24 lines
348 B
QBasic
24 lines
348 B
QBasic
'function TIC()
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' t=time()/999
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' a=s(t-11)
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' b=s(t)
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' for i=0,32639 do
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' x=i%240-120
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' y=i/240-68
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' u=a*x-b*y
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' v=b*x+a*y
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' poke4(i,(u//1~v//1)//16)
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' end
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'end
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's=math.sin
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' // is floor division, ~ is bitwise XOR. That's hard in applesoft
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10 HGR2
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20 A=SIN(T-11)
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30 B=SIN(T)
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40 FOR X=-140 TO 139
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50 FOR Y=0 TO 192
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60 U=A*X-B*Y
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70 V=B*X+A*Y
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