1494 lines
35 KiB
NASM
1494 lines
35 KiB
NASM
; =========================================================
|
|
; Minecart Sprite Properties
|
|
; =========================================================
|
|
|
|
!SPRID = $A3 ; The sprite ID you are overwriting (HEX)
|
|
!NbrTiles = 08 ; Number of tiles used in a frame
|
|
!Harmless = 01 ; 00 = Sprite is Harmful, 01 = Sprite is Harmless
|
|
!HVelocity = 00 ; Is your sprite going super fast? put 01 if it is
|
|
!Health = 00 ; Number of Health the sprite have
|
|
!Damage = 00 ; (08 is a whole heart), 04 is half heart
|
|
!DeathAnimation = 00 ; 00 = normal death, 01 = no death animation
|
|
!ImperviousAll = 01 ; 00 = Can be attack, 01 = attack will clink on it
|
|
!SmallShadow = 00 ; 01 = small shadow, 00 = no shadow
|
|
!Shadow = 00 ; 00 = don't draw shadow, 01 = draw a shadow
|
|
!Palette = 00 ; Unused in this template (can be 0 to 7)
|
|
!Hitbox = 14 ; 00 to 31, can be viewed in sprite draw tool
|
|
!Persist = 01 ; 01 = your sprite continue to live offscreen
|
|
!Statis = 00 ; 00 = is sprite is alive?, (kill all enemies room)
|
|
!CollisionLayer = 00 ; 01 = will check both layer for collision
|
|
!CanFall = 00 ; 01 sprite can fall in hole, 01 = can't fall
|
|
!DeflectArrow = 00 ; 01 = deflect arrows
|
|
!WaterSprite = 00 ; 01 = can only walk shallow water
|
|
!Blockable = 00 ; 01 = can be blocked by link's shield?
|
|
!Prize = 00 ; 00-15 = the prize pack the sprite will drop from
|
|
!Sound = 00 ; 01 = Play different sound when taking damage
|
|
!Interaction = 00 ; ?? No documentation
|
|
!Statue = 00 ; 01 = Sprite is statue
|
|
!DeflectProjectiles = 00 ; 01 = Sprite will deflect ALL projectiles
|
|
!ImperviousArrow = 00 ; 01 = Impervious to arrows
|
|
!ImpervSwordHammer = 00 ; 01 = Impervious to sword and hammer attacks
|
|
!Boss = 00 ; 00 = normal sprite, 01 = sprite is a boss
|
|
|
|
; =========================================================
|
|
|
|
%Set_Sprite_Properties(Sprite_Minecart_Prep, Sprite_Minecart_Long)
|
|
|
|
; =========================================================
|
|
|
|
; Link is in cart
|
|
!LinkInCart = $35
|
|
!MinecartSpeed = 20
|
|
!DoubleSpeed = 30
|
|
|
|
; nesw
|
|
; 0 - north
|
|
; 1 - east
|
|
; 2 - south
|
|
; 3 - west
|
|
!MinecartDirection = $012B
|
|
|
|
; $0DE0[0x10] - (Sprite) ;functions
|
|
; udlr
|
|
; 0 - up
|
|
; 1 - down
|
|
; 2 - left
|
|
; 3 - right
|
|
!SpriteDirection = $0DE0
|
|
|
|
; Bitfield for carry-related actions.
|
|
; .... ..tl
|
|
; t - tossing object
|
|
; l - lifting object
|
|
!LinkCarryOrToss = $0309
|
|
|
|
; =========================================================
|
|
|
|
Sprite_Minecart_Long:
|
|
{
|
|
PHB : PHK : PLB
|
|
|
|
JSR Sprite_Minecart_DrawTop ; Draws the top half behind Link
|
|
JSR Sprite_Minecart_DrawBottom ; Draw the bottom half in front of Link
|
|
JSL Sprite_CheckActive ; Check if game is not paused
|
|
BCC .SpriteIsNotActive ; Skip Main code is sprite is innactive
|
|
|
|
JSR Sprite_Minecart_Main ; Call the main sprite code
|
|
|
|
.SpriteIsNotActive
|
|
PLB ; Get back the databank we stored previously
|
|
RTL ; Go back to original code
|
|
}
|
|
|
|
; =========================================================
|
|
|
|
Sprite_Minecart_Prep:
|
|
{
|
|
PHB : PHK : PLB
|
|
STZ.w SprMiscG, X
|
|
; If the subtype is > 4, then it's a dummy cart
|
|
LDA SprSubtype, X : CMP.b #$04 : BCC .continue
|
|
LDA SprSubtype, X : SEC : SBC.b #$04 : STA SprSubtype, X
|
|
; If link is in a cart, then draw the dummy cart
|
|
|
|
LDA !LinkInCart : BNE .dummy_continue
|
|
; .clear_cart
|
|
STZ.w $0DD0, X ; Otherwise, clear the sprite
|
|
PLB
|
|
RTL
|
|
|
|
.continue
|
|
; Unused dummy cart code
|
|
; LDA.w !LinkInCart : AND.b #$FF : BEQ .dummy_continue
|
|
; JMP .clear_cart
|
|
.dummy_continue
|
|
|
|
LDA #$00 : STA $0CAA, X ; Sprite persist in dungeon
|
|
LDA #$04 : STA $0E40, X ; Nbr Oam Entries
|
|
LDA #$40 : STA $0E60, x ; Impervious props
|
|
LDA #$E0 : STA $0F60, X ; Persist
|
|
LDA #$00 : STA $0CD2, X ; No bump damage
|
|
LDA #$00 : STA $0B6B, X ; Set interactive hitbox?
|
|
|
|
STZ.w $012B
|
|
|
|
LDA SprSubtype, X : CMP.b #$00 : BEQ .north
|
|
CMP.b #$01 : BEQ .east
|
|
CMP.b #$02 : BEQ .south
|
|
CMP.b #$03 : BEQ .west
|
|
CMP.b #$04 : BEQ .north
|
|
CMP.b #$05 : BEQ .east
|
|
CMP.b #$06 : BEQ .south
|
|
CMP.b #$07 : BEQ .west
|
|
|
|
.north
|
|
STZ.w !MinecartDirection
|
|
%GotoAction(1) ; Minecart_WaitVert
|
|
JMP .done
|
|
.east
|
|
LDA #$01 : STA !MinecartDirection
|
|
%GotoAction(0) ; Minecart_WaitHoriz
|
|
JMP .done
|
|
.south
|
|
LDA #$02 : STA !MinecartDirection
|
|
%GotoAction(1) ; Minecart_WaitVert
|
|
JMP .done
|
|
.west
|
|
LDA #$03 : STA !MinecartDirection
|
|
%GotoAction(0) ; Minecart_WaitHoriz
|
|
|
|
.done
|
|
PLB
|
|
RTL
|
|
}
|
|
|
|
; =========================================================
|
|
|
|
macro HandlePlayerCamera()
|
|
LDA $22 : SEC : SBC $3F : STA $31
|
|
LDA $20 : SEC : SBC $3E : STA $30
|
|
PHX
|
|
|
|
JSL $07E6A6 ; Link_HandleMovingAnimation_FullLongEntry
|
|
JSL $07F42F ; HandleIndoorCameraAndDoors_Long
|
|
|
|
JSL Player_HaltDashAttack
|
|
PLX
|
|
endmacro
|
|
|
|
macro InitMovement()
|
|
LDA.b $22 : STA.b $3F
|
|
LDA.b $23 : STA.b $41
|
|
LDA.b $20 : STA.b $3E
|
|
LDA.b $21 : STA.b $40
|
|
endmacro
|
|
|
|
macro MoveCart()
|
|
JSR HandleTileDirections
|
|
JSR HandleDynamicSwitchTileDirections
|
|
LDA #$35 : STA $012E ; Cart SFX
|
|
endmacro
|
|
|
|
macro StopCart()
|
|
STZ $02F5
|
|
STZ.w SprYSpeed, X
|
|
STZ.w SprXSpeed, X
|
|
STZ.w !LinkInCart
|
|
endmacro
|
|
|
|
HandleLiftAndToss:
|
|
{
|
|
JSR CheckIfPlayerIsOn : BCC .not_tossing
|
|
LDA.w !LinkCarryOrToss : CMP.b #$02 : BNE .not_tossing
|
|
; Check links facing direction $2F and apply velocity
|
|
LDA $2F : CMP.b #$00 : BEQ .toss_north
|
|
CMP.b #$02 : BEQ .toss_south
|
|
CMP.b #$04 : BEQ .toss_east
|
|
CMP.b #$06 : BEQ .toss_west
|
|
.toss_north
|
|
LDA.b #-!DoubleSpeed : STA SprYSpeed, X
|
|
LDA #$00 : STA SprSubtype, X
|
|
LDA #$02 : STA !SpriteDirection, X
|
|
JMP .continue
|
|
.toss_south
|
|
LDA.b #!DoubleSpeed : STA SprYSpeed, X
|
|
LDA #$02 : STA SprSubtype, X
|
|
LDA #$01 : STA !SpriteDirection, X
|
|
JMP .continue
|
|
.toss_east
|
|
LDA.b #-!DoubleSpeed : STA SprXSpeed, X
|
|
LDA #$03 : STA SprSubtype, X
|
|
LDA #$02 : STA !SpriteDirection, X
|
|
JMP .continue
|
|
.toss_west
|
|
LDA.b #!DoubleSpeed : STA SprXSpeed, X
|
|
LDA #$03 : STA SprSubtype, X
|
|
LDA #$03 : STA !SpriteDirection, X
|
|
.continue
|
|
|
|
LDA #$01 : STA SprMiscG, X
|
|
LDA #$10 : STA SprTimerC, X
|
|
STA SprYRound, X : STA SprXRound, X
|
|
.not_tossing
|
|
JSL Sprite_CheckIfLifted
|
|
JSL Sprite_Move
|
|
RTS
|
|
}
|
|
|
|
HandleTossedCart:
|
|
{
|
|
LDA.w SprMiscG, X : BEQ .not_tossed
|
|
LDA.w SprHeight, X : BEQ .low_enough
|
|
DEC.w SprHeight, X
|
|
RTS
|
|
.low_enough
|
|
|
|
LDA.w SprTimerC, X : BNE .not_tossed
|
|
|
|
STZ.w SprMiscG, X
|
|
STZ.w SprYSpeed, X
|
|
STZ.w SprXSpeed, X
|
|
STZ.w SprHeight, X
|
|
.not_tossed
|
|
RTS
|
|
|
|
}
|
|
|
|
; =========================================================
|
|
|
|
Sprite_Minecart_Main:
|
|
{
|
|
LDA.w SprAction, X ; Load the SprAction
|
|
JSL UseImplicitRegIndexedLocalJumpTable ; Goto the SprAction
|
|
|
|
dw Minecart_WaitHoriz ; 0x00
|
|
dw Minecart_WaitVert ; 0x01
|
|
dw Minecart_MoveNorth ; 0x02
|
|
dw Minecart_MoveEast ; 0x03
|
|
dw Minecart_MoveSouth ; 0x04
|
|
dw Minecart_MoveWest ; 0x05
|
|
dw Minecart_Release ; 0x06
|
|
|
|
; -------------------------------------------------------
|
|
; 0x00
|
|
Minecart_WaitHoriz:
|
|
{
|
|
%PlayAnimation(0,1,8)
|
|
LDA SprTimerA, X : BNE .not_ready
|
|
LDA !LinkCarryOrToss : AND #$03 : BNE .lifting
|
|
JSR CheckIfPlayerIsOn : BCC .not_ready
|
|
LDA $F4 : AND.b #$80 : BEQ .not_ready ; Check for B button
|
|
|
|
JSL Player_HaltDashAttack ; Stop the player from dashing
|
|
LDA #$02 : STA $02F5 ; Somaria platform and moving
|
|
LDA $0FDA : SEC : SBC #$0B : STA $20 ; Adjust player pos
|
|
LDA #$01 : STA !LinkInCart ; Set Link in cart flag
|
|
|
|
; Check if the cart is facing east or west
|
|
LDA SprSubtype, X : CMP.b #$03 : BNE .opposite_direction
|
|
STA.w !MinecartDirection
|
|
LDA #$02 : STA !SpriteDirection, X
|
|
%GotoAction(5) ; Minecart_MoveWest
|
|
RTS
|
|
|
|
.opposite_direction
|
|
STA.w !MinecartDirection
|
|
LDA #$03 : STA !SpriteDirection, X
|
|
%GotoAction(3) ; Minecart_MoveEast
|
|
RTS
|
|
|
|
.not_ready
|
|
.lifting
|
|
JSR HandleLiftAndToss
|
|
JSR HandleTossedCart
|
|
RTS
|
|
}
|
|
|
|
; -------------------------------------------------------
|
|
; 0x01
|
|
Minecart_WaitVert:
|
|
{
|
|
%PlayAnimation(2,3,8)
|
|
LDA SprTimerA, X : BNE .not_ready
|
|
LDA !LinkCarryOrToss : AND #$03 : BNE .lifting
|
|
JSR CheckIfPlayerIsOn : BCC .not_ready
|
|
LDA $F4 : AND.b #$80 : BEQ .not_ready ; Check for B button
|
|
|
|
JSL Player_HaltDashAttack ; Stop the player from dashing
|
|
LDA #$02 : STA $02F5 ; Somaria platform and moving
|
|
LDA $0FDA : SEC : SBC #$0B : STA $20 ; Adjust player pos
|
|
LDA #$01 : STA !LinkInCart ; Set Link in cart flag
|
|
|
|
; Check if the cart is facing north or south
|
|
LDA SprSubtype, X : BEQ .opposite_direction
|
|
STA.w !MinecartDirection
|
|
LDA #$01 : STA !SpriteDirection, X
|
|
%GotoAction(4) ; Minecart_MoveSouth
|
|
RTS
|
|
|
|
.opposite_direction
|
|
STA.w !MinecartDirection
|
|
LDA #$00 : STA !SpriteDirection, X
|
|
%GotoAction(2) ; Minecart_MoveNorth
|
|
RTS
|
|
|
|
.not_ready
|
|
.lifting
|
|
JSR HandleLiftAndToss
|
|
JSR HandleTossedCart
|
|
|
|
RTS
|
|
}
|
|
|
|
; -------------------------------------------------------
|
|
; 0x02
|
|
Minecart_MoveNorth:
|
|
{
|
|
%PlayAnimation(2,3,8)
|
|
%InitMovement()
|
|
|
|
LDA $36 : BNE .fast_speed
|
|
LDA.b #-!MinecartSpeed : STA SprYSpeed, X
|
|
JMP .continue
|
|
.fast_speed
|
|
LDA.b #-!DoubleSpeed : STA SprYSpeed, X
|
|
.continue
|
|
JSL Sprite_MoveVert
|
|
JSL Sprite_BounceFromTileCollision
|
|
|
|
; Get direction of the cart (0 to 3)
|
|
LDY.w !SpriteDirection, X
|
|
JSL DragPlayer
|
|
JSR CheckForPlayerInput
|
|
%HandlePlayerCamera()
|
|
%MoveCart()
|
|
|
|
RTS
|
|
}
|
|
|
|
; -------------------------------------------------------
|
|
; 0x03
|
|
Minecart_MoveEast:
|
|
{
|
|
%PlayAnimation(0,1,8)
|
|
%InitMovement()
|
|
LDA $36 : BNE .fast_speed
|
|
LDA.b #!MinecartSpeed : STA $0D50, X
|
|
JMP .continue
|
|
.fast_speed
|
|
LDA.b #!DoubleSpeed : STA $0D50, X
|
|
.continue
|
|
JSL Sprite_MoveHoriz
|
|
JSL Sprite_BounceFromTileCollision
|
|
|
|
; Get direction of the cart (0 to 3)
|
|
LDY.w !SpriteDirection, X
|
|
JSL DragPlayer
|
|
JSR CheckForPlayerInput
|
|
%HandlePlayerCamera()
|
|
%MoveCart()
|
|
|
|
RTS
|
|
}
|
|
|
|
; -------------------------------------------------------
|
|
; 0x04
|
|
Minecart_MoveSouth:
|
|
{
|
|
%PlayAnimation(2,3,8)
|
|
%InitMovement()
|
|
LDA $36 : BNE .fast_speed
|
|
LDA.b #!MinecartSpeed : STA SprYSpeed, X
|
|
JMP .continue
|
|
.fast_speed
|
|
LDA.b #!DoubleSpeed : STA SprYSpeed, X
|
|
.continue
|
|
JSL Sprite_MoveVert
|
|
JSL Sprite_BounceFromTileCollision
|
|
|
|
; Get direction of the cart (0 to 3)
|
|
LDY.w !SpriteDirection, X
|
|
JSL DragPlayer
|
|
JSR CheckForPlayerInput
|
|
%HandlePlayerCamera()
|
|
%MoveCart()
|
|
|
|
RTS
|
|
}
|
|
|
|
; -------------------------------------------------------
|
|
; 0x05
|
|
Minecart_MoveWest:
|
|
{
|
|
%PlayAnimation(0,1,8)
|
|
%InitMovement()
|
|
LDA $36 : BNE .fast_speed
|
|
LDA.b #-!MinecartSpeed : STA $0D50, X
|
|
JMP .continue
|
|
.fast_speed
|
|
LDA.b #-!DoubleSpeed : STA $0D50, X
|
|
.continue
|
|
JSL Sprite_MoveHoriz
|
|
JSL Sprite_BounceFromTileCollision
|
|
|
|
; Get direction of the cart (0 to 3)
|
|
LDY.w !SpriteDirection, X
|
|
JSL DragPlayer
|
|
JSR CheckForPlayerInput
|
|
%HandlePlayerCamera()
|
|
%MoveCart()
|
|
|
|
RTS
|
|
}
|
|
|
|
|
|
; -------------------------------------------------------
|
|
; 0x06
|
|
Minecart_Release:
|
|
{
|
|
%StopCart()
|
|
|
|
LDA SprTimerD, X : BNE .not_ready
|
|
LDA #$40 : STA SprTimerA, X
|
|
%GotoAction(0)
|
|
.not_ready
|
|
RTS
|
|
}
|
|
}
|
|
|
|
; =========================================================
|
|
; The purpose of this routine is to determine the direction
|
|
; the sprite is facing and then adjust the X and Y positions
|
|
; of the tile interaction lookup based on that direction.
|
|
; If implemented correctly this would make sure the sprite
|
|
; stays centered on the tracks when it makes corner turns.
|
|
; Currently, depending on where the tile is placed the
|
|
; cart may make a turn too early and appear to be off center.
|
|
|
|
North = $00
|
|
East = $01
|
|
South = $02
|
|
West = $03
|
|
|
|
SetTileLookupPosBasedOnDirection:
|
|
{
|
|
; Based on the direction of the Minecart, adjust the
|
|
; lookup position to be in front of the sprite
|
|
LDA.w !MinecartDirection : CMP.b #$00 : BEQ .north
|
|
CMP.b #$01 : BEQ .east
|
|
CMP.b #$02 : BEQ .south
|
|
CMP.b #$03 : BEQ .west
|
|
|
|
.north
|
|
LDA.w SprY, X : SEC : SBC.b #$01 : STA.b $00
|
|
LDA.w SprX, X : STA.b $02
|
|
JMP .return
|
|
.east
|
|
LDA.w SprX, X : CLC : ADC.b #$01 : STA.b $03
|
|
LDA.w SprY, X : STA.b $00
|
|
JMP .return
|
|
.south
|
|
LDA.w SprY, X : SEC : SBC.b #$01 : STA.b $00
|
|
LDA.w SprX, X : STA.b $02
|
|
JMP .return
|
|
.west
|
|
LDA.w SprX, X : AND #$F8 : SEC : SBC.b #$01 : STA.b $03
|
|
LDA.w SprY, X : STA.b $00
|
|
|
|
.return
|
|
LDA.w SprYH, X : STA.b $01
|
|
LDA.w SprXH, X : STA.b $03
|
|
|
|
LDA.w SprX, X : STA $0FD8
|
|
LDA.w SprXH, X : STA $0FD9
|
|
LDA.w SprY, X : STA $0FDA
|
|
LDA.w SprYH, X : STA $0FDB
|
|
|
|
RTS
|
|
}
|
|
|
|
; =========================================================
|
|
|
|
print "HandleTileDirections ", pc
|
|
HandleTileDirections:
|
|
{
|
|
LDA SprTimerA, X : BEQ +
|
|
RTS
|
|
+
|
|
|
|
; Setup Minecart position to look for tile IDs
|
|
; We use AND #$F8 to clamp to a 16x16 grid, however this needs work.
|
|
LDA.w SprY, X : AND #$F8 : STA.b $00 : LDA.w SprYH, X : STA.b $01
|
|
LDA.w SprX, X : AND #$F8 : STA.b $02 : LDA.w SprXH, X : STA.b $03
|
|
|
|
; Fetch tile attributes based on current coordinates
|
|
LDA.b #$00 : JSL Sprite_GetTileAttr
|
|
|
|
; Load the tile index
|
|
LDA $0FA5 : CMP.b #$01 : BNE .not_out_of_bounds
|
|
|
|
; If the tile is out of bounds, release the cart
|
|
LDA #$40 : STA SprTimerD, X
|
|
%GotoAction(6) ; Minecart_Release
|
|
RTS
|
|
.out_of_bounds
|
|
JSR ClampSpritePositionToGrid
|
|
RTS
|
|
|
|
.not_out_of_bounds
|
|
; Check if the tile is a stop tile
|
|
CMP.b #$B7 : BCS .check_stop ; If tile ID is >= $B8, check for stop tiles
|
|
|
|
.check_stop
|
|
CMP.b #$B7 : BEQ .stop_north
|
|
CMP.b #$B8 : BEQ .stop_south
|
|
CMP.b #$B9 : BEQ .stop_west
|
|
CMP.b #$BA : BEQ .stop_east
|
|
CMP.b #$20 : BEQ .out_of_bounds
|
|
JMP .check_for_movement ; if none of the above, continue with normal logic
|
|
|
|
.stop_north
|
|
; Set the new direction to north and flip the cart's orientation
|
|
LDA.b #South : STA SprSubtype, X : STA.w !MinecartDirection
|
|
LDA #$01 : STA !SpriteDirection, X
|
|
JMP .go_vert
|
|
|
|
.stop_south
|
|
; Set the new direction to south and flip the cart's orientation
|
|
LDA.b #North : STA SprSubtype, X : STZ.w !MinecartDirection
|
|
LDA #$00 : STA !SpriteDirection, X
|
|
|
|
; -----------------------------------------------
|
|
.go_vert
|
|
%SetTimerA($40)
|
|
%StopCart()
|
|
%GotoAction(1) ; Minecart_WaitVert
|
|
JSL Player_ResetState
|
|
RTS
|
|
|
|
.stop_east
|
|
; Set the new direction to east and flip the cart's orientation
|
|
LDA.b #West : STA SprSubtype, X : STA.w !MinecartDirection
|
|
LDA #$03 : STA !SpriteDirection, X
|
|
JMP .go_horiz
|
|
|
|
.stop_west
|
|
; Set the new direction to west and flip the cart's orientation
|
|
LDA.b #East : STA SprSubtype, X : STA.w !MinecartDirection
|
|
LDA #$02 : STA !SpriteDirection, X
|
|
|
|
; -----------------------------------------------
|
|
.go_horiz
|
|
%SetTimerA($40)
|
|
%StopCart()
|
|
%GotoAction(0) ; Minecart_WaitHoriz
|
|
JSL Player_ResetState
|
|
RTS
|
|
|
|
; -------------------------------------------------------
|
|
.check_for_movement
|
|
CMP.b #$B2 : BEQ .check_direction
|
|
CMP.b #$B3 : BEQ .check_direction
|
|
CMP.b #$B4 : BEQ .check_direction
|
|
CMP.b #$B5 : BEQ .check_direction
|
|
JMP .done
|
|
|
|
.check_direction
|
|
LDA SprSubtype, X
|
|
ASL #2 ; Multiply by 4 (shifting left by 2 bits) to offset rows in the lookup table
|
|
STA $07 ; Store the action index in $07
|
|
|
|
LDA $0FA5 ; Load the tile type
|
|
SEC : SBC.b #$B2 ; Subtract $B2 to normalize the tile type to 0 to 3
|
|
CLC : ADC.w $07 ; Add the action index to the tile type offset to get the composite index
|
|
TAY ; Transfer to Y to use as an offset for the rows
|
|
LDA.w .DirectionTileLookup, Y : TAY
|
|
|
|
JSR ClampSpritePositionToGrid
|
|
CPY #$01 : BEQ .move_north
|
|
CPY #$02 : BEQ .move_east
|
|
CPY #$03 : BEQ .move_south
|
|
CPY #$04 : BEQ .move_west
|
|
JMP .done
|
|
|
|
.move_north
|
|
LDA #$00 : STA SprSubtype, X
|
|
STA !SpriteDirection, X
|
|
%GotoAction(2) ; Minecart_MoveNorth
|
|
RTS
|
|
.move_east
|
|
LDA #$01 : STA SprSubtype, X
|
|
LDA #$03 : STA !SpriteDirection, X
|
|
LDA SprY, X : SEC : SBC.b #$04 : STA SprY, X
|
|
%GotoAction(3) ; Minecart_MoveEast
|
|
RTS
|
|
.move_south
|
|
LDA #$02 : STA SprSubtype, X
|
|
LDA #$01 : STA !SpriteDirection, X
|
|
%GotoAction(4) ; Minecart_MoveSouth
|
|
RTS
|
|
.move_west
|
|
LDA #$03 : STA SprSubtype, X
|
|
LDA #$02 : STA !SpriteDirection, X
|
|
LDA SprY, X : SEC : SBC.b #$04 : STA SprY, X
|
|
%GotoAction(5) ; Minecart_MoveWest
|
|
.done
|
|
RTS
|
|
|
|
; Direction to move on tile collision
|
|
; 00 - stop or nothing
|
|
; 01 - north
|
|
; 02 - east
|
|
; 03 - south
|
|
; 04 - west
|
|
.DirectionTileLookup
|
|
{
|
|
; TL, BL, TR, BR, Stop
|
|
db $02, $00, $04, $00 ; North
|
|
db $00, $00, $03, $01 ; East
|
|
db $00, $02, $00, $04 ; South
|
|
db $03, $01, $00, $00 ; West
|
|
}
|
|
.unused_tile_ids
|
|
{
|
|
; TL, BL, TR, BR
|
|
db $B2, $B3, $B4, $B5
|
|
; db $B0 - Horiz
|
|
; db $B1 | Vert
|
|
; db $B8 Stop North
|
|
; db $B9 Stop South
|
|
; db $BA Stop East
|
|
; db $BB Stop West
|
|
; db $BE + any direction
|
|
}
|
|
}
|
|
|
|
; =========================================================
|
|
; Clamp the sprite position to a 16x16 grid
|
|
; Slows the game down if you run it too often :(
|
|
|
|
ClampSpritePositionToGrid:
|
|
{
|
|
; Check if SprX is already a multiple of 16
|
|
LDA.w SprX, X : AND #$0F : BEQ .x_aligned
|
|
LDA.w SprX, X : LSR : ASL : STA.w SprX, X
|
|
.x_aligned
|
|
; Check if SprY is already a multiple of 16
|
|
LDA.w SprY, X : AND #$0F : BEQ .y_aligned
|
|
LDA.w SprY, X : LSR : ASL : STA.w SprY, X
|
|
.y_aligned
|
|
RTS
|
|
}
|
|
|
|
; =========================================================
|
|
; Check for the switch_track sprite and move based on the
|
|
; state of that sprite.
|
|
|
|
HandleDynamicSwitchTileDirections:
|
|
{
|
|
; Find out if the sprite $B0 is in the room
|
|
JSR CheckSpritePresence : BCC .no_b0
|
|
|
|
PHX : LDA $02 : TAX
|
|
JSR Link_SetupHitBox
|
|
|
|
; X is now the ID of the sprite $B0
|
|
JSR Sprite_SetupHitBox
|
|
PLX
|
|
|
|
JSL CheckIfHitBoxesOverlap : BCC .no_b0
|
|
|
|
LDA !MinecartDirection : CMP.b #$00 : BEQ .east_or_west
|
|
CMP.b #$02 : BEQ .north_or_south
|
|
|
|
.east_or_west
|
|
LDA SwitchRam : BEQ .go_west
|
|
LDA #$01 : STA SprSubtype, X
|
|
LDA #$03 : STA !SpriteDirection, X
|
|
%GotoAction(3) ; Minecart_MoveEast
|
|
RTS
|
|
|
|
.go_west
|
|
LDA #$03 : STA SprSubtype, X
|
|
LDA #$02 : STA !SpriteDirection, X
|
|
%GotoAction(5) ; Minecart_MoveWest
|
|
RTS
|
|
|
|
.north_or_south
|
|
LDA SwitchRam : BNE .go_south
|
|
LDA #$00 : STA SprSubtype, X
|
|
STA !SpriteDirection, X
|
|
%GotoAction(2) ; Minecart_MoveNorth
|
|
RTS
|
|
|
|
.go_south
|
|
LDA #$02 : STA SprSubtype, X
|
|
LDA #$01 : STA !SpriteDirection, X
|
|
%GotoAction(4) ; Minecart_MoveSouth
|
|
RTS
|
|
|
|
.no_b0
|
|
RTS
|
|
}
|
|
|
|
; =========================================================
|
|
; $00 = flag indicating presence of sprite ID $B0
|
|
|
|
CheckSpritePresence:
|
|
{
|
|
PHX
|
|
CLC ; Assume sprite ID $B0 is not present
|
|
LDX.b #$10
|
|
.x_loop
|
|
DEX
|
|
|
|
LDY.b #$04
|
|
.y_loop
|
|
DEY
|
|
LDA $0E20, X : CMP.b #$B0 : BEQ .set_flag
|
|
BRA .not_b0
|
|
|
|
.set_flag
|
|
SEC ; Set flag indicating sprite ID $B0 is present
|
|
STX.w $02
|
|
BRA .done
|
|
|
|
.not_b0
|
|
CPY.b #$00 : BNE .y_loop
|
|
CPX.b #$00 : BNE .x_loop
|
|
.done
|
|
PLX
|
|
|
|
RTS
|
|
}
|
|
|
|
; =========================================================
|
|
|
|
CheckForPlayerInput:
|
|
{
|
|
; Setup Minecart position to look for tile IDs
|
|
LDA.w SprY, X : AND #$F8 : STA.b $00 : LDA.w SprYH, X : STA.b $01
|
|
LDA.w SprX, X : AND #$F8 : STA.b $02 : LDA.w SprXH, X : STA.b $03
|
|
|
|
; Fetch tile attributes based on current coordinates
|
|
LDA.b #$00 : JSL Sprite_GetTileAttr
|
|
|
|
; Load the tile index
|
|
LDA $0FA5 : CLC : CMP.b #$B6 : BNE .cant_input
|
|
|
|
; Check for input from the user (u,d,l,r)
|
|
LDY !SpriteDirection, X
|
|
LDA $F0 : AND .d_pad_press, Y : STA $00 : AND.b #$08 : BEQ .not_pressing_up
|
|
LDA.b #$00 : STA !SpriteDirection, X ; Moving Up
|
|
STA SprSubtype, X
|
|
%GotoAction(2) ; Minecart_MoveNorth
|
|
BRA .return
|
|
|
|
.not_pressing_up:
|
|
LDA $00 : AND.b #$04 : BEQ .not_pressing_down
|
|
LDA.b #$01 : STA !SpriteDirection, X
|
|
LDA #$02 : STA SprSubtype, X
|
|
%GotoAction(4) ; Minecart_MoveSouth
|
|
BRA .return
|
|
|
|
.not_pressing_down
|
|
LDA $00 : AND.b #$02 : BEQ .not_pressing_left
|
|
LDA.b #$02 : STA !SpriteDirection, X
|
|
LDA #$03 : STA SprSubtype, X
|
|
%GotoAction(5) ; Minecart_MoveWest
|
|
BRA .return
|
|
|
|
.not_pressing_left
|
|
LDA $00 : AND.b #$01 : BEQ .always
|
|
LDA.b #$03 : STA !SpriteDirection, X
|
|
STA SprSubtype, X
|
|
%GotoAction(3) ; Minecart_MoveEast
|
|
|
|
.always
|
|
|
|
; LDA !SpriteDirection, X : CMP.b #$03 : BNE .not_going_right
|
|
; ; Default heading in reaction to this tile is going up.
|
|
; ; LDA.b #$00 : STA !SpriteDirection, X
|
|
; .not_going_right
|
|
; ;STZ $0D80, X
|
|
|
|
.return
|
|
|
|
.cant_input
|
|
RTS
|
|
|
|
.d_pad_press
|
|
db $0B, $07, $0E, $0D
|
|
}
|
|
|
|
; =========================================================
|
|
; Sets carry if player is overlapping the sprite
|
|
; Clear carry if player is outside the bounds
|
|
|
|
CheckIfPlayerIsOn:
|
|
{
|
|
REP #$20
|
|
LDA $22 : CLC : ADC #$0009 : CMP $0FD8 : BCC .left
|
|
LDA $22 : SEC : SBC #$0009 : CMP $0FD8 : BCS .right
|
|
|
|
LDA $20 : CLC : ADC #$0012 : CMP $0FDA : BCC .up
|
|
LDA $20 : SEC : SBC #$0012 : CMP $0FDA : BCS .down
|
|
|
|
SEP #$21 : RTS ; Return with carry set
|
|
|
|
.left
|
|
.right
|
|
.up
|
|
.down
|
|
SEP #$20
|
|
CLC : RTS ; Return with carry cleared
|
|
}
|
|
|
|
|
|
POSY = $7E0020
|
|
POSYH = $7E0021
|
|
POSX = $7E0022
|
|
POSXH = $7E0023
|
|
|
|
; 20 steps of animation and movement caching for followers
|
|
FOLLOWERYL = $7E1A00
|
|
FOLLOWERYH = $7E1A14
|
|
|
|
FOLLOWERXL = $7E1A28
|
|
FOLLOWERXH = $7E1A3C
|
|
|
|
FOLLOWERZ = $7E1A50
|
|
FOLLOWERLAYER = $7E1A64
|
|
|
|
; Follower head/body gfx offsets
|
|
FLWHO = $7E0AE8
|
|
FLWHOH = $7E0AE9
|
|
FLWBO = $7E0AEA
|
|
FLWBOH = $7E0AEB
|
|
|
|
; Follower head
|
|
FLWHGFXT = $7E0AEC
|
|
FLWHGFXTH = $7E0AED
|
|
FLWHGFXB = $7E0AEE
|
|
FLWHGFXBH = $7E0AEF
|
|
|
|
; Follower body
|
|
FLWBGFXT = $7E0AF0
|
|
FLWBGFXTH = $7E0AF1
|
|
FLWBGFXB = $7E0AF2
|
|
FLWBGFXBH = $7E0AF3
|
|
|
|
; Index from 0x00 to 0x13 for follower animation step index. Used for reading data.
|
|
FLWANIMIR = $7E02CF
|
|
|
|
FollowerDraw_CalculateOAMCoords:
|
|
{
|
|
REP #$20
|
|
LDA.b $02 : STA.b ($90),Y
|
|
INY
|
|
|
|
CLC : ADC.w #$0080
|
|
CMP.w #$0180 : BCS .off_screen
|
|
|
|
LDA.b $02 : AND.w #$0100 : STA.b $74
|
|
LDA.b $00 : STA.b ($90),Y
|
|
|
|
CLC : ADC.w #$0010
|
|
CMP.w #$0100 : BCC .on_screen
|
|
|
|
.off_screen:
|
|
LDA.w #$00F0 : STA.b ($90),Y
|
|
|
|
.on_screen:
|
|
SEP #$20
|
|
INY
|
|
RTS
|
|
}
|
|
|
|
|
|
MinecartFollower_Top:
|
|
{
|
|
JSR FollowerDraw_CalculateOAMCoords
|
|
|
|
RTS
|
|
|
|
.start_index:
|
|
db $00, $02, $04, $06
|
|
.nbr_of_tiles:
|
|
db 1, 1, 1, 1
|
|
.x_offsets:
|
|
dw -8, 8
|
|
dw -8, 8
|
|
dw -8, 8
|
|
dw -8, 8
|
|
.y_offsets:
|
|
dw -12, -12
|
|
dw -11, -11
|
|
dw -8, -8
|
|
dw -7, -7
|
|
.chr:
|
|
db $40, $40
|
|
db $40, $40
|
|
db $42, $42
|
|
db $42, $42
|
|
.properties:
|
|
db $3D, $7D
|
|
db $3D, $7D
|
|
db $3D, $7D
|
|
db $3D, $7D
|
|
.sizes:
|
|
db $02, $02
|
|
db $02, $02
|
|
db $02, $02
|
|
db $02, $02
|
|
}
|
|
|
|
MinecartFollower_Bottom:
|
|
{
|
|
SEP #$30
|
|
|
|
JSR FollowerDraw_CalculateOAMCoords
|
|
|
|
LDA.w .chr+0, X : STA.b ($90), Y
|
|
INY
|
|
|
|
LDA.w .chr+1, X : STA.b ($90), Y
|
|
INY
|
|
|
|
PHY
|
|
TYA : SEC : SBC.b #$04
|
|
LSR #2 : TAY
|
|
LDA.b #$00 : ORA.b $75 : STA.b ($92), Y
|
|
PLY
|
|
|
|
#_09AACE: REP #$20
|
|
|
|
#_09AAD0: LDA.b $02
|
|
#_09AAD2: CLC
|
|
#_09AAD3: ADC.w #$0008
|
|
#_09AAD6: STA.b $02
|
|
|
|
#_09AAD8: STZ.b $74
|
|
|
|
#_09AADA: SEP #$20
|
|
|
|
#_09AADC: JSR FollowerDraw_CalculateOAMCoords
|
|
|
|
#_09AADF: LDA.w .chr+2,X
|
|
#_09AAE2: STA.b ($90),Y
|
|
|
|
#_09AAE4: INY
|
|
|
|
#_09AAE5: LDA.w .chr+3,X
|
|
#_09AAE8: STA.b ($90),Y
|
|
|
|
#_09AAEA: INY
|
|
|
|
#_09AAEB: PHY
|
|
|
|
#_09AAEC: TYA
|
|
#_09AAED: SEC
|
|
#_09AAEE: SBC.b #$04
|
|
|
|
#_09AAF0: LSR A
|
|
#_09AAF1: LSR A
|
|
#_09AAF2: TAY
|
|
|
|
#_09AAF3: LDA.b #$00
|
|
#_09AAF5: ORA.b $75
|
|
#_09AAF7: STA.b ($92),Y
|
|
|
|
#_09AAF9: PLY
|
|
|
|
#_09AB34: REP #$30
|
|
|
|
; #_09AB36: PHY
|
|
|
|
; #_09AB37: LDA.b $04
|
|
; #_09AB39: AND.w #$00FF
|
|
; #_09AB3C: ASL A
|
|
; #_09AB3D: ASL A
|
|
; #_09AB3E: ASL A
|
|
; #_09AB3F: TAY
|
|
|
|
; #_09AB40: LDA.l $7EF3CC
|
|
; #_09AB44: AND.w #$00FF
|
|
; #_09AB47: ASL A
|
|
; #_09AB48: TAX
|
|
|
|
; #_09AB49: TYA
|
|
; #_09AB4A: CLC
|
|
; #_09AB4B: ADC.w .char_data_offset,X
|
|
; #_09AB4E: TAX
|
|
|
|
; #_09AB4F: LDA.w .x_offsets+0,X
|
|
; #_09AB52: CLC
|
|
; #_09AB53: ADC.b $06
|
|
; #_09AB55: STA.b $00
|
|
|
|
; #_09AB57: LDA.w .x_offsets+2,X
|
|
; #_09AB5A: CLC
|
|
; #_09AB5B: ADC.b $08
|
|
; #_09AB5D: STA.b $02
|
|
|
|
; #_09AB5F: PLY
|
|
|
|
#_09AB60: SEP #$30
|
|
|
|
#_09AB62: JSR FollowerDraw_CalculateOAMCoords
|
|
|
|
#_09AB65: LDA.b #$20
|
|
#_09AB67: STA.b ($90),Y
|
|
|
|
#_09AB69: INY
|
|
|
|
#_09AB6A: LDA.b $04
|
|
#_09AB6C: ASL A
|
|
#_09AB6D: CLC
|
|
#_09AB6E: ADC.b $04
|
|
#_09AB70: TAX
|
|
|
|
#_09AB71: LDA.w .properties+0,X
|
|
#_09AB74: STA.w $0AE8
|
|
|
|
#_09AB77: LDA.w .properties+2,X
|
|
#_09AB7A: AND.b #$F0
|
|
#_09AB7C: ORA.b $72
|
|
#_09AB7E: ORA.b $65
|
|
#_09AB80: STA.b ($90),Y
|
|
|
|
#_09AB82: INY
|
|
#_09AB83: PHY
|
|
|
|
#_09AB84: TYA
|
|
#_09AB85: SEC
|
|
#_09AB86: SBC.b #$04
|
|
#_09AB88: LSR A
|
|
#_09AB89: LSR A
|
|
#_09AB8A: TAY
|
|
|
|
#_09AB8B: LDA.b #$02
|
|
#_09AB8D: ORA.b $75
|
|
#_09AB8F: STA.b ($92),Y
|
|
|
|
#_09AB91: PLY
|
|
|
|
.bomb_or_chest
|
|
; #_09AB92: REP #$30
|
|
; #_09AB94: PHY
|
|
|
|
; #_09AB95: LDA.b $04
|
|
; #_09AB97: AND.w #$00FF
|
|
; #_09AB9A: ASL A
|
|
; #_09AB9B: ASL A
|
|
; #_09AB9C: ASL A
|
|
; #_09AB9D: TAY
|
|
|
|
; #_09AB9E: LDA.l $7EF3CC
|
|
; #_09ABA2: AND.w #$00FF
|
|
; #_09ABA5: ASL A
|
|
; #_09ABA6: TAX
|
|
|
|
; #_09ABA7: TYA
|
|
; #_09ABA8: CLC
|
|
; #_09ABA9: ADC.w .char_data_offset,X
|
|
; #_09ABAC: TAX
|
|
|
|
; #_09ABAD: LDA.w .x_offsets+4,X
|
|
; #_09ABB0: CLC
|
|
; #_09ABB1: ADC.b $06
|
|
; #_09ABB3: CLC
|
|
; #_09ABB4: ADC.w #$0008
|
|
; #_09ABB7: STA.b $00
|
|
|
|
; #_09ABB9: LDA.w .x_offsets+6,X
|
|
; #_09ABBC: CLC
|
|
; #_09ABBD: ADC.b $08
|
|
; #_09ABBF: STA.b $02
|
|
|
|
; #_09ABC1: PLY
|
|
; #_09ABC2: SEP #$30
|
|
|
|
#_09ABC4: JSR FollowerDraw_CalculateOAMCoords
|
|
|
|
#_09ABC7: LDA.b #$22
|
|
#_09ABC9: STA.b ($90),Y
|
|
|
|
#_09ABCB: INY
|
|
|
|
#_09ABCC: LDA.b $04
|
|
#_09ABCE: ASL A
|
|
#_09ABCF: CLC
|
|
#_09ABD0: ADC.b $04
|
|
#_09ABD2: TAX
|
|
|
|
#_09ABD3: LDA.w .properties+1,X
|
|
#_09ABD6: STA.w $0AEA
|
|
|
|
#_09ABD9: LDA.w .properties+2,X
|
|
#_09ABDC: AND.b #$0F
|
|
|
|
#_09ABDE: ASL A
|
|
#_09ABDF: ASL A
|
|
#_09ABE0: ASL A
|
|
#_09ABE1: ASL A
|
|
|
|
#_09ABE2: ORA.b $72
|
|
#_09ABE4: ORA.b $65
|
|
#_09ABE6: STA.b ($90),Y
|
|
|
|
#_09ABE8: INY
|
|
|
|
#_09ABE9: TYA
|
|
#_09ABEA: SEC
|
|
#_09ABEB: SBC.b #$04
|
|
#_09ABED: LSR A
|
|
#_09ABEE: LSR A
|
|
#_09ABEF: TAY
|
|
|
|
#_09ABF0: LDA.b #$02
|
|
#_09ABF2: ORA.b $75
|
|
#_09ABF4: STA.b ($92),Y
|
|
|
|
RTS
|
|
|
|
.start_index:
|
|
db $00, $02, $04, $06
|
|
.nbr_of_tiles:
|
|
db 1, 1, 1, 1
|
|
.x_offsets:
|
|
dw -8, 8
|
|
dw -8, 8
|
|
dw -8, 8
|
|
dw -8, 8
|
|
.y_offsets:
|
|
dw 4, 4
|
|
dw 5, 5
|
|
dw 8, 8
|
|
dw 9, 9
|
|
.chr:
|
|
db $60, $60
|
|
db $60, $60
|
|
db $62, $62
|
|
db $62, $62
|
|
.properties:
|
|
db $3D, $7D
|
|
db $3D, $7D
|
|
db $3D, $7D
|
|
db $3D, $7D
|
|
.sizes:
|
|
db $02, $02
|
|
db $02, $02
|
|
db $02, $02
|
|
db $02, $02
|
|
}
|
|
|
|
DrawMinecartFollower:
|
|
{
|
|
LDA POSX : STA $05
|
|
LDA POSXH : STA $06
|
|
LDA POSY : STA $07
|
|
LDA POSYH : STA $08
|
|
|
|
; JSR FollowerDraw_CachePosition
|
|
; JSR MinecartFollower_Top
|
|
|
|
JSR FollowerDraw_CachePosition
|
|
JSR MinecartFollower_Bottom
|
|
|
|
RTS
|
|
}
|
|
|
|
FollowerDraw_CachePosition:
|
|
{
|
|
LDX.b #$00
|
|
LDA.w $1A00, X : STA.b $00
|
|
LDA.w $1A14, X : STA.b $01
|
|
LDA.w $1A28, X : STA.b $02
|
|
LDA.w $1A3C, X : STA.b $03
|
|
LDA.w $1A64, X : STA.b $05
|
|
|
|
; -------------------------
|
|
#_09A95B: AND.b #$20
|
|
#_09A95D: LSR A
|
|
#_09A95E: LSR A
|
|
#_09A95F: TAY
|
|
|
|
#_09A960: LDA.b $05
|
|
#_09A962: AND.b #$03
|
|
#_09A964: STA.b $04
|
|
|
|
#_09A966: STZ.b $72
|
|
; Vanilla game would check some priority and collision
|
|
; variables based on the follower here and manipulate $72
|
|
; if the player was immobile.
|
|
|
|
CLC : ADC $04 : STA $04
|
|
TYA : CLC : ADC $04 : STA $04
|
|
; -------------------------
|
|
|
|
REP #$20
|
|
LDA $0FB3 : AND.w #$00FF : ASL A : TAY
|
|
LDA $20 : CMP $00 : BEQ .check_priority_for_region
|
|
BCS .use_region_b
|
|
BRA .use_region_a
|
|
.check_priority_for_region
|
|
LDA $05 : AND.w #$0003 : BNE .use_region_b
|
|
.use_region_a
|
|
LDA.w .oam_region_offsets_a, Y
|
|
BRA .set_region
|
|
.use_region_b
|
|
LDA.w .oam_region_offsets_b, Y
|
|
|
|
.set_region
|
|
|
|
PHA
|
|
|
|
LSR #2 : CLC : ADC.w #$0A20 : STA $92
|
|
PLA : CLC : ADC.w #$0800 : STA $90
|
|
|
|
LDA $00 : SEC : SBC $E8 : STA $06
|
|
LDA $02 : SEC : SBC $E2 : STA $08
|
|
|
|
SEP #$20
|
|
|
|
LDA $02D7 : ASL #2 : STA $05
|
|
TXA : CLC : ADC $05 : TAX
|
|
|
|
REP #$20
|
|
|
|
LDA $06 : CLC : ADC.w #$0010 : STA $00
|
|
LDA $08 : STA $02
|
|
STZ $74
|
|
|
|
SEP #$20
|
|
|
|
RTS
|
|
|
|
.oam_region_offsets_a
|
|
dw $0170
|
|
dw $00C0
|
|
|
|
.oam_region_offsets_b
|
|
dw $01C0
|
|
dw $0110
|
|
}
|
|
|
|
|
|
CheckForMinecartFollowerDraw:
|
|
{
|
|
PHB : PHK : PLB
|
|
LDA.l $7EF3CC : CMP.b #$0B : BNE .not_minecart
|
|
JSR DrawMinecartFollower
|
|
|
|
.not_minecart
|
|
LDA.b #$10
|
|
STA.b $5E
|
|
PLB
|
|
RTL
|
|
}
|
|
|
|
pushpc
|
|
|
|
; Follower_OldManUnused
|
|
org $09A41F
|
|
JSL CheckForMinecartFollowerDraw
|
|
|
|
pullpc
|
|
|
|
; =========================================================
|
|
; Draw the portion of the cart which is behind the player
|
|
|
|
Sprite_Minecart_DrawTop:
|
|
{
|
|
JSL Sprite_PrepOamCoord
|
|
LDA #$08
|
|
JSL OAM_AllocateFromRegionB
|
|
|
|
LDA $0DC0, X : CLC : ADC $0D90, X : TAY ; Animation Frame
|
|
LDA .start_index, Y : STA $06
|
|
|
|
PHX
|
|
LDX .nbr_of_tiles, Y ; amount of tiles -1
|
|
LDY.b #$00
|
|
.nextTile
|
|
|
|
PHX ; Save current Tile Index?
|
|
TXA : CLC : ADC $06 ; Add Animation Index Offset
|
|
PHA ; Keep the value with animation index offset?
|
|
|
|
ASL A : TAX
|
|
|
|
REP #$20
|
|
|
|
LDA $00 : CLC : ADC .x_offsets, X : STA ($90), Y
|
|
AND.w #$0100 : STA $0E
|
|
INY
|
|
LDA $02 : CLC : ADC .y_offsets, X : STA ($90), Y
|
|
CLC : ADC #$0010 : CMP.w #$0100
|
|
SEP #$20
|
|
BCC .on_screen_y
|
|
|
|
LDA.b #$F0 : STA ($90), Y ;Put the sprite out of the way
|
|
STA $0E
|
|
.on_screen_y
|
|
|
|
PLX ; Pullback Animation Index Offset (without the *2 not 16bit anymore)
|
|
INY
|
|
LDA .chr, X : STA ($90), Y
|
|
INY
|
|
LDA .properties, X : STA ($90), Y
|
|
|
|
PHY
|
|
|
|
TYA : LSR #2 : TAY
|
|
|
|
LDA .sizes, X : ORA $0F : STA ($92), Y ; store size in oam buffer
|
|
|
|
PLY : INY
|
|
PLX : DEX : BPL .nextTile
|
|
|
|
PLX
|
|
|
|
RTS
|
|
|
|
.start_index
|
|
db $00, $02, $04, $06
|
|
.nbr_of_tiles
|
|
db 1, 1, 1, 1
|
|
.x_offsets
|
|
dw -8, 8
|
|
dw -8, 8
|
|
dw -8, 8
|
|
dw -8, 8
|
|
.y_offsets
|
|
dw -12, -12
|
|
dw -11, -11
|
|
dw -8, -8
|
|
dw -7, -7
|
|
.chr
|
|
db $40, $40
|
|
db $40, $40
|
|
db $42, $42
|
|
db $42, $42
|
|
.properties
|
|
db $3D, $7D
|
|
db $3D, $7D
|
|
db $3D, $7D
|
|
db $3D, $7D
|
|
.sizes
|
|
db $02, $02
|
|
db $02, $02
|
|
db $02, $02
|
|
db $02, $02
|
|
}
|
|
|
|
; =========================================================
|
|
; Draw the portion of the cart which is in front of the player
|
|
|
|
Sprite_Minecart_DrawBottom:
|
|
{
|
|
JSL Sprite_PrepOamCoord
|
|
LDA #$08
|
|
JSL OAM_AllocateFromRegionC
|
|
|
|
LDA $0DC0, X : CLC : ADC $0D90, X : TAY;Animation Frame
|
|
LDA .start_index, Y : STA $06
|
|
|
|
|
|
PHX
|
|
LDX .nbr_of_tiles, Y ;amount of tiles -1
|
|
LDY.b #$00
|
|
.nextTile
|
|
|
|
PHX ; Save current Tile Index?
|
|
|
|
TXA : CLC : ADC $06 ; Add Animation Index Offset
|
|
|
|
PHA ; Keep the value with animation index offset?
|
|
|
|
ASL A : TAX
|
|
|
|
REP #$20
|
|
|
|
LDA $00 : CLC : ADC .x_offsets, X : STA ($90), Y
|
|
AND.w #$0100 : STA $0E
|
|
INY
|
|
LDA $02 : CLC : ADC .y_offsets, X : STA ($90), Y
|
|
CLC : ADC #$0010 : CMP.w #$0100
|
|
SEP #$20
|
|
BCC .on_screen_y
|
|
|
|
LDA.b #$F0 : STA ($90), Y ;Put the sprite out of the way
|
|
STA $0E
|
|
.on_screen_y
|
|
|
|
PLX ; Pullback Animation Index Offset (without the *2 not 16bit anymore)
|
|
INY
|
|
LDA .chr, X : STA ($90), Y
|
|
INY
|
|
LDA .properties, X : STA ($90), Y
|
|
|
|
PHY
|
|
|
|
TYA : LSR #2 : TAY
|
|
|
|
LDA .sizes, X : ORA $0F : STA ($92), Y ; store size in oam buffer
|
|
|
|
PLY : INY
|
|
|
|
PLX : DEX : BPL .nextTile
|
|
|
|
PLX
|
|
|
|
; Debug box which draws in the location of the hitbox from
|
|
; the code in HandleTileDirections / SetTileLookupPosBasedOnDirection
|
|
; The latter of which is an experimental function
|
|
; {
|
|
; LDA $0FD8 : STA $00
|
|
; LDA $0FDA : STA $02
|
|
|
|
; PHY
|
|
; JSL Sprite_PrepOamCoord
|
|
; PLY
|
|
|
|
; REP #$20
|
|
|
|
; LDA $00 : STA ($90), Y
|
|
; AND.w #$0100 : STA $0E
|
|
; INY
|
|
; LDA $02 : STA ($90), Y
|
|
; CLC : ADC #$0010 : CMP.w #$0100
|
|
; SEP #$20
|
|
; BCC .on_screen_y2
|
|
|
|
; LDA.b #$F0 : STA ($90), Y ;Put the sprite out of the way
|
|
; STA $0E
|
|
; .on_screen_y2
|
|
|
|
; INY
|
|
; LDA #$3A : STA ($90), Y
|
|
; INY
|
|
; LDA #$B9 : STA ($90), Y
|
|
|
|
; PHY
|
|
|
|
; TYA : LSR #2 : TAY
|
|
|
|
; LDA #$02 : ORA $0F : STA ($92), Y ; store size in oam buffer
|
|
|
|
; PLY : INY
|
|
; }
|
|
|
|
RTS
|
|
|
|
.start_index
|
|
db $00, $02, $04, $06
|
|
.nbr_of_tiles
|
|
db 1, 1, 1, 1
|
|
.x_offsets
|
|
dw -8, 8
|
|
dw -8, 8
|
|
dw -8, 8
|
|
dw -8, 8
|
|
.y_offsets
|
|
dw 4, 4
|
|
dw 5, 5
|
|
dw 8, 8
|
|
dw 9, 9
|
|
.chr
|
|
db $60, $60
|
|
db $60, $60
|
|
db $62, $62
|
|
db $62, $62
|
|
.properties
|
|
db $3D, $7D
|
|
db $3D, $7D
|
|
db $3D, $7D
|
|
db $3D, $7D
|
|
.sizes
|
|
db $02, $02
|
|
db $02, $02
|
|
db $02, $02
|
|
db $02, $02
|
|
} |