Files
alttpr-baserom/dungeondrops.asm
2024-02-23 11:11:59 -06:00

326 lines
8.5 KiB
NASM

;================================================================================
; Dungeon & Boss Drop Fixes
;--------------------------------------------------------------------------------
SpawnDungeonPrize:
PHX : PHB
JSL AttemptItemSubstitution
JSL ResolveLootIDLong
STA.w ItemReceiptID
TAX
LDA.b #$29 : LDY.b #$06
JSL AddAncillaLong
BCS .failed_spawn
LDA.w ItemReceiptID
STA.w AncillaGet,X : STA.w SpriteID,X
JSR AddDungeonPrizeAncilla
.failed_spawn
PLB : PLX
RTL
AddDungeonPrizeAncilla:
LDY.w ItemReceiptID
STZ.w AncillaVelocityY,X
STZ.w AncillaVelocityX,X
STZ.w AncillaGeneralF,X
STZ.w AncillaGeneralA,X
STZ.w AncillaGeneralN,X
LDA.b #$D0 : STA.w AncillaVelocityZ,X
LDA.b #$80 : STA.w AncillaZCoord,X
LDA.b #$09 : STA.w AncillaTimer,X
LDA.b #$00 : STA.w AncillaGeneralD,X
LDA.w AncillaGet,X : STA.w ItemReceiptID
LDA.w DungeonID : CMP.b #$14 : BNE .not_hera
LDA.b LinkPosY+1 : AND.b #$FE
INC A
STA.b Scrap01
STZ.b Scrap00
LDA.b LinkPosX+1 : AND.b #$FE
INC A
STA.b Scrap03
STZ.b Scrap02
BRA .set_coords_exit
.not_hera
TYA : ASL : TAY
REP #$20
LDA.w #$0078
CLC : ADC.b BG2V
STA.b Scrap00
LDA.w #$0078
CLC : ADC.b BG2H
STA.b Scrap02
SEP #$20
.set_coords_exit
LDA.b Scrap00 : STA.w AncillaCoordYLow,X
LDA.b Scrap01 : STA.w AncillaCoordYHigh,X
LDA.b Scrap02 : STA.w AncillaCoordXLow,X
LDA.b Scrap03 : STA.w AncillaCoordXHigh,X
RTS
PrepPrizeTile:
PHA : PHX : PHY
LDA.w AncillaGet, X
JSL AttemptItemSubstitution
JSL ResolveLootIDLong
STA.w SpriteID,X
JSL TransferItemReceiptToBuffer_using_ReceiptID
PLY : PLX : PLA
RTL
SetItemPose:
PHA
LDA.w DungeonID : BMI .one_handed
LDA.w RoomItemsTaken : BIT.b #$80 : BNE +
.one_handed
PLA
JML Link_ReceiveItem_not_cool_pose
+
JSR CrystalOrPendantBehavior : BCC .one_handed
.two_handed
PLA
JML Link_ReceiveItem_cool_pose
SetPrizeCoords:
PHX : PHY
STZ.b Scrap03
LDA.w ItemReceiptMethod : CMP.b #$03 : BEQ +
.regular_coords
PLY : PLX
LDY.w AncillaGet,X
RTL
+
JSR CrystalOrPendantBehavior : BCC .regular_coords
PLY : PLX
LDY.b #$20 ; Treat as crystal
RTL
SetCutsceneFlag:
; Out: c - Cutscene flag $02 if set, $01 if unset.
PHX
LDY.b #$01 ; wrote over
LDA.w DungeonID : BMI .no_cutscene
LDA.w RoomItemsTaken : BIT #$80 : BNE .dungeon_prize
.no_cutscene
SEP #$30
PLX
CLC
RTL
.dungeon_prize
LDA.w ItemReceiptMethod : CMP.b #$03 : BCC .no_cutscene
JSR SetDungeonCompleted
LDA.w ItemReceiptID
REP #$30
AND.w #$00FF : ASL : TAX
LDA.l InventoryTable_properties,X : BIT.w #$0080 : BEQ .no_cutscene
SEP #$31
PLX
RTL
AnimatePrizeCutscene:
LDA.w ItemReceiptMethod : CMP.b #$03 : BNE +
JSR CrystalOrPendantBehavior : BCC +
LDA.w DungeonID : BMI +
LDA.w RoomItemsTaken : BIT #$80 : BEQ +
SEC
RTL
+
CLC
RTL
PrizeDropSparkle:
LDA.w AncillaID,X : CMP.b #$29 : BNE .no_sparkle
JSR CrystalOrPendantBehavior : BCC .no_sparkle
SEC
RTL
.no_sparkle
CLC
RTL
HandleDropSFX:
LDA.w RoomItemsTaken : BIT #$80 : BEQ .no_sound
JSR CrystalOrPendantBehavior : BCC .no_sound
SEC
RTL
.no_sound
CLC
RTL
HandleCrystalsField:
TAX
LDA.w ItemReceiptID : CMP.b #$20 : BNE .not_crystal
TXA
STA.l CrystalsField
RTL
.not_crystal
RTL
MaybeKeepLootID:
PHA
LDA.w DungeonID : BMI .no_prize
LDA.w RoomItemsTaken : BIT #$80 : BNE .prize
.no_prize
STZ.w ItemReceiptID
STZ.w ItemReceiptPose
PLA
RTL
.prize
STZ.w ItemReceiptPose
PLA
RTL
CheckSpawnPrize:
; In: A - DungeonID
; Out: c - Spawn prize if set
REP #$20
LDX.w DungeonID
LDA.l DungeonItemMasks,X : AND.l DungeonsCompleted : BEQ .spawn
SEP #$20
CLC
RTL
.spawn
SEP #$21
RTL
CheckDungeonCompletion:
LDX.w DungeonID
REP #$20
LDA.l DungeonItemMasks,X : AND.l DungeonsCompleted
SEP #$20
RTL
PendantMusicCheck:
; In: A - Item receipt ID
PHX
TAY
LDA.w ItemReceiptMethod : CMP.b #$03 : BNE .dont_wait
TYA
REP #$30
AND.w #$00FF : ASL : TAX
LDA.l InventoryTable_properties,X : BIT.w #$0080 : BNE .dont_wait
SEP #$31
PLX
RTL
.dont_wait
SEP #$30
PLX
CLC
RTL
PrepPrizeOAMCoordinates:
PHX : PHY
LDY.w AncillaLayer,X
LDA.w $F67F,Y : STA.b $65
STZ.b $64
LDA.w AncillaCoordYLow,X : STA.b Scrap00
LDA.w AncillaCoordYHigh,X : STA.b Scrap01
LDA.w AncillaCoordXLow,X : STA.b Scrap02
LDA.w AncillaCoordXHigh,X : STA.b Scrap03
REP #$20
LDA.b Scrap00
SEC : SBC.w $0122
STA.b Scrap00
LDA.b Scrap02
SEC : SBC.w $011E
STA.b Scrap02
STA.b Scrap04
REP #$20
LDA.w AncillaZCoord,X
AND.w #$00FF
STA.b ScrapBuffer72
LDA.b Scrap00
STA.b Scrap06
SEC
SBC.b ScrapBuffer72
STA.b Scrap00
SEP #$20
TXY
LDA.w AncillaGet,X : TAX
LDA.l SpriteProperties_chest_width,X : BNE .wide
TYX
LDA.w AncillaID,X : CMP.b #$3E : BEQ .rising_crystal
REP #$20
LDA.b Scrap00
CLC : ADC.w #$0008
STA.b Scrap08
LDA.b Scrap02
CLC : ADC.w #$0004
STA.b Scrap02 : STA.b Scrap0A
BRA .wide
.rising_crystal
REP #$20
LDA.b Scrap00
CLC : ADC.w #$0008 : STA.b Scrap08
LDA.b Scrap02 : STA.b Scrap0A
.wide
SEP #$20
PLY : PLX
RTL
PrepPrizeShadow:
PHX
LDA.w ItemReceiptID : TAX
LDA.l SpriteProperties_standing_width,X : BNE .wide
LDA.b Scrap02
SEC : SBC.b #$04
STA.b Scrap02
.wide
LDA.b #$20 : STA.b Scrap04 ; What we wrote over
PLX
RTL
CheckPoseItemCoordinates:
PHX
LDA.w ItemReceiptPose : BEQ .done
BIT.b #$02 : BEQ .done
LDA.w AncillaGet,X : TAX
LDA.l SpriteProperties_chest_width,X : BNE .done
LDA.b Scrap02
CLC : ADC.b #$04
STA.b Scrap02
.done
PLX
LDA.w AncillaGet,X
TAX
RTL
CrystalOrPendantBehavior:
; Out: c - Crystal Behavior if set, pendant if unset
PHA : PHX
LDA.w AncillaGet,X
REP #$31
AND.w #$00FF : ASL : TAX
LDA.l InventoryTable_properties,X : BIT.w #$0080 : BNE .crystal_behavior
SEP #$30
PLX : PLA
RTS
.crystal_behavior
SEP #$31
PLX : PLA
RTS
CheckDungeonWorld:
; Maintain vanilla door opening behavior with dungeon prizes
TXA : CMP.b #$05 : BCS .dark_world
REP #$02
RTL
.dark_world
SEP #$02
RTL
SetDungeonCompleted:
LDX.w DungeonID : BMI +
REP #$20
LDA.l DungeonItemMasks, X : ORA.l DungeonsCompleted : STA.l DungeonsCompleted
SEP #$20
+
RTS