9 February, 1995
The "Gofig" PostScript for Printing Go Diagrams
Fred Hansen
Copyright 1995, Carnegie Mellon University
The Postscript below includes definition of the "gofig" dictionary.
This document describes teh capabilities of that dictionary. In
practice, C++ code generates the other lines of PostScript needed to
Establish the coordinate system.
Draw the coordinates (1...19 and A...T), if desired.
Draw grid lines and edge lines.
Call the hoshi and stone functions listed below, as appropriate.
These are the functions provided:
x
x
x
x
x
x
y
y
y
y
y
y
wst
Draw a white stone
bst
Draw a black stone
note wstn
White stone with a note
note bstn
Black ditto
note spotn
Empty spot with a note
hoshi Draw a hoshi point
Where 'x' and 'y' are coordinates of a board intersection. They range
from 0 to n-1, where n is the number of lines. (There may be different
numbers of lines in each direction. The routines don't know and don't
care.) The origin is at the upper left, unlike PostScript where it is at
the lower left.
And where 'note' is a string. As usual in PostScript, strings are
delimited at start and end with '(' and ')' respectively. Some strings
are treated specially:
(%)
(+)
(#)
(@)
(^)
(-)
draw
draw
draw
draw
draw
draw
a diagonal cross
an orthogonal cross
a square
a circle
a triangle
a dash
The gofig dictionary defines a number of parameters that could be
adjusted. Here are their definitions in PostScript notation. The units
of parameters are given as D for dimension and C for color. All
dimensions are specified with 1.0 meaning the distance between rows or
columns. (Since the rows are wider apart, the stones are actually
ellipses.)
% basic parameters
/Black {0 0 0 setrgbcolor} def
/White {1 1 1 setrgbcolor} def
/BoardColor {1 1 1 setrgbcolor} def
% color for Black stones: C
% color for white stones: C
% color for board: C
%/BoardColor {.94 .90 .55 setrgbcolor} def
% for color printer
(burlywood1): C
/linethick .04 def
% linethickness: D
/noteaura .15 def
% erase lines this close to letters: D
/letht .53 def
% height of letters and digits: D
/notew .84 def
% width of multidigit numbers: D
/bsradius .5 def
% black stone radius: D
% Parameters that are currently derived, but needn't be
/bscolor /Black load def
% black stone color: C
/bsnotecolor /White load def
% color of notes on black
stones: C
/wscolor /White load def
% white stone color: C
/wsedgecolor /Black load def
% color of white stone edge: C
/wsnotecolor /Black load def
% color of notes on white
stones: C
/wsthick linethick 5 mul 4 div def
% white stone edge
thickness: D
/wsradius bsradius wsthick 2 div sub def
%white stone radius: D
/symradius wsradius .7 mul def
% radius of symbols: D
/linecolor /Black load def
% color of lines on board: C
/edgethick linethick 1.5 mul def
% thickness of edge lines: D
/hoshicolor /linecolor load def
% color of hoshi dot: C
/hoshiradius linethick 3 mul def
% radius of hoshi dot: D
/boardnotecolor /Black load def
% color of notes on empty: C
/notethick linethick 2 mul def
% thickness of lines in
symbols: D
The font used for notes on stones is given just before the definition of
onedigitfont.
==========================================
/godict 60 dict def
godict begin
% currently using 55
% basic parameters
/Black {0 0 0 setrgbcolor} def
/White {1 1 1 setrgbcolor} def
/BoardColor {1 1 1 setrgbcolor} def
%/BoardColor {.94 .90 .55 setrgbcolor} def
(burlywood1)
/linethick .04 def
% linethickness
%derived parameters
/bscolor /Black load def
/bsnotecolor /White load def
stones
/bsradius .5 def
/wscolor /White load def
/wsedgecolor /Black load def
% for color printer
% black stone color
% color of notes on black
% black stone radius
% white stone color
% color of whiteestone edge
/wsnotecolor /Black load def
stones
/wsthick linethick 5 mul 4 div def
thickness
/wsradius bsradius wsthick 2 div sub def
% color of notes on white
% white stone edge
%white stone radius
/linecolor /Black load def
% /linethick
defined above
/edgethick linethick 1.5 mul def
% color of lines on board
/hoshicolor /linecolor load def
/hoshiradius linethick 3 mul def
% color of hoshi dot
% radius of hoshi dot
% thickness of edge lines
/boardnotecolor /Black load def
/notethick linethick 2 mul def
symbols
/noteaura .15 def
% erase
this
/symradius wsradius .7 mul def
%
/letht .53 def
%
/notew .84 def
%
/corner 2 sqrt 2 div symradius mul def %
cross
/trix 3 sqrt 2 div symradius mul def
corners
% thickness of lines in
lines closer to letters than
radius of symbols
height of letters and digits
width of multidigit numbers
x&y coords of end of diagonal
% x for triangle bottom
/strbounds {
% start with string on stack. leave llx urx ury
lly
gsave
newpath 0 0 moveto
false charpath flattenpath pathbbox % llx lly urx ury
3 -1 roll
% llx urx ury lly
grestore
} def
% define fonts for notes in stones
/Helvetica findfont setfont
% onedigitfont is scaled so height of (8) is letht
(8) strbounds sub /dy exch def
pop pop
/onedigitfont
currentfont letht dy div dup neg [ 1 0 0 1 0 0 ] scale
makefont def
% twodigitfont is same height but scaled to fit (88) in notew width
(88) strbounds
pop pop
exch sub /dx exch def
/twodigitfont onedigitfont [ notew dx div
0 0 1 0 0 ] makefont def
(111) strbounds pop pop
exch sub /dx exch def
/threedigitfont
onedigitfont [ notew dx div
0 0 1 0 0 ] makefont
def
(%) {
% draw a diagonal cross
moveto corner neg dup rmoveto
corner 2 mul
dup dup rlineto
dup neg 0 rmoveto
dup neg rlineto
} def
(+) {
% draw an orthogonal cross
moveto symradius neg 0 rmoveto symradius 2 mul 0 rlineto
symradius neg dup rmoveto 0 symradius 2 mul rlineto
} def
(#) {
% draw a square
moveto corner dup rmoveto
corner 2 mul
dup neg 0 rlineto dup 0 exch neg rlineto
0 rlineto closepath
} def
(@) {
% draw a circle
symradius notethick 2 div sub
0 360 arc
} def
(^) {
% draw a triangle
moveto 0 symradius neg rmoveto
trix symradius 1.5 mul rlineto
trix -2 mul 0 rlineto
closepath
} def
(-) {
% draw a dash
moveto symradius neg 0 rmoveto
symradius 2 mul 0 rlineto
} def
/dxdy {
% compute dx and dy to center the string on stack
strbounds
add 2 div neg /dy exch def
add 2 div neg /dx exch def
} def
/showcentered { % shows its arg string centered at current point
dup dxdy dx dy rmoveto show
} def
/noteparams {
% compute offset to center string on a point
% stack : n
% results: set sproc, dx and dy; choose and set font
/n exch def
godict n known {
% special symbol
/proc godict n get def
}{
% text : get offsets from pathbbox
/proc 0 def
[ onedigitfont onedigitfont twodigitfont threedigitfont ]
n length {get} stopped {onedigitfont} if setfont
n dxdy
} ifelse
} def
/note {
% draw annotation
stack: x y note
% notes are: integer letter @ + % # ^
% color must have been set
/n exch def
newpath
% at center of spot
/proc load 0 ne {
% special symbol
0 setlinecap
notethick setlinewidth
proc stroke
% perform function for special symbol
}{
% text
moveto dx dy rmoveto
n show
} ifelse
} def
/wst {
% white stone
stack: x y
2 copy
wscolor
newpath wsradius 0 360 arc fill
wsthick setlinewidth
wsedgecolor
newpath wsradius 0 360 arc stroke
} def
/bst {
% black stone
stack: x y
bscolor
newpath bsradius 0 360 arc fill
} def
/wstn {
% white stone with note
3 copy noteparams
wst
wsnotecolor
note
} def
stack: x y note
/bstn {
% black stone with note
3 copy noteparams
bst
bsnotecolor
note
} def
/hoshi {
% draw hoshi dot
stack: x y
hoshicolor
newpath hoshiradius 0 360 arc fill
} def
stack: x y note
/spotn {
% note on empty spot
stack: x y note
% stroke with wide stroke and then scale to size to fill
/n exch def
2 copy
% x y x y
% figure out what part of grid to hide
n noteparams
gsave
newpath translate
0 0
/proc load 0 ne {
proc strokepath
% outline the symbol
}{
moveto dx dy rmoveto
n false charpath
} ifelse
noteaura setlinewidth
1 setlinejoin
1 setlinecap
currentflat 3 mul setflat
BoardColor
stroke
% stroke line edges with BoardColor
0 0 noteaura 2 mul 0 360 arc
fill
% and fill an interior
circle
grestore
boardnotecolor
n
note
} def
end
% stop defining godict
/godict godict def
72 72 translate
godict begin
9
20
dup 31 mul
dtransform
0 exch neg
% height in rows
% printcolwidth
29 div neg % computed row spacing
round exch round exch idtransform scale
translate
% indices
/Times-Roman findfont [.6 0 0 -.6 0 0 ] makefont setfont
/xxoff (19) stringwidth pop .7 mul .6 add def
/yxoff newpath 0 0 moveto
(X) false charpath flattenpath pathbbox % llx lly urx ury
exch pop exch sub .7 mul exch pop .6 add def
xxoff 2 mul yxoff 2 mul translate
/inxlet (ABCDEFGHJKLMNOPQRSTUVWXYZ) def
0 1 8 { %draw top/bottom indices
%% dobj->width - 1
dup dup newpath
inxlet exch 1 getinterval /let exch def
yxoff neg moveto let showcentered
yxoff 8 add moveto let showcentered %% dobj->height - 1
} for
0 1 8 { % draw side indices
%% dobj->height - 1
dup dup newpath
9 exch sub inxlet cvs /let exch def
xxoff neg exch moveto let showcentered
xxoff 8 add exch moveto let showcentered %% dobj->width - 1
} for
%draw non-edge grid lines
2 setlinecap linecolor linethick setlinewidth
1 1 7 { %draw horizontals
dup newpath 0 exch moveto 8.5 exch lineto stroke % or -.5 ... .5
} for
1 1 8 { %draw verticals
dup newpath 0 moveto 8 lineto stroke % or -.5 ... .5
} for
% do edges
edgethick setlinewidth
newpath 0 0 moveto 8.5 0 lineto stroke % top
newpath 0 0 moveto 0 8 lineto stroke % left edge
newpath 0 8 moveto 8.5 8 lineto stroke %bottom
% hoshi (at an artificial postion)
1 5 hoshi
%
0
4
2
1
0
6
0
stones
1 (^) spotn 2 1 (#) spotn 1 0 (@) spotn 3 0 (%) spotn 8 1 (+) spotn
0 bst 5 0 (^) wstn
6 0 (1) bstn 7 0 wst
1 bst
3 1 wst 4 1 bst 5 1 (a) spotn 6 1 (w) spotn 7 1 (h) spotn
2 bst 2 2 wst 3 2 wst 4 2 bst 5 2 wst 7 2 wst
3 bst 1 3 (@) bstn 2 3 (#) bstn 3 3 (%) bstn 4 3 (+) bstn
5 3 wst
3 wst 7 3 bst
4 (@) wstn 1 4 (#) wstn 2 4 (%) wstn 3 4 bst 5 4 (29) bstn
6 4 (37) wstn 7 4 (100) wstn 8 4 wst
2 5 wst 3 5 bst 4 5 bst 5 5 bst 6 5 bst 7 5 bst 8 5 bst
0 6 (a) bstn 1 6 (w) bstn 2 6 (f) wstn 3 6 (g) bstn 4 6 wst 5 6 wst 6 6
wst 7 6 wst 8 6 wst
0 7 bst 1 7 bst 2 7 (218) wstn 3 7 bst 4 7 wst 5 7 (B) spotn 6 7 bst 7
7 (C) spotn 8 7 wst
2 8 wst 3 8 bst 4 8 wst 5 8 (A) spotn 6 8 bst 7 8 bst 8 8 (D) spotn
end
% stop using godict