shithub: pokecrystal

ref: c7032617aa1df7aa44167551e4571a9557fe9539
dir: /home/clear_sprites.asm/

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ClearSprites::
; Erase OAM data
	ld hl, wVirtualOAM
	ld b, wVirtualOAMEnd - wVirtualOAM
	xor a
.loop
	ld [hli], a
	dec b
	jr nz, .loop
	ret

HideSprites::
; Set all OAM y-positions to 160 to hide them offscreen
	ld hl, wVirtualOAMSprite00YCoord
	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