Merge pull request #105 from scawful/NewMinecart

Add updated minecart collision, switch track, multi cart, T junction tracks

.gitignore

@@ -10,6 +10,18 @@ oos111x.sfc
 oos111x.smp.sym
 oos111x.srm
 oos111x.sym
+zcompress.exe
+oos165.sfc
+oos165x-1.bst
+oos165x-2.bst
+oos165x-3.bst
+oos165x.bp
+oos165x.cpu.sym
+oos165x.sfc
+oos165x.smp.sym
+oos165x.srm
+buildJ.bat
+oos165x.cht
 Roms
 Dungeons/Assets
 Items/gfx/jump_frames.xcf

Core/sprite_macros.asm

@@ -132,9 +132,9 @@ macro PlayAnimation(frame_start, frame_end, frame_wait)
 {
   LDA.w SprTimerB, X : BNE +
     LDA.w SprFrame, X : INC : STA.w SprFrame, X
-                        CMP.b #<frame_end>+1 : BCC .noframereset
+                        CMP.b #<frame_end>+1 : BCC ++
       LDA.b #<frame_start> : STA.w SprFrame, X
-    .noframereset
+    ++
     LDA.b #<frame_wait> : STA.w SprTimerB, X
   +
 }
@@ -143,9 +143,9 @@ endmacro
 macro PlayAnimBackwards(frame_start, frame_end, frame_wait)
   LDA.w SprTimerB, X : BNE +
     LDA.w SprFrame, X : DEC : STA.w SprFrame, X
-                        CMP.b #<frame_end> : BCS .noframereset
+                        CMP.b #<frame_end> : BCS ++
       LDA.b #<frame_start> : STA.w SprFrame, X
-    .noframereset
+    ++
     LDA.b #<frame_wait> : STA.w SprTimerB, X
   +
 endmacro

Sprites/NPCs/followers.asm

@@ -98,13 +98,13 @@ ZoraBaby_RevertToSprite:
 
   PHX
   TAX
-  LDA.w $1A64, X : AND.b #$03 : STA.w SprMiscE,Y : STA.w SprMiscC,Y
+  LDA.w $1A64, X : AND.b #$03 : STA.w SprMiscE, Y : STA.w SprMiscC, Y
-  LDA.w $1A00, X : CLC : ADC.b #$02 : STA.w SprY,Y
+  LDA.w $1A00, X : CLC : ADC.b #$02 : STA.w SprY, Y
-  LDA.w $1A14, X : ADC.b #$00 : STA.w SprYH,Y
+  LDA.w $1A14, X       : ADC.b #$00 : STA.w SprYH, Y
-  LDA.w $1A28, X : CLC : ADC.b #$10 : STA.w SprX,Y
+  LDA.w $1A28, X : CLC : ADC.b #$10 : STA.w SprX, Y
-  LDA.w $1A3C, X : ADC.b #$00 : STA.w SprXH,Y
+  LDA.w $1A3C, X       : ADC.b #$00 : STA.w SprXH, Y
-  LDA.b $EE : STA.w $0F20,Y
+  LDA.b $EE : STA.w $0F20, Y
-  LDA.b #$01 : STA.w SprBulletproof,Y : STA.w $0E80,Y
+  LDA.b #$01 : STA.w SprBulletproof, Y : STA.w $0E80, Y
   LDA.b #$04 : STA.w SprAction, Y
   LDA.b #$FF : STA.w SprTimerB, Y
   PLX
@@ -609,17 +609,17 @@ pullpc
 FollowerDraw_CalculateOAMCoords:
 {
   REP #$20
-  LDA.b $02 : STA.b ($90),Y
+  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
+    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
+  LDA.w #$00F0 : STA.b ($90), Y
 
   .on_screen:
   SEP #$20
@@ -784,7 +784,8 @@ MinecartFollower_TransitionToSprite:
   JSL Sprite_SpawnDynamically
   TYX
   JSL Sprite_SetSpawnedCoords
-  LDA.w !MinecartDirection : CMP.b #$00 : BEQ .vert_adjust
+  LDA.w !MinecartDirectionCache : STA.w !MinecartDirection, X
+  CMP.b #$00 : BEQ .vert_adjust
                              CMP.b #$02 : BEQ .vert_adjust
     LDA.w POSY : CLC : ADC #$08 : STA.w SprY, X
     LDA.w POSX                  : STA.w SprX, X
@@ -795,11 +796,14 @@ MinecartFollower_TransitionToSprite:
   .finish_prep
   LDA.w POSYH : STA.w SprYH, X
   LDA.w POSXH : STA.w SprXH, X
-  LDA.w !MinecartDirection
+  LDA.w !MinecartDirection, X
-  CLC : ADC.b #$04
+  CLC : ADC.b #$04 : STA.w SprMiscB, X
-  STA.w SprSubtype, X
+
+  ; Tell the newly spawned cart which track it is on.
+  LDA.w !MinecartTrackCache : STA.w SprSubtype, X
 
   LDA Minecart_AnimDirection, X : STA $0D90, X
+
   JSL Sprite_Minecart_Prep
   LDA.b #$00 : STA.l $7EF3CC
   RTL
@@ -810,7 +814,7 @@ DrawMinecartFollower:
 {
   JSL $099EFC ; Follower_Initialize
 
-  LDX !MinecartDirection
+  LDA.w !MinecartDirectionCache : TAX
   LDA Minecart_AnimDirection, X : STA $02CF
 
   JSR FollowerDraw_CachePosition
@@ -836,6 +840,13 @@ FollowerDraw_CachePosition:
   LDA.w $1A3C, X : STA.b $03
   LDA.w $1A64, X : STA.b $05
 
+  ; Adjust the coordinate a bit to place it more in line where the
+  ; minecart should be relative to Link.
+  REP #$20
+  LDA.b $00 : SEC : SBC.w #$0008 : STA.b $00
+  LDA.b $02 : CLC : ADC.w #$0002 : STA.b $02
+  SEP #$20
+
   ; -------------------------
   AND.b #$20
   LSR A
@@ -927,6 +938,12 @@ CheckForFollowerInterroomTransition:
 {
   LDA.w !LinkInCart : BEQ .not_in_cart
     LDA.b #$0B : STA $7EF3CC
+
+    ; Pause the current cart so that it doesn't draw anymore
+    PHX
+    LDX.w !MinecartCurrent
+    LDA.b #$01 : STA $0F00, X
+    PLX
   .not_in_cart
   JSL $01873A ; Underworld_LoadRoom
   RTL
@@ -951,7 +968,7 @@ LinkState_Minecart:
   STZ.b $48
 
   ; Move Link based on the direction of the cart
-  LDA.w !MinecartDirection : BNE .not_north
+  LDA.w !MinecartDirection, X : BNE .not_north
     LDY.b #$00
     LDA.w .drag_y_low, Y : CLC : ADC.w $0B7E : STA.w $0B7E
     LDA.w .drag_y_high, Y : ADC.w $0B7F : STA.w $0B7F

Sprites/Objects/mineswitch.asm

@@ -52,7 +52,11 @@ Sprite_LeverSwitch_Prep:
   PHB : PHK : PLB
 
   LDA.b #$00 : STA.w SprDefl, X
-  LDA.w SprSubtype, X : STA.w SprAction, X
+
+  ; Get the subtype of the switch so that we can get its on/off state.
+  LDA.w SprSubtype, X : TAY
+
+  LDA.w SwitchRam, Y : STA.w SprAction, X : STA.w SprFrame, X
   LDA.b #$00 : STA.w SprTileDie, X
   STZ.w SprBulletproof, X
 
@@ -81,7 +85,11 @@ Sprite_LeverSwitch_Main:
       JSL Sprite_CheckDamageFromPlayer : BCC .NoDamage
         LDA #$25 : STA $012F
 
-        STZ.w $37
+        ; Get the subtype of the switch so that we can get its on/off state.
+        LDA.w SprSubtype, X : TAY
+
+        ; Turn the switch on.
+        LDA #$01 : STA.w SwitchRam, Y
         LDA #$10 : STA.w SprTimerA, X
         %GotoAction(1)
     .NoDamage
@@ -94,7 +102,12 @@ Sprite_LeverSwitch_Main:
     LDA.w SprTimerA, X : BNE .NoDamage
       JSL Sprite_CheckDamageFromPlayer : BCC .NoDamage
         LDA #$25 : STA $012F
-        LDA #$01 : STA $37
+
+        ; Get the subtype of the switch so that we can get its on/off state.
+        LDA.w SprSubtype, X : TAY
+        
+        ; Turn the switch off.
+        LDA #$00 : STA.w SwitchRam, Y
         LDA #$10 : STA.w SprTimerA, X
         %GotoAction(0)
     .NoDamage
@@ -129,9 +142,9 @@ Sprite_LeverSwitch_Main:
 Sprite_LeverSwitch_Draw:
 {
     JSL Sprite_PrepOamCoord
-    JSL Sprite_OAM_AllocateDeferToPlayer
+    LDA.b #$04 : JSL Sprite_OAM_AllocateDeferToPlayer
 
-    LDA $0DC0, X : CLC : ADC $0D90, X : TAY;Animation Frame
+    LDA $0DC0, X : CLC : ADC $0D90, X : TAY ;Animation Frame
     LDA .start_index, Y : STA $06
 
 
@@ -194,8 +207,8 @@ Sprite_LeverSwitch_Draw:
     dw 0
     dw 0
   .chr
-    db $64
     db $66
+    db $64
   .properties
     db $37
     db $37

Sprites/Objects/switch_track.asm

@@ -50,7 +50,24 @@ Sprite_RotatingTrack_Prep:
 {
   PHB : PHK : PLB
   LDA.b #$80 : STA.w SprDefl, X
-  LDA.w SprSubtype, X : STA.w SprAction,X
+  
+  ; Setup Minecart position to look for tile IDs
+  ; We use AND #$F8 to clamp to a 8x8 grid.
+  ; Subtract 8 from the Y position to get the tile right above instead.
+  LDA.w SprY, X : AND #$F8 : SEC : SBC.b #$08 : 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 #$00 : JSL Sprite_GetTileAttr
+
+  LDA.w SPRTILE : SEC : SBC.b #$D0 : STA.w SprAction, X
+
+  ; Run the main frame once so that the animation frame is
+  ; started correctly.
+  JSR Sprite_RotatingTrack_Main
   PLB
   RTL
 }
@@ -61,75 +78,68 @@ Sprite_RotatingTrack_Prep:
 ; 1 = TopRight -> BottomRight
 ; 2 = BottomRight -> BottomLeft
 ; 3 = BottomLeft -> TopLeft
-; 4 = TopRight -> TopLeft
 
-SwitchRam = $37
+; The state of each switch. Up to $0250 used which is all free ram.
+SwitchRam = $0230
 
 Sprite_RotatingTrack_Main:
 {
+  ; Get the subtype of the track so that we can get its on/off state.
+  LDA.w SprSubtype, X : TAY
+
   LDA.w SprAction, X
   JSL UseImplicitRegIndexedLocalJumpTable
 
   dw TopLeftToTopRight
+  dw BottomLeftToTopLeft
   dw TopRightToBottomRight
   dw BottomRightToBottomLeft
-  dw BottomLeftToTopLeft
-  dw TopRightToTopLeft
   
   ; -------------------------------------------------------
   ; 00 = TopLeft -> TopRight
   TopLeftToTopRight:
   {
-    LDA.w SwitchRam : BNE part2
+    LDA.w SwitchRam, Y : BNE .part2
-      %PlayAnimation(0,0,4)
+      LDA.b #$00 : STA.w SprFrame, X
-    part2:
+      RTS
-    %PlayAnimation(1,1,4)
+    .part2
+    LDA.b #$01 : STA.w SprFrame, X
     RTS
   }
 
   ; -------------------------------------------------------
-  ; 01 = TopRight -> BottomRight
+  ; 01 = BottomLeft -> TopLeft
-  TopRightToBottomRight:
-  {
-    LDA.w SwitchRam : BNE part2_a
-      %PlayAnimation(1,1,4)
-    part2_a:
-    %PlayAnimation(2,2,4)
-    RTS
-  }
-
-  ; -------------------------------------------------------
-  ; 02 = BottomRight -> BottomLeft
-  BottomRightToBottomLeft:
-  {
-    LDA.w SwitchRam : BEQ part2_b
-      %PlayAnimation(2,2,4)
-    part2_b:
-    %PlayAnimation(3,3,4)
-    RTS
-  }
-
-  ; -------------------------------------------------------
-  ; 03 = BottomLeft -> TopLeft
   BottomLeftToTopLeft:
   {
-    LDA.w SwitchRam : BNE part2_c
+    LDA.w SwitchRam, Y : BNE .part2_c
-      %PlayAnimation(3,3,4)
+      LDA.b #$03 : STA.w SprFrame, X
-    part2_c:
+      RTS
-    %PlayAnimation(0,0,4)
+    .part2_c
+    LDA.b #$00 : STA.w SprFrame, X
     RTS
   }
 
   ; -------------------------------------------------------
-  ; 04 = TopRight -> TopLeft
+  ; 02 = TopRight -> BottomRight
-  TopRightToTopLeft:
+  TopRightToBottomRight:
   {
-    LDA.w SwitchRam : BNE part2_d
+    LDA.w SwitchRam, Y : BNE .part2_a
-      %StartOnFrame(1)
+      LDA.b #$01 : STA.w SprFrame, X
-      %PlayAnimation(1,1,4)
+      RTS
-    part2_d:
+    .part2_a
-    %StartOnFrame(0)
+    LDA.b #$02 : STA.w SprFrame, X
-    %PlayAnimation(0,0,4)
+    RTS
+  }
+
+  ; -------------------------------------------------------
+  ; 03 = BottomRight -> BottomLeft
+  BottomRightToBottomLeft:
+  {
+    LDA.w SwitchRam, Y : BEQ .part2_b
+      LDA.b #$03 : STA.w SprFrame, X
+      RTS
+    .part2_b
+    LDA.b #$02 : STA.w SprFrame, X
     RTS
   }
 }
@@ -139,7 +149,7 @@ Sprite_RotatingTrack_Main:
 Sprite_RotatingTrack_Draw:
 {
   JSL Sprite_PrepOamCoord
-  JSL Sprite_OAM_AllocateDeferToPlayer
+  LDA.b #$04 : JSL OAM_AllocateFromRegionB
 
   LDA $0DC0, X : CLC : ADC $0D90, X : TAY;Animation Frame
   LDA .start_index, Y : STA $06
@@ -191,7 +201,6 @@ Sprite_RotatingTrack_Draw:
 
   RTS
 
-
   .start_index
     db $00, $01, $02, $03
   .nbr_of_tiles
@@ -202,8 +211,10 @@ Sprite_RotatingTrack_Draw:
     db $44
     db $44
   .properties
-    db $7D
     db $3D
+    db $7D
     db $FD
     db $BD
 }
+
+; =========================================================