Apple-2gs-SW/iigs-game-engine
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Improve per-scanline demo

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This commit is contained in:
Lucas Scharenbroich 2023-03-09 16:17:55 -06:00
parent e3409f92fa
commit 5cfefc350c
1 changed files with 117 additions and 42 deletions
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159
demos/kfest-2022/demo-1/App.Main.s
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@ -38,6 +38,9 @@ MaxBG0Y equ 22
frameCount equ 24
OldOneSecondCounter equ 26
appTmp0 equ 28
seg1x equ 30
seg2x equ 32
seg3x equ 34
phk
plb
@ -51,12 +54,6 @@ appTmp0 equ 28
lda #ENGINE_MODE_USER_TOOL ; Engine in Fast Mode as a User Tool
jsr GTEStartUp ; Load and install the GTE User Tool
; Initialize local variables
stz StartX
stz StartY
stz frameCount
; Load a tileset
pea 0
@ -72,11 +69,25 @@ appTmp0 equ 28
; Set up our level data
jsr BG0SetUp
; jsr BG0SetUp
pea 416
pea 30
pea ^App_TileMapBG0
pea App_TileMapBG0+{10*416}
_GTESetBG0TileMapInfo
jsr SetLimits
pea #80
pei MaxBG0Y
; Initialize local variables
lda #56
sta StartX
lda #0
sta StartY
stz frameCount
pei StartX
pei StartY
_GTESetBG0Origin
lda #193 ; Tile ID of '0'
@ -89,8 +100,9 @@ appTmp0 equ 28
; Set up the per-scanline rendering
lda #0
lda StartX
jsr InitOffsets
pea #scanlineHorzOffset
pea #^BG0Offsets
pea #BG0Offsets
@ -114,13 +126,14 @@ EvtLoop
:do_more
cmp #'d'
bne :not_d
lda StartX
cmp MaxBG0X
bcc *+5
brl :do_render
inc StartX
lda StartX
; lda StartX
; cmp MaxBG0X
; bcc *+5
; brl :do_render
jsr DecRanges
jsr SetOffsets
; pei StartX
; pei StartY
; _GTESetBG0Origin
@ -129,12 +142,13 @@ EvtLoop
cmp #'a'
bne :not_a
lda StartX
bne *+5
brl :do_render
dec StartX
lda StartX
; lda StartX
; bne *+5
; brl :do_render
jsr IncRanges
jsr SetOffsets
; pei StartX
; pei StartY
; _GTESetBG0Origin
@ -255,38 +269,99 @@ SetLimits
rts
SetOffsets
and #$00FF
brl _SetOffsets
DecRanges
lda seg1x
bne *+5
lda #164
dec
sta seg1x
bit #1
bne :out
lda seg2x
bne *+5
lda #164
dec
sta seg2x
bit #1
bne :out
lda seg3x
bne *+5
lda #164
dec
sta seg3x
:out
rts
IncRanges
lda seg1x
inc
cmp #164
bcc *+5
lda #0
sta seg1x
bit #1
bne :out
lda seg2x
inc
cmp #164
bcc *+5
lda #0
sta seg2x
bit #1
bne :out
lda seg3x
inc
cmp #164
bcc *+5
lda #0
sta seg3x
:out
rts
InitOffsets
and #$00FF
sta appTmp0
pha
ldx #0
ldy #40
jsr _InitRange
ldx #40
ldy #80
jsr _InitRange
ldx #80
ldy #80
jsr _InitRange
ldx #160
ldy #48
ldx #120
ldy #88
jsr _InitRange
lda appTmp0
_SetOffsets
ldx #160
ldy #48
jsr _SetRange
pla
sta seg1x
jsr SetOffset1
lsr
ldx #80
sta seg2x
jsr SetOffset2
lsr
sta seg3x
jmp SetOffset3
SetOffsets
lda seg1x
jsr SetOffset1
lda seg2x
jsr SetOffset2
lda seg3x
jmp SetOffset3
SetOffset1
ldx #120
ldy #88
jmp _SetRange
SetOffset2
ldx #40
ldy #80
jsr _SetRange
lsr
jmp _SetRange
SetOffset3
ldx #0
ldy #80
jsr _SetRange
rts
ldy #40
jmp _SetRange
_SetRange
pha