mirror of
https://github.com/irmen/prog8.git
synced 2024-07-05 06:29:02 +00:00
63 lines
2.2 KiB
Lua
63 lines
2.2 KiB
Lua
%target c64
|
|
%import syslib
|
|
%zeropage basicsafe
|
|
|
|
spritedata $0a00 {
|
|
; this memory block contains the sprite data
|
|
; it must start on an address aligned to 64 bytes.
|
|
%option force_output ; make sure the data in this block appears in the resulting program
|
|
|
|
ubyte[] balloonsprite = [ %00000000,%01111111,%00000000,
|
|
%00000001,%11111111,%11000000,
|
|
%00000011,%11111111,%11100000,
|
|
%00000011,%11100011,%11100000,
|
|
%00000111,%11011100,%11110000,
|
|
%00000111,%11011101,%11110000,
|
|
%00000111,%11011100,%11110000,
|
|
%00000011,%11100011,%11100000,
|
|
%00000011,%11111111,%11100000,
|
|
%00000011,%11111111,%11100000,
|
|
%00000010,%11111111,%10100000,
|
|
%00000001,%01111111,%01000000,
|
|
%00000001,%00111110,%01000000,
|
|
%00000000,%10011100,%10000000,
|
|
%00000000,%10011100,%10000000,
|
|
%00000000,%01001001,%00000000,
|
|
%00000000,%01001001,%00000000,
|
|
%00000000,%00111110,%00000000,
|
|
%00000000,%00111110,%00000000,
|
|
%00000000,%00111110,%00000000,
|
|
%00000000,%00011100,%00000000 ]
|
|
}
|
|
|
|
main {
|
|
sub start() {
|
|
ubyte i
|
|
for i in 0 to 7 {
|
|
c64.SPRPTR[i] = $0a00/64
|
|
}
|
|
c64.SPENA = 255 ; enable all sprites
|
|
c64.set_rasterirq(220) ; enable animation
|
|
}
|
|
}
|
|
|
|
|
|
irq {
|
|
ubyte angle
|
|
|
|
sub irq() {
|
|
angle++
|
|
c64.MSIGX=0
|
|
ubyte @zp spri
|
|
for spri in 7 downto 0 {
|
|
c64.EXTCOL++
|
|
uword @zp x = sin8u(angle*2-spri*16) as uword + 50
|
|
ubyte @zp y = cos8u(angle*3-spri*16) / 2 + 70
|
|
c64.SPXYW[spri] = mkword(y, lsb(x))
|
|
c64.MSIGX <<= 1
|
|
if msb(x) c64.MSIGX++
|
|
}
|
|
c64.EXTCOL-=8
|
|
}
|
|
}
|