Use "battle_anims" and "sprite_anims" for clarity, not just "anims"

engine/battle_anims/helpers.asm

@@ -0,0 +1,130 @@
+ReinitBattleAnimFrameset: ; ce7bf (33:67bf)
+	ld hl, BATTLEANIMSTRUCT_FRAMESET_ID
+	add hl, bc
+	ld [hl], a
+	ld hl, BATTLEANIMSTRUCT_DURATION
+	add hl, bc
+	ld [hl], 0
+	ld hl, BATTLEANIMSTRUCT_FRAME
+	add hl, bc
+	ld [hl], -1
+	ret
+
+GetBattleAnimFrame: ; ce7d1
+.loop
+	ld hl, BATTLEANIMSTRUCT_DURATION
+	add hl, bc
+	ld a, [hl]
+	and a
+	jr z, .next_frame
+	dec [hl]
+	call .GetPointer
+	ld a, [hli]
+	push af
+	jr .okay
+
+.next_frame
+	ld hl, BATTLEANIMSTRUCT_FRAME
+	add hl, bc
+	inc [hl]
+	call .GetPointer
+	ld a, [hli]
+	cp -2
+	jr z, .restart
+	cp -1
+	jr z, .repeat_last
+	push af
+	ld a, [hl]
+	push hl
+	and $3f
+	ld hl, BATTLEANIMSTRUCT_DURATION
+	add hl, bc
+	ld [hl], a
+	pop hl
+
+.okay
+	ld a, [hl]
+	and $c0
+	srl a
+	ld [wBattleAnimTemp7], a
+	pop af
+	ret
+
+.repeat_last
+	xor a
+	ld hl, BATTLEANIMSTRUCT_DURATION
+	add hl, bc
+	ld [hl], a
+	ld hl, BATTLEANIMSTRUCT_FRAME
+	add hl, bc
+	dec [hl]
+	dec [hl]
+	jr .loop
+
+.restart
+	xor a
+	ld hl, BATTLEANIMSTRUCT_DURATION
+	add hl, bc
+	ld [hl], a
+	dec a
+	ld hl, BATTLEANIMSTRUCT_FRAME
+	add hl, bc
+	ld [hl], a
+	jr .loop
+
+; ce823
+
+.GetPointer: ; ce823
+	ld hl, BATTLEANIMSTRUCT_FRAMESET_ID
+	add hl, bc
+	ld e, [hl]
+	ld d, 0
+	ld hl, BattleAnimFrameData
+	add hl, de
+	add hl, de
+	ld e, [hl]
+	inc hl
+	ld d, [hl]
+	ld hl, BATTLEANIMSTRUCT_FRAME
+	add hl, bc
+	ld l, [hl]
+	ld h, $0
+	add hl, hl
+	add hl, de
+	ret
+
+; ce83c
+
+GetBattleAnimOAMPointer: ; ce83c
+	ld l, a
+	ld h, 0
+	ld de, BattleAnimOAMData
+	add hl, hl
+	add hl, hl
+	add hl, de
+	ret
+
+; ce846
+
+LoadBattleAnimObj: ; ce846 (33:6846)
+	push hl
+	ld l, a
+	ld h, 0
+	add hl, hl
+	add hl, hl
+	ld de, AnimObjGFX
+	add hl, de
+	ld c, [hl]
+	inc hl
+	ld b, [hl]
+	inc hl
+	ld a, [hli]
+	ld h, [hl]
+	ld l, a
+	pop de
+	push bc
+	call DecompressRequest2bpp
+	pop bc
+	ret
+
+; ce85e (33:685e)