prog8/examples/cx16/swirl-float.p8

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%import cx16textio
%import cx16flt
%zeropage basicsafe
main {
const uword width = 80
const uword height = 60
struct Ball {
float t
ubyte color
}
sub start() {
Ball ball
repeat {
ubyte xx=(sin(ball.t) * width/2.1) + width/2.0 as ubyte
ubyte yy=(cos(ball.t*1.1356) * height/2.1) + height/2.0 as ubyte
txt.setcc(xx, yy, 81, ball.color)
ball.t += 0.05
ball.color++
}
}
}