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map_objects.asm
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3044 lines (2816 loc) · 48 KB
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INCLUDE "data/sprites/facings.asm"
INCLUDE "data/sprites/map_objects.asm"
DeleteMapObject::
push bc
ld hl, OBJECT_MAP_OBJECT_INDEX
add hl, bc
ld a, [hl]
push af
ld h, b
ld l, c
ld bc, OBJECT_LENGTH
xor a
call ByteFill
pop af
cp -1
jr z, .ok
bit 7, a
jr nz, .ok
call GetMapObject
ld hl, OBJECT_SPRITE
add hl, bc
ld [hl], -1
.ok
pop bc
ret
HandleObjectStep:
call CheckObjectStillVisible
ret c
call HandleStepType
call HandleObjectAction
ret
CheckObjectStillVisible:
ld hl, OBJECT_FLAGS2
add hl, bc
res OFF_SCREEN_F, [hl]
ld a, [wXCoord]
ld e, a
ld hl, OBJECT_MAP_X
add hl, bc
ld a, [hl]
add 1
sub e
jr c, .ok
cp MAPOBJECT_SCREEN_WIDTH
jr nc, .ok
ld a, [wYCoord]
ld e, a
ld hl, OBJECT_MAP_Y
add hl, bc
ld a, [hl]
add 1
sub e
jr c, .ok
cp MAPOBJECT_SCREEN_HEIGHT
jr nc, .ok
jr .yes
.ok
ld hl, OBJECT_FLAGS2
add hl, bc
set OFF_SCREEN_F, [hl]
ld a, [wXCoord]
ld e, a
ld hl, OBJECT_INIT_X
add hl, bc
ld a, [hl]
add 1
sub e
jr c, .ok2
cp MAPOBJECT_SCREEN_WIDTH
jr nc, .ok2
ld a, [wYCoord]
ld e, a
ld hl, OBJECT_INIT_Y
add hl, bc
ld a, [hl]
add 1
sub e
jr c, .ok2
cp MAPOBJECT_SCREEN_HEIGHT
jr nc, .ok2
.yes
and a
ret
.ok2
ld hl, OBJECT_FLAGS1
add hl, bc
bit WONT_DELETE_F, [hl]
jr nz, .yes2
call DeleteMapObject
scf
ret
.yes2
ld hl, OBJECT_FLAGS2
add hl, bc
set OFF_SCREEN_F, [hl]
and a
ret
HandleStepType:
ld hl, OBJECT_STEP_TYPE
add hl, bc
ld a, [hl]
and a
jr z, .zero
ld hl, OBJECT_FLAGS2
add hl, bc
bit FROZEN_F, [hl]
jr nz, .frozen
cp STEP_TYPE_FROM_MOVEMENT
jr z, .one
jr .ok3
.zero
call StepFunction_Reset
ld hl, OBJECT_FLAGS2
add hl, bc
bit FROZEN_F, [hl]
jr nz, .frozen
.one
call StepFunction_FromMovement
ld hl, OBJECT_STEP_TYPE
add hl, bc
ld a, [hl]
and a
ret z
cp STEP_TYPE_FROM_MOVEMENT
ret z
.ok3
ld hl, StepTypesJumptable
rst JumpTable
ret
.frozen
ret
HandleObjectAction:
ld hl, OBJECT_FLAGS1
add hl, bc
bit INVISIBLE_F, [hl]
jr nz, SetFacingStanding
ld hl, OBJECT_FLAGS2
add hl, bc
bit OFF_SCREEN_F, [hl]
jr nz, SetFacingStanding
bit FROZEN_F, [hl]
jr nz, _CallFrozenObjectAction
; use first column (normal)
ld de, ObjectActionPairPointers
jr CallObjectAction
HandleFrozenObjectAction:
ld hl, OBJECT_FLAGS1
add hl, bc
bit INVISIBLE_F, [hl]
jr nz, SetFacingStanding
_CallFrozenObjectAction:
; use second column (frozen)
ld de, ObjectActionPairPointers + 2
jr CallObjectAction ; pointless
CallObjectAction:
ld hl, OBJECT_ACTION
add hl, bc
ld a, [hl]
ld l, a
ld h, 0
add hl, hl
add hl, hl
add hl, de
ld a, [hli]
ld h, [hl]
ld l, a
call _hl_
ret
INCLUDE "engine/overworld/map_object_action.asm"
CopyCoordsTileToLastCoordsTile:
ld hl, OBJECT_MAP_X
add hl, bc
ld a, [hl]
ld hl, OBJECT_LAST_MAP_X
add hl, bc
ld [hl], a
ld hl, OBJECT_MAP_Y
add hl, bc
ld a, [hl]
ld hl, OBJECT_LAST_MAP_Y
add hl, bc
ld [hl], a
ld hl, OBJECT_TILE_COLLISION
add hl, bc
ld a, [hl]
ld hl, OBJECT_LAST_TILE
add hl, bc
ld [hl], a
call SetTallGrassFlags
ld hl, OBJECT_TILE_COLLISION
add hl, bc
ld a, [hl]
call UselessAndA
ret
CopyLastCoordsToCoords:
ld hl, OBJECT_LAST_MAP_X
add hl, bc
ld a, [hl]
ld hl, OBJECT_MAP_X
add hl, bc
ld [hl], a
ld hl, OBJECT_LAST_MAP_Y
add hl, bc
ld a, [hl]
ld hl, OBJECT_MAP_Y
add hl, bc
ld [hl], a
ret
UpdateTallGrassFlags:
ld hl, OBJECT_FLAGS2
add hl, bc
bit OVERHEAD_F, [hl]
jr z, .ok
ld hl, OBJECT_TILE_COLLISION
add hl, bc
ld a, [hl]
call SetTallGrassFlags
.ok
ld hl, OBJECT_TILE_COLLISION
add hl, bc
ld a, [hl]
call UselessAndA
ret c ; never happens
ld hl, OBJECT_LAST_TILE
add hl, bc
ld a, [hl]
call UselessAndA
ret
SetTallGrassFlags:
call CheckSuperTallGrassTile
jr z, .set
call CheckGrassTile
jr c, .reset
.set
ld hl, OBJECT_FLAGS2
add hl, bc
set OVERHEAD_F, [hl]
ret
.reset
ld hl, OBJECT_FLAGS2
add hl, bc
res OVERHEAD_F, [hl]
ret
UselessAndA:
and a
ret
EndSpriteMovement:
xor a
ld hl, OBJECT_STEP_FRAME
add hl, bc
ld [hl], a
ld hl, OBJECT_MOVEMENT_INDEX
add hl, bc
ld [hli], a
ld [hli], a ; OBJECT_STEP_INDEX
ld [hli], a ; OBJECT_1D
ld [hl], a ; OBJECT_1E
ld hl, OBJECT_WALKING
add hl, bc
ld [hl], STANDING
ret
InitStep:
ld hl, OBJECT_WALKING
add hl, bc
ld [hl], a
ld hl, OBJECT_FLAGS1
add hl, bc
bit FIXED_FACING_F, [hl]
jr nz, GetNextTile
add a
add a
and %00001100
ld hl, OBJECT_DIRECTION
add hl, bc
ld [hl], a
; fallthrough
GetNextTile:
call GetStepVector
ld hl, OBJECT_STEP_DURATION
add hl, bc
ld [hl], a
ld a, d
call GetStepVectorSign
ld hl, OBJECT_LAST_MAP_X
add hl, bc
add [hl]
ld hl, OBJECT_MAP_X
add hl, bc
ld [hl], a
ld d, a
ld a, e
call GetStepVectorSign
ld hl, OBJECT_LAST_MAP_Y
add hl, bc
add [hl]
ld hl, OBJECT_MAP_Y
add hl, bc
ld [hl], a
ld e, a
push bc
call GetCoordTileCollision
pop bc
ld hl, OBJECT_TILE_COLLISION
add hl, bc
ld [hl], a
ret
AddStepVector:
call GetStepVector
ld hl, OBJECT_SPRITE_X
add hl, bc
ld a, [hl]
add d
ld [hl], a
ld hl, OBJECT_SPRITE_Y
add hl, bc
ld a, [hl]
add e
ld [hl], a
ret
GetStepVector:
; Return (x, y, duration, speed) in (d, e, a, h).
ld hl, OBJECT_WALKING
add hl, bc
ld a, [hl]
and %00001111
add a
add a
ld l, a
ld h, 0
ld de, StepVectors
add hl, de
ld d, [hl]
inc hl
ld e, [hl]
inc hl
ld a, [hli]
ld h, [hl]
ret
StepVectors:
; x, y, duration, speed
; slow
db 0, 1, 16, 1
db 0, -1, 16, 1
db -1, 0, 16, 1
db 1, 0, 16, 1
; normal
db 0, 2, 8, 2
db 0, -2, 8, 2
db -2, 0, 8, 2
db 2, 0, 8, 2
; fast
db 0, 4, 4, 4
db 0, -4, 4, 4
db -4, 0, 4, 4
db 4, 0, 4, 4
GetStepVectorSign:
add a
ret z ; 0 or 128 (-128)
ld a, 1
ret nc ; +1 to +127
ld a, -1
ret ; -127 to -1
UpdatePlayerStep:
ld hl, OBJECT_WALKING
add hl, bc
ld a, [hl]
and %00000011
ld [wPlayerStepDirection], a
call AddStepVector
ld a, [wPlayerStepVectorX]
add d
ld [wPlayerStepVectorX], a
ld a, [wPlayerStepVectorY]
add e
ld [wPlayerStepVectorY], a
ld hl, wPlayerStepFlags
set PLAYERSTEP_CONTINUE_F, [hl]
ret
GetMapObjectField: ; unreferenced
push bc
ld e, a
ld d, 0
ld hl, OBJECT_MAP_OBJECT_INDEX
add hl, bc
ld a, [hl]
call GetMapObject
add hl, de
ld a, [hl]
pop bc
ret
RestoreDefaultMovement:
ld hl, OBJECT_MAP_OBJECT_INDEX
add hl, bc
ld a, [hl]
cp -1
jr z, .ok
push bc
call GetMapObject
ld hl, MAPOBJECT_MOVEMENT
add hl, bc
ld a, [hl]
pop bc
ret
.ok
ld a, SPRITEMOVEDATA_STANDING_DOWN
ret
ObjectMovement_ZeroAnonJumptableIndex: ; unreferenced
ld hl, OBJECT_MOVEMENT_INDEX
add hl, bc
ld [hl], 0
ret
ObjectMovement_IncAnonJumptableIndex:
ld hl, OBJECT_MOVEMENT_INDEX
add hl, bc
inc [hl]
ret
ObjectMovement_DecAnonJumptableIndex:
ld hl, OBJECT_MOVEMENT_INDEX
add hl, bc
dec [hl]
ret
ObjectMovement_AnonJumptable:
ld hl, OBJECT_MOVEMENT_INDEX
add hl, bc
ld a, [hl]
pop hl
rst JumpTable
ret
ObjectStep_ZeroAnonJumptableIndex:
ld hl, OBJECT_STEP_INDEX
add hl, bc
ld [hl], 0
ret
ObjectStep_IncAnonJumptableIndex:
ld hl, OBJECT_STEP_INDEX
add hl, bc
inc [hl]
ret
ObjectStep_AnonJumptable:
ld hl, OBJECT_STEP_INDEX
add hl, bc
ld a, [hl]
pop hl
rst JumpTable
ret
ObjectStep_GetAnonJumptableIndex: ; unreferenced
ld hl, OBJECT_STEP_INDEX
add hl, bc
ld a, [hl]
ret
ObjectStep_SetAnonJumptableIndex: ; unreferenced
ld hl, OBJECT_STEP_INDEX
add hl, bc
ld [hl], a
ret
StepFunction_Reset:
ld hl, OBJECT_MAP_X
add hl, bc
ld d, [hl]
ld hl, OBJECT_MAP_Y
add hl, bc
ld e, [hl]
push bc
call GetCoordTileCollision
pop bc
ld hl, OBJECT_TILE_COLLISION
add hl, bc
ld [hl], a
call CopyCoordsTileToLastCoordsTile
call EndSpriteMovement
ld hl, OBJECT_STEP_TYPE
add hl, bc
ld [hl], STEP_TYPE_FROM_MOVEMENT
ret
StepFunction_FromMovement:
call ObjectStep_ZeroAnonJumptableIndex
call GetSpriteMovementFunction
ld a, [hl]
ld hl, .Pointers
rst JumpTable
ret
.Pointers:
; entries correspond to SPRITEMOVEFN_* constants (see constants/map_object_constants.asm)
table_width 2
dw MovementFunction_Null ; 00
dw MovementFunction_RandomWalkY ; 01
dw MovementFunction_RandomWalkX ; 02
dw MovementFunction_RandomWalkXY ; 03
dw MovementFunction_RandomSpinSlow ; 04
dw MovementFunction_RandomSpinFast ; 05
dw MovementFunction_Standing ; 06
dw MovementFunction_ObeyDPad ; 07
dw MovementFunction_Indexed1 ; 08
dw MovementFunction_Indexed2 ; 09
dw MovementFunction_0a ; 0a
dw MovementFunction_0b ; 0b
dw MovementFunction_0c ; 0c
dw MovementFunction_0d ; 0d
dw MovementFunction_0e ; 0e
dw MovementFunction_Follow ; 0f
dw MovementFunction_Script ; 10
dw MovementFunction_Strength ; 11
dw MovementFunction_FollowNotExact ; 12
dw MovementFunction_Shadow ; 13
dw MovementFunction_Emote ; 14
dw MovementFunction_BigStanding ; 15
dw MovementFunction_Bouncing ; 16
dw MovementFunction_ScreenShake ; 17
dw MovementFunction_SpinClockwise ; 18
dw MovementFunction_SpinCounterclockwise ; 19
dw MovementFunction_BoulderDust ; 1a
dw MovementFunction_ShakingGrass ; 1b
assert_table_length NUM_SPRITEMOVEFN
MovementFunction_Null:
ret
MovementFunction_RandomWalkY:
call Random
ldh a, [hRandomAdd]
and %00000001
jp _RandomWalkContinue
MovementFunction_RandomWalkX:
call Random
ldh a, [hRandomAdd]
and %00000001
or %00000010
jp _RandomWalkContinue
MovementFunction_RandomWalkXY:
call Random
ldh a, [hRandomAdd]
and %00000011
jp _RandomWalkContinue
MovementFunction_RandomSpinSlow:
call Random
ldh a, [hRandomAdd]
and %00001100
ld hl, OBJECT_DIRECTION
add hl, bc
ld [hl], a
jp RandomStepDuration_Slow
MovementFunction_RandomSpinFast:
ld hl, OBJECT_DIRECTION
add hl, bc
ld a, [hl]
and %00001100
ld d, a
call Random
ldh a, [hRandomAdd]
and %00001100
cp d
jr nz, .keep
xor %00001100
.keep
ld [hl], a
jp RandomStepDuration_Fast
MovementFunction_Standing:
call CopyLastCoordsToCoords
call EndSpriteMovement
ld hl, OBJECT_ACTION
add hl, bc
ld [hl], OBJECT_ACTION_STAND
ld hl, OBJECT_STEP_TYPE
add hl, bc
ld [hl], STEP_TYPE_RESTORE
ret
MovementFunction_ObeyDPad:
ld hl, GetPlayerNextMovementIndex
jp HandleMovementData
MovementFunction_Indexed1:
ld hl, GetIndexedMovementIndex1
jp HandleMovementData
MovementFunction_Indexed2:
ld hl, GetIndexedMovementIndex2
jp HandleMovementData
MovementFunction_0a:
jp _GetMovementObject
MovementFunction_0b:
jp _GetMovementObject
MovementFunction_0c:
jp _GetMovementObject
MovementFunction_0d:
ld hl, GetPlayerNextMovementIndex
jp HandleMovementData
MovementFunction_0e:
jp _GetMovementObject
MovementFunction_Follow:
ld hl, GetFollowerNextMovementIndex
jp HandleMovementData
MovementFunction_Script:
ld hl, GetMovementIndex
jp HandleMovementData
MovementFunction_Strength:
call ObjectMovement_AnonJumptable
.anon_dw
dw .start
dw .stop
.start:
ld hl, OBJECT_TILE_COLLISION
add hl, bc
ld a, [hl]
call CheckPitTile
jr z, .on_pit
ld hl, OBJECT_FLAGS2
add hl, bc
bit BOULDER_MOVING_F, [hl]
res BOULDER_MOVING_F, [hl]
jr z, .ok
ld hl, OBJECT_RANGE
add hl, bc
ld a, [hl]
and %00000011
or 0
call InitStep
call CanObjectMoveInDirection
jr c, .ok2
ld de, SFX_STRENGTH
call PlaySFX
call SpawnStrengthBoulderDust
call UpdateTallGrassFlags
ld hl, OBJECT_STEP_TYPE
add hl, bc
ld [hl], STEP_TYPE_STRENGTH_BOULDER
ret
.ok2
call CopyLastCoordsToCoords
.ok
ld hl, OBJECT_WALKING
add hl, bc
ld [hl], STANDING
ret
.on_pit
call ObjectMovement_IncAnonJumptableIndex
.stop:
ld hl, OBJECT_WALKING
add hl, bc
ld [hl], STANDING
ret
MovementFunction_FollowNotExact:
ld hl, OBJECT_MAP_X
add hl, bc
ld d, [hl]
ld hl, OBJECT_MAP_Y
add hl, bc
ld e, [hl]
ld hl, OBJECT_RANGE
add hl, bc
ld a, [hl]
push bc
call GetObjectStruct
ld hl, OBJECT_WALKING
add hl, bc
ld a, [hl]
cp STANDING
jr z, .standing
ld hl, OBJECT_LAST_MAP_X
add hl, bc
ld a, [hl]
cp d
jr z, .equal
jr c, .less
ld a, 3
jr .done
.less
ld a, 2
jr .done
.equal
ld hl, OBJECT_LAST_MAP_Y
add hl, bc
ld a, [hl]
cp e
jr z, .standing
jr c, .less2
ld a, 0
jr .done
.less2
ld a, 1
.done
ld d, a
ld hl, OBJECT_WALKING
add hl, bc
ld a, [hl]
and %00001100
or d
pop bc
jp NormalStep
.standing
pop bc
ld hl, OBJECT_WALKING
add hl, bc
ld [hl], STANDING
ld hl, OBJECT_ACTION
add hl, bc
ld [hl], OBJECT_ACTION_STAND
ret
MovementFunction_BigStanding:
call EndSpriteMovement
ld hl, OBJECT_WALKING
add hl, bc
ld [hl], STANDING
ld hl, OBJECT_ACTION
add hl, bc
ld [hl], OBJECT_ACTION_BIG_DOLL_SYM
ld hl, OBJECT_STEP_TYPE
add hl, bc
ld [hl], STEP_TYPE_STANDING
ret
MovementFunction_Bouncing:
call EndSpriteMovement
ld hl, OBJECT_WALKING
add hl, bc
ld [hl], STANDING
ld hl, OBJECT_ACTION
add hl, bc
ld [hl], OBJECT_ACTION_BOUNCE
ld hl, OBJECT_STEP_TYPE
add hl, bc
ld [hl], STEP_TYPE_STANDING
ret
MovementFunction_SpinCounterclockwise:
call ObjectMovement_AnonJumptable
.anon_dw
dw _MovementSpinInit
dw _MovementSpinRepeat
dw _MovementSpinTurnLeft
MovementFunction_SpinClockwise:
call ObjectMovement_AnonJumptable
.anon_dw
dw _MovementSpinInit
dw _MovementSpinRepeat
dw _MovementSpinTurnRight
_MovementSpinInit:
call EndSpriteMovement
call ObjectMovement_IncAnonJumptableIndex
; fallthrough
_MovementSpinRepeat:
ld hl, OBJECT_ACTION
add hl, bc
ld [hl], OBJECT_ACTION_STAND
ld hl, OBJECT_RANGE
add hl, bc
ld a, [hl]
ld a, $10
ld hl, OBJECT_STEP_DURATION
add hl, bc
ld [hl], a
ld hl, OBJECT_STEP_TYPE
add hl, bc
ld [hl], STEP_TYPE_SLEEP
call ObjectMovement_IncAnonJumptableIndex
ret
_MovementSpinTurnLeft:
ld de, .facings_counterclockwise
call _MovementSpinNextFacing
jr MovementFunction_SpinCounterclockwise
.facings_counterclockwise:
db OW_RIGHT
db OW_LEFT
db OW_DOWN
db OW_UP
_MovementSpinTurnRight:
ld de, .facings_clockwise
call _MovementSpinNextFacing
jr MovementFunction_SpinClockwise
.facings_clockwise:
db OW_LEFT
db OW_RIGHT
db OW_UP
db OW_DOWN
_MovementSpinNextFacing:
ld hl, OBJECT_DIRECTION
add hl, bc
ld a, [hl]
and %00001100
rrca
rrca
push hl
ld l, a
ld h, 0
add hl, de
ld a, [hl]
pop hl
ld [hl], a
call ObjectMovement_DecAnonJumptableIndex
ret
MovementFunction_Shadow:
call InitMovementField1dField1e
ld hl, OBJECT_ACTION
add hl, bc
ld [hl], OBJECT_ACTION_SHADOW
ld hl, OBJECT_STEP_DURATION
add hl, de
ld a, [hl]
inc a
add a
add 0
ld hl, OBJECT_STEP_DURATION
add hl, bc
ld [hl], a
ld hl, OBJECT_WALKING
add hl, de
ld a, [hl]
maskbits NUM_DIRECTIONS
ld d, 1 * TILE_WIDTH + 6
cp DOWN
jr z, .ok
cp UP
jr z, .ok
ld d, 1 * TILE_WIDTH + 4
.ok
ld hl, OBJECT_SPRITE_Y_OFFSET
add hl, bc
ld [hl], d
ld hl, OBJECT_SPRITE_X_OFFSET
add hl, bc
ld [hl], 0
ld hl, OBJECT_STEP_TYPE
add hl, bc
ld [hl], STEP_TYPE_TRACKING_OBJECT
ret
MovementFunction_Emote:
call EndSpriteMovement
call InitMovementField1dField1e
ld hl, OBJECT_ACTION
add hl, bc
ld [hl], OBJECT_ACTION_EMOTE
ld hl, OBJECT_STEP_DURATION
add hl, bc
ld [hl], 0
ld hl, OBJECT_SPRITE_Y_OFFSET
add hl, bc
ld [hl], -2 * TILE_WIDTH
ld hl, OBJECT_SPRITE_X_OFFSET
add hl, bc
ld [hl], 0
ld hl, OBJECT_STEP_TYPE
add hl, bc
ld [hl], STEP_TYPE_TRACKING_OBJECT
ret
MovementFunction_BoulderDust:
call EndSpriteMovement
call InitMovementField1dField1e
ld hl, OBJECT_ACTION
add hl, bc
ld [hl], OBJECT_ACTION_BOULDER_DUST
ld hl, OBJECT_STEP_DURATION
add hl, de
ld a, [hl]
inc a
add a
ld hl, OBJECT_STEP_DURATION
add hl, bc
ld [hl], a
ld hl, OBJECT_WALKING
add hl, de
ld a, [hl]
and %00000011
ld e, a
ld d, 0
ld hl, .dust_coords
add hl, de
add hl, de
ld d, [hl]
inc hl
ld e, [hl]
ld hl, OBJECT_SPRITE_X_OFFSET
add hl, bc
ld [hl], d
ld hl, OBJECT_SPRITE_Y_OFFSET
add hl, bc
ld [hl], e
ld hl, OBJECT_STEP_TYPE
add hl, bc
ld [hl], STEP_TYPE_TRACKING_OBJECT
ret
.dust_coords:
; x, y
db 0, -4
db 0, 8
db 6, 2
db -6, 2
MovementFunction_ShakingGrass:
call EndSpriteMovement
call InitMovementField1dField1e
ld hl, OBJECT_ACTION
add hl, bc
ld [hl], OBJECT_ACTION_GRASS_SHAKE
ld hl, OBJECT_STEP_DURATION
add hl, de
ld a, [hl]
add -1
ld hl, OBJECT_STEP_DURATION
add hl, bc
ld [hl], a
ld hl, OBJECT_STEP_TYPE
add hl, bc
ld [hl], STEP_TYPE_TRACKING_OBJECT
ret
InitMovementField1dField1e:
ld hl, OBJECT_RANGE
add hl, bc
ld a, [hl]
push bc
call GetObjectStruct
ld d, b
ld e, c
pop bc
ld hl, OBJECT_1D
add hl, bc
ld [hl], e
inc hl ; OBJECT_1E
ld [hl], d
ret
MovementFunction_ScreenShake:
call EndSpriteMovement