oracle-of-secrets/Sprites/Objects/switch_track.asm

; =========================================================
; Sprite Properties
; =========================================================

!SPRID              = $B0 ; The sprite ID you are overwriting (HEX)
!NbrTiles           = 02  ; Number of tiles used in a frame
!Harmless           = 00  ; 00 = Sprite is Harmful,  01 = Sprite is Harmless
!HVelocity          = 00  ; Is your sprite going super fast? put 01 if it is
!Health             = 01  ; 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      = 00  ; 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             = 00  ; 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_RotatingTrack_Prep, Sprite_RotatingTrack_Long);

; =========================================================

Sprite_RotatingTrack_Long:
{
  PHB : PHK : PLB

  JSR Sprite_RotatingTrack_Draw ; Call the draw code
  JSL Sprite_CheckActive   ; Check if game is not paused
  BCC .SpriteIsNotActive   ; Skip Main code is sprite is innactive

  JSR Sprite_RotatingTrack_Main ; Call the main sprite code

  .SpriteIsNotActive
  PLB ; Get back the databank we stored previously
  RTL ; Go back to original code
}

; =========================================================

Sprite_RotatingTrack_Prep:
{
  PHB : PHK : PLB

  LDA.b #$80 : STA $0CAA, X
  LDA SprSubtype, X : STA.w SprAction,X
   
  PLB
  RTL
}

; =========================================================
; Modes
; 0 = TopLeft -> TopRight
; 1 = TopRight -> BottomRight
; 2 = BottomRight -> BottomLeft
; 3 = BottomLeft -> TopLeft
; 4 = TopRight -> TopLeft

SwitchRam = $37

Sprite_RotatingTrack_Main:
{
  LDA.w SprAction, X
  JSL UseImplicitRegIndexedLocalJumpTable
  
  dw TopLeftToTopRight
  dw TopRightToBottomRight
  dw BottomRightToBottomLeft
  dw BottomLeftToTopLeft
  dw TopRightToTopLeft

  ; -------------------------------------------------------
  ; 00 = TopLeft -> TopRight
  TopLeftToTopRight:
  {
    LDA SwitchRam : BNE part2
      %PlayAnimation(0,0,4)
    part2:
    %PlayAnimation(1,1,4)
    RTS
  }

  ; -------------------------------------------------------
  ; 01 = TopRight -> BottomRight
  TopRightToBottomRight:
  {
    LDA SwitchRam : BNE part2_a
      %PlayAnimation(1,1,4)
    part2_a:
    %PlayAnimation(2,2,4)
    RTS
  }

  ; -------------------------------------------------------
  ; 02 = BottomRight -> BottomLeft
  BottomRightToBottomLeft:
  {
    LDA SwitchRam : BNE part2_b
      %PlayAnimation(2,2,4)
    part2_b:
    %PlayAnimation(3,3,4)
    RTS
  }

  ; -------------------------------------------------------
  ; 03 = BottomLeft -> TopLeft
  BottomLeftToTopLeft:
  {
    LDA SwitchRam : BNE part2_c
      %PlayAnimation(3,3,4)
    part2_c:
    %PlayAnimation(0,0,4)
    RTS
  }

  ; -------------------------------------------------------
  ; 04 = TopRight -> TopLeft
  TopRightToTopLeft:
  {
    LDA SwitchRam : BNE part2_d
      %StartOnFrame(1)
      %PlayAnimation(1,1,4)
    part2_d:
    %StartOnFrame(0)
    %PlayAnimation(0,0,4)
    RTS
  }
}

; =========================================================

Sprite_RotatingTrack_Draw:
{
    JSL Sprite_PrepOamCoord
    JSL Sprite_OAM_AllocateDeferToPlayer

    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 : 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_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.b #$02 : ORA $0F : STA ($92), Y ; store size in oam buffer
        
    PLY : INY
        
    PLX : DEX : BPL .nextTile

    PLX

    RTS


  .start_index
    db $00, $01, $02, $03
  .nbr_of_tiles
    db 0, 0, 0, 0
  .chr
    db $44
    db $44
    db $44
    db $44
  .properties
    db $7D
    db $3D
    db $FD
    db $BD
}