pokecrystal/home/clear_sprites.asm

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NASM
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2018-06-24 14:09:41 +00:00
ClearSprites::
; Erase OAM data
ld hl, wShadowOAM
ld b, wShadowOAMEnd - wShadowOAM
xor a
.loop
ld [hli], a
dec b
jr nz, .loop
ret
2018-06-24 14:09:41 +00:00
HideSprites::
; Set all OAM y-positions to 160 to hide them offscreen
ld hl, wShadowOAMSprite00YCoord
ld de, SPRITEOAMSTRUCT_LENGTH
ld b, NUM_SPRITE_OAM_STRUCTS
ld a, SCREEN_WIDTH_PX
.loop
ld [hl], a ; y
add hl, de
dec b
jr nz, .loop
ret