prog8/examples/line-circle-gfx.p8
Irmen de Jong bfe9f442e6 balloon
2020-03-28 17:06:17 +01:00

35 lines
756 B
Lua

%import c64lib
%import c64graphics
%zeropage basicsafe
main {
sub start() {
graphics.enable_bitmap_mode()
draw_lines()
draw_circles()
forever {
}
}
sub draw_circles() {
ubyte xx
for xx in 3 to 7 {
graphics.circle(xx*50-100, 10+xx*16, (xx+6)*4)
graphics.disc(xx*50-100, 10+xx*16, (xx+6)*2)
}
}
sub draw_lines() {
ubyte i
for i in 0 to 255 step 4 {
uword x1 = ((320-256)/2 as uword) + sin8u(i)
uword y1 = (200-128)/2 + cos8u(i)/2
uword x2 = ((320-64)/2 as uword) + sin8u(i)/4
uword y2 = (200-64)/2 + cos8u(i)/4
graphics.line(x1, lsb(y1), x2, lsb(y2))
}
}
}