Apple-2gs-SW/iigs-game-engine
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Add single-step and free-run controls to test harness

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This commit is contained in:
Lucas Scharenbroich 2021-10-29 11:12:58 -05:00
parent b1c11b09fc
commit 33280dc5c5
1 changed files with 82 additions and 16 deletions
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98
demos/sprites/App.Main.s
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@ -64,6 +64,27 @@ DOWN_ARROW equ $0A
; leave it alone. We are just testing the ability to merge sprite plane data into
; the play field tiles.
EvtLoop
jsl ReadControl
and #$007F ; Ignore the buttons for now
cmp #'q'
bne :1
brl Exit
:1
cmp #'r'
beq :3
cmp #'n'
beq :2
stz KeyState
bra EvtLoop
:2
lda KeyState ; Wait for key up / key down
bne EvtLoop
lda #1
sta KeyState
:3
jsr UpdatePlayerPos
; Draw the sprite in the sprite plane
@ -100,6 +121,10 @@ EvtLoop
ldx PlayerLastPos ; Delete the sprite because it moved
jsl EraseTileSprite
ldx PlayerXOld ; Remove the sprite flag from the tiles
ldy PlayerYOld ; at the old position.
jsr ClearSpriteFlag8x8
; tax
; ldy PlayerY
; lda PlayerID
@ -108,22 +133,6 @@ EvtLoop
; jsl DoTimers
; jsl Render
jsl ReadControl
and #$007F ; Ignore the buttons for now
cmp #'q'
bne :7
brl Exit
:7 cmp #LEFT_ARROW
bne :8
brl EvtLoop
:8 cmp #RIGHT_ARROW
bne :9
brl EvtLoop
:9
brl EvtLoop
; Exit code
@ -145,6 +154,7 @@ PlayerYOld ds 2
PlayerLastPos ds 2
PlayerXVel ds 2
PlayerYVel ds 2
KeyState ds 2
UpdatePlayerPos
lda PlayerX ; Move the player sprite a bit
@ -209,6 +219,7 @@ MakeDirtySprite8x8
adc #7
lsr
lsr
lsr
tay
jsr MakeDirtySpriteTile ; bottom-right
@ -252,6 +263,7 @@ MakeDirtyTile8x8
adc #7
lsr
lsr
lsr
tay
jsr MakeDirtyTile ; bottom-right
@ -265,8 +277,62 @@ MakeDirtyTile8x8
plx
rts
ClearSpriteFlag8x8
phx
phy
txa
lsr
lsr
tax
tya
lsr
lsr
lsr
tay
jsr ClearSpriteFlag ; top-left
lda 3,s
clc
adc #3
lsr
lsr
tax
jsr ClearSpriteFlag ; top-right
lda 1,s
clc
adc #7
lsr
lsr
lsr
tay
jsr ClearSpriteFlag ; bottom-right
lda 3,s
lsr
lsr
tax
jsr ClearSpriteFlag ; bottom-left
ply
plx
rts
; x = column
; y = row
ClearSpriteFlag
phx
phy
jsl GetTileStoreOffset
tax
lda #0
stal TileStore+TS_SPRITE_FLAG,x
ply
plx
rts
MakeDirtyTile
phx
phy