prog8/examples/swirl-float.p8

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%import c64utils
%import c64flt
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main {
const uword width = 40
const uword height = 25
sub start() {
float t
ubyte color
repeat {
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ubyte xx=(sin(t) * width/2.2) + width/2.0 as ubyte
ubyte yy=(cos(t*1.1356) * height/2.2) + height/2.0 as ubyte
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c64scr.setcc(xx, yy, 81, color)
t += 0.08
color++
}
}
}