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27 lines
613 B
Lua
27 lines
613 B
Lua
%import textio
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%zeropage basicsafe
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; Note: this program is compatible with C64 and CX16.
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main {
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const uword screenwidth = txt.DEFAULT_WIDTH
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const uword screenheight = txt.DEFAULT_HEIGHT
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struct Ball {
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uword anglex
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uword angley
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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 x = msb(sin8u(msb(ball.anglex)) * screenwidth)
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ubyte y = msb(cos8u(msb(ball.angley)) * screenheight)
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txt.setcc(x, y, 81, ball.color)
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ball.anglex+=366
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ball.angley+=291
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ball.color++
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}
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}
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}
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