feat: change head facing direction on input

Corrects the input handling code to actually skip when the button is not
pressed

.gitignore

@@ -0,0 +1,2 @@
+zig-cache/
+zig-out/

build.zig

@@ -0,0 +1,57 @@
+const std = @import("std");
+
+pub fn build(b: *std.Build) !void {
+    const target = b.standardTargetOptions(.{});
+    const optimize = b.standardOptimizeOption(.{});
+
+    const rgbds = b.dependency("rgbds", .{
+        .target = target,
+        .optimize = optimize,
+    });
+
+    const convert_tiles = b.addRunArtifact(rgbds.artifact("rgbgfx"));
+    convert_tiles.addArg("-u");
+    convert_tiles.addFileArg(.{ .path = "tilemap.png" });
+    convert_tiles.addArg("-o");
+    const tileset_bin = convert_tiles.addOutputFileArg("tileset.2bpp");
+    convert_tiles.addArg("-t");
+    const tileset_map = convert_tiles.addOutputFileArg("tileset.tilemap");
+
+    const convert_sprites = b.addRunArtifact(rgbds.artifact("rgbgfx"));
+    convert_sprites.addArg("-u");
+    convert_sprites.addFileArg(.{ .path = "sprites.png" });
+    convert_sprites.addArg("-o");
+    const sprites_bin = convert_sprites.addOutputFileArg("sprites.2bpp");
+
+    const assemble = b.addRunArtifact(rgbds.artifact("rgbasm"));
+    assemble.addArg("-L");
+    assemble.addArg("-o");
+    const main_obj = assemble.addOutputFileArg("main.o");
+    assemble.addFileArg(.{ .path = "main.asm" });
+
+    assemble.addArg("--include");
+    assemble.addDirectoryArg(tileset_bin.dirname());
+
+    assemble.addArg("--include");
+    assemble.addDirectoryArg(tileset_map.dirname());
+
+    assemble.addArg("--include");
+    assemble.addDirectoryArg(sprites_bin.dirname());
+
+    const link = b.addRunArtifact(rgbds.artifact("rgblink"));
+    link.addArg("-o");
+    const rom = link.addOutputFileArg("3dp.gb");
+    link.addFileArg(main_obj);
+
+    const fix = b.addRunArtifact(rgbds.artifact("rgbfix"));
+    fix.addArg("-v");
+    fix.addArg("-p");
+    fix.addArg("0xFF");
+    fix.addFileArg(rom);
+
+    const install_file = b.addInstallFile(rom, "3dp.gb");
+    install_file.step.dependOn(&fix.step);
+
+    const install = b.getInstallStep();
+    install.dependOn(&install_file.step);
+}

build.zig.zon

@@ -0,0 +1,13 @@
+.{
+    .name = "gb3dplatformer",
+    .version = "0.0.0",
+    .dependencies = .{
+        .rgbds = .{
+            .url = "https://github.com/desttinghim/rgbds/archive/544aa4c532502f6d093670c4d71513a41bd7008b.tar.gz",
+            .hash = "122064f45d9be6a65a8ae36e92789b33443143eedaa8169bfc07372a8e409c67f17e",
+        },
+    },
+    .paths = .{
+        "",
+    },
+}

cat.2bpp

@@ -1 +0,0 @@
-＝鉗<EFBFBD>叺･<EFBFBD>⊥･fZ<<

main.asm

@@ -7,7 +7,7 @@ SECTION "Header", ROM0[$100]
 
 	ds $150 - @, 0 ; Make room for the header
 
-SECTION "Init", ROM0
+SECTION "Main", ROM0
 Init:
 	; Shut down audio circuitry
 	ld a, 0
@@ -27,42 +27,48 @@ WaitVBlank:
 	call InitSprObjLib
 
 	; Reset hardware OAM
-	xor a, a
+	ld a, 0
 	ld b, 160
 	ld hl, _OAMRAM
 .resetOAM
 	ld [hli], a
 	dec b
-	jr nz, .resetOAM
+	jp nz, .resetOAM
 
 	; Copy cat sprite
-	ld de, GfxCat
+	ld de, Sprites
 	ld hl, $8000
-	ld bc, GfxCat.end - GfxCat
+	ld bc, Sprites.end - Sprites
 	call Memcopy
 
 	; Reset positions
-	ld hl, wSimplePosition
-	ld a, 8
-	ld [hl], a
+	ld d, 0
+	ld hl, wMetaspriteBegin
+	ld bc, wMetaspriteEnd - wMetaspriteBegin
+	call Memset
 
-	ld hl, wMetaspritePosition
-	ld a, 0
-	ld [wMetaspritePosition], a
-	ld a, $80
-	ld [wMetaspritePosition + 1], a
+	; Clear player data
+	ld a, $05
+	ld [wMetaspritePosition.x+1], a 
+	ld [wMetaspritePosition.y+1], a
 
 	; Copy the tile data
 	ld de, Tiles
 	ld hl, $9000
-	ld bc, TilesEnd - Tiles
+	ld bc, Tiles.end - Tiles
 	call Memcopy
 
-	; Copy the tilemap
-	ld de, Tilemap
+	; Clear the tilemap
 	ld hl, $9800
-	ld bc, TilemapEnd - Tilemap
-	call Memcopy
+	ld bc, (32 * 20)
+	ld d, 0
+	call Memset
+
+	; Clear shadown OAM
+	ld hl, wShadowOAM
+	ld bc, 160
+	ld d, 0
+	call Memset
 
 	; Turn the LCD on
 	ld a, LCDCF_ON | LCDCF_BGON | LCDCF_OBJON | LCDCF_OBJ8
@@ -82,35 +88,326 @@ WaitVBlank:
 	ldh [rIF], a
 	; Enable interrupts 
 	ei
+	jp Main
 
-Main:
+Main::
 	call ResetShadowOAM
-
-	ld de, $0100
-	ld c, 8
-	ld b, 16
-	call RenderSimpleSprite
-
-	ld hl, wSimplePosition
-	inc [hl]
-
-	ld bc, (96.0 >> 12) & $FFFF
-	ld a, [wMetaspritePosition]
-	ld e, a
-	ld a, [wMetaspritePosition + 1]
-	ld d, a
-	ld hl, CatMetasprite
-	call RenderMetasprite
-
-	ldh a, [hFrameCounter]
-	inc a
-	ldh [hFrameCounter], a 
+	call UpdateJoypadState
+	call HandleInput
+	call HandlePhysics
+	call HandleRender
 
 	halt
 	nop
 
 	jp Main
  
+HandleInput::
+	ld a, [wJoypadState]
+	bit PADB_LEFT, a
+	jr z, .leftend
+
+	ld a, PlayerHead.left - PlayerHead
+	ld [wMetaspritePosition.whichHead], a
+
+	ld a, [wMetaspritePosition.x]
+	sub a, 16
+	ld b, a
+	ld [wMetaspritePosition.x], a
+	ld a, [wMetaspritePosition.x+1]
+	sbc 0
+	ld c, a
+	ld [wMetaspritePosition.x+1], a
+.leftend:
+
+	ld a, [wJoypadState]
+	bit PADB_RIGHT, a
+	jr z, .rightend
+
+	ld a, PlayerHead.right - PlayerHead
+	ld [wMetaspritePosition.whichHead], a
+
+	ld a, [wMetaspritePosition.x]
+	add a, 16
+	ld b, a
+	ld [wMetaspritePosition.x], a
+	ld a, [wMetaspritePosition.x+1]
+	adc 0
+	ld c, a
+	ld [wMetaspritePosition.x+1], a
+.rightend:
+
+	ld a, [wJoypadState]
+	bit PADB_UP, a
+	jr z, .upend
+
+	ld a, PlayerHead.up - PlayerHead
+	ld [wMetaspritePosition.whichHead], a
+
+	ld a, [wMetaspritePosition.y]
+	sub a, 16
+	ld b, a
+	ld [wMetaspritePosition.y], a
+	ld a, [wMetaspritePosition.y+1]
+	sbc 0
+	ld c, a
+	ld [wMetaspritePosition.y+1], a
+.upend:
+ 
+	ld a, [wJoypadState]
+	bit PADB_DOWN, a
+	jr z, .downend
+
+	ld a, PlayerHead.down - PlayerHead
+	ld [wMetaspritePosition.whichHead], a
+
+	ld a, [wMetaspritePosition.y]
+	add a, 16
+	ld b, a
+	ld [wMetaspritePosition.y], a
+	ld a, [wMetaspritePosition.y+1]
+	adc 0
+	ld c, a
+	ld [wMetaspritePosition.y+1], a
+.downend: 
+
+	; Skip jump code if not on ground
+	ld a, [wMetaspritePosition.z]
+	ld b, a
+	ld a, [wMetaspritePosition.z + 1]
+	or a, b
+	jr nz, .jumpend
+
+	; While on ground, set boost
+	ld a, $8
+	ld [wMetaspriteVelocity.boost], a
+
+	ld a, [wJoypadPressed]
+	bit PADB_A, a
+	jr z, .boostclear
+
+	ld a, [wMetaspriteVelocity.z]
+	sub a, $20
+	ld b, a
+	ld [wMetaspriteVelocity.z], a
+	ld a, [wMetaspriteVelocity.z+1]
+	sbc a, $00
+	ld c, a
+	ld [wMetaspriteVelocity.z+1], a 
+	jr .boostend
+.jumpend:
+	ld a, [wJoypadState]
+	bit PADB_A, a
+	jr z, .boostclear
+	ld a, $FF
+	ld [wMetaspriteVelocity.boosting], a
+	jr .boostend
+.boostclear:
+	ld a, $00
+	ld [wMetaspriteVelocity.boosting], a 
+.boostend:
+
+	ret
+
+HandleRender::
+	; Calculate current frame for player
+	ld a, [hFrameCounter]
+	and a, %0000_0111
+	cp a, 0
+	jr nz, .skipAnim
+
+	ld a, [wMetaspritePosition.frame]
+	inc a
+	cp PlayerTorso.framesEnd - PlayerTorso.framesStart
+	jr nz, .skipAnimReset
+	ld a, 0
+.skipAnimReset
+	ld [wMetaspritePosition.frame], a
+.skipAnim
+
+	; load de
+	ld a, [wMetaspritePosition.x]
+	ld e, a
+	ld a, [wMetaspritePosition.x + 1]
+	ld d, a
+
+	; load bc
+	ld a, [wMetaspritePosition.z]
+	ld c, a
+	ld a, [wMetaspritePosition.y]
+	add a, c
+	ld c, a
+	ld a, [wMetaspritePosition.z + 1]
+	ld b, a
+	ld a, [wMetaspritePosition.y + 1]
+	adc a, b
+	ld b, a
+
+	; Add frameOffset
+	ld hl, PlayerTorso.framesStart
+	ld a, [wMetaspritePosition.frame]
+	add a, l
+	ld l, a
+	jr nc, .noCarry1
+	inc h
+.noCarry1
+	ld a, [hl]
+
+	ld hl, PlayerTorso
+	add a, l
+	ld l, a
+	jr nc, .noCarry2
+	inc h
+.noCarry2 
+	call RenderMetasprite
+
+ 	; Render player head
+	; load de
+	ld a, [wMetaspritePosition.x]
+	ld e, a
+	ld a, [wMetaspritePosition.x + 1]
+	ld d, a
+
+	; load bc
+	ld a, [wMetaspritePosition.z]
+	ld c, a
+	ld a, [wMetaspritePosition.y]
+	add a, c
+	ld c, a
+	ld a, [wMetaspritePosition.z + 1]
+	ld b, a
+	ld a, [wMetaspritePosition.y + 1]
+	adc a, b
+	ld b, a
+
+	; load hl
+	ld hl, PlayerHead
+	ld a, [wMetaspritePosition.whichHead]
+	add a, l
+	ld l, a
+	jr nc, .noCarry3
+	inc h
+.noCarry3
+	call RenderMetasprite 
+
+	; Render the shadow
+	; load de
+	ld a, [wMetaspritePosition.x]
+	ld e, a
+	ld a, [wMetaspritePosition.x + 1]
+	ld d, a
+
+	; load bc
+	ld a, [wMetaspritePosition.y]
+	ld c, a
+	ld a, [wMetaspritePosition.y + 1]
+	ld b, a
+
+	ld hl, ShadowMetasprite
+	call RenderMetasprite
+	ret
+
+HandlePhysics::
+
+	; Skip gravity if on ground
+	ld a, [wMetaspritePosition.z]
+	ld b, a
+	ld a, [wMetaspritePosition.z + 1]
+	or a, b
+	jr z, .endGravity
+
+	; Skip gravity if boosting
+	ld a, [wMetaspriteVelocity.boosting]
+	ld b, a
+	ld a, [wMetaspriteVelocity.boost]
+	and a, b
+	cp 0 
+	jr z, .startGravity
+	ld a, [wMetaspriteVelocity.boost]
+	dec a
+	ld [wMetaspriteVelocity.boost], a
+	jr .endGravity
+
+.startGravity
+	; Apply gravity
+	ld a, [wMetaspriteVelocity.z]
+	add a, $04
+	ld [wMetaspriteVelocity.z], a
+	ld a, [wMetaspriteVelocity.z+1]
+	adc a, $00
+	ld [wMetaspriteVelocity.z+1], a
+.endGravity:
+ 
+
+	; Calculate new z, place in bc
+	ld a, [wMetaspriteVelocity.z]
+	ld c, a
+	ld a, [wMetaspritePosition.z]
+	add c
+	ld c, a
+	ld a, [wMetaspriteVelocity.z + 1]
+	ld b, a
+	ld a, [wMetaspritePosition.z + 1]
+	adc b
+	ld b, a
+
+	; If z is greater than or equal to 0, pos/vel to 0
+	jr nz, .endLanding
+	jr nc, .endLanding
+.startLanding
+	ld a, 0
+	ld [wMetaspritePosition.z], a
+	ld [wMetaspritePosition.z+1], a
+	ld [wMetaspriteVelocity.z], a
+	ld [wMetaspriteVelocity.z+1], a
+	ld b, a
+	ld c, a
+.endLanding
+
+	; Update z position
+	ld a, c
+	ld [wMetaspritePosition.z], a
+	ld a, b
+	ld [wMetaspritePosition.z+1], a
+
+	ret
+
+SECTION "Joypad Routine", ROM0
+UpdateJoypadState::
+	ld hl, rP1
+	ld [hl], P1F_GET_BTN
+	; Read button state twice to ensure we get the proper state
+	ld a, [hl]
+	ld a, [hl]
+	ld [hl], P1F_GET_DPAD
+	cpl ; Inputs are active low - inv so it makes more sense
+	and PADF_A | PADF_B | PADF_SELECT | PADF_START
+	ld c, a ; Store lower 4 button bits in c
+
+	; On real hardware, rP1 needs to be read 8 times to ensure proper state is read
+	ld b, 8
+.dpadDebounceLoop:
+	ld a, [hl]
+	dec b
+	jr nz, .dpadDebounceLoop
+	ld [hl], P1F_GET_NONE ; Disable joypad inputs
+
+	swap a ; Swap the nibbles to store dpad in upper 4 bits
+	cpl    ; inv the bits
+	and PADF_RIGHT | PADF_LEFT | PADF_UP | PADF_DOWN
+	or c
+	ld c, a
+
+	; Compare with previously stored state
+	ld hl, wJoypadState
+	xor [hl]
+	and c
+	ld [wJoypadPressed], a
+	ld a, c
+	ld [wJoypadState], a
+	ret
+
+SECTION "Memcopy Routine", ROM0
 Memcopy::
 	dec bc
 	inc b
@@ -125,6 +422,22 @@ Memcopy::
 	jr nz, .loop
 	ret  
 
+; @param hl - Location
+; @param bc - Length
+; @param d - Value
+SECTION "Memset Routine", ROM0
+Memset::
+	dec bc
+	inc b
+	inc c
+.loop:
+	ld a, d
+	ld [hli], a
+	dec c
+	jr nz, .loop
+	dec b
+	jr nz, .loop
+	ret  
 
 SECTION "VBlank Interrupt", ROM0[$0040]
 VBlankInterrupt:
@@ -137,22 +450,13 @@ VBlankInterrupt:
 
 SECTION "VBlank Handler", ROM0
 VBlankHandler:
-	ldh a, [hFrameCounter]
-
-	/*
-	bit 5, a
-
-	ld a, %11100100
-
-	jr z, .skipCpl
-	cpl ; Invert a
-.skipCpl:
-	ldh [rBGP], a
-	*/
-
 	ld a, HIGH(wShadowOAM)
 	call hOAMDMA
 
+	ldh a, [hFrameCounter]
+	inc a
+	ldh [hFrameCounter], a
+
 	; Reset registers to orignal state
 	pop hl
 	pop de
@@ -164,126 +468,90 @@ SECTION "Frame Counter", HRAM
 hFrameCounter: 
 	db
 
-
 SECTION "Tile data", ROM0
 
 Tiles:
-	db $00,$ff, $00,$ff, $00,$ff, $00,$ff, $00,$ff, $00,$ff, $00,$ff, $00,$ff
-	db $00,$ff, $00,$80, $00,$80, $00,$80, $00,$80, $00,$80, $00,$80, $00,$80
-	db $00,$ff, $00,$7e, $00,$7e, $00,$7e, $00,$7e, $00,$7e, $00,$7e, $00,$7e
-	db $00,$ff, $00,$01, $00,$01, $00,$01, $00,$01, $00,$01, $00,$01, $00,$01
-	db $00,$ff, $00,$00, $00,$00, $00,$00, $00,$00, $00,$00, $00,$00, $00,$00
-	db $00,$ff, $00,$7f, $00,$7f, $00,$7f, $00,$7f, $00,$7f, $00,$7f, $00,$7f
-	db $00,$ff, $03,$fc, $00,$f8, $00,$f0, $00,$e0, $20,$c0, $00,$c0, $40,$80
-	db $00,$ff, $c0,$3f, $00,$1f, $00,$0f, $00,$07, $04,$03, $00,$03, $02,$01
-	db $00,$80, $00,$80, $7f,$80, $00,$80, $00,$80, $7f,$80, $7f,$80, $00,$80
-	db $00,$7e, $2a,$7e, $d5,$7e, $2a,$7e, $54,$7e, $ff,$00, $ff,$00, $00,$00
-	db $00,$01, $00,$01, $ff,$01, $00,$01, $01,$01, $fe,$01, $ff,$01, $00,$01
-	db $00,$80, $80,$80, $7f,$80, $80,$80, $00,$80, $ff,$80, $7f,$80, $80,$80
-	db $00,$7f, $2a,$7f, $d5,$7f, $2a,$7f, $55,$7f, $ff,$00, $ff,$00, $00,$00
-	db $00,$ff, $aa,$ff, $55,$ff, $aa,$ff, $55,$ff, $fa,$07, $fd,$07, $02,$07
-	db $00,$7f, $2a,$7f, $d5,$7f, $2a,$7f, $55,$7f, $aa,$7f, $d5,$7f, $2a,$7f
-	db $00,$ff, $80,$ff, $00,$ff, $80,$ff, $00,$ff, $80,$ff, $00,$ff, $80,$ff
-	db $40,$80, $00,$80, $7f,$80, $00,$80, $00,$80, $7f,$80, $7f,$80, $00,$80
-	db $00,$3c, $02,$7e, $85,$7e, $0a,$7e, $14,$7e, $ab,$7e, $95,$7e, $2a,$7e
-	db $02,$01, $00,$01, $ff,$01, $00,$01, $01,$01, $fe,$01, $ff,$01, $00,$01
-	db $00,$ff, $80,$ff, $50,$ff, $a8,$ff, $50,$ff, $a8,$ff, $54,$ff, $a8,$ff
-	db $7f,$80, $7f,$80, $7f,$80, $7f,$80, $7f,$80, $7f,$80, $7f,$80, $7f,$80
-	db $ff,$00, $ff,$00, $ff,$00, $ab,$7e, $d5,$7e, $ab,$7e, $d5,$7e, $ab,$7e
-	db $ff,$01, $fe,$01, $ff,$01, $fe,$01, $ff,$01, $fe,$01, $ff,$01, $fe,$01
-	db $7f,$80, $ff,$80, $7f,$80, $ff,$80, $7f,$80, $ff,$80, $7f,$80, $ff,$80
-	db $ff,$00, $ff,$00, $ff,$00, $aa,$7f, $d5,$7f, $aa,$7f, $d5,$7f, $aa,$7f
-	db $f8,$07, $f8,$07, $f8,$07, $80,$ff, $00,$ff, $aa,$ff, $55,$ff, $aa,$ff
-	db $7f,$80, $7f,$80, $7f,$80, $7f,$80, $7f,$80, $ff,$80, $7f,$80, $ff,$80
-	db $d5,$7f, $aa,$7f, $d5,$7f, $aa,$7f, $d5,$7f, $aa,$7f, $d5,$7f, $aa,$7f
-	db $d5,$7e, $ab,$7e, $d5,$7e, $ab,$7e, $d5,$7e, $ab,$7e, $d5,$7e, $eb,$3c
-	db $54,$ff, $aa,$ff, $54,$ff, $aa,$ff, $54,$ff, $aa,$ff, $54,$ff, $aa,$ff
-	db $7f,$80, $7f,$80, $7f,$80, $7f,$80, $7f,$80, $7f,$80, $7f,$80, $00,$ff
-	db $d5,$7e, $ab,$7e, $d5,$7e, $ab,$7e, $d5,$7e, $ab,$7e, $d5,$7e, $2a,$ff
-	db $ff,$01, $fe,$01, $ff,$01, $fe,$01, $ff,$01, $fe,$01, $ff,$01, $80,$ff
-	db $7f,$80, $ff,$80, $7f,$80, $ff,$80, $7f,$80, $ff,$80, $7f,$80, $aa,$ff
-	db $ff,$00, $ff,$00, $ff,$00, $ff,$00, $ff,$00, $ff,$00, $ff,$00, $2a,$ff
-	db $ff,$01, $fe,$01, $ff,$01, $fe,$01, $fe,$01, $fe,$01, $fe,$01, $80,$ff
-	db $7f,$80, $ff,$80, $7f,$80, $7f,$80, $7f,$80, $7f,$80, $7f,$80, $00,$ff
-	db $fe,$01, $fe,$01, $fe,$01, $fe,$01, $fe,$01, $fe,$01, $fe,$01, $80,$ff
-	db $3f,$c0, $3f,$c0, $3f,$c0, $1f,$e0, $1f,$e0, $0f,$f0, $03,$fc, $00,$ff
-	db $fd,$03, $fc,$03, $fd,$03, $f8,$07, $f9,$07, $f0,$0f, $c1,$3f, $82,$ff
-	db $55,$ff, $2a,$7e, $54,$7e, $2a,$7e, $54,$7e, $2a,$7e, $54,$7e, $00,$7e
-	db $01,$ff, $00,$01, $01,$01, $00,$01, $01,$01, $00,$01, $01,$01, $00,$01
-	db $54,$ff, $ae,$f8, $50,$f0, $a0,$e0, $60,$c0, $80,$c0, $40,$80, $40,$80
-	db $55,$ff, $00,$00, $00,$00, $00,$00, $00,$00, $00,$00, $00,$00, $00,$00
-	db $55,$ff, $6a,$1f, $05,$0f, $02,$07, $05,$07, $02,$03, $03,$01, $02,$01
-	db $54,$ff, $80,$80, $00,$80, $80,$80, $00,$80, $80,$80, $00,$80, $00,$80
-	db $55,$ff, $2a,$1f, $0d,$07, $06,$03, $01,$03, $02,$01, $01,$01, $00,$01
-	db $55,$ff, $2a,$7f, $55,$7f, $2a,$7f, $55,$7f, $2a,$7f, $55,$7f, $00,$7f
-	db $55,$ff, $aa,$ff, $55,$ff, $aa,$ff, $55,$ff, $aa,$ff, $55,$ff, $00,$ff
-	db $15,$ff, $00,$00, $00,$00, $00,$00, $00,$00, $00,$00, $00,$00, $00,$00
-	db $55,$ff, $6a,$1f, $0d,$07, $06,$03, $01,$03, $02,$01, $03,$01, $00,$01
-	db $54,$ff, $a8,$ff, $54,$ff, $a8,$ff, $50,$ff, $a0,$ff, $40,$ff, $00,$ff
-	db $00,$7e, $2a,$7e, $d5,$7e, $2a,$7e, $54,$7e, $ab,$76, $dd,$66, $22,$66
-	db $00,$7c, $2a,$7e, $d5,$7e, $2a,$7e, $54,$7c, $ff,$00, $ff,$00, $00,$00
-	db $00,$01, $00,$01, $ff,$01, $02,$01, $07,$01, $fe,$03, $fd,$07, $0a,$0f
-	db $00,$7c, $2a,$7e, $d5,$7e, $2a,$7e, $54,$7e, $ab,$7e, $d5,$7e, $2a,$7e
-	db $00,$ff, $a0,$ff, $50,$ff, $a8,$ff, $54,$ff, $a8,$ff, $54,$ff, $aa,$ff
-	db $dd,$62, $bf,$42, $fd,$42, $bf,$40, $ff,$00, $ff,$00, $f7,$08, $ef,$18
-	db $ff,$00, $ff,$00, $ff,$00, $ab,$7c, $d5,$7e, $ab,$7e, $d5,$7e, $ab,$7e
-	db $f9,$07, $fc,$03, $fd,$03, $fe,$01, $ff,$01, $fe,$01, $ff,$01, $fe,$01
-	db $d5,$7e, $ab,$7e, $d5,$7e, $ab,$7e, $d5,$7e, $ab,$7e, $d5,$7e, $ab,$7c
-	db $f7,$18, $eb,$1c, $d7,$3c, $eb,$3c, $d5,$3e, $ab,$7e, $d5,$7e, $2a,$ff
-	db $ff,$01, $fe,$01, $ff,$01, $fe,$01, $ff,$01, $fe,$01, $ff,$01, $a2,$ff
-	db $7f,$c0, $bf,$c0, $7f,$c0, $bf,$e0, $5f,$e0, $af,$f0, $57,$fc, $aa,$ff
-	db $ff,$01, $fc,$03, $fd,$03, $fc,$03, $f9,$07, $f0,$0f, $c1,$3f, $82,$ff
-	db $55,$ff, $2a,$ff, $55,$ff, $2a,$ff, $55,$ff, $2a,$ff, $55,$ff, $00,$ff
-	db $45,$ff, $a2,$ff, $41,$ff, $82,$ff, $41,$ff, $80,$ff, $01,$ff, $00,$ff
-	db $54,$ff, $aa,$ff, $54,$ff, $aa,$ff, $54,$ff, $aa,$ff, $54,$ff, $00,$ff
-	db $15,$ff, $2a,$ff, $15,$ff, $0a,$ff, $15,$ff, $0a,$ff, $01,$ff, $00,$ff
-	db $01,$ff, $80,$ff, $01,$ff, $80,$ff, $01,$ff, $80,$ff, $01,$ff, $00,$ff
-TilesEnd:
+	INCBIN "tileset.2bpp"
+.end:
 
 SECTION "Tilemap", ROM0
 
 Tilemap:
-	db $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00,  0,0,0,0,0,0,0,0,0,0,0,0
-	db $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00,  0,0,0,0,0,0,0,0,0,0,0,0
-	db $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00,  0,0,0,0,0,0,0,0,0,0,0,0
-	db $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00,  0,0,0,0,0,0,0,0,0,0,0,0
-	db $00, $00, $01, $02, $03, $01, $04, $03, $01, $05, $00, $01, $05, $00, $06, $04, $07, $00, $00, $00,  0,0,0,0,0,0,0,0,0,0,0,0
-	db $00, $00, $08, $09, $0a, $0b, $0c, $0d, $0b, $0e, $0f, $08, $0e, $0f, $10, $11, $12, $13, $00, $00,  0,0,0,0,0,0,0,0,0,0,0,0
-	db $00, $00, $14, $15, $16, $17, $18, $19, $1a, $1b, $0f, $14, $1b, $0f, $14, $1c, $16, $1d, $00, $00,  0,0,0,0,0,0,0,0,0,0,0,0
-	db $00, $00, $1e, $1f, $20, $21, $22, $23, $24, $22, $25, $1e, $22, $25, $26, $22, $27, $1d, $00, $00,  0,0,0,0,0,0,0,0,0,0,0,0
-	db $00, $00, $01, $28, $29, $2a, $2b, $2c, $2d, $2b, $2e, $2d, $2f, $30, $2d, $31, $32, $33, $00, $00,  0,0,0,0,0,0,0,0,0,0,0,0
-	db $00, $00, $08, $34, $0a, $0b, $11, $0a, $0b, $35, $36, $0b, $0e, $0f, $08, $37, $0a, $38, $00, $00,  0,0,0,0,0,0,0,0,0,0,0,0
-	db $00, $00, $14, $39, $16, $17, $1c, $16, $17, $3a, $3b, $17, $1b, $0f, $14, $3c, $16, $1d, $00, $00,  0,0,0,0,0,0,0,0,0,0,0,0
-	db $00, $00, $1e, $3d, $3e, $3f, $22, $27, $21, $1f, $20, $21, $22, $25, $1e, $22, $40, $1d, $00, $00,  0,0,0,0,0,0,0,0,0,0,0,0
-	db $00, $00, $00, $41, $42, $43, $44, $30, $33, $41, $45, $43, $41, $30, $43, $41, $30, $33, $00, $00,  0,0,0,0,0,0,0,0,0,0,0,0
-	db $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00,  0,0,0,0,0,0,0,0,0,0,0,0
-	db $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00,  0,0,0,0,0,0,0,0,0,0,0,0
-	db $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00,  0,0,0,0,0,0,0,0,0,0,0,0
-	db $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00,  0,0,0,0,0,0,0,0,0,0,0,0
-	db $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00,  0,0,0,0,0,0,0,0,0,0,0,0
+	INCBIN "tileset.tilemap"
 TilemapEnd:
 
+
 SECTION "Graphics", ROM0
-GfxCat:
-  INCBIN "cat.2bpp"
+Sprites:
+	INCBIN "sprites.2bpp"
 .end::
 
-CatMetasprite:
-  db 16, 8, 0, 0
-  db 12, 16, 0, 0
-  db 20, 20, 0, 0
-  db 24, 12, 0, 0
+ShadowMetasprite:
+	db 12, 0, 1, 0
 	db 128
 
-SECTION "Position Vars", WRAM0
-; 8-bit X position
-wSimplePosition:
-  ds 1
+PlayerHead:
+.down:
+	db 0, 0, 2, 0
+	db 128
+.right:
+	db 0, 0, 3, 0
+	db 128
+.up:
+	db 0, 0, 4, 0
+	db 128
+.left:
+	db 0, 0, 3, OAMF_XFLIP
+	db 128
 
+PlayerTorso:
+.vWalk1:
+	db 8, 0, 5, 0
+	db 128
+.vWalk2:
+	db 8, 0, 6, 0
+	db 128
+.vWalk3:
+	db 8, 0, 6, OAMF_XFLIP
+	db 128
+.framesStart
+	db .vWalk1 - PlayerTorso
+	db .vWalk2 - PlayerTorso
+	db .vWalk1 - PlayerTorso
+	db .vWalk3 - PlayerTorso
+.framesEnd
+
+SECTION "Position Vars", WRAM0 
+wMetaspriteBegin:
 ; Q12.4 fixed-point X posiition
-wMetaspritePosition:
+wMetaspritePosition::
+.x:
 	dw
+.y:
+	dw
+.z:
+	dw
+.frame:
+	db
+.whichHead:
+	db
 
 ; Q4.4 fixed-point velocity
 wMetaspriteVelocity::
+.x:
+	dw
+.y:
+	dw
+.z:
+	dw
+.boost:
 	db
+.boosting:
+	db
+ wMetaspriteEnd:
+
+SECTION "Joypad Vars", WRAM0
+wJoypadState:
+	ds 1
+wJoypadPressed:
+	ds 1