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30 lines
637 B
Lua
30 lines
637 B
Lua
%import textio
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%import floats
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%zeropage floatsafe
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; Note: this program is compatible with C64 and CX16.
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; TODO why has the prg become bigger since register args?
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; TODO doesn't work properly anymore
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main {
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struct Ball {
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float t
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ubyte color
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}
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sub start() {
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Ball ball
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repeat {
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ubyte xx=(sin(ball.t) * txt.DEFAULT_WIDTH/2.1) + txt.DEFAULT_WIDTH/2.0 as ubyte
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ubyte yy=(cos(ball.t*1.1356) * txt.DEFAULT_HEIGHT/2.1) + txt.DEFAULT_HEIGHT/2.0 as ubyte
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txt.setcc(xx, yy, 81, ball.color)
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ball.t += 0.08
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ball.color++
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}
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}
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}
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