mirror of https://github.com/KarolS/millfork.git
93 lines
3.6 KiB
Plaintext
93 lines
3.6 KiB
Plaintext
// the emulator supports only 16 sprites:
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const byte SPRITE_COUNT = 16
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array(vera_sprite_data) sprites[SPRITE_COUNT]
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array(sbyte) vx[SPRITE_COUNT]
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array(sbyte) vy[SPRITE_COUNT]
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import random
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void main () {
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pointer.vera_sprite_data p
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byte i,j
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word x,y
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init_rand_seed()
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// make balls striped
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for i,0,parallelto,$1f {
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for j,1,parallelto,$f {
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sprite_bitmap[nonet(j<<5) + i] *= j
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}
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}
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for i,0,paralleluntil,SPRITE_COUNT {
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p = sprites[i].pointer
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// bitmap is at $10000:
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p->address = $800
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p->x.lo = rand()
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p->x.hi = rand() & 1
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p->y = rand()
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// no collision, above all layers, no flipping
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p->ctrl0 = $c
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// 32×32 pixels, different palette offsets
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p->ctrl1 = $a0 | (i & $f)
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vx[i] = 1 - (rand() & 2)
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vy[i] = 1 - (rand() & 2)
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}
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vera_upload_large($10000, sprite_bitmap.addr, sizeof(sprite_bitmap))
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vera_upload_large(VERA_SPRITES, sprites.addr, sizeof(sprites))
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// enable sprites:
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vera_set_sprites_enable(true)
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while true {
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for i,0,paralleluntil,SPRITE_COUNT {
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p = sprites[i].pointer
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x = p->x
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y = p->y
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x += vx[i]
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y += vy[i]
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p->x = x
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p->y = y
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if x == 0 { vx[i] = 1 }
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if x >= 640-32 { vx[i] = 0-1 }
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if y == 0 { vy[i] = 1 }
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if y >= 480-32 { vy[i] = 0-1 }
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}
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vera_upload_large(VERA_SPRITES, sprites.addr, sizeof(sprites))
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}
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}
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array sprite_bitmap = [
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$00,$00,$00,$00,$00,$00,$11,$11,$11,$11,$00,$00,$00,$00,$00,$00,
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$00,$00,$00,$00,$01,$11,$11,$11,$11,$11,$11,$10,$00,$00,$00,$00,
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$00,$00,$00,$01,$11,$11,$11,$11,$11,$11,$11,$11,$10,$00,$00,$00,
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$00,$00,$00,$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,$00,$00,$00,
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$00,$00,$01,$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,$10,$00,$00,
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$00,$00,$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,$00,$00,
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$00,$01,$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,$10,$00,
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$00,$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,$00,
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$00,$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,$00,
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$01,$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,$10,
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$01,$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,$10,
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$01,$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,$10,
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$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,
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$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,
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$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,
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$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,
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$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,
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$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,
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$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,
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$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,
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$01,$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,$10,
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$01,$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,$10,
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$01,$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,$10,
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$00,$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,$00,
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$00,$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,$00,
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$00,$01,$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,$10,$00,
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$00,$00,$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,$00,$00,
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$00,$00,$01,$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,$10,$00,$00,
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$00,$00,$00,$11,$11,$11,$11,$11,$11,$11,$11,$11,$11,$00,$00,$00,
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$00,$00,$00,$01,$11,$11,$11,$11,$11,$11,$11,$11,$10,$00,$00,$00,
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$00,$00,$00,$00,$01,$11,$11,$11,$11,$11,$11,$10,$00,$00,$00,$00,
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$00,$00,$00,$00,$00,$00,$11,$11,$11,$11,$00,$00,$00,$00,$00,$00
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]
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