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- SubstituteEffect_:
- ld c, 50
- call DelayFrames
- ld hl, wBattleMonMaxHP
- ld de, wPlayerSubstituteHP
- ld bc, wPlayerBattleStatus2
- ld a, [H_WHOSETURN]
- and a
- jr z, .notEnemy
- ld hl, wEnemyMonMaxHP
- ld de, wEnemySubstituteHP
- ld bc, wEnemyBattleStatus2
- .notEnemy
- ld a, [bc]
- bit HAS_SUBSTITUTE_UP, a ; user already has substitute?
- jr nz, .alreadyHasSubstitute
- ; quarter health to remove from user
- ; assumes max HP is 1023 or lower
- push bc
- ld a, [hli]
- ld b, [hl]
- srl a
- rr b
- srl a
- rr b ; max hp / 4
- push de
- ld de, wBattleMonHP - wBattleMonMaxHP
- add hl, de ; point hl to current HP low byte
- pop de
- ld a, b
- ld [de], a ; save copy of HP to subtract in ccd7/ccd8 [how much HP substitute has]
- ld a, [hld]
- ; subtract [max hp / 4] to current HP
- sub b
- ld d, a
- ld a, [hl]
- sbc 0
- pop bc
- jr c, .notEnoughHP ; underflow means user would be left with negative health
- ; bug: since it only branches on carry, it will possibly leave user with 0 HP
- .userHasZeroOrMoreHP
- ldi [hl], a ; save resulting HP after subtraction into current HP
- ld [hl], d
- ld h, b
- ld l, c
- set HAS_SUBSTITUTE_UP, [hl]
- ld a, [wOptions]
- bit 7, a ; battle animation is enabled?
- ld hl, PlayCurrentMoveAnimation
- ld b, BANK(PlayCurrentMoveAnimation)
- jr z, .animationEnabled
- ld hl, AnimationSubstitute
- ld b, BANK(AnimationSubstitute)
- .animationEnabled
- call Bankswitch ; jump to routine depending on animation setting
- ld hl, SubstituteText
- call PrintText
- jpab DrawHUDsAndHPBars
- .alreadyHasSubstitute
- ld hl, HasSubstituteText
- jr .printText
- .notEnoughHP
- ld hl, TooWeakSubstituteText
- .printText
- jp PrintText
- SubstituteText:
- TX_FAR _SubstituteText
- db "@"
- HasSubstituteText:
- TX_FAR _HasSubstituteText
- db "@"
- TooWeakSubstituteText:
- TX_FAR _TooWeakSubstituteText
- db "@"
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