Apple-2gs-SW/iigs-game-engine
1
0
Fork 0
mirror of https://github.com/lscharen/iigs-game-engine.git synced 2025-01-30 06:31:55 +00:00
Code Issues Projects Releases Wiki Activity

Add back support for SPRITE_HIDE control bit

Browse Source
This commit is contained in:
Lucas Scharenbroich 2022-07-08 12:35:49 -05:00
parent e9a2b8569b
commit 552d32d0fa
1 changed files with 22 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

25
src/Sprite.s
View File

@ -223,9 +223,11 @@ _DoPhase1
trb SpriteMap
lda #SPRITE_STATUS_EMPTY ; Mark as empty so no error if we try to Add a sprite here again
sta _Sprites+SPRITE_STATUS,y
:hidden
jmp _ClearSpriteFromTileStore ; Clear the tile flags, add to the dirty tile list and done
:hidden
jmp _ClearSpriteFromTileStore
:no_clear
; If the sprite is hidden, then treat it like it's offscreen and clear it from the tile store. Because
@ -263,8 +265,9 @@ _DoPhase1
:updated
jsr _CalcDirtySprite ; This function preserves Y
lda #SPRITE_STATUS_OCCUPIED ; Clear the dirty bits (ADDED, UPDATED, MOVED)
sta _Sprites+SPRITE_STATUS,y
lda #$FFFF!{SPRITE_STATUS_ADDED.SPRITE_STATUS_UPDATED.SPRITE_STATUS_MOVED}
and _Sprites+SPRITE_STATUS,y
sta _Sprites+SPRITE_STATUS,y ; Clear the dirty bits (ADDED, UPDATED, MOVED)
jmp _MarkDirtySpriteTiles
@ -380,7 +383,7 @@ _AddSprite
sta _Sprites+SPRITE_ID,x ; Keep a copy of the full descriptor
lda #SPRITE_STATUS_OCCUPIED+SPRITE_STATUS_ADDED
lda #SPRITE_STATUS_ADDED
sta _Sprites+SPRITE_STATUS,x
stz _Sprites+VBUFF_ADDR,x ; Clear the VBUFF address, just to initialize it
@ -779,7 +782,7 @@ _UpdateSprite
; Do some work to see if only the H or V bits have changed. If so, merge them into the
; SPRITE_ID
eor _Sprites+SPRITE_ID,x ; If either bit has changed, this will be non-zero
and #SPRITE_VFLIP+SPRITE_HFLIP
and #SPRITE_VFLIP+SPRITE_HFLIP+SPRITE_HIDE
bne :sprite_flag_change
tya
@ -790,6 +793,18 @@ _UpdateSprite
:sprite_flag_change
eor _Sprites+SPRITE_ID,x ; put the new bits into the value. ---HV--- ^ SPRITE_ID & 00011000 ^ SPRITE_ID = SSSHVSSS
sta _Sprites+SPRITE_ID,x ; Keep a copy of the full descriptor
bit #SPRITE_HIDE ; Sync the SPRITE_HIDE bit into the SPRITE_STATUS_HIDDEN flag
beq :not_hidden
lda #SPRITE_STATUS_HIDDEN
ora _Sprites+SPRITE_STATUS,x
sta _Sprites+SPRITE_STATUS,x
bra :sync_complete
:not_hidden lda #$FFFF!SPRITE_STATUS_HIDDEN
and _Sprites+SPRITE_STATUS,x
sta _Sprites+SPRITE_STATUS,x
:sync_complete
tya
:sprite_stamp_change
sta _Sprites+VBUFF_ADDR,x ; Just save this to stay in sync