Apple-2gs-SW/iigs-game-engine
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iigs-game-engine/demos/sprites/App.Main.s

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Sample project to focus on sprite development
2021-10-13 20:13:52 +00:00
; Test driver to exercise graphics routines.
REL
DSK MAINSEG
use Locator.Macs.s
use Misc.Macs.s
use EDS.GSOS.MACS.s
use Tool222.Macs.s
use Util.Macs.s
use CORE.MACS.s
use ../../src/GTE.s
use ../../src/Defs.s
mx %00
; Feature flags
NO_INTERRUPTS equ 0 ; turn off for crossrunner debugging
NO_MUSIC equ 1 ; turn music + tool loading off
; Keycodes
LEFT_ARROW equ $08
RIGHT_ARROW equ $15
UP_ARROW equ $0B
DOWN_ARROW equ $0A
; Typical init
phk
plb
jsl EngineStartUp
Remove BG1 code to simplify the test harness
2021-10-13 22:45:25 +00:00
lda #^MyPalette ; Fill Palette #0 with our colors
Sample project to focus on sprite development
2021-10-13 20:13:52 +00:00
ldx #MyPalette
ldy #0
jsl SetPalette
Remove BG1 code to simplify the test harness
2021-10-13 22:45:25 +00:00
ldx #0 ; Mode 0 is full-screen
Sample project to focus on sprite development
2021-10-13 20:13:52 +00:00
jsl SetScreenMode
; Set up our level data
jsr BG0SetUp
Fix several incorrect uses of internal API; work toward functional demo
2021-10-22 05:56:12 +00:00
; jsr TileAnimInit
Sample project to focus on sprite development
2021-10-13 20:13:52 +00:00
; Allocate room to load data
Fix several incorrect uses of internal API; work toward functional demo
2021-10-22 05:56:12 +00:00
; jsr MovePlayerToOrigin ; Put the player at the beginning of the map
Sample project to focus on sprite development
2021-10-13 20:13:52 +00:00
Pull the sprite plane banks into the test build
2021-10-21 13:46:26 +00:00
; Add a player sprite
Make the test sprite movement a bit more interesting This results in trails being left on-screen and crashed after a period of time. The emulator shows writes going to the bank 01 I/O space ($01/$Cxxx) and there are occational garbage words written to the screen.
2021-10-29 05:52:54 +00:00
lda #80
sta PlayerX
sta PlayerXOld
lda #100
WIP: manual sprite rendering showing on screen
2021-10-29 02:41:01 +00:00
sta PlayerY
Make the test sprite movement a bit more interesting This results in trails being left on-screen and crashed after a period of time. The emulator shows writes going to the bank 01 I/O space ($01/$Cxxx) and there are occational garbage words written to the screen.
2021-10-29 05:52:54 +00:00
sta PlayerYOld
lda #1
sta PlayerXVel
sta PlayerYVel
Pull the sprite plane banks into the test build
2021-10-21 13:46:26 +00:00
Sample project to focus on sprite development
2021-10-13 20:13:52 +00:00
lda #DIRTY_BIT_BG0_REFRESH ; Redraw all of the tiles on the next Render
tsb DirtyBits
jsl Render
Fix several incorrect uses of internal API; work toward functional demo
2021-10-22 05:56:12 +00:00
WIP: manual sprite rendering showing on screen
2021-10-29 02:41:01 +00:00
; Set up a very specific test. First, we draw a sprite into the sprite plane, and then
; leave it alone. We are just testing the ability to merge sprite plane data into
; the play field tiles.
Sample project to focus on sprite development
2021-10-13 20:13:52 +00:00
EvtLoop
Make the test sprite movement a bit more interesting This results in trails being left on-screen and crashed after a period of time. The emulator shows writes going to the bank 01 I/O space ($01/$Cxxx) and there are occational garbage words written to the screen.
2021-10-29 05:52:54 +00:00
jsr UpdatePlayerPos
; Draw the sprite in the sprite plane
Reference sprite updates that do not leave trails
2021-10-29 05:17:23 +00:00
WIP: manual sprite rendering showing on screen
2021-10-29 02:41:01 +00:00
ldx PlayerX
ldy PlayerY
jsl GetSpriteVBuffAddr
tax ; put in X
ldy #3*128 ; draw the 3rd tile as a sprite
First pass at validating erasing the sprite on update
2021-10-29 03:19:18 +00:00
stx PlayerLastPos ; save for erasure
WIP: manual sprite rendering showing on screen
2021-10-29 02:41:01 +00:00
jsl DrawTileSprite
Reference sprite updates that do not leave trails
2021-10-29 05:17:23 +00:00
; Now the sprite has been drawn. Enqueue the dirty tiles. We blindly add the potential
; dirty tiles and rely on PushDirtyTile to elimate duplicates quickly
WIP: manual sprite rendering showing on screen
2021-10-29 02:41:01 +00:00
Make the test sprite movement a bit more interesting This results in trails being left on-screen and crashed after a period of time. The emulator shows writes going to the bank 01 I/O space ($01/$Cxxx) and there are occational garbage words written to the screen.
2021-10-29 05:52:54 +00:00
ldx PlayerX
ldy PlayerY
jsr MakeDirtySprite8x8
Reference sprite updates that do not leave trails
2021-10-29 05:17:23 +00:00
; Add the tiles that the sprite was previously at as well.
Make the test sprite movement a bit more interesting This results in trails being left on-screen and crashed after a period of time. The emulator shows writes going to the bank 01 I/O space ($01/$Cxxx) and there are occational garbage words written to the screen.
2021-10-29 05:52:54 +00:00
ldx PlayerXOld
ldy PlayerYOld
jsr MakeDirtyTile8x8
First pass at validating erasing the sprite on update
2021-10-29 03:19:18 +00:00
Make the test sprite movement a bit more interesting This results in trails being left on-screen and crashed after a period of time. The emulator shows writes going to the bank 01 I/O space ($01/$Cxxx) and there are occational garbage words written to the screen.
2021-10-29 05:52:54 +00:00
; The dirty tile queue has been written to; apply it to the code field
jsl ApplyTiles
WIP: manual sprite rendering showing on screen
2021-10-29 02:41:01 +00:00
; Let's see what it looks like!
Sample project to focus on sprite development
2021-10-13 20:13:52 +00:00
jsl Render
First pass at validating erasing the sprite on update
2021-10-29 03:19:18 +00:00
ldx PlayerLastPos ; Delete the sprite because it moved
jsl EraseTileSprite
Make the test sprite movement a bit more interesting This results in trails being left on-screen and crashed after a period of time. The emulator shows writes going to the bank 01 I/O space ($01/$Cxxx) and there are occational garbage words written to the screen.
2021-10-29 05:52:54 +00:00
WIP: manual sprite rendering showing on screen
2021-10-29 02:41:01 +00:00
; tax
; ldy PlayerY
; lda PlayerID
; jsl UpdateSprite
; jsl DoTimers
; jsl Render
Sample project to focus on sprite development
2021-10-13 20:13:52 +00:00
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
Exit
jsl EngineShutDown
_QuitGS qtRec
bcs Fatal
Fatal brk $00
MyPalette dw $0000,$0777,$0F31,$0E51,$00A0,$02E3,$0BF1,$0FA4,$0FD7,$0EE6,$0F59,$068F,$01CE,$09B9,$0EDA,$0EEE
WIP: manual sprite rendering showing on screen
2021-10-29 02:41:01 +00:00
PlayerID ds 2
PlayerX ds 2
First pass at validating erasing the sprite on update
2021-10-29 03:19:18 +00:00
PlayerXOld ds 2
WIP: manual sprite rendering showing on screen
2021-10-29 02:41:01 +00:00
PlayerY ds 2
Make the test sprite movement a bit more interesting This results in trails being left on-screen and crashed after a period of time. The emulator shows writes going to the bank 01 I/O space ($01/$Cxxx) and there are occational garbage words written to the screen.
2021-10-29 05:52:54 +00:00
PlayerYOld ds 2
First pass at validating erasing the sprite on update
2021-10-29 03:19:18 +00:00
PlayerLastPos ds 2
Make the test sprite movement a bit more interesting This results in trails being left on-screen and crashed after a period of time. The emulator shows writes going to the bank 01 I/O space ($01/$Cxxx) and there are occational garbage words written to the screen.
2021-10-29 05:52:54 +00:00
PlayerXVel ds 2
PlayerYVel ds 2
UpdatePlayerPos
lda PlayerX ; Move the player sprite a bit
sta PlayerXOld
clc
adc PlayerXVel
sta PlayerX
cmp #160-4
bcc :x_ok_1
lda #$FFFF
sta PlayerXVel
:x_ok_1 cmp #0
bne :x_ok_2
lda #$0001
sta PlayerXVel
:x_ok_2
lda PlayerY
sta PlayerYOld
clc
adc PlayerYVel
sta PlayerY
cmp #200-8
bcc :y_ok_1
lda #$FFFF
sta PlayerYVel
:y_ok_1 cmp #0
bne :y_ok_2
lda #$0001
sta PlayerYVel
:y_ok_2
rts
; X = coordinate
; Y = coordinate
MakeDirtySprite8x8
phx
phy
txa
lsr
lsr
tax
tya
lsr
lsr
lsr
tay
jsr MakeDirtySpriteTile ; top-left
lda 3,s
clc
adc #3
lsr
lsr
tax
jsr MakeDirtySpriteTile ; top-right
lda 1,s
clc
adc #7
lsr
lsr
tay
jsr MakeDirtySpriteTile ; bottom-right
lda 3,s
lsr
lsr
tax
jsr MakeDirtySpriteTile ; bottom-left
ply
plx
rts
; X = coordinate
; Y = coordinate
MakeDirtyTile8x8
phx
phy
txa
lsr
lsr
tax
tya
lsr
lsr
lsr
tay
jsr MakeDirtyTile ; top-left
lda 3,s
clc
adc #3
lsr
lsr
tax
jsr MakeDirtyTile ; top-right
lda 1,s
clc
adc #7
lsr
lsr
tay
jsr MakeDirtyTile ; bottom-right
lda 3,s
lsr
lsr
tax
jsr MakeDirtyTile ; bottom-left
ply
plx
rts
WIP: manual sprite rendering showing on screen
2021-10-29 02:41:01 +00:00
; x = column
; y = row
MakeDirtyTile
phx
phy
Make the test sprite movement a bit more interesting This results in trails being left on-screen and crashed after a period of time. The emulator shows writes going to the bank 01 I/O space ($01/$Cxxx) and there are occational garbage words written to the screen.
2021-10-29 05:52:54 +00:00
jsl GetTileStoreOffset
jsl PushDirtyTile
ply
plx
rts
MakeDirtySpriteTile
phx
phy
WIP: manual sprite rendering showing on screen
2021-10-29 02:41:01 +00:00
txa
asl
asl
tax
tya
asl
asl
asl
tay
jsl GetSpriteVBuffAddr
pha
First pass at validating erasing the sprite on update
2021-10-29 03:19:18 +00:00
lda 3,s
tay
lda 5,s
tax
WIP: manual sprite rendering showing on screen
2021-10-29 02:41:01 +00:00
jsl GetTileStoreOffset
tax
lda #TILE_SPRITE_BIT
stal TileStore+TS_SPRITE_FLAG,x
pla
stal TileStore+TS_SPRITE_ADDR,x
Make the test sprite movement a bit more interesting This results in trails being left on-screen and crashed after a period of time. The emulator shows writes going to the bank 01 I/O space ($01/$Cxxx) and there are occational garbage words written to the screen.
2021-10-29 05:52:54 +00:00
txa
jsl PushDirtyTile
First pass at validating erasing the sprite on update
2021-10-29 03:19:18 +00:00
ply
plx
WIP: manual sprite rendering showing on screen
2021-10-29 02:41:01 +00:00
rts
Sample project to focus on sprite development
2021-10-13 20:13:52 +00:00
; Position the screen with the botom-left corner of the tilemap visible
MovePlayerToOrigin
lda #0 ; Set the player's position
jsl SetBG0XPos
lda TileMapHeight
asl
asl
asl
sec
sbc ScreenHeight
jsl SetBG0YPos
rts
qtRec adrl $0000
da $00
PUT gen/App.TileMapBG0.s
PUT gen/App.TileSetAnim.s
Overlay ENT
rtl
ANGLEBNK ENT
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