Apple-2gs-SW/iigs-game-engine
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Fix the mask values when enumerating through the sprite sheet

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This commit is contained in:
Lucas Scharenbroich 2022-02-18 16:20:07 -06:00
parent 260b2097c2
commit 95572fbf49
1 changed files with 8 additions and 72 deletions
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80
src/SpriteRender.s
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@ -2,6 +2,10 @@
;
; X = sprite index
_DrawSpriteSheet
DISP_VFLIP equ $0004 ; hard code these because they are internal values
DISP_HFLIP equ $0002
DISP_MASK equ $00F9
phx
lda _Sprites+VBUFF_ADDR,y
@ -11,7 +15,7 @@ _DrawSpriteSheet
sta tmp2
lda _Sprites+SPRITE_DISP,y
and #-{SPRITE_VFLIP+SPRITE_HFLIP} ; dispatch to all of the different orientations
and #DISP_MASK ; dispatch to all of the different orientations
sta tmp3
; Set bank
@ -25,7 +29,7 @@ _DrawSpriteSheet
jsr _DrawSprite
lda tmp3
ora #SPRITE_VFLIP
ora #DISP_VFLIP
tax
ldy tmp2
lda tmp1
@ -34,7 +38,7 @@ _DrawSpriteSheet
jsr _DrawSprite
lda tmp3
ora #SPRITE_HFLIP
ora #DISP_HFLIP
tax
ldy tmp2
lda tmp1
@ -43,7 +47,7 @@ _DrawSpriteSheet
jsr _DrawSprite
lda tmp3
ora #SPRITE_VFLIP
ora #DISP_HFLIP+DISP_VFLIP
tax
ldy tmp2
lda tmp1
@ -319,71 +323,3 @@ _CopyTile8x8V
]line equ ]line+1
--^
rts
; X = sprite vbuff address
; Y = tile data pointer
;_DrawTile8x8
; phb
; pea #^tiledata ; Set the bank to the tile data
; plb
;
;]line equ 0
; lup 8
; lda: tiledata+32+{]line*4},y
; andl spritemask+{]line*SPRITE_PLANE_SPAN},x
; stal spritemask+{]line*SPRITE_PLANE_SPAN},x
;
; ldal spritedata+{]line*SPRITE_PLANE_SPAN},x
; and: tiledata+32+{]line*4},y
; ora: tiledata+{]line*4},y
; stal spritedata+{]line*SPRITE_PLANE_SPAN},x
;
; lda: tiledata+32+{]line*4}+2,y
; andl spritemask+{]line*SPRITE_PLANE_SPAN}+2,x
; stal spritemask+{]line*SPRITE_PLANE_SPAN}+2,x
;
; ldal spritedata+{]line*SPRITE_PLANE_SPAN}+2,x
; and: tiledata+32+{]line*4}+2,y
; ora: tiledata+{]line*4}+2,y
; stal spritedata+{]line*SPRITE_PLANE_SPAN}+2,x
;]line equ ]line+1
; --^
;
; plb ; pop extra byte
; plb
; rts
; X = sprite vbuff address
; Y = tile data pointer
;
; Draws the tile vertically flipped
;_DrawTile8x8V
; phb
; pea #^tiledata ; Set the bank to the tile data
; plb
;]line equ 0
; lup 8
; lda: tiledata+32+{{7-]line}*4},y
; andl spritemask+{]line*SPRITE_PLANE_SPAN},x
; stal spritemask+{]line*SPRITE_PLANE_SPAN},x
;
; ldal spritedata+{]line*SPRITE_PLANE_SPAN},x
; and: tiledata+32+{{7-]line}*4},y
; ora: tiledata+{{7-]line}*4},y
; stal spritedata+{]line*SPRITE_PLANE_SPAN},x
; lda: tiledata+32+{{7-]line}*4}+2,y
; andl spritemask+{]line*SPRITE_PLANE_SPAN}+2,x
; stal spritemask+{]line*SPRITE_PLANE_SPAN}+2,x
;
; ldal spritedata+{]line*SPRITE_PLANE_SPAN}+2,x
; and: tiledata+32+{{7-]line}*4}+2,y
; ora: tiledata+{{7-]line}*4}+2,y
; stal spritedata+{]line*SPRITE_PLANE_SPAN}+2,x
;]line equ ]line+1
; --^
;
; plb ; pop extra byte
; plb
; rts