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590 lines
13 KiB
590 lines
13 KiB
%!
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% vasarely
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% Elizabeth D. Zwicky
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% zwicky@sgi.com
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/vasarelysave save def % prevent residual side effects
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%
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% Inspired by Vasarely's experiments with tilting circles and squares
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% (for instance "Tlinko" and "Betelgeuse"
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%% circles
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/part { circle } def /nnrand false def
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%% squares
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% /part { ngon } def /nn 4 def /nnrand false def
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%% random polygons
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% /part { ngon } def /nnrand true def
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%% random stars (not my favorite on this program)
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% /part { nstar } def /nnrand true def
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%% tilt the base shape a random amount?
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/twist false def
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% /twist true def
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/rainbow false def
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%% To make rainbows
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% /rainbow true def
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%% Set this to 1 to go through a full range of colors
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/rainrange .25 def
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% number of different designs per page
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/inheight 2 def
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/inwidth 2 def
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% number of repeats in a design
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/xtimes 10 def
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/ytimes 16 def
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%% This sets the relationship between the two hues: comptwo is maximum contrast
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/colorway {comptwo} def
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%% monochrome comptwo harmtwo harmfour freecolor compthree closeharm
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%% origcolor
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%% This sets the brightness and saturation of the colors; vivid makes
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%% them both bright
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/colorfam {vivid} def
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%% vivid jewel intense medium pastel free orig contrast
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%% medjewel medvivid vivpastel medpastel
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%% Only experts below this point!
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usertime srand
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/seed rand def
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/starcompensate false def
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/constroke 1 def
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/circle {
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/radius radius 1.33 mul def
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currentpoint /herey exch def /herex exch def
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herex herey radius 0 360 arc
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} def
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/ngon{ % polygon of n sides, n determined by nn
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nside 2 div radius rmoveto
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nn cvi {
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nside neg 0 rlineto
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360 360 nn div sub neg rotate
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} repeat
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closepath
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} def
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/nstar{ % star of n points, n determined by nstarslider
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/radius radius 1.33 mul def
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currentpoint /herey exch def /herex exch def
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0 radius rmoveto
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90 nstarangle 2 div add neg rotate
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nn cvi {nstarside 0 rlineto
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180 180 nstarangle 2 mul sub sub neg rotate
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nstarside 0 rlineto
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180 180 360 nn div sub nstarangle 2 mul sub sub rotate
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} repeat
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90 nstarangle 2 div add rotate
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closepath
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} def
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/nstarangle {180 360 nn div sub 3 div} def
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/nstarside {
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2
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radius
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1
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180 nn div
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sin
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div
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div
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mul
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nstarangle sin
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mul
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180
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nstarangle 2 mul
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sub
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sin
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div
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} def
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/nside {
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2
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radius
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360 nn div 2 div tan
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mul
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mul
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} def
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/tan { /alpha exch def
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alpha sin
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1 alpha sin dup mul sub sqrt
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div
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} def
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/pastel {
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/backbright high def
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/backsat medlow def
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/fillbright high def
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/fillsat medlow def
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/eobright high def
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/eosat medlow def
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constroke 0 eq {
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/strokebright high def
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/strokesat medlow def
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}
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{
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/strokebright low def
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/strokesat high def
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} ifelse
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} def
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/jewel {
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/fillbright med def
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/fillsat high def
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/backbright med def
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/backsat high def
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/eobright med def
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/eosat high def
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constroke 0 eq {
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/strokebright medlow def
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/strokesat high def
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}
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{
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/strokebright high def
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/strokesat medlow def
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} ifelse
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} def
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/vivid {
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/fillsat 1 def
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/fillbright high def
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/eosat 1 def
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/eobright high def
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/backsat 1 def
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/backbright high def
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constroke 0 eq {
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/strokesat 1 def
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/strokebright high def
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}
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{
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/strokesat high def
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/strokebright medlow def
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} ifelse
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} def
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/free {
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/fillsat anyrand def
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/fillbright anyrand def
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/eosat anyrand def
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/eobright anyrand def
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/backsat anyrand def
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/backbright anyrand def
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/strokesat anyrand def
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/strokebright anyrand def
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} def
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/contrast {
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/sat medhigh def
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/bright rand 2 mod 0 eq {medhigh} {medlow} ifelse def
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/backsat sat def
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/backbright bright def
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/eosat sat def
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/eobright 1 bright sub def
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/fillsat sat def
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/fillbright bright def
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/strokebright rand 2 mod def
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/strokesat rand 2 mod def
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} def
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/medium {
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/backsat med def
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/backbright med def
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/eosat med def
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/eobright med def
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/fillsat med def
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/fillbright med def
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/strokebright med def
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/strokesat med def
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} def
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/intense {
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/backsat high def
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/backbright med def
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/eosat high def
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/eobright high def
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/fillsat high def
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/fillbright med def
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/strokebright high def
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/strokesat high def
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} def
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/orig {
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/backsat rand 99 mod 55 add 100 div def
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/backbright rand 99 mod 35 add 100 div def
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/eosat rand 77 mod 22 add 100 div def
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/eobright 90 rand 75 mod sub 15 add 100 div def
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/fillsat 100 rand 90 mod sub 100 div def
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/fillbright 100 rand 45 mod sub 20 add 100 div def
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/strokebright 100 rand 55 mod sub 100 div def
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/strokesat 100 rand 85 mod sub 100 div def
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} def
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/medjewel {
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/alt rand 2 mod def
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/backsat alt 0 eq {high} { med} ifelse def
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/fillsat alt 0 eq {med} {high} ifelse def
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/eosat alt 0 eq {high} {med} ifelse def
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/backbright med def
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/fillbright med def
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/eobright med def
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constroke 0 eq {
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/strokebright medlow def
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/strokesat high def
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}
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{
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/strokebright high def
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/strokesat medlow def
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} ifelse
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} def
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/medvivid {
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/alt rand 2 mod def
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/backsat alt 0 eq {1} { med} ifelse def
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/fillsat alt 0 eq {med} {1} ifelse def
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/eosat alt 0 eq {1} {med} ifelse def
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/backbright alt 0 eq {high} {med} ifelse def
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/eobright alt 0 eq {high} {med} ifelse def
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/fillbright alt 0 eq {med} {high} ifelse def
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constroke 0 eq {
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/strokesat 1 def
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/strokebright high def
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}
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{
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/strokesat high def
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/strokebright medlow def
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} ifelse
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} def
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/vivpastel {
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/backlight rand 2 mod def
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/backsat backlight 0 eq {medlow} {1} ifelse def
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/eosat backlight 0 eq {medlow} {1} ifelse def
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/fillsat backlight 0 eq {1} {medlow} ifelse def
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/fillbright high def
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/backbright high def
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/eobright high def
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constroke 0 eq {
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/strokesat 1 def
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/strokebright high def
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}
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{
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/strokesat high def
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/strokebright medlow def
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} ifelse
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} def
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/medpastel {
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/alt rand 2 mod def
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/backsat alt 0 eq {medlow} {med} ifelse def
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/eosat alt 0 eq {medlow} {med} ifelse def
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/fillsat alt 0 eq {med} {medlow} ifelse def
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/fillbright alt 0 eq { high } {med} ifelse def
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/backbright alt 0 eq {med} { high } ifelse def
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/eobright alt 0 eq {med} { high } ifelse def
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constroke 0 eq {
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/strokebright high def
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/strokesat medlow def
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}
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{
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/strokebright low def
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/strokesat high def
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} ifelse
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} def
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/maxcon {
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rand 2 mod 1 eq {
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/backsat 0 def
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/backbright 0 def
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/eosat 0 def
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/eobright 0 def
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/fillsat 0 def
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/fillbright 1 def
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/strokebright 1 def
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/strokesat 0 def
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}
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{
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/backsat 0 def
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/backbright 1 def
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/eosat 0 def
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/eobright 1 def
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/fillsat 0 def
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/fillbright 0 def
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/strokebright 0 def
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/strokesat 0 def
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}
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ifelse
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} def
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/monochrome {
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/fillhue hue closevary def
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/strokehue hue closevary def
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/eohue hue closevary def
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/backhue hue def
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} def
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/blackandwhite {
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/fillhue 1 def
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/eohue 0 def
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/backhue 0 def
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/strokehue 1 def
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} def
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/freecolor {
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/fillhue anyrand def
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/strokehue anyrand def
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/eohue anyrand def
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/backhue anyrand def
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} def
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/purple {
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/fillhue rand 15 mod 80 add 100 div def
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/backhue rand 15 mod 80 add 100 div def
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/strokehue rand 15 mod 80 add 100 div def
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/eohue rand 15 mod 80 add 100 div def
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/backhue rand 15 mod 80 add 100 div def
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} def
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/comptwo {
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/fillhue hue closevary def
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/strokehue hue .5 add dup 1 gt {1 sub} if def
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/backhue strokehue def
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/eohue strokehue closevary def
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} def
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/compthree {
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/backhue hue def
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/strokehue hue 1 3 div add dup 1 gt {1 sub} if closevary def
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/fillhue strokehue closevary def
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/eohue hue 1 3 div sub dup 1 lt { 1 add} if closevary def
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} def
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/origcolor {
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/backhue hue def
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/strokehue
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hue 1000 mul cvi 3 mod dup 1 eq
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{hue closevary}
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{2 eq
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{rand 999 mod 1000 div}
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{hue .5 add dup 1 gt {1 sub} if }
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ifelse
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}
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ifelse def
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/fillhue hue 1000 mul cvi 3 mod dup 1 eq
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{hue closevary}
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{2 eq
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{rand 999 mod 1000 div}
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{hue .5 add dup 1 gt {1 sub} if }
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ifelse
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}
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ifelse
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def
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/eohue hue 1000 mul cvi 2 mod 1 eq
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{hue closevary}
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{rand 999 mod 1000 div}
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ifelse def
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} def
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/harmtwo {
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/fillhue hue closevary def
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/backhue hue def
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/strokehue hue .2 add dup 1 gt {1 sub} if closevary def
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/eohue strokehue closevary def
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} def
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/harmfour {
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/fillhue hue closevary def
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/backhue hue .1 add dup 1 gt {1 sub} if def
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/strokehue hue .2 add dup 1 gt {1 sub} if closevary def
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/eohue hue .1 sub dup 1 lt {1 add} if closevary def
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} def
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/closeharm {
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/fillhue hue def
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/backhue hue .05 add dup 1 gt {1 sub} if closevary def
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/strokehue hue .1 add dup 1 gt {1 sub} if closevary def
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/eohue hue .05 sub dup 0 lt {1 add} if closevary def
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} def
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/high {100 rand 25 mod sub 100 div } def
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/med { rand 33 mod 33 add 100 div } def
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/medhigh {100 rand 50 mod sub 100 div } def
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/medlow {rand 50 mod 100 div } def
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/low { rand 25 mod 100 div} def
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/anyrand { rand 100 mod 100 div } def
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/closevary {rand 70 mod rand 100 mod sub 1000 div add} def
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%rainbow
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% {/colorfill {fillhue 1 1 sethsbcolor fill} def}
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/colorfill {fillhue fillsat fillbright sethsbcolor fill } def
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%ifelse
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/colorstroke {strokehue strokesat strokebright sethsbcolor stroke } def
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/eocolorfill {eohue eosat eobright sethsbcolor eofill } def
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/backfill{ backhue backsat backbright sethsbcolor fill } def
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/xstep { xrange xtimes 1 sub div x 1 sub mul } def
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/ystep { yrange ytimes 1 sub div y 1 sub mul} def
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/functionarray [
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{sin abs}
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{sin }
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{cos }
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{cos abs}
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{sin dup mul }
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{cos dup mul }
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{sin abs sqrt }
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{cos abs sqrt }
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] def
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/range { /top exch def /bottom exch def /number exch def
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% number is between -1 and 1
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/rangesize top bottom sub def
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number 1 add 2 div
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% number is now between 0 and 1
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rangesize mul
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bottom add
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} def
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/drawone {
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/radius
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width height lt {width 3 div} {height 3 div} ifelse
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def
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seed srand
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0 0 moveto
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/origmatrix [ 0 0 0 0 0 0 ] currentmatrix def
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[ % xstep function ystep function2 add .4 1.3 range
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1
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ystep function xstep function add -.25 .25 range
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ystep function3 xstep function2 add -.5 .5 range
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% xstep function4 ystep function mul .4 1.3 range
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1
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0
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0
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]
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concat
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twist {twistdeg rotate} if
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part colorfill
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origmatrix setmatrix
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rainbow
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{/fillhue fillhue rainrange xtimes ytimes mul div add dup 1 gt {1 sub} if def}
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if
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} def
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/notdrawone {
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seed srand
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twist {/twistdeg rand 360 mod def} if
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nnrand {/nn rand 6 mod 3 add def} if
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/x1 rand width 3 div cvi mod width 8 div add def
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/y1 rand height 3 div cvi mod height 8 div add def
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rand 3 mod dup 1 eq
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{pop /x2 rand width 2 div cvi mod def
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/y2 rand height 2 div cvi mod def}
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{ 2 eq
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{/x2 y1 def /y2 x1 def}
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{/x2 y1 width mul height div def /y2 x1 height mul width div def}
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ifelse
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}
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ifelse
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/radius width height gt {width} {height} ifelse 2.5 div def
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/stripe rand width 10 div cvi mod 2 add def
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starcompensate { /stripe stripe 2 mul def /radius radius 10 nn div mul def } if
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/i 1 def
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/repeats radius stripe div cvi 1 add def
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/nnincr 1 def
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repeats {
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colorvary {colorfam colorway} if
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/i i 1 add def
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/radius radius stripe sub def
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} repeat
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} def
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/page {
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clippath pathbbox /ury exch def /urx exch def /lly exch def /llx exch
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def
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/pagewidth urx llx sub 36 72 mul min def
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/pageheight ury lly sub 36 72 mul min def
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0 0 moveto
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llx lly translate
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/outerwidth
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pagewidth inwidth div
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def
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/outerheight
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pageheight inheight div
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def
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/width
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outerwidth xtimes div
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def
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/height
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outerheight ytimes div
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def
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/size
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width height gt {width} {height} ifelse
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def
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inwidth {
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inheight {
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/seed rand def
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/hue rand 999 mod 1000 div def
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colorway colorfam
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/x 1 def /y 1 def
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nnrand {/nn rand 6 mod 3 add def} if
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/twistdeg rand 360 mod def
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/function functionarray rand functionarray length mod get def
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/function2 functionarray rand functionarray length mod get def
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/function3 functionarray rand functionarray length mod get def
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/function4 functionarray rand functionarray length mod get def
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/xrange [ 90 180 270 360 180 360 ] rand 6 mod get def
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/yrange [ 90 180 270 360 180 360 ] rand 6 mod get def
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initclip
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newpath
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0 0 moveto
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outerwidth 0 rlineto
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0 outerheight rlineto
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outerwidth neg 0 rlineto
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backfill
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xtimes {
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ytimes{
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/y y 1 add def
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width 2 div height 2 div translate
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drawone
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width 2 div neg height 2 div neg translate
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0 height translate
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} repeat
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/y 1 def
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/x x 1 add def
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width height ytimes mul neg translate
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} repeat
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width xtimes mul neg outerheight translate
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} repeat
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outerwidth outerheight inheight mul neg translate
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} repeat
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} def
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page
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clear cleardictstack
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vasarelysave restore
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% Per page independence description in the PLRM Section 3.7.3, showpage follows restore
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|
showpage
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