path: root/engine/events.asm

INCLUDE "includes.asm"


SECTION "Events", ROMX, BANK[EVENTS]

OverworldLoop:: ; 966b0
	xor a
	ld [MapStatus], a
.loop
	ld a, [MapStatus]
	ld hl, .jumps
	rst JumpTable
	ld a, [MapStatus]
	cp 3 ; done
	jr nz, .loop
.done
	ret

.jumps
	dw StartMap
	dw EnterMap
	dw HandleMap
	dw .done
; 966cb


ClearAllScriptFlags3: ; 966cb
	xor a
	ld [ScriptFlags3], a
	ret
; 966d0

SetAll_ScriptFlags3:: ; 966d0
	ld a, $ff
	ld [ScriptFlags3], a
	ret
; 966d6

CheckBit5_ScriptFlags3: ; 966d6
	ld hl, ScriptFlags3
	bit 5, [hl]
	ret
; 966dc

ResetBit2_ScriptFlags3: ; 966dc
	ld hl, ScriptFlags3
	res 2, [hl]
	ret
; 966e2

ResetBit1_ScriptFlags3: ; 966e2
	ld hl, ScriptFlags3
	res 1, [hl]
	ret
; 966e8

ResetBit0_ScriptFlags3: ; 966e8
	ld hl, ScriptFlags3
	res 0, [hl]
	ret
; 966ee

ResetBit4_ScriptFlags3: ; 966ee
	ld hl, ScriptFlags3
	res 4, [hl]
	ret
; 966f4

SetBit2_ScriptFlags3: ; 966f4
	ld hl, ScriptFlags3
	set 2, [hl]
	ret
; 966fa

SetBit1_ScriptFlags3: ; 966fa
	ld hl, ScriptFlags3
	set 1, [hl]
	ret
; 96700

SetBit0_ScriptFlags3: ; 96700
	ld hl, ScriptFlags3
	set 0, [hl]
	ret
; 96706

SetBit4_ScriptFlags3: ; 96706
	ld hl, ScriptFlags3
	set 4, [hl]
	ret
; 9670c

CheckBit2_ScriptFlags3: ; 9670c
	ld hl, ScriptFlags3
	bit 2, [hl]
	ret
; 96712

CheckBit1_ScriptFlags3: ; 96712
	ld hl, ScriptFlags3
	bit 1, [hl]
	ret
; 96718

CheckBit0_ScriptFlags3: ; 96718
	ld hl, ScriptFlags3
	bit 0, [hl]
	ret
; 9671e

CheckBit4_ScriptFlags3: ; 9671e
	ld hl, ScriptFlags3
	bit 4, [hl]
	ret
; 96724


StartMap: ; 96724
	xor a
	ld [ScriptVar], a
	xor a
	ld [ScriptRunning], a
	ld hl, MapStatus
	ld bc, $3e ; 62
	call ByteFill
	callba InitCallReceiveDelay
	call ClearJoypad
	; fallthrough
; 9673e


EnterMap: ; 9673e
	xor a
	ld [wd453], a
	ld [wd454], a
	call SetUpFiveStepWildEncounterCooldown
	callba RunMapSetupScript
	call ClearAllScriptFlags3

	ld a, [hMapEntryMethod]
	cp MAPSETUP_07
	jr nz, .dontset
	call SetAll_ScriptFlags3
.dontset

	ld a, [hMapEntryMethod]
	cp MAPSETUP_RELOADMAP
	jr nz, .dontresetpoison
	xor a
	ld [PoisonStepCount], a
.dontresetpoison

	xor a ; end map entry
	ld [hMapEntryMethod], a
	ld a, 2 ; HandleMap
	ld [MapStatus], a
	ret
; 9676d


Function9676d: ; 9676d
	ld c, 30
	call DelayFrames
	ret
; 96773


HandleMap: ; 96773
	call ResetOverworldDelay
	call Function967c1
	callba Function97e08
	call MapEvents

; Not immediately entering a connected map will cause problems.
	ld a, [MapStatus]
	cp 2 ; HandleMap
	ret nz

	call Function967d1
	call NextOverworldFrame
	call Function967e1
	call Function967f4
	ret
; 96795


MapEvents: ; 96795
	ld a, [MapEventStatus]
	ld hl, .jumps
	rst JumpTable
	ret

.jumps
	dw .events
	dw .no_events
; 967a1

.events ; 967a1
	call PlayerEvents
	call ClearAllScriptFlags3
	callba ScriptEvents
	ret
; 967ae

.no_events ; 967ae
	ret
; 967af


MaxOverworldDelay: ; 967af
	db 2
; 967b0

ResetOverworldDelay: ; 967b0
	ld a, [MaxOverworldDelay]
	ld [OverworldDelay], a
	ret
; 967b7

NextOverworldFrame: ; 967b7
	ld a, [OverworldDelay]
	and a
	ret z
	ld c, a
	call DelayFrames
	ret
; 967c1

Function967c1: ; 967c1
	ld a, [MapEventStatus]
	cp 1 ; no events
	ret z

	call UpdateTime
	call GetJoypad
	call TimeOfDayPals
	ret
; 967d1

Function967d1: ; 967d1
	callba Function576a
	callba Functiond497
	call Function96812
	ret
; 967e1

Function967e1: ; 967e1
	callba RefreshMapAppearDisappear
	callba Functiond4d2
	callba Functionb8098
	ret
; 967f4

Function967f4: ; 967f4
	ld a, [wd150]
	bit 5, a
	jr z, .events
	bit 6, a
	jr z, .noevents
	bit 4, a
	jr nz, .noevents
	call SetAll_ScriptFlags3

.events
	ld a, 0 ; events
	ld [MapEventStatus], a
	ret

.noevents
	ld a, 1 ; no events
	ld [MapEventStatus], a
	ret
; 96812

Function96812: ; 96812
	ld hl, wd150
	bit 6, [hl]
	ret z

	callba Function81ca
	ret
; 9681f


PlayerEvents: ; 9681f

	xor a
; If there's already a player event, don't interrupt it.
	ld a, [ScriptRunning]
	and a
	ret nz

	call Dummy_CheckScriptFlags3Bit5 ; This is a waste of time

	call CheckTrainerBattle3
	jr c, .ok

	call CheckTileEvent
	jr c, .ok

	call RunMemScript
	jr c, .ok

	call DoMapTrigger
	jr c, .ok

	call CheckTimeEvents
	jr c, .ok

	call OWPlayerInput
	jr c, .ok

	xor a
	ret


.ok
	push af
	callba EnableScriptMode
	pop af

	ld [ScriptRunning], a
	call DoPlayerEvent
	ld a, [ScriptRunning]
	cp 4
	jr z, .ok2
	cp 9
	jr z, .ok2

	xor a
	ld [wc2da], a

.ok2
	scf
	ret
; 96867


CheckTrainerBattle3: ; 96867
	nop
	nop
	call CheckTrainerBattle2
	jr nc, .nope

	ld a, 1
	scf
	ret

.nope
	xor a
	ret
; 96874


CheckTileEvent: ; 96874
; Check for warps, tile triggers or wild battles.

	call CheckBit2_ScriptFlags3
	jr z, .bit2

	callba CheckMovingOffEdgeOfMap
	jr c, .return4

	call CheckWarpTile
	jr c, .return6

.bit2
	call CheckBit1_ScriptFlags3
	jr z, .bit1

	call CheckCurrentMapXYTriggers
	jr c, .movement

.bit1
	call CheckBit0_ScriptFlags3
	jr z, .bit0

	call CountStep
	ret c

.bit0
	call CheckBit4_ScriptFlags3
	jr z, .ok

	call RandomEncounter
	ret c
	jr .ok ; pointless

.ok
	xor a
	ret

.return4
	ld a, 4
	scf
	ret

.return6
	ld a, [StandingTile]
	call CheckPitTile
	jr nz, .pittile
	ld a, 6
	scf
	ret

.pittile
	ld a, 5
	scf
	ret

.movement
	ld hl, MovementAnimation
	ld a, [hli]
	ld h, [hl]
	ld l, a
	call GetMapScriptHeaderBank
	call CallScript
	ret
; 968c7


CheckWildEncounterCooldown:: ; 968c7
	ld hl, wWildEncounterCooldown
	ld a, [hl]
	and a
	ret z
	dec [hl]
	ret z
	scf
	ret
; 968d1

SetUpFiveStepWildEncounterCooldown: ; 968d1
	ld a, 5
	ld [wWildEncounterCooldown], a
	ret
; 968d7

ret_968d7: ; 968d7
	ret
;968d8

SetMinTwoStepWildEncounterCooldown: ; 968d8
	ld a, [wWildEncounterCooldown]
	cp 2
	ret nc
	ld a, 2
	ld [wWildEncounterCooldown], a
	ret
; 968e4

Dummy_CheckScriptFlags3Bit5: ; 968e4
	call CheckBit5_ScriptFlags3
	ret z
	call ret_2f3e
	ret
; 968ec

DoMapTrigger: ; 968ec
	ld a, [wCurrMapTriggerCount]
	and a
	jr z, .nope

	ld c, a
	call CheckTriggers
	cp c
	jr nc, .nope

	ld e, a
	ld d, 0
	ld hl, wCurrMapTriggerHeaderPointer
	ld a, [hli]
	ld h, [hl]
	ld l, a
rept 4
	add hl,de
endr
	
	call GetMapScriptHeaderBank
	call GetFarHalfword
	call GetMapScriptHeaderBank
	call CallScript

	ld hl, ScriptFlags
	res 3, [hl]

	callba EnableScriptMode
	callba ScriptEvents

	ld hl, ScriptFlags
	bit 3, [hl]
	jr z, .nope

	ld hl, ScriptDelay + 2
	ld a, [hli]
	ld h, [hl]
	ld l, a
	ld a, [ScriptDelay + 1]
	call CallScript
	scf
	ret

.nope
	xor a
	ret
; 9693a

CheckTimeEvents: ; 9693a
	ld a, [wLinkMode]
	and a
	jr nz, .nothing

	ld hl, StatusFlags2
	bit 2, [hl]
	jr z, .do_daily

	callba CheckBugContestTimer
	jr c, .end_bug_contest
	xor a
	ret

.do_daily
	callba CheckDailyResetTimer
	callba CheckPokerusTrick
	callba CheckPhoneCall
	ret c

.nothing
	xor a
	ret

.end_bug_contest
	ld a, BANK(BugCatchingContestOverScript)
	ld hl, BugCatchingContestOverScript
	call CallScript
	scf
	ret
; 96970

.unused ; 96970
	ld a, 8
	scf
	ret
; 96974


OWPlayerInput: ; 96974

	call PlayerMovement
	ret c
	and a
	jr nz, .NoAction

; Can't perform button actions while sliding on ice.
	callba Function80404
	jr c, .NoAction

	call CheckAPressOW
	jr c, .Action

	call CheckMenuOW
	jr c, .Action

.NoAction
	xor a
	ret

.Action
	push af
	callba Function80422
	pop af
	scf
	ret
; 96999


CheckAPressOW: ; 96999
	ld a, [hJoyPressed]
	and A_BUTTON
	ret z
	call TryObjectEvent
	ret c
	call TryReadSign
	ret c
	call CheckFacingTileEvent
	ret c
	xor a
	ret
; 969ac


PlayTalkObject: ; 969ac
	push de
	ld de, SFX_READ_TEXT_2
	call PlaySFX
	pop de
	ret
; 969b5


TryObjectEvent: ; 969b5
	callba CheckFacingObject
	jr c, .IsObject
	xor a
	ret

.IsObject
	call PlayTalkObject
	ld a, [hConnectedMapWidth]
	call GetObjectStruct
	ld hl, OBJECT_MAP_OBJECT_INDEX
	add hl, bc
	ld a, [hl]
	ld [hLastTalked], a

	ld a, [hLastTalked]
	call GetMapObject
	ld hl, MAPOBJECT_COLOR
	add hl, bc
	ld a, [hl]
	and %00001111

; Bug: If IsInArray returns nc, data at bc will be executed as code.
	push bc
	ld de, 3
	ld hl, .pointers
	call IsInArray
	jr nc, .nope_bugged
	pop bc

	inc hl
	ld a, [hli]
	ld h, [hl]
	ld l, a
	jp [hl]

.nope_bugged
	xor a
	ret

.pointers
	dbw 0, .zero
	dbw 1, .one
	dbw 2, .two
	dbw 3, .three
	dbw 4, .four
	dbw 5, .five
	dbw 6, .six
	db -1
; 96a04

.zero ; 96a04
	ld hl, MAPOBJECT_SCRIPT_POINTER
	add hl, bc
	ld a, [hli]
	ld h, [hl]
	ld l, a
	call GetMapScriptHeaderBank
	call CallScript
;	ld a, -1
	ret
; 96a12

.one ; 96a12
	ld hl, MAPOBJECT_SCRIPT_POINTER
	add hl, bc
	ld a, [hli]
	ld h, [hl]
	ld l, a
	call GetMapScriptHeaderBank
	ld de, EngineBuffer1
	ld bc, 2
	call FarCopyBytes
	ld a, 3
	scf
	ret
; 96a29

.two ; 96a29
	call Function3674
	ld a, 2
	scf
	ret
; 96a30

.three ; 96a30
	xor a
	ret
; 96a32

.four ; 96a32
	xor a
	ret
; 96a34

.five ; 96a34
	xor a
	ret
; 96a36

.six ; 96a36
	xor a
	ret
; 96a38


TryReadSign: ; 96a38
	call CheckFacingSign
	jr c, .IsSign
	xor a
	ret

.IsSign
	ld a, [wd040]
	ld hl, .signs
	rst JumpTable
	ret

.signs
	dw .read
	dw .up
	dw .down
	dw .right
	dw .left
	dw .ifset
	dw .ifnotset
	dw .itemifset
	dw .copy
; 96a59

.up
	ld b, UP << 2
	jr .checkdir
.down
	ld b, DOWN << 2
	jr .checkdir
.right
	ld b, RIGHT << 2
	jr .checkdir
.left
	ld b, LEFT << 2
	jr .checkdir

.checkdir
	ld a, [PlayerDirection]
	and %1100
	cp b
	jp nz, .dontread

.read
	call PlayTalkObject
	ld hl, wd041
	ld a, [hli]
	ld h, [hl]
	ld l, a
	call GetMapScriptHeaderBank
	call CallScript
	scf
	ret

.itemifset
	call CheckSignFlag
	jp nz, .dontread
	call PlayTalkObject
	call GetMapScriptHeaderBank
	ld de, EngineBuffer1
	ld bc, 3
	call FarCopyBytes
	ld a, BANK(SignpostItemScript)
	ld hl, SignpostItemScript
	call CallScript
	scf
	ret

.copy
	call CheckSignFlag
	jr nz, .dontread
	call GetMapScriptHeaderBank
	ld de, EngineBuffer1
	ld bc, 3
	call FarCopyBytes
	jr .dontread

.ifset
	call CheckSignFlag
	jr z, .dontread
	jr .thenread

.ifnotset
	call CheckSignFlag
	jr nz, .dontread

.thenread
	push hl
	call PlayTalkObject
	pop hl
rept 2
	inc hl
endr
	call GetMapScriptHeaderBank
	call GetFarHalfword
	call GetMapScriptHeaderBank
	call CallScript
	scf
	ret

.dontread
	xor a
	ret
; 96ad8


CheckSignFlag: ; 96ad8
	ld hl, wd041
	ld a, [hli]
	ld h, [hl]
	ld l, a
	push hl
	call GetMapScriptHeaderBank
	call GetFarHalfword
	ld e, l
	ld d, h
	ld b, $2 ; check
	call EventFlagAction
	ld a, c
	and a
	pop hl
	ret
; 96af0


PlayerMovement: ; 96af0
	callba DoPlayerMovement
	ld a, c
	ld hl, .pointers
	rst JumpTable
	ld a, c
	ret
; 96afd

.pointers
	dw .zero
	dw .one
	dw .two
	dw .three
	dw .four
	dw .five
	dw .six
	dw .seven

.zero
.four ; 96b0d
	xor a
	ld c, a
	ret
; 96b10

.seven ; 96b10
	call ret_968d7 ; mobile
	xor a
	ld c, a
	ret
; 96b16

.one ; 96b16
	ld a, 5
	ld c, a
	scf
	ret
; 96b1b

.two ; 96b1b
	ld a, 9
	ld c, a
	scf
	ret
; 96b20

.three ; 96b20
; force the player to move in some direction
	ld a, BANK(Script_ForcedMovement)
	ld hl, Script_ForcedMovement
	call CallScript
;	ld a, -1
	ld c, a
	scf
	ret
; 96b2b

.five
.six ; 96b2b
	ld a, -1
	ld c, a
	and a
	ret
; 96b30


CheckMenuOW: ; 96b30
	xor a
	ld [hMenuReturn], a
	ld [$ffa1], a
	ld a, [hJoyPressed]

	bit 2, a ; SELECT
	jr nz, .Select

	bit 3, a ; START
	jr z, .NoMenu

	ld a, BANK(StartMenuScript)
	ld hl, StartMenuScript
	call CallScript
	scf
	ret

.NoMenu
	xor a
	ret

.Select
	call PlayTalkObject
	ld a, BANK(SelectMenuScript)
	ld hl, SelectMenuScript
	call CallScript
	scf
	ret
; 96b58


StartMenuScript: ; 96b58
	callasm StartMenu
	jump StartMenuCallback
; 96b5f

SelectMenuScript: ; 96b5f
	callasm SelectMenu
	jump SelectMenuCallback
; 96b66

StartMenuCallback:
SelectMenuCallback: ; 96b66
	copybytetovar hMenuReturn
	if_equal HMENURETURN_SCRIPT, .Script
	if_equal HMENURETURN_ASM, .Asm
	end
; 96b72

.Script ; 96b72
	ptjump wd0e8
; 96b75

.Asm ; 96b75
	ptcallasm wd0e8
	end
; 96b79


CountStep: ; 96b79
	; Don't count steps in link communication rooms.
	ld a, [wLinkMode]
	and a
	jr nz, .done

	; If there is a special phone call, don't count the step.
	callba CheckSpecialPhoneCall
	jr c, .doscript

	; If Repel wore off, don't count the step.
	call DoRepelStep
	jr c, .doscript

	; Count the step for poison and total steps
	ld hl, PoisonStepCount
	inc [hl]
	ld hl, StepCount
	inc [hl]
	; Every 256 steps, increase the happiness of all your Pokemon.
	jr nz, .skip_happiness

	callba StepHappiness

.skip_happiness
	; Every 256 steps, offset from the happiness incrementor by 128 steps,
	; decrease the hatch counter of all your eggs until you reach the first
	; one that is ready to hatch.
	ld a, [StepCount]
	cp $80
	jr nz, .skip_egg

	callba DoEggStep
	jr nz, .hatch

.skip_egg
	; Increase the EXP of (both) DayCare Pokemon by 1.
	callba DaycareStep

	; Every four steps, deal damage to all Poisoned Pokemon
	ld hl, PoisonStepCount
	ld a, [hl]
	cp 4
	jr c, .skip_poison
	ld [hl], 0

	callba DoPoisonStep
	jr c, .doscript

.skip_poison
	callba DoBikeStep

.done
	xor a
	ret

.doscript
	ld a, -1
	scf
	ret

.hatch
	ld a, 8
	scf
	ret
; 96bd3


.unreferenced: ; 96bd3
	ld a, 7
	scf
	ret
; 96bd7

DoRepelStep: ; 96bd7
	ld a, [wRepelEffect]
	and a
	ret z
	dec a
	ld [wRepelEffect], a
	ret nz
	ld a, BANK(RepelWoreOffScript)
	ld hl, RepelWoreOffScript
	call CallScript
	scf
	ret
; 96beb

DoPlayerEvent: ; 96beb
	ld a, [ScriptRunning]
	and a
	ret z
	cp -1 ; run script
	ret z
	cp 10
	ret nc

	ld c, a
	ld b, 0
	ld hl, ScriptPointers96c0c
rept 3
	add hl,bc
endr
	ld a, [hli]
	ld [ScriptBank], a
	ld a, [hli]
	ld [ScriptPos], a
	ld a, [hl]
	ld [ScriptPos + 1], a
	ret
; 96c0c

ScriptPointers96c0c: ; 96c0c
	dba Invalid_0x96c2d
	dba SeenByTrainerScript
	dba TalkToTrainerScript
	dba FindItemInBallScript
	dba UnknownScript_0x96c4d
	dba WarpToNewMapScript
	dba FallIntoMapScript
	dba UnknownScript_0x124c8
	dba HatchEggScript
	dba UnknownScript_0x96c4f
	dba Invalid_0x96c2d
; 96c2d

Invalid_0x96c2d: ; 96c2d
	end
; 96c2e

UnknownScript_0x96c2e: ; 96c2e
	end
; 96c2f

HatchEggScript: ; 96c2f
	callasm OverworldHatchEgg
	end
; 96c34

WarpToNewMapScript: ; 96c34
	warpsound
	newloadmap MAPSETUP_05
	end
; 96c38

FallIntoMapScript: ; 96c38
	newloadmap MAPSETUP_06
	playsound SFX_KINESIS
	applymovement PLAYER, MovementData_0x96c48
	playsound SFX_STRENGTH
	scall LandAfterPitfallScript
	end
; 96c48

MovementData_0x96c48: ; 96c48
	skyfall
	step_end
; 96c4a

LandAfterPitfallScript: ; 96c4a
	earthquake 16
	end
; 96c4d

UnknownScript_0x96c4d: ; 96c4d
	reloadandreturn $f7
; 96c4f

UnknownScript_0x96c4f: ; 96c4f
	deactivatefacing $3
	callasm SetBit4_ScriptFlags3
	end
; 96c56

INCLUDE "engine/scripting.asm"
INCLUDE "engine/events_2.asm"