/
poisonstep.asm
154 lines (135 loc) · 2.45 KB
/
poisonstep.asm
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DoPoisonStep::
ld a, [wPartyCount]
and a
jr z, .no_faint
xor a
ld c, wPoisonStepDataEnd - wPoisonStepData
ld hl, wPoisonStepData
.loop_clearPoisonStepData
ld [hli], a
dec c
jr nz, .loop_clearPoisonStepData
xor a
ld [wCurPartyMon], a
.loop_check_poison
call .DamageMonIfPoisoned
jr nc, .not_poisoned
; the output flag is stored in c, copy it to [wPoisonStepPartyFlags + [wCurPartyMon]]
; and set the corresponding flag in wPoisonStepFlagSum
ld a, [wCurPartyMon]
ld e, a
ld d, 0
ld hl, wPoisonStepPartyFlags
add hl, de
ld [hl], c
ld a, [wPoisonStepFlagSum]
or c
ld [wPoisonStepFlagSum], a
.not_poisoned
ld a, [wPartyCount]
ld hl, wCurPartyMon
inc [hl]
cp [hl]
jr nz, .loop_check_poison
ld a, [wPoisonStepFlagSum]
and %10
jr nz, .someone_has_fainted
ld a, [wPoisonStepFlagSum]
and %01
jr z, .no_faint
call .PlayPoisonSFX
xor a
ret
.someone_has_fainted
ld a, BANK(.Script_MonFaintedToPoison)
ld hl, .Script_MonFaintedToPoison
call CallScript
scf
ret
.no_faint
xor a
ret
.DamageMonIfPoisoned:
; check if mon is poisoned, return if not
ld a, MON_STATUS
call GetPartyParamLocation
ld a, [hl]
and 1 << PSN
ret z
; check if mon is already fainted, return if so
ld a, MON_HP
call GetPartyParamLocation
ld a, [hli]
ld b, a
ld c, [hl]
or c
ret z
; do 1 HP damage
dec bc
ld [hl], c
dec hl
ld [hl], b
; check if mon has fainted as a result of poison damage
ld a, b
or c
jr nz, .not_fainted
; the mon has fainted, reset its status, set carry, and return %10
ld a, MON_STATUS
call GetPartyParamLocation
ld [hl], 0
ld c, %10
scf
ret
.not_fainted
; set carry and return %01
ld c, %01
scf
ret
.PlayPoisonSFX:
ld de, SFX_POISON
call PlaySFX
ld b, $2
predef LoadPoisonBGPals
call DelayFrame
ret
.Script_MonFaintedToPoison:
callasm .PlayPoisonSFX
opentext
callasm .CheckWhitedOut
iffalse .whiteout
closetext
end
.whiteout
farsjump OverworldWhiteoutScript
.CheckWhitedOut:
xor a
ld [wCurPartyMon], a
ld de, wPoisonStepPartyFlags
.party_loop
push de
ld a, [de]
and %10
jr z, .mon_not_fainted
ld c, HAPPINESS_POISONFAINT
farcall ChangeHappiness
farcall GetPartyNickname
ld hl, .PoisonFaintText
call PrintText
.mon_not_fainted
pop de
inc de
ld hl, wCurPartyMon
inc [hl]
ld a, [wPartyCount]
cp [hl]
jr nz, .party_loop
predef CheckPlayerPartyForFitMon
ld a, d
ld [wScriptVar], a
ret
.PoisonFaintText:
text_far _PoisonFaintText
text_end
.PoisonWhiteoutText: ; unreferenced
text_far _PoisonWhiteoutText
text_end