2020-02-10 16:06:56 +00:00
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100 REM COLORED SERPINSKI TRIANGLES
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110 CLEAR:HGR:POKE 49234,0
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120 seed=RND(-PEEK(78)-PEEK(79)*256)
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130 REM SCREEN SIZE AND MAIN TRIANGLE VERTICES
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140 w=279:w2=139:h=192:h2=96:DIM x(2),y(2)
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150 x(0)=0:y(0)=h:x(1)=w2:y(1)=0:x(2)=w:y(2)=h
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160 REM ARRAY OF RANDOM HI-RES COLOURS
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170 DIM c(3):c(0)=1:c(1)=2:c(2)=5:c(3)=6
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180 FOR i=0 TO 3:j=INT(RND(1)*4)
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190 t=c(i):c(i)=c(j):c(j)=t:NEXT
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200 REM START POINT AND NUMBER OF DOTS
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210 x=0:y=191:dots=40000
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220 REM PLOT POINTS HALFWAY TOWARDS RANDOM VERTICES
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230 FOR i=0 to dots
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240 v=rnd(1)*3:x=(x+x(v))/2:y=(y+y(v))/2
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250 IF y =>h THEN y=191
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260 REM PICK COLOR FOR EACH TRIANGLE
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270 HCOLOR=c(0):IF y>h2 THEN HCOLOR=c(1)
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280 IF y>h2 AND x>w2 THEN HCOLOR=c(2)
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290 HPLOT x,y:NEXT
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300 PRINT CHR$(7):END
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