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synced 2024-11-16 11:27:33 -08:00
955 lines
15 KiB
NASM
955 lines
15 KiB
NASM
DoPlayerMovement::
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call .GetDPad
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ld a, movement_step_sleep
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ld [wMovementAnimation], a
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xor a
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ld [wWalkingIntoEdgeWarp], a
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call .TranslateIntoMovement
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ld c, a
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ld a, [wMovementAnimation]
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ld [wPlayerNextMovement], a
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ret
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.GetDPad:
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ldh a, [hCurBoardEvent]
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cp BOARDEVENT_HANDLE_BOARD
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jr nz, .not_auto_in_board
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; compute direction according to space layout and save to wCurInput
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farcall StepTowardsNextSpace
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ret
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.not_auto_in_board
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ldh a, [hJoyDown]
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ld [wCurInput], a
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; ignore standing downhill if in View Map mode
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ldh a, [hCurBoardEvent]
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cp BOARDEVENT_VIEW_MAP_MODE
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ret z
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; Otherwise, standing downhill instead moves down.
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ld hl, wBikeFlags
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bit BIKEFLAGS_DOWNHILL_F, [hl]
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ret z
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ld c, a
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and D_PAD
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ret nz
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ld a, c
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or D_DOWN
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ld [wCurInput], a
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ret
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.TranslateIntoMovement:
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ldh a, [hCurBoardEvent]
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cp BOARDEVENT_VIEW_MAP_MODE
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jp z, .ViewMapMode
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ld a, [wPlayerState]
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cp PLAYER_NORMAL
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jr z, .Normal
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cp PLAYER_SURF
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jr z, .Surf
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cp PLAYER_SURF_PIKA
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jr z, .Surf
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cp PLAYER_BIKE
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jr z, .Normal
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cp PLAYER_SKATE
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jr z, .Ice
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.Normal:
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call .CheckForced
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call .GetAction
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call .CheckTile
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ret c
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call .CheckTurning
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ret c
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call .TryStep
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ret c
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call .TryJump
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ret c
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call .CheckWarp
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ret c
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jr .NotMoving
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.Surf:
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call .CheckForced
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call .GetAction
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call .CheckTile
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ret c
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call .CheckTurning
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ret c
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call .TrySurf
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ret c
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jr .NotMoving
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.Ice:
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call .CheckForced
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call .GetAction
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call .CheckTile
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ret c
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call .CheckTurning
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ret c
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call .TryStep
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ret c
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call .TryJump
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ret c
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call .CheckWarp
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ret c
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ld a, [wWalkingDirection]
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cp STANDING
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jr z, .HitWall
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call .BumpSound
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.HitWall:
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call .StandInPlace
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xor a
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ret
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.NotMoving:
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ld a, [wWalkingDirection]
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cp STANDING
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jr z, .Standing
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; Walking into an edge warp won't bump.
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ld a, [wWalkingIntoEdgeWarp]
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and a
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jr nz, .CantMove
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call .BumpSound
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.CantMove:
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call ._WalkInPlace
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xor a
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ret
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.Standing:
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call .StandInPlace
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xor a
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ret
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.BumpSound:
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call CheckSFX
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ret c
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ld de, SFX_BUMP
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call PlaySFX
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ret
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.ViewMapMode:
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; if View Map mode, ignore regular collisions but account for going off-limits or off-range
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call .GetAction
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call .ViewMapMode_CheckCollision
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; perform a normal step (Stand in place if wWalkingDirection is STANDING)
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ld a, STEP_WALK
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call .DoStep
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scf
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ret
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.ViewMapMode_CheckCollision:
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; return STANDING into wWalkingDirection if trying to walk
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; off-limits (unless there is a connected map) or off-range
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; as wTileDown, wTileUp, wTileLeft, and wTileRight are not used in this mode,
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; they are borrowed in order to signal valid directions to InitSecondarySprites
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xor a
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ld hl, wTileDown
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ld [hli], a
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ld [hli], a ; wTileUp
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ld [hli], a ; wTileLeft
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ld [hl], a ; wTileRight
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ld hl, wYCoord
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ld de, wMapHeight
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ld bc, wSouthConnectedMapGroup
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ld a, DOWN
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call .ViewMapMode_CheckDirectionOffLimits
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ld hl, wYCoord
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ld de, .TopLimit
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ld bc, wNorthConnectedMapGroup
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ld a, UP
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call .ViewMapMode_CheckDirectionOffLimits
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ld hl, wXCoord
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ld de, wMapWidth
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ld bc, wEastConnectedMapGroup
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ld a, RIGHT
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call .ViewMapMode_CheckDirectionOffLimits
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ld hl, wXCoord
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ld de, .LeftLimit
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ld bc, wWestConnectedMapGroup
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ld a, LEFT
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call .ViewMapMode_CheckDirectionOffLimits
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; now check in which directions the player would be walking off-range
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ld hl, wViewMapModeRange
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ld de, wViewMapModeDisplacementY
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ld bc, wTileDown
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ld a, [de]
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cp [hl]
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jr nz, .next1
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ld a, $ff
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ld [bc], a
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.next1
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inc bc ; wTileUp
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ld a, [de]
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xor $ff
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inc a
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cp [hl]
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jr nz, .next2
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ld a, $ff
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ld [bc], a
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.next2
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ld de, wViewMapModeDisplacementX
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inc bc ; wTileLeft
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ld a, [de]
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xor $ff
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inc a
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cp [hl]
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jr nz, .next3
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ld a, $ff
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ld [bc], a
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.next3
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inc bc ; wTileRight
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ld a, [de]
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cp [hl]
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jr nz, .next4
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ld a, $ff
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ld [bc], a
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.next4
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; finally return STANDING into wWalkingDirection in the current direction at
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; wWalkingDirection has had its corresponding wTile* address set to $ff.
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ld a, [wWalkingDirection]
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cp STANDING
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ret z
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ld hl, wTileDown
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ld c, a
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ld b, 0
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add hl, bc
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ld a, [hl]
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inc a ; cp $ff
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ret nz
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ld a, STANDING
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ld [wWalkingDirection], a
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ret
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.TopLimit:
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.LeftLimit:
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db 0
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; check if player would be walking off-limits in this direction
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.ViewMapMode_CheckDirectionOffLimits:
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push af
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ld a, [bc] ; connected map group
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inc a
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jr nz, .valid ; it's ok if there's any connected map in this direction
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ld a, [de] ; map dimension size (in metatiles), or 0 if moving up/left
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add a
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and a
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jr z, .ok
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dec a ; if e.g. size is 0x10, limit is at coord=0x1f
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.ok
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cp [hl] ; player coord (in half-metatiles)
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jr nz, .valid
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; not valid: set wTile* to $ff
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pop af
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ld hl, wTileDown
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ld c, a
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ld b, 0
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add hl, bc
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ld [hl], $ff
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ret
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.valid
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pop af
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ret
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.CheckTile:
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; Tiles such as waterfalls and warps move the player
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; in a given direction, overriding input.
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ld a, [wPlayerTile]
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ld c, a
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call CheckWhirlpoolTile
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jr c, .not_whirlpool
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ld a, PLAYERMOVEMENT_FORCE_TURN
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scf
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ret
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.not_whirlpool
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and $f0
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cp HI_NYBBLE_CURRENT
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jr z, .water
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cp HI_NYBBLE_WALK
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jr z, .land1
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cp HI_NYBBLE_WALK_ALT
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jr z, .land2
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cp HI_NYBBLE_WARPS
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jr z, .warps
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jr .no_walk
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.water
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ld a, c
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maskbits NUM_DIRECTIONS
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ld c, a
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ld b, 0
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ld hl, .water_table
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add hl, bc
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ld a, [hl]
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ld [wWalkingDirection], a
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jr .continue_walk
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.water_table
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db RIGHT ; COLL_WATERFALL_RIGHT
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db LEFT ; COLL_WATERFALL_LEFT
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db UP ; COLL_WATERFALL_UP
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db DOWN ; COLL_WATERFALL
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.land1
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ld a, c
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and 7
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ld c, a
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ld b, 0
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ld hl, .land1_table
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add hl, bc
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ld a, [hl]
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cp STANDING
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jr z, .no_walk
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ld [wWalkingDirection], a
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jr .continue_walk
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.land1_table
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db STANDING ; COLL_BRAKE
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db RIGHT ; COLL_WALK_RIGHT
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db LEFT ; COLL_WALK_LEFT
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db UP ; COLL_WALK_UP
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db DOWN ; COLL_WALK_DOWN
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db STANDING ; COLL_BRAKE_45
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db STANDING ; COLL_BRAKE_46
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db STANDING ; COLL_BRAKE_47
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.land2
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ld a, c
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and 7
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ld c, a
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ld b, 0
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ld hl, .land2_table
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add hl, bc
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ld a, [hl]
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cp STANDING
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jr z, .no_walk
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ld [wWalkingDirection], a
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jr .continue_walk
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.land2_table
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db RIGHT ; COLL_WALK_RIGHT_ALT
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db LEFT ; COLL_WALK_LEFT_ALT
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db UP ; COLL_WALK_UP_ALT
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db DOWN ; COLL_WALK_DOWN_ALT
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db STANDING ; COLL_BRAKE_ALT
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db STANDING ; COLL_BRAKE_55
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db STANDING ; COLL_BRAKE_56
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db STANDING ; COLL_BRAKE_57
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.warps
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ld a, c
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cp COLL_DOOR
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jr z, .down
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cp COLL_DOOR_79
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jr z, .down
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cp COLL_STAIRCASE
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jr z, .down
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cp COLL_CAVE
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jr nz, .no_walk
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.down
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ld a, DOWN
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ld [wWalkingDirection], a
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jr .continue_walk
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.no_walk
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xor a
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ret
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.continue_walk
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ld a, STEP_WALK
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call .DoStep
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ld a, PLAYERMOVEMENT_CONTINUE
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scf
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ret
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.CheckTurning:
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; If the player is turning, change direction first. This also lets
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; the player change facing without moving by tapping a direction.
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ld a, [wPlayerTurningDirection]
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cp 0
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jr nz, .not_turning
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ld a, [wWalkingDirection]
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cp STANDING
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jr z, .not_turning
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ld e, a
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ld a, [wPlayerDirection]
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rrca
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rrca
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maskbits NUM_DIRECTIONS
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cp e
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jr z, .not_turning
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ld a, STEP_TURN
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call .DoStep
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ld a, PLAYERMOVEMENT_TURN
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scf
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ret
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.not_turning
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xor a
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ret
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.TryStep:
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; Surfing actually calls .TrySurf directly instead of passing through here.
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ld a, [wPlayerState]
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cp PLAYER_SURF
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jr z, .TrySurf
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cp PLAYER_SURF_PIKA
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jr z, .TrySurf
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call .CheckLandPerms
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jr c, .bump
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call .CheckNPC
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and a
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jr z, .bump
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cp 2
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jr z, .bump
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ld a, [wPlayerTile]
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call CheckIceTile
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jr nc, .ice
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; Downhill riding is slower when not moving down.
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call .BikeCheck
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jr nz, .walk
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ld hl, wBikeFlags
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bit BIKEFLAGS_DOWNHILL_F, [hl]
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jr z, .fast
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ld a, [wWalkingDirection]
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cp DOWN
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jr z, .fast
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ld a, STEP_WALK
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call .DoStep
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scf
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ret
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.fast
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ld a, STEP_BIKE
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call .DoStep
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scf
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ret
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.walk
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ld a, STEP_WALK
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call .DoStep
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scf
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ret
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.ice
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ld a, STEP_ICE
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call .DoStep
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scf
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ret
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.bump
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xor a
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ret
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.TrySurf:
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call .CheckSurfPerms
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ld [wWalkingIntoLand], a
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jr c, .surf_bump
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call .CheckNPC
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ld [wWalkingIntoNPC], a
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and a
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jr z, .surf_bump
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cp 2
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jr z, .surf_bump
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ld a, [wWalkingIntoLand]
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and a
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jr nz, .ExitWater
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ld a, STEP_WALK
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call .DoStep
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scf
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ret
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.ExitWater:
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call .GetOutOfWater
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call PlayMapMusic
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ld a, STEP_WALK
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call .DoStep
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ld a, PLAYERMOVEMENT_EXIT_WATER
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scf
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ret
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.surf_bump
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xor a
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ret
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.TryJump:
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ld a, [wPlayerTile]
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ld e, a
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and $f0
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cp HI_NYBBLE_LEDGES
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jr nz, .DontJump
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ld a, e
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and 7
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ld e, a
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ld d, 0
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ld hl, .ledge_table
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add hl, de
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ld a, [wFacingDirection]
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and [hl]
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jr z, .DontJump
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ld de, SFX_JUMP_OVER_LEDGE
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call PlaySFX
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ld a, STEP_LEDGE
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call .DoStep
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ld a, PLAYERMOVEMENT_JUMP
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scf
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ret
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.DontJump:
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xor a
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ret
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.ledge_table
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db FACE_RIGHT ; COLL_HOP_RIGHT
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db FACE_LEFT ; COLL_HOP_LEFT
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db FACE_UP ; COLL_HOP_UP
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db FACE_DOWN ; COLL_HOP_DOWN
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db FACE_RIGHT | FACE_DOWN ; COLL_HOP_DOWN_RIGHT
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db FACE_DOWN | FACE_LEFT ; COLL_HOP_DOWN_LEFT
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db FACE_UP | FACE_RIGHT ; COLL_HOP_UP_RIGHT
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db FACE_UP | FACE_LEFT ; COLL_HOP_UP_LEFT
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.CheckWarp:
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ld a, [wWalkingDirection]
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cp STANDING
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jr z, .not_warp
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ld e, a
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ld d, 0
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ld hl, .EdgeWarps
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add hl, de
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ld a, [wPlayerTile]
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cp [hl]
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jr nz, .not_warp
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ld a, TRUE
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ld [wWalkingIntoEdgeWarp], a
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ld a, [wWalkingDirection]
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ld e, a
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ld a, [wPlayerDirection]
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rrca
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rrca
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maskbits NUM_DIRECTIONS
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cp e
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jr nz, .not_warp
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call WarpCheck
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jr nc, .not_warp
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call .StandInPlace
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scf
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ld a, PLAYERMOVEMENT_WARP
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ret
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.not_warp
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xor a ; PLAYERMOVEMENT_NORMAL
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ret
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.EdgeWarps:
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db COLL_WARP_CARPET_DOWN
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db COLL_WARP_CARPET_UP
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db COLL_WARP_CARPET_LEFT
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db COLL_WARP_CARPET_RIGHT
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.DoStep:
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ld e, a
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ld d, 0
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ld hl, .Steps
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add hl, de
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add hl, de
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ld a, [hli]
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ld h, [hl]
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ld l, a
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ld a, [wWalkingDirection]
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ld e, a
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cp STANDING
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jp z, .StandInPlace
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add hl, de
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ld a, [hl]
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ld [wMovementAnimation], a
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ld hl, .FinishFacing
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add hl, de
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ld a, [hl]
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ld [wPlayerTurningDirection], a
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ld a, PLAYERMOVEMENT_FINISH
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ret
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.Steps:
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; entries correspond to STEP_* constants (see constants/map_object_constants.asm)
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table_width 2, DoPlayerMovement.Steps
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|
dw .SlowStep
|
|
dw .NormalStep
|
|
dw .FastStep
|
|
dw .JumpStep
|
|
dw .SlideStep
|
|
dw .TurningStep
|
|
dw .BackJumpStep
|
|
dw .FinishFacing
|
|
assert_table_length NUM_STEPS
|
|
|
|
.SlowStep:
|
|
slow_step DOWN
|
|
slow_step UP
|
|
slow_step LEFT
|
|
slow_step RIGHT
|
|
.NormalStep:
|
|
step DOWN
|
|
step UP
|
|
step LEFT
|
|
step RIGHT
|
|
.FastStep:
|
|
big_step DOWN
|
|
big_step UP
|
|
big_step LEFT
|
|
big_step RIGHT
|
|
.JumpStep:
|
|
jump_step DOWN
|
|
jump_step UP
|
|
jump_step LEFT
|
|
jump_step RIGHT
|
|
.SlideStep:
|
|
fast_slide_step DOWN
|
|
fast_slide_step UP
|
|
fast_slide_step LEFT
|
|
fast_slide_step RIGHT
|
|
.BackJumpStep:
|
|
jump_step UP
|
|
jump_step DOWN
|
|
jump_step RIGHT
|
|
jump_step LEFT
|
|
.TurningStep:
|
|
turn_step DOWN
|
|
turn_step UP
|
|
turn_step LEFT
|
|
turn_step RIGHT
|
|
.FinishFacing:
|
|
db $80 | DOWN
|
|
db $80 | UP
|
|
db $80 | LEFT
|
|
db $80 | RIGHT
|
|
|
|
.StandInPlace:
|
|
ld a, 0
|
|
ld [wPlayerTurningDirection], a
|
|
ld a, movement_step_sleep
|
|
ld [wMovementAnimation], a
|
|
xor a
|
|
ret
|
|
|
|
._WalkInPlace:
|
|
ld a, 0
|
|
ld [wPlayerTurningDirection], a
|
|
ld a, movement_step_bump
|
|
ld [wMovementAnimation], a
|
|
xor a
|
|
ret
|
|
|
|
.CheckForced:
|
|
; When sliding on ice, input is forced to remain in the same direction.
|
|
|
|
call CheckStandingOnIce
|
|
ret nc
|
|
|
|
ld a, [wPlayerTurningDirection]
|
|
cp 0
|
|
ret z
|
|
|
|
maskbits NUM_DIRECTIONS
|
|
ld e, a
|
|
ld d, 0
|
|
ld hl, .forced_dpad
|
|
add hl, de
|
|
ld a, [wCurInput]
|
|
and BUTTONS
|
|
or [hl]
|
|
ld [wCurInput], a
|
|
ret
|
|
|
|
.forced_dpad
|
|
db D_DOWN, D_UP, D_LEFT, D_RIGHT
|
|
|
|
.GetAction:
|
|
; Poll player input and update movement info.
|
|
|
|
ld hl, .action_table
|
|
ld de, .action_table_1_end - .action_table_1
|
|
ld a, [wCurInput]
|
|
bit D_DOWN_F, a
|
|
jr nz, .d_down
|
|
bit D_UP_F, a
|
|
jr nz, .d_up
|
|
bit D_LEFT_F, a
|
|
jr nz, .d_left
|
|
bit D_RIGHT_F, a
|
|
jr nz, .d_right
|
|
; Standing
|
|
jr .update
|
|
|
|
.d_down
|
|
add hl, de
|
|
.d_up
|
|
add hl, de
|
|
.d_left
|
|
add hl, de
|
|
.d_right
|
|
add hl, de
|
|
.update
|
|
ld a, [hli]
|
|
ld [wWalkingDirection], a
|
|
ld a, [hli]
|
|
ld [wFacingDirection], a
|
|
ld a, [hli]
|
|
ld [wWalkingX], a
|
|
ld a, [hli]
|
|
ld [wWalkingY], a
|
|
ld a, [hli]
|
|
ld h, [hl]
|
|
ld l, a
|
|
ld a, [hl]
|
|
ld [wWalkingTile], a
|
|
ret
|
|
|
|
MACRO player_action
|
|
; walk direction, facing, x movement, y movement, tile collision pointer
|
|
db \1, \2, \3, \4
|
|
dw \5
|
|
ENDM
|
|
|
|
.action_table:
|
|
.action_table_1
|
|
player_action STANDING, FACE_CURRENT, 0, 0, wPlayerTile
|
|
.action_table_1_end
|
|
player_action RIGHT, FACE_RIGHT, 1, 0, wTileRight
|
|
player_action LEFT, FACE_LEFT, -1, 0, wTileLeft
|
|
player_action UP, FACE_UP, 0, -1, wTileUp
|
|
player_action DOWN, FACE_DOWN, 0, 1, wTileDown
|
|
|
|
.CheckNPC:
|
|
; Returns 0 if there is an NPC in front that you can't move
|
|
; Returns 1 if there is no NPC in front
|
|
; Returns 2 if there is a movable NPC in front. The game actually treats
|
|
; this the same as an NPC in front (bump).
|
|
ld a, 0
|
|
ldh [hMapObjectIndex], a
|
|
; Load the next X coordinate into d
|
|
ld a, [wPlayerMapX]
|
|
ld d, a
|
|
ld a, [wWalkingX]
|
|
add d
|
|
ld d, a
|
|
; Load the next Y coordinate into e
|
|
ld a, [wPlayerMapY]
|
|
ld e, a
|
|
ld a, [wWalkingY]
|
|
add e
|
|
ld e, a
|
|
; Find an object struct with coordinates equal to d,e
|
|
ld bc, wObjectStructs ; redundant
|
|
farcall IsNPCAtCoord
|
|
jr nc, .no_npc
|
|
call .CheckStrengthBoulder
|
|
jr c, .no_bump
|
|
|
|
xor a ; bump
|
|
ret
|
|
|
|
.no_npc
|
|
ld a, 1
|
|
ret
|
|
|
|
.no_bump
|
|
ld a, 2
|
|
ret
|
|
|
|
.CheckStrengthBoulder:
|
|
ld hl, wBikeFlags
|
|
bit BIKEFLAGS_STRENGTH_ACTIVE_F, [hl]
|
|
jr z, .not_boulder
|
|
|
|
ld hl, OBJECT_WALKING
|
|
add hl, bc
|
|
ld a, [hl]
|
|
cp STANDING
|
|
jr nz, .not_boulder
|
|
|
|
ld hl, OBJECT_PALETTE
|
|
add hl, bc
|
|
bit STRENGTH_BOULDER_F, [hl]
|
|
jr z, .not_boulder
|
|
|
|
ld hl, OBJECT_FLAGS2
|
|
add hl, bc
|
|
set 2, [hl]
|
|
|
|
ld a, [wWalkingDirection]
|
|
ld d, a
|
|
ld hl, OBJECT_RANGE
|
|
add hl, bc
|
|
ld a, [hl]
|
|
and %11111100
|
|
or d
|
|
ld [hl], a
|
|
|
|
scf
|
|
ret
|
|
|
|
.not_boulder
|
|
xor a
|
|
ret
|
|
|
|
.CheckLandPerms:
|
|
; Return 0 if walking onto land and tile permissions allow it.
|
|
; Otherwise, return carry.
|
|
|
|
ld a, [wTilePermissions]
|
|
ld d, a
|
|
ld a, [wFacingDirection]
|
|
and d
|
|
jr nz, .NotWalkable
|
|
|
|
ld a, [wWalkingTile]
|
|
call .CheckWalkable
|
|
jr c, .NotWalkable
|
|
|
|
xor a
|
|
ret
|
|
|
|
.NotWalkable:
|
|
scf
|
|
ret
|
|
|
|
.CheckSurfPerms:
|
|
; Return 0 if moving in water, or 1 if moving onto land.
|
|
; Otherwise, return carry.
|
|
|
|
ld a, [wTilePermissions]
|
|
ld d, a
|
|
ld a, [wFacingDirection]
|
|
and d
|
|
jr nz, .NotSurfable
|
|
|
|
ld a, [wWalkingTile]
|
|
call .CheckSurfable
|
|
jr c, .NotSurfable
|
|
|
|
and a
|
|
ret
|
|
|
|
.NotSurfable:
|
|
scf
|
|
ret
|
|
|
|
.BikeCheck:
|
|
ld a, [wPlayerState]
|
|
cp PLAYER_BIKE
|
|
ret z
|
|
cp PLAYER_SKATE
|
|
ret
|
|
|
|
.CheckWalkable:
|
|
; Return 0 if tile a is land. Otherwise, return carry.
|
|
|
|
call GetTileCollision
|
|
and a ; LAND_TILE
|
|
ret z
|
|
scf
|
|
ret
|
|
|
|
.CheckSurfable:
|
|
; Return 0 if tile a is water, or 1 if land.
|
|
; Otherwise, return carry.
|
|
|
|
call GetTileCollision
|
|
cp WATER_TILE
|
|
jr z, .Water
|
|
|
|
; Can walk back onto land from water.
|
|
and a ; LAND_TILE
|
|
jr z, .Land
|
|
|
|
jr .Neither
|
|
|
|
.Water:
|
|
xor a
|
|
ret
|
|
|
|
.Land:
|
|
ld a, 1
|
|
and a
|
|
ret
|
|
|
|
.Neither:
|
|
scf
|
|
ret
|
|
|
|
.GetOutOfWater:
|
|
push bc
|
|
ld a, PLAYER_NORMAL
|
|
ld [wPlayerState], a
|
|
call UpdatePlayerSprite ; UpdateSprites
|
|
pop bc
|
|
ret
|
|
|
|
CheckStandingOnIce::
|
|
ld a, [wPlayerTurningDirection]
|
|
cp 0
|
|
jr z, .not_ice
|
|
cp $f0
|
|
jr z, .not_ice
|
|
ld a, [wPlayerTile]
|
|
call CheckIceTile
|
|
jr nc, .yep
|
|
ld a, [wPlayerState]
|
|
cp PLAYER_SKATE
|
|
jr nz, .not_ice
|
|
|
|
.yep
|
|
scf
|
|
ret
|
|
|
|
.not_ice
|
|
and a
|
|
ret
|
|
|
|
StopPlayerForEvent::
|
|
ld hl, wPlayerNextMovement
|
|
ld a, movement_step_sleep
|
|
cp [hl]
|
|
ret z
|
|
|
|
ld [hl], a
|
|
ld a, 0
|
|
ld [wPlayerTurningDirection], a
|
|
ret
|