM FCTR
+ {[XCTR]} {} {} {} {} {[XCTR clockwise]} {[XCTR]} {[XCTR clockwise]}
+ FCTR TCTR ldiagangleto ldiagquadcase
+ TCTR LTO TO
+
+ % (leaving ldiaghvcurvepath) 0 ldiagdebugprint
+ % count ( stack size is) 1 ldiagdebugprint pop
+} def
+
+% farr tarr { from } { to } xindent zindent bias ldiaglvrlinepath -
+/ldiaglvrlinepath
+{
+ % (entering ldiaglvrlinepath) 0 ldiagdebugprint
+ % count ( stack size is) 1 ldiagdebugprint pop
+ /bias exch def
+ /zindent exch def
+ /xindent exch def
+ cvlit /to exch def
+ cvlit /from exch def
+ /toarrowlength exch def
+ /fromarrowlength exch def
+
+ from (CTR) ldiagdolabel 180 dg from (CIRCUM) ldiagdolabel ldiagpadd
+ 0 0 fromarrowlength 180 dg ldiagatangle ldiagpadd /FROM ldiagpointdef
+ 180 dg /FROM@ANGLE ldiagangledef
+
+ to (CTR) ldiagdolabel 180 dg to (CIRCUM) ldiagdolabel ldiagpadd
+ 0 0 toarrowlength 180 dg ldiagatangle ldiagpadd /TO ldiagpointdef
+ 0 dg /TO@ANGLE ldiagangledef
+
+ /XLEFT [ FROM pop TO pop ldiagmin bias sub ] cvx def
+ XLEFT FROM exch pop /P1 ldiagpointdef
+ XLEFT TO exch pop /P2 ldiagpointdef
+ /VERT [ P1 P2 ldiagangleto ] cvx def
+ P1 P1 0 0 1 ft 180 dg ldiagatangle ldiagpadd 0 0 1 ft VERT ldiagatangle
+ ldiagpadd ldiagangleto /P1@ANGLE ldiagangledef
+ P2 P2 0 0 1 ft 0 dg ldiagatangle ldiagpadd 0 0 1 ft VERT ldiagatangle
+ ldiagpadd ldiagangleto /P2@ANGLE ldiagangledef
+
+ P1 0.5 ldiagpmul P2 0.5 ldiagpmul ldiagpadd /LMID ldiagpointdef
+ VERT /LMID@ANGLE ldiagangledef
+
+ /XINDENT [ xindent FROM P1 ldiagdistance ldiagmin ] cvx def
+ /ZINDENT [ zindent P2 TO ldiagdistance ldiagmin ] cvx def
+ XINDENT 0 FROM ldiagpsub /LFROM ldiagpointdef
+ 180 dg /LFROM@ANGLE ldiagangledef
+ ZINDENT 0 TO ldiagpsub /LTO ldiagpointdef
+ 0 dg /LTO@ANGLE ldiagangledef
+
+ FROM LFROM P1 LMID P2 LTO TO
+
+ % (leaving ldiaglvrlinepath) 0 ldiagdebugprint
+ % count ( stack size is) 1 ldiagdebugprint pop
+} def
+
+% farr tarr { from } { to } xindent zindent bias radius ldiaglvrcurvepath -
+/ldiaglvrcurvepath
+{
+ % (entering ldiaglvrcurvepath) 0 ldiagdebugprint
+ % count ( stack size is) 1 ldiagdebugprint pop
+ /radius exch def
+ /bias exch def
+ /zindent exch def
+ /xindent exch def
+ cvlit /to exch def
+ cvlit /from exch def
+ /toarrowlength exch def
+ /fromarrowlength exch def
+
+ from (CTR) ldiagdolabel 180 dg from (CIRCUM) ldiagdolabel ldiagpadd 0 0
+ fromarrowlength 180 dg ldiagatangle ldiagpadd /FROM ldiagpointdef
+ 180 dg /FROM@ANGLE ldiagangledef
+ to (CTR) ldiagdolabel 180 dg to (CIRCUM) ldiagdolabel ldiagpadd 0 0
+ toarrowlength 180 dg ldiagatangle ldiagpadd /TO ldiagpointdef
+ 0 dg /TO@ANGLE ldiagangledef
+ /XLEFT [ FROM pop TO pop ldiagmin bias sub ] cvx def
+ /XP1 [ XLEFT FROM exch pop ] cvx def
+ /XP2 [ XLEFT TO exch pop ] cvx def
+ /VERT [ XP1 XP2 ldiagangleto ] cvx def
+ XP1 0.5 ldiagpmul XP2 0.5 ldiagpmul ldiagpadd /LMID ldiagpointdef
+ VERT /LMID@ANGLE ldiagangledef
+ /XINDENT [ xindent FROM XP1 ldiagdistance ldiagmin ] cvx def
+ /ZINDENT [ zindent XP2 TO ldiagdistance ldiagmin ] cvx def
+ XINDENT 0 FROM ldiagpsub /LFROM ldiagpointdef
+ 180 dg /LFROM@ANGLE ldiagangledef
+ ZINDENT 0 TO ldiagpsub /LTO ldiagpointdef
+ 0 dg /LTO@ANGLE ldiagangledef
+ /RADIUS [ radius XP1 XP2 ldiagdistance 2 div ldiagmin ] cvx def
+ /XP1PRE [ XP1 0 0 RADIUS 0 dg ldiagatangle ldiagpadd ] cvx def
+ /XP1POST [ XP1 0 0 RADIUS VERT ldiagatangle ldiagpadd ] cvx def
+ /XP1CTR [ XP1PRE 0 0 RADIUS VERT ldiagatangle ldiagpadd ] cvx def
+ XP1CTR 0 0 RADIUS XP1CTR XP1 ldiagangleto ldiagatangle ldiagpadd
+ /P1 ldiagpointdef
+ XP1PRE XP1POST ldiagangleto /P1@ANGLE ldiagangledef
+ /XP2PRE [ 0 0 RADIUS VERT ldiagatangle XP2 ldiagpsub ] cvx def
+ /XP2POST [ XP2 0 0 RADIUS 0 dg ldiagatangle ldiagpadd ] cvx def
+ /XP2CTR [ XP2PRE 0 0 RADIUS 0 dg ldiagatangle ldiagpadd ] cvx def
+ XP2CTR 0 0 RADIUS XP2CTR XP2 ldiagangleto ldiagatangle ldiagpadd
+ /P2 ldiagpointdef
+ XP2PRE XP2POST ldiagangleto /P2@ANGLE ldiagangledef
+ FROM LFROM XP1PRE
+ { } { [XP1CTR] P1 [XP1CTR] } { } { [XP1CTR clockwise] P1 [XP1CTR clockwise] }
+ { } { } { } { } VERT round ldiagquadcase
+ XP1POST LMID XP2PRE
+ { } { [XP2CTR] P2 [XP2CTR] } { } { [XP2CTR clockwise] P2 [XP2CTR clockwise] }
+ { } { } { } { } VERT round ldiagquadcase
+ XP2POST LTO TO
+
+ % (leaving ldiaglvrcurvepath) 0 ldiagdebugprint
+ % count ( stack size is) 1 ldiagdebugprint pop
+} def
+
+% farr tarr { from } { to } xindent zindent bias ldiagrvllinepath -
+/ldiagrvllinepath
+{
+ % (entering ldiagrvllinepath) 0 ldiagdebugprint
+ % count ( stack size is) 1 ldiagdebugprint pop
+ /bias exch def
+ /zindent exch def
+ /xindent exch def
+ cvlit /to exch def
+ cvlit /from exch def
+ /toarrowlength exch def
+ /fromarrowlength exch def
+
+ from (CTR) ldiagdolabel 0 dg from (CIRCUM) ldiagdolabel ldiagpadd
+ 0 0 fromarrowlength 0 dg ldiagatangle ldiagpadd /FROM ldiagpointdef
+ 0 dg /FROM@ANGLE ldiagangledef
+ to (CTR) ldiagdolabel 0 dg to (CIRCUM) ldiagdolabel ldiagpadd
+ 0 0 toarrowlength 0 dg ldiagatangle ldiagpadd /TO ldiagpointdef
+ 180 dg /TO@ANGLE ldiagangledef
+ /XRIGHT [ FROM pop TO pop ldiagmax bias add ] cvx def
+ XRIGHT FROM exch pop /P1 ldiagpointdef
+ XRIGHT TO exch pop /P2 ldiagpointdef
+ /VERT [ P1 P2 ldiagangleto ] cvx def
+ P1 P1 0 0 1 ft 0 dg ldiagatangle ldiagpadd 0 0 1 ft VERT ldiagatangle
+ ldiagpadd ldiagangleto /P1@ANGLE ldiagangledef
+ P2 P2 0 0 1 ft 180 dg ldiagatangle ldiagpadd 0 0 1 ft VERT ldiagatangle
+ ldiagpadd ldiagangleto /P2@ANGLE ldiagangledef
+ P1 0.5 ldiagpmul P2 0.5 ldiagpmul ldiagpadd /LMID ldiagpointdef
+ VERT /LMID@ANGLE ldiagangledef
+ /XINDENT [ xindent FROM P1 ldiagdistance ldiagmin ] cvx def
+ /ZINDENT [ zindent P2 TO ldiagdistance ldiagmin ] cvx def
+ FROM XINDENT 0 ldiagpadd /LFROM ldiagpointdef
+ 0 dg /LFROM@ANGLE ldiagangledef
+ TO ZINDENT 0 ldiagpadd /LTO ldiagpointdef
+ 180 dg /LTO@ANGLE ldiagangledef
+ FROM LFROM P1 LMID P2 LTO TO
+
+ % (leaving ldiagrvllinepath) 0 ldiagdebugprint
+ % count ( stack size is) 1 ldiagdebugprint pop
+} def
+
+
+% farr tarr { from } { to } xindent zindent bias radius ldiagrvlcurvepath -
+/ldiagrvlcurvepath
+{
+ % (entering ldiagrvlcurvepath) 0 ldiagdebugprint
+ % count ( stack size is) 1 ldiagdebugprint pop
+ /radius exch def
+ /bias exch def
+ /zindent exch def
+ /xindent exch def
+ cvlit /to exch def
+ cvlit /from exch def
+ /toarrowlength exch def
+ /fromarrowlength exch def
+
+ from (CTR) ldiagdolabel 0 dg from (CIRCUM) ldiagdolabel ldiagpadd
+ 0 0 fromarrowlength 0 dg ldiagatangle ldiagpadd /FROM ldiagpointdef
+ 0 dg /FROM@ANGLE ldiagangledef
+ to (CTR) ldiagdolabel 0 dg to (CIRCUM) ldiagdolabel ldiagpadd
+ 0 0 toarrowlength 0 dg ldiagatangle ldiagpadd /TO ldiagpointdef
+ 180 dg /TO@ANGLE ldiagangledef
+ /XRIGHT [ FROM pop TO pop ldiagmax bias add ] cvx def
+ /XP1 [ XRIGHT FROM exch pop ] cvx def
+ /XP2 [ XRIGHT TO exch pop ] cvx def
+ /VERT [ XP1 XP2 ldiagangleto ] cvx def
+ XP1 0.5 ldiagpmul XP2 0.5 ldiagpmul ldiagpadd /LMID ldiagpointdef
+ VERT /LMID@ANGLE ldiagangledef
+ /XINDENT [ xindent FROM XP1 ldiagdistance ldiagmin ] cvx def
+ /ZINDENT [ zindent XP2 TO ldiagdistance ldiagmin ] cvx def
+ FROM XINDENT 0 ldiagpadd /LFROM ldiagpointdef
+ 0 dg /LFROM@ANGLE ldiagangledef
+ TO ZINDENT 0 ldiagpadd /LTO ldiagpointdef
+ 180 dg /LTO@ANGLE ldiagangledef
+ /RADIUS [ radius XP1 XP2 ldiagdistance 0.5 mul ldiagmin ] cvx def
+ /XP1PRE [ XP1 0 0 RADIUS 180 dg ldiagatangle ldiagpadd ] cvx def
+ /XP1POST [ XP1 0 0 RADIUS VERT ldiagatangle ldiagpadd ] cvx def
+ /XP1CTR [ XP1PRE 0 0 RADIUS VERT ldiagatangle ldiagpadd ] cvx def
+ XP1CTR 0 0 RADIUS XP1CTR XP1 ldiagangleto ldiagatangle ldiagpadd
+ /P1 ldiagpointdef
+ XP1PRE XP1POST ldiagangleto /P1@ANGLE ldiagangledef
+ /XP2PRE [ 0 0 RADIUS VERT ldiagatangle XP2 ldiagpsub ] cvx def
+ /XP2POST [ XP2 0 0 RADIUS 180 dg ldiagatangle ldiagpadd ] cvx def
+ /XP2CTR [ XP2PRE 0 0 RADIUS 180 dg ldiagatangle ldiagpadd ] cvx def
+ XP2CTR 0 0 RADIUS XP2CTR XP2 ldiagangleto ldiagatangle ldiagpadd
+ /P2 ldiagpointdef
+ XP2PRE XP2POST ldiagangleto /P2@ANGLE ldiagangledef
+ FROM LFROM XP1PRE
+ {} {[XP1CTR clockwise] P1 [XP1CTR clockwise]} {} {[XP1CTR] P1 [XP1CTR]}
+ {} {} {} {} VERT round ldiagquadcase
+ XP1POST LMID XP2PRE
+ {} {[XP2CTR clockwise] P2 [XP2CTR clockwise]} {} {[XP2CTR] P2 [XP2CTR]}
+ {} {} {} {} VERT round ldiagquadcase
+ XP2POST LTO TO
+
+ % (leaving ldiagrvlcurvepath) 0 ldiagdebugprint
+ % count ( stack size is) 1 ldiagdebugprint pop
+} def
+
+% farr tarr { from } { to } xindent zindent bias fbias tbias ldiagdwraplinepath -
+/ldiagdwraplinepath
+{
+ % (entering ldiagdwraplinepath) 0 ldiagdebugprint
+ % count ( stack size is) 1 ldiagdebugprint pop
+ /tbias exch def
+ /fbias exch def
+ /bias exch def
+ /zindent exch def
+ /xindent exch def
+ cvlit /to exch def
+ cvlit /from exch def
+ /toarrowlength exch def
+ /fromarrowlength exch def
+
+ /DIRN [ from (CTR) ldiagdolabel pop to (CTR) ldiagdolabel pop
+ lt { 180 dg } { 0 dg } ifelse ] cvx def
+ from (CTR) ldiagdolabel DIRN from (CIRCUM) ldiagdolabel ldiagpadd 0 0
+ fromarrowlength DIRN ldiagatangle ldiagpadd /FROM ldiagpointdef
+ DIRN /FROM@ANGLE ldiagangledef
+ to (CTR) ldiagdolabel DIRN 180 dg add to (CIRCUM) ldiagdolabel ldiagpadd
+ 0 0 toarrowlength DIRN 180 dg add ldiagatangle ldiagpadd /TO ldiagpointdef
+ DIRN /TO@ANGLE ldiagangledef
+ FROM 0 0 fbias 0 ldiagmax DIRN ldiagatangle ldiagpadd /P1 ldiagpointdef
+ DIRN 180 dg eq { 225 dg } { -45 dg } ifelse /P1@ANGLE ldiagangledef
+ TO 0 0 tbias 0 ldiagmax DIRN 180 dg add ldiagatangle ldiagpadd
+ /P4 ldiagpointdef
+ DIRN 180 dg eq { 135 dg } { 45 dg } ifelse /P4@ANGLE ldiagangledef
+ /YC [ from (CTR) ldiagdolabel 270 dg from (CIRCUM) ldiagdolabel ldiagpadd
+ exch pop to (CTR) ldiagdolabel 270 dg to (CIRCUM) ldiagdolabel ldiagpadd
+ exch pop ldiagmin bias 0 ldiagmax sub ] cvx def
+ P1 pop YC /P2 ldiagpointdef
+ P4@ANGLE 180 dg sub /P2@ANGLE ldiagangledef
+ P4 pop YC /P3 ldiagpointdef
+ P1@ANGLE 180 dg sub /P3@ANGLE ldiagangledef
+ /XINDENT [ xindent FROM P1 ldiagdistance ldiagmin ] cvx def
+ FROM 0 0 XINDENT DIRN ldiagatangle ldiagpadd /LFROM ldiagpointdef
+ FROM@ANGLE /LFROM@ANGLE ldiagangledef
+ /ZINDENT [ zindent TO P4 ldiagdistance ldiagmin ] cvx def
+ TO 0 0 ZINDENT DIRN 180 dg add ldiagatangle ldiagpadd /LTO ldiagpointdef
+ TO@ANGLE /LTO@ANGLE ldiagangledef
+ P2 0.5 ldiagpmul P3 0.5 ldiagpmul ldiagpadd /LMID ldiagpointdef
+ DIRN 180 dg sub /LMID@ANGLE ldiagangledef
+ FROM P1 P2 P3 P4 TO
+
+ % (leaving ldiagdwraplinepath) 0 ldiagdebugprint
+ % count ( stack size is) 1 ldiagdebugprint pop
+} def
+
+% farr tarr { from } { to } xindent zindent bias fbias tbias radius
+% ldiagdwrapcurvepath -
+/ldiagdwrapcurvepath
+{
+ % (entering ldiagdwrapcurvepath) 0 ldiagdebugprint
+ % count ( stack size is) 1 ldiagdebugprint pop
+ /radius exch def
+ /tbias exch def
+ /fbias exch def
+ /bias exch def
+ /zindent exch def
+ /xindent exch def
+ cvlit /to exch def
+ cvlit /from exch def
+ /toarrowlength exch def
+ /fromarrowlength exch def
+
+ /DIRN [ from (CTR) ldiagdolabel pop to (CTR) ldiagdolabel pop lt
+ { 180 dg } { 0 dg } ifelse ] cvx def
+ /CLOCK [ from (CTR) ldiagdolabel pop to (CTR) ldiagdolabel pop lt
+ { anticlockwise } { clockwise } ifelse ] cvx def
+ from (CTR) ldiagdolabel DIRN from (CIRCUM) ldiagdolabel ldiagpadd
+ 0 0 fromarrowlength DIRN ldiagatangle ldiagpadd /FROM ldiagpointdef
+ DIRN /FROM@ANGLE ldiagangledef
+ to (CTR) ldiagdolabel DIRN 180 dg add to (CIRCUM) ldiagdolabel ldiagpadd
+ 0 0 toarrowlength DIRN 180 dg add ldiagatangle ldiagpadd /TO ldiagpointdef
+ DIRN /TO@ANGLE ldiagangledef
+ /XP1 [ FROM 0 0 fbias 0 ldiagmax DIRN ldiagatangle ldiagpadd ] cvx def
+ /XP4 [ TO 0 0 tbias 0 ldiagmax DIRN 180 dg add ldiagatangle ldiagpadd ] cvx def
+ /YC [ from (CTR) ldiagdolabel 270 dg from (CIRCUM) ldiagdolabel ldiagpadd
+ exch pop to (CTR) ldiagdolabel 270 dg to (CIRCUM) ldiagdolabel ldiagpadd
+ exch pop ldiagmin bias 0 ldiagmax sub ] cvx def
+ /XP2 [ XP1 pop YC ] cvx def
+ /XP3 [ XP4 pop YC ] cvx def
+ /RP1 [ radius XP1 FROM ldiagdistance XP1 XP2 ldiagdistance 2 div
+ ldiagmin ldiagmin ] cvx def
+ /XP1PRE [ XP1 0 0 RP1 XP1 FROM ldiagangleto ldiagatangle ldiagpadd ] cvx def
+ /XP1POST [ XP1 0 0 RP1 XP1 XP2 ldiagangleto ldiagatangle ldiagpadd ] cvx def
+ /XP1CTR [ XP1PRE 0 0 RP1 XP1 XP2 ldiagangleto ldiagatangle ldiagpadd ] cvx def
+ XP1CTR 0 0 RP1 XP1CTR XP1 ldiagangleto ldiagatangle ldiagpadd /P1 ldiagpointdef
+ XP1CTR P1 ldiagangleto DIRN add 90 dg sub /P1@ANGLE ldiagangledef
+ /RP2 [ radius XP1 XP2 ldiagdistance 2 div XP2 XP3 ldiagdistance 2 div
+ ldiagmin ldiagmin ] cvx def
+ /XP2PRE [ XP2 0 0 RP2 XP2 XP1 ldiagangleto ldiagatangle ldiagpadd ] cvx def
+ /XP2POST [ XP2 0 0 RP2 XP2 XP3 ldiagangleto ldiagatangle ldiagpadd ] cvx def
+ /XP2CTR [ XP2PRE 0 0 RP2 XP2 XP3 ldiagangleto ldiagatangle ldiagpadd ] cvx def
+ XP2CTR 0 0 RP2 XP2CTR XP2 ldiagangleto ldiagatangle ldiagpadd /P2 ldiagpointdef
+ XP2CTR P2 ldiagangleto DIRN add 90 dg sub /P2@ANGLE ldiagangledef
+ /RP3 [ radius XP2 XP3 ldiagdistance 2 div XP3 XP4 ldiagdistance 2 div
+ ldiagmin ldiagmin ] cvx def
+ /XP3PRE [ XP3 0 0 RP3 XP3 XP2 ldiagangleto ldiagatangle ldiagpadd ] cvx def
+ /XP3POST [ XP3 0 0 RP3 XP3 XP4 ldiagangleto ldiagatangle ldiagpadd ] cvx def
+ /XP3CTR [ XP3PRE 0 0 RP3 XP3 XP4 ldiagangleto ldiagatangle ldiagpadd ] cvx def
+ XP3CTR 0 0 RP3 XP3CTR XP3 ldiagangleto ldiagatangle ldiagpadd /P3 ldiagpointdef
+ XP3CTR P3 ldiagangleto DIRN add 90 dg sub /P3@ANGLE ldiagangledef
+ /RP4 [ radius XP4 XP3 ldiagdistance 2 div XP4 TO ldiagdistance
+ ldiagmin ldiagmin ] cvx def
+ /XP4PRE [ XP4 0 0 RP4 XP4 XP3 ldiagangleto ldiagatangle ldiagpadd ] cvx def
+ /XP4POST [ XP4 0 0 RP4 XP4 TO ldiagangleto ldiagatangle ldiagpadd ] cvx def
+ /XP4CTR [ XP4PRE 0 0 RP4 XP4 TO ldiagangleto ldiagatangle ldiagpadd ] cvx def
+ XP4CTR 0 0 RP4 XP4CTR XP4 ldiagangleto ldiagatangle ldiagpadd /P4 ldiagpointdef
+ XP4CTR P4 ldiagangleto DIRN add 90 dg sub /P4@ANGLE ldiagangledef
+ /XINDENT [ xindent FROM XP1PRE ldiagdistance ldiagmin ] cvx def
+ FROM 0 0 XINDENT DIRN ldiagatangle ldiagpadd /LFROM ldiagpointdef
+ FROM@ANGLE /LFROM@ANGLE ldiagangledef
+ XP2 0.5 ldiagpmul XP3 0.5 ldiagpmul ldiagpadd /LMID ldiagpointdef
+ DIRN 180 dg sub /LMID@ANGLE ldiagangledef
+ /ZINDENT [ zindent TO XP4POST ldiagdistance ldiagmin ] cvx def
+ TO 0 0 ZINDENT DIRN 180 dg add ldiagatangle ldiagpadd /LTO ldiagpointdef
+ TO@ANGLE /LTO@ANGLE ldiagangledef
+ FROM LFROM
+ XP1PRE [XP1CTR CLOCK] XP1POST
+ XP2PRE [XP2CTR CLOCK] XP2POST
+ LMID
+ XP3PRE [XP3CTR CLOCK] XP3POST
+ XP4PRE [XP4CTR CLOCK] XP4POST
+ LTO TO
+
+ % (leaving ldiagdwrapcurvepath) 0 ldiagdebugprint
+ % count ( stack size is) 1 ldiagdebugprint pop
+} def
+
+% farr tarr { from } { to } xindent zindent bias fbias tbias ldiaguwraplinepath -
+/ldiaguwraplinepath
+{
+ % (entering ldiaguwraplinepath) 0 ldiagdebugprint
+ % count ( stack size is) 1 ldiagdebugprint pop
+ /tbias exch def
+ /fbias exch def
+ /bias exch def
+ /zindent exch def
+ /xindent exch def
+ cvlit /to exch def
+ cvlit /from exch def
+ /toarrowlength exch def
+ /fromarrowlength exch def
+
+ /DIRN [ from (CTR) ldiagdolabel pop to (CTR) ldiagdolabel pop lt
+ { 180 dg } { 0 dg } ifelse ] cvx def
+ from (CTR) ldiagdolabel DIRN from (CIRCUM) ldiagdolabel ldiagpadd
+ 0 0 fromarrowlength DIRN ldiagatangle ldiagpadd /FROM ldiagpointdef
+ DIRN /FROM@ANGLE ldiagangledef
+ to (CTR) ldiagdolabel DIRN 180 dg add to (CIRCUM) ldiagdolabel ldiagpadd
+ 0 0 toarrowlength DIRN 180 dg add ldiagatangle ldiagpadd /TO ldiagpointdef
+ DIRN /TO@ANGLE ldiagangledef
+ FROM 0 0 fbias 0 ldiagmax DIRN ldiagatangle ldiagpadd /P1 ldiagpointdef
+ DIRN 180 dg eq { 135 dg } { 45 dg } ifelse /P1@ANGLE ldiagangledef
+ TO 0 0 tbias 0 ldiagmax DIRN 180 dg add ldiagatangle ldiagpadd
+ /P4 ldiagpointdef
+ DIRN 180 dg eq { 225 dg } { -45 dg } ifelse /P4@ANGLE ldiagangledef
+ /YC [ from (CTR) ldiagdolabel 90 dg from (CIRCUM) ldiagdolabel ldiagpadd
+ exch pop to (CTR) ldiagdolabel 90 dg to (CIRCUM) ldiagdolabel ldiagpadd
+ exch pop ldiagmax bias 0 ldiagmax add ] cvx def
+ P1 pop YC /P2 ldiagpointdef
+ P4@ANGLE 180 dg sub /P2@ANGLE ldiagangledef
+ P4 pop YC /P3 ldiagpointdef
+ P1@ANGLE 180 dg sub /P3@ANGLE ldiagangledef
+ /XINDENT [ xindent FROM P1 ldiagdistance ldiagmin ] cvx def
+ FROM 0 0 XINDENT DIRN ldiagatangle ldiagpadd /LFROM ldiagpointdef
+ FROM@ANGLE /LFROM@ANGLE ldiagangledef
+ /ZINDENT [ zindent TO P4 ldiagdistance ldiagmin ] cvx def
+ TO 0 0 ZINDENT DIRN 180 dg add ldiagatangle ldiagpadd /LTO ldiagpointdef
+ TO@ANGLE /LTO@ANGLE ldiagangledef
+ P2 0.5 ldiagpmul P3 0.5 ldiagpmul ldiagpadd /LMID ldiagpointdef
+ DIRN 180 dg sub /LMID@ANGLE ldiagangledef
+ FROM P1 P2 P3 P4 TO
+
+ % (leaving ldiaguwraplinepath) 0 ldiagdebugprint
+ % count ( stack size is) 1 ldiagdebugprint pop
+} def
+
+% farr tarr { from } { to } xindent zindent bias fbias tbias radius
+% ldiaguwrapcurvepath -
+/ldiaguwrapcurvepath
+{
+ % (entering ldiaguwrapcurvepath) 0 ldiagdebugprint
+ % count ( stack size is) 1 ldiagdebugprint pop
+ /radius exch def
+ /tbias exch def
+ /fbias exch def
+ /bias exch def
+ /zindent exch def
+ /xindent exch def
+ cvlit /to exch def
+ cvlit /from exch def
+ /toarrowlength exch def
+ /fromarrowlength exch def
+
+ /DIRN [ from (CTR) ldiagdolabel pop to (CTR) ldiagdolabel pop lt
+ { 180 dg } { 0 dg } ifelse ] cvx def
+ /CLOCK [ from (CTR) ldiagdolabel pop to (CTR) ldiagdolabel pop lt
+ { clockwise } { anticlockwise } ifelse ] cvx def
+ from (CTR) ldiagdolabel DIRN from (CIRCUM) ldiagdolabel ldiagpadd
+ 0 0 fromarrowlength DIRN ldiagatangle ldiagpadd /FROM ldiagpointdef
+ DIRN /FROM@ANGLE ldiagangledef
+ to (CTR) ldiagdolabel DIRN 180 dg add to (CIRCUM) ldiagdolabel ldiagpadd
+ 0 0 toarrowlength DIRN 180 dg add ldiagatangle ldiagpadd /TO ldiagpointdef
+ DIRN /TO@ANGLE ldiagangledef
+ /XP1 [ FROM 0 0 fbias 0 ldiagmax DIRN ldiagatangle ldiagpadd ] cvx def
+ /XP4 [ TO 0 0 tbias 0 ldiagmax DIRN 180 dg add ldiagatangle ldiagpadd ] cvx def
+ /YC [ from (CTR) ldiagdolabel 90 dg from (CIRCUM) ldiagdolabel ldiagpadd
+ exch pop to (CTR) ldiagdolabel 90 dg to (CIRCUM) ldiagdolabel ldiagpadd
+ exch pop ldiagmax bias 0 ldiagmax add ] cvx def
+ /XP2 [ XP1 pop YC ] cvx def
+ /XP3 [ XP4 pop YC ] cvx def
+ /RP1 [ radius XP1 FROM ldiagdistance XP1 XP2 ldiagdistance 2 div
+ ldiagmin ldiagmin ] cvx def
+ /XP1PRE [ XP1 0 0 RP1 XP1 FROM ldiagangleto ldiagatangle ldiagpadd ] cvx def
+ /XP1POST [ XP1 0 0 RP1 XP1 XP2 ldiagangleto ldiagatangle ldiagpadd ] cvx def
+ /XP1CTR [ XP1PRE 0 0 RP1 XP1 XP2 ldiagangleto ldiagatangle ldiagpadd ] cvx def
+ XP1CTR 0 0 RP1 XP1CTR XP1 ldiagangleto ldiagatangle ldiagpadd /P1 ldiagpointdef
+ XP1CTR P1 ldiagangleto DIRN add 90 dg add /P1@ANGLE ldiagangledef
+ /RP2 [ radius XP1 XP2 ldiagdistance 2 div XP2 XP3 ldiagdistance 2 div
+ ldiagmin ldiagmin ] cvx def
+ /XP2PRE [ XP2 0 0 RP2 XP2 XP1 ldiagangleto ldiagatangle ldiagpadd ] cvx def
+ /XP2POST [ XP2 0 0 RP2 XP2 XP3 ldiagangleto ldiagatangle ldiagpadd ] cvx def
+ /XP2CTR [ XP2PRE 0 0 RP2 XP2 XP3 ldiagangleto ldiagatangle ldiagpadd ] cvx def
+ XP2CTR 0 0 RP2 XP2CTR XP2 ldiagangleto ldiagatangle ldiagpadd /P2 ldiagpointdef
+ XP2CTR P2 ldiagangleto DIRN add 90 dg add /P2@ANGLE ldiagangledef
+ /RP3 [ radius XP2 XP3 ldiagdistance 2 div XP3 XP4 ldiagdistance 2 div
+ ldiagmin ldiagmin ] cvx def
+ /XP3PRE [ XP3 0 0 RP3 XP3 XP2 ldiagangleto ldiagatangle ldiagpadd ] cvx def
+ /XP3POST [ XP3 0 0 RP3 XP3 XP4 ldiagangleto ldiagatangle ldiagpadd ] cvx def
+ /XP3CTR [ XP3PRE 0 0 RP3 XP3 XP4 ldiagangleto ldiagatangle ldiagpadd ] cvx def
+ XP3CTR 0 0 RP3 XP3CTR XP3 ldiagangleto ldiagatangle ldiagpadd /P3 ldiagpointdef
+ XP3CTR P3 ldiagangleto DIRN add 90 dg add /P3@ANGLE ldiagangledef
+ /RP4 [ radius XP4 XP3 ldiagdistance 2 div XP4 TO ldiagdistance
+ ldiagmin ldiagmin ] cvx def
+ /XP4PRE [ XP4 0 0 RP4 XP4 XP3 ldiagangleto ldiagatangle ldiagpadd ] cvx def
+ /XP4POST [ XP4 0 0 RP4 XP4 TO ldiagangleto ldiagatangle ldiagpadd ] cvx def
+ /XP4CTR [ XP4PRE 0 0 RP4 XP4 TO ldiagangleto ldiagatangle ldiagpadd ] cvx def
+ XP4CTR 0 0 RP4 XP4CTR XP4 ldiagangleto ldiagatangle ldiagpadd /P4 ldiagpointdef
+ XP4CTR P4 ldiagangleto DIRN add 90 dg add /P4@ANGLE ldiagangledef
+ /XINDENT [ xindent FROM XP1PRE ldiagdistance ldiagmin ] cvx def
+ FROM 0 0 XINDENT DIRN ldiagatangle ldiagpadd /LFROM ldiagpointdef
+ FROM@ANGLE /LFROM@ANGLE ldiagangledef
+ XP2 0.5 ldiagpmul XP3 0.5 ldiagpmul ldiagpadd /LMID ldiagpointdef
+ DIRN 180 dg sub /LMID@ANGLE ldiagangledef
+ /ZINDENT [ zindent TO XP4POST ldiagdistance ldiagmin ] cvx def
+ TO 0 0 ZINDENT DIRN 180 dg add ldiagatangle ldiagpadd /LTO ldiagpointdef
+ TO@ANGLE /LTO@ANGLE ldiagangledef
+ FROM LFROM
+ XP1PRE [XP1CTR CLOCK] XP1POST
+ XP2PRE [XP2CTR CLOCK] XP2POST
+ LMID
+ XP3PRE [XP3CTR CLOCK] XP3POST
+ XP4PRE [XP4CTR CLOCK] XP4POST
+ LTO TO
+
+ % (leaving ldiaguwrapcurvepath) 0 ldiagdebugprint
+ % count ( stack size is) 1 ldiagdebugprint pop
+} def
+
+% shape and labels of the @SolidArrowHead symbol
+% - ldiagsolidarrowhead -
+/ldiagsolidarrowhead
+{
+ 0 0 xsize ysize 0.5 mul 0 ysize
+} def
+
+% shape and labels of the @OpenArrowHead symbol
+% <pathwidth> ldiagopenarrowhead -
+/ldiagopenarrowhead
+{
+ /pathwidth exch def
+ /PSW [ 0 0 ] cvx def
+ /PNW [ 0 ysize ] cvx def
+ /PE [ xsize ysize 0.5 mul ] cvx def
+ /REL [ 0 0 pathwidth PE PNW ldiagangleto 90 add ldiagatangle ] cvx def
+ /PNA [ 0 ysize 0.5 mul pathwidth 0.5 mul add ] cvx def
+ /PSA [ 0 ysize 0.5 mul pathwidth 0.5 mul sub ] cvx def
+ /PNI [ PNA PNA xsize 0 ldiagpadd PNW REL ldiagpadd
+ PE REL ldiagpadd ldiaglineintersect ] cvx def
+ /PSI [ 0 pathwidth PNI ldiagpsub ] cvx def
+
+ PSW PE PNW PNI PNA PSA PSI PSW
+} def
+
+% shape and labels of the @HalfOpenArrowHead symbol
+% <pathwidth> ldiaghalfopenarrowhead -
+/ldiaghalfopenarrowhead
+{
+ /pathwidth exch def
+ 0 0
+ xsize ysize 0.5 mul
+ 0 ysize
+ xsize 0.3 mul ysize 0.5 mul pathwidth 0.5 mul add
+ 0 ysize 0.5 mul pathwidth 0.5 mul add
+ 0 ysize 0.5 mul pathwidth 0.5 mul sub
+ xsize 0.3 mul ysize 0.5 mul pathwidth 0.5 mul sub
+ 0 0
+} def
+
+% shape and labels of the @SolidCurvedArrowHead symbol
+% - ldiagsolidcurvedarrowhead -
+/ldiagsolidcurvedarrowhead
+{
+ 0 0
+ [0 0 xsize ysize 0.5 mul ldiaglinebetween
+ xsize 0 xsize ysize ldiaglineintersect clockwise]
+ xsize ysize 0.5 mul
+ [xsize ysize 0.5 mul 0 ysize ldiaglinebetween
+ xsize 0 xsize ysize ldiaglineintersect clockwise]
+ 0 ysize
+} def
+
+% shape and labels of the @OpenCurvedArrowHead symbol
+% <pathwidth> ldiagopencurvedarrowhead -
+/ldiagopencurvedarrowhead
+{
+ /pathwidth exch def
+ /LR [ 0 0 xsize ysize 0.5 mul ldiaglinebetween
+ xsize 0 xsize ysize ldiaglineintersect
+ ] cvx def
+ /UR [ xsize ysize 0.5 mul 0 ysize ldiaglinebetween
+ xsize 0 xsize ysize ldiaglineintersect
+ ] cvx def
+ /PW2 [ pathwidth 0.5 mul ] cvx def
+ /UMID [
+ 0 ysize 0.5 mul PW2 add
+ xsize ysize 0.5 mul PW2 add
+ 0 ysize 0 0 1 ft UR 0 ysize ldiagangleto 90 add ldiagatangle
+ ldiagpadd 0 ysize ldiaglineintersect
+ ] cvx def
+ /LMID [ 0 pathwidth UMID ldiagpsub ] cvx def
+ 0 0
+ [LR clockwise]
+ xsize ysize 0.5 mul
+ [UR clockwise]
+ 0 ysize
+ UMID
+ 0 ysize 0.5 mul PW2 add
+ 0 ysize 0.5 mul PW2 sub
+ LMID
+ 0 0
+} def
+
+% shape and labels of the @HalfOpenCurvedArrowHead symbol
+% <pathwidth> ldiaghalfopencurvedarrowhead -
+/ldiaghalfopencurvedarrowhead
+{
+ /pathwidth exch def
+ /LR [ 0 0 xsize ysize 0.5 mul ldiaglinebetween
+ xsize 0 xsize ysize ldiaglineintersect
+ ] cvx def
+ /UR [ xsize ysize 0.5 mul 0 ysize ldiaglinebetween
+ xsize 0 xsize ysize ldiaglineintersect
+ ] cvx def
+ /BR [ 0 0 LR 0 ysize UR ldiaglineintersect ] cvx def
+ /BRAD [ 0 0 BR ldiagdistance ] cvx def
+ /PW2 [ pathwidth 0.5 mul ] cvx def
+ /XDIST [ BRAD dup mul PW2 dup mul sub sqrt ] cvx def
+ /UMID [ BR XDIST PW2 ldiagpadd ] cvx def
+ /LMID [ BR XDIST 0 PW2 sub ldiagpadd ] cvx def
+ 0 0
+ [LR clockwise]
+ xsize ysize 0.5 mul
+ [UR clockwise]
+ 0 ysize
+ [BR clockwise]
+ UMID
+ 0 ysize 0.5 mul PW2 add
+ 0 ysize 0.5 mul PW2 sub
+ LMID
+ [BR clockwise]
+ 0 0
+} def
+
+end
+%%EndResource
+
+%%BeginResource: procset LoutBasicSetup
+% @PrependGraphic file /export/home/6monthspace/jeff/lout.lib/include/bsf.lpg
+
+% width height linethickness louteuro -
+% draw a Euro symbol of this width and height with this line thickness
+/louteuro {
+ 20 dict begin
+ /eurothick exch def
+ /euroheight exch def
+ /eurowidth exch def
+ /eurostrokewidth euroheight 0.8 mul def
+ /eurostep eurothick 60 cos mul 60 sin div def
+ /eurotheta 40 def
+
+ % llx lly width thickness louteurobox -
+ % draw angled box starting at (llx, lly) with given width and thickness
+ /louteurobox
+ {
+ /euroboxthick exch def
+ /euroboxwidth exch def
+ newpath moveto euroboxwidth 0 rlineto
+ eurostep euroboxthick rlineto
+ euroboxwidth neg 0 rlineto closepath fill
+ } def
+
+ % lower cross stroke
+ 0 euroheight 2 div eurothick 1.5 mul sub
+ eurostrokewidth eurothick louteurobox
+
+ % upper cross stroke
+ 0 euroheight 2 div eurothick 0.5 mul add
+ eurostrokewidth eurostep 2 mul add eurothick louteurobox
+
+ % circular part
+ /eurohctr eurowidth euroheight 2 div eurotheta cos mul sub def
+ /eurovctr euroheight 2 div def
+ newpath
+ eurohctr eurovctr eurovctr eurotheta 350 eurotheta sub arc
+ eurohctr eurovctr eurovctr eurothick sub 365 eurotheta sub eurotheta arcn
+ closepath fill
+ end
+} def
+
+% path for @FullWidthRule symbol
+/LoutRule
+{ 0 0 moveto xsize 0 lineto
+} def
+
+% path for @Box symbol
+/LoutBox
+{ 0 0 moveto xsize 0 lineto
+ xsize ysize lineto 0 ysize lineto
+ closepath
+} def
+
+% path for @CurveBox symbol
+/LoutCurveBox
+{ xmark 0 moveto
+ xsize xmark sub xmark xmark 270 360 arc
+ xsize xmark sub ysize xmark sub xmark 0 90 arc
+ xmark ysize xmark sub xmark 90 180 arc
+ xmark xmark xmark 180 270 arc
+ closepath
+} def
+
+% path for @ShadowBox symbol
+/LoutShadowBox
+{ xmark 2 mul 0 moveto xsize 0 lineto
+ xsize ysize xmark 2 mul sub lineto
+ xsize xmark sub ysize xmark 2 mul sub lineto
+ xsize xmark sub xmark lineto
+ xmark 2 mul xmark lineto
+ closepath
+} def
+
+% set up dictionary containing margin note data: parity LoutMargSet -
+/LoutMargSet
+{ /LoutMargDict 12 dict def
+ LoutMargDict begin
+ /parity exch def
+ /matr matrix currentmatrix def
+ /rightx xsize def
+ /lefty ysize def % highest allowable point for top of next left note
+ /righty ysize def % highest allowable point for top of next right note
+ /max { 2 copy gt { pop } { exch pop } ifelse } def
+ /min { 2 copy lt { pop } { exch pop } ifelse } def
+ end
+} def
+
+%translate coordinate system for marginal notes: type LoutMargShift -
+% where type 0 is left margin, 1 is right margin, 2 is outer, 3 is inner
+/LoutMargShift
+{ LoutMargDict begin
+
+ % y coordinate of top of note, in margin coords, before vertical adjust
+ 0 ysize transform matr itransform exch pop
+
+ % decide whether left or right margin based on type and parity
+ exch [ 0 1 parity 1 parity sub ] exch get 0 eq
+ {
+ % left margin: adjust top of note downwards if overlaps previous note
+ lefty min
+
+ % bottom of note is new lefty position and also translate position
+ ysize sub dup /lefty exch def
+
+ % want right edge of note at coordinate zero
+ xsize neg exch
+ }
+ {
+ % right margin: adjust top of note downwards if overlaps previous note
+ righty min
+
+ % bottom of note is new righty position and also translate position
+ ysize sub dup /righty exch def
+
+ % want left edge of note at coordinate rightx
+ rightx exch
+ } ifelse
+
+ % stack now contains coord of bottom left corner in margin coordinates
+ matr setmatrix translate
+ end
+} def
+
+% create LoutPageDict with left, right, foot, top for @Place symbol users
+/LoutPageSet
+{
+ /LoutPageDict 5 dict def
+ LoutPageDict begin
+ /matr matrix currentmatrix def
+ /left 0 def
+ /right xsize def
+ /foot 0 def
+ /top ysize def
+ end
+
+} def
+
+%%EndResource
+
+%%EndProlog
+
+%%BeginSetup
+%%IncludeResource: font Times-Roman
+/Times-Romanfnt82 vec2 /Times-Roman LoutRecode
+/fnt82 { /Times-Romanfnt82 LoutFont } def
+%%IncludeResource: font Helvetica
+/Helveticafnt35 vec2 /Helvetica LoutRecode
+/fnt35 { /Helveticafnt35 LoutFont } def
+%%IncludeResource: font Symbol
+/fnt78 { /Symbol LoutFont } def
+%%EndSetup
+
+%%Page: 11 1
+%%BeginPageSetup
+%%PageResources: font Times-Roman
+%%+ font Times-Italic
+%%+ font Times-Bold
+%%+ font Helvetica
+/pgsave save def
+%%IncludeResource: font Times-Italic
+/Times-Italicfnt83 vec2 /Times-Italic LoutRecode
+/fnt83 { /Times-Italicfnt83 LoutFont } def
+%%IncludeResource: font Times-Bold
+/Times-Boldfnt84 vec2 /Times-Bold LoutRecode
+/fnt84 { /Times-Boldfnt84 LoutFont } def
+0.0500 dup scale 10 setlinewidth
+%%EndPageSetup
+gsave
+0 0 translate
+240 fnt82 0.0 0.0 0.0 setrgbcolor 11900 16840 0 16840 240 288 60 LoutGraphic
+gsave
+LoutPageSet
+grestore
+gsave
+0 16840 translate
+0.0000 rotate
+9066 14006 0 14006 240 288 60 1417 -15423 LoutGr2
+1 LoutMargSet
+grestore
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diff --git a/doc/user/vprg b/doc/user/vprg
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