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-rw-r--r--engine/overworld/oam.asm189
1 files changed, 0 insertions, 189 deletions
diff --git a/engine/overworld/oam.asm b/engine/overworld/oam.asm
deleted file mode 100644
index 68128413..00000000
--- a/engine/overworld/oam.asm
+++ /dev/null
@@ -1,189 +0,0 @@
-PrepareOAMData::
-; Determine OAM data for currently visible
-; sprites and write it to wOAMBuffer.
-
- ld a, [wUpdateSpritesEnabled]
- dec a
- jr z, .updateEnabled
-
- cp -1
- ret nz
- ld [wUpdateSpritesEnabled], a
- jp HideSprites
-
-.updateEnabled
- xor a
- ld [hOAMBufferOffset], a
-
-.spriteLoop
- ld [hSpriteOffset2], a
-
- ld d, wSpriteStateData1 / $100
- ld a, [hSpriteOffset2]
- ld e, a
- ld a, [de] ; c1x0
- and a
- jp z, .nextSprite
-
- inc e
- inc e
- ld a, [de] ; c1x2 (facing/anim)
- ld [wd5cd], a
- cp $ff ; off-screen (don't draw)
- jr nz, .visible
-
- call GetSpriteScreenXY
- jr .nextSprite
-
-.visible
- cp $a0 ; is the sprite unchanging like an item ball or boulder?
- jr c, .usefacing
-
-; unchanging
- and $f
- add $10 ; skip to the second half of the table which doesn't account for facing direction
- jr .next
-
-.usefacing
- and $f
-
-.next
- ld l, a
-
-; get sprite priority
- push de
- inc d
- ld a, e
- add $5
- ld e, a
- ld a, [de] ; c2x7
- and $80
- ld [hSpritePriority], a ; temp store sprite priority
- pop de
-
-; read the entry from the table
- ld h, 0
- ld bc, SpriteFacingAndAnimationTable
- add hl, hl
- add hl, hl
- add hl, bc
- ld a, [hli]
- ld c, a
- ld a, [hli]
- ld b, a
- ld a, [hli]
- ld h, [hl]
- ld l, a
-
- call GetSpriteScreenXY
-
- ld a, [hOAMBufferOffset]
- ld e, a
- ld d, wOAMBuffer / $100
-
-.tileLoop
- ld a, [hSpriteScreenY] ; temp for sprite Y position
- add $10 ; Y=16 is top of screen (Y=0 is invisible)
- add [hl] ; add Y offset from table
- ld [de], a ; write new sprite OAM Y position
- inc hl
- ld a, [hSpriteScreenX] ; temp for sprite X position
- add $8 ; X=8 is left of screen (X=0 is invisible)
- add [hl] ; add X offset from table
- inc e
- ld [de], a ; write new sprite OAM X position
- inc e
- ld a, [bc] ; read pattern number offset (accommodates orientation (offset 0,4 or 8) and animation (offset 0 or $80))
- inc bc
- push bc
- ld b, a
-
- ld a, [wd5cd] ; temp copy of c1x2
- swap a ; high nybble determines sprite used (0 is always player sprite, next are some npcs)
- and $f
-
- ; Sprites $a and $b have one face (and therefore 4 tiles instead of 12).
- ; As a result, sprite $b's tile offset is less than normal.
- cp $b
- jr nz, .notFourTileSprite
- ld a, $a * 12 + 4
- jr .next2
-
-.notFourTileSprite
- ; a *= 12
- sla a
- sla a
- ld c, a
- sla a
- add c
-
-.next2
- add b ; add the tile offset from the table (based on frame and facing direction)
- pop bc
- ld [de], a ; tile id
- inc hl
- inc e
- ld a, [hl]
- bit 1, a ; is the tile allowed to set the sprite priority bit?
- jr z, .skipPriority
- ld a, [hSpritePriority]
- or [hl]
-.skipPriority
- inc hl
- ld [de], a
- inc e
- bit 0, a ; OAMFLAG_ENDOFDATA
- jr z, .tileLoop
-
- ld a, e
- ld [hOAMBufferOffset], a
-
-.nextSprite
- ld a, [hSpriteOffset2]
- add $10
- cp $100 % $100
- jp nz, .spriteLoop
-
- ; Clear unused OAM.
- ld a, [hOAMBufferOffset]
- ld l, a
- ld h, wOAMBuffer / $100
- ld de, $4
- ld b, $a0
- ld a, [wd736]
- bit 6, a ; jumping down ledge or fishing animation?
- ld a, $a0
- jr z, .clear
-
-; Don't clear the last 4 entries because they are used for the shadow in the
-; jumping down ledge animation and the rod in the fishing animation.
- ld a, $90
-
-.clear
- cp l
- ret z
- ld [hl], b
- add hl, de
- jr .clear
-
-GetSpriteScreenXY:
- inc e
- inc e
- ld a, [de] ; c1x4
- ld [hSpriteScreenY], a
- inc e
- inc e
- ld a, [de] ; c1x6
- ld [hSpriteScreenX], a
- ld a, 4
- add e
- ld e, a
- ld a, [hSpriteScreenY]
- add 4
- and $f0
- ld [de], a ; c1xa (y)
- inc e
- ld a, [hSpriteScreenX]
- and $f0
- ld [de], a ; c1xb (x)
- ret