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https://github.com/lscharen/iigs-game-engine.git
synced 2025-03-11 23:34:25 +00:00
Expose the ability to select which rendering order to use for sprites
This commit is contained in:
Lucas Scharenbroich
parent
c533d846d7
commit
39163ea786
@ -26,17 +26,36 @@ DTile equ 14
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Tmp2 equ 16
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ScreenWidth equ 18
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ScreenHeight equ 20
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SpriteFlags equ 22
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frameCount equ 24
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OldOneSecondCounter equ 26
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SpriteAddr equ 28
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RenderMode equ 30
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; Control modes
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DefaultMode equ RENDER_WITH_SHADOWING
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SlowSprites equ 0
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; Typical init
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phk
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plb
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sta MyUserId ; GS/OS passes the memory manager user ID for the application into the program
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tdc
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sta MyDirectPage ; Keep a copy for the overlay callback
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_MTStartUp ; GTE requires the miscellaneous toolset to be running
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lda #ENGINE_MODE_USER_TOOL+ENGINE_MODE_TWO_LAYER
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lda #ENGINE_MODE_USER_TOOL ; +ENGINE_MODE_TWO_LAYER
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jsr GTEStartUp ; Load and install the GTE User Tool
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; Init local variables
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stz frameCount
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lda #DefaultMode
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sta RenderMode
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; Initialize the graphics screen to a 256x160 playfield
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pea #160
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@ -46,7 +65,7 @@ ScreenHeight equ 20
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; Load a tileset
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pea 0
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pea 120
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pea 360
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pea #^TSZelda
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pea #TSZelda
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_GTELoadTileSet
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@ -59,6 +78,14 @@ ScreenHeight equ 20
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jsr SetLimits
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lda #193 ; Tile ID of '0'
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jsr InitOverlay ; Initialize the status bar
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pha
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_GTEGetSeconds
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pla
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sta OldOneSecondCounter
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jsr UdtOverlay
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; Create stamps for the sprites we are going to use
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HERO_SPRITE equ SPRITE_16X16+1
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@ -66,6 +93,23 @@ HERO_SPRITE equ SPRITE_16X16+1
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pea VBUFF_SPRITE_START ; vbuff address
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_GTECreateSpriteStamp
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DO SlowSprites
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lda #SPRITE_16X16
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sta SpriteFlags
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lda #VBUFF_SPRITE_START
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sta SpriteAddr
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ELSE
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lda #SPRITE_16X16+SPRITE_COMPILED
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sta SpriteFlags
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pha ; Space for result
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pea SPRITE_16X16
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pea VBUFF_SPRITE_START
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_GTECompileSpriteStamp
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pla
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sta SpriteAddr
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FIN
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; Create sprites
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stz Tmp0
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stz Tmp1 ; Slot number
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@ -73,8 +117,8 @@ HERO_SPRITE equ SPRITE_16X16+1
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ldx Tmp0
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:sloop
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pei Tmp1 ; Put the sprite in this slot
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pea SPRITE_16X16 ; with these flags (h/v flip)
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pea VBUFF_SPRITE_START
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pei SpriteFlags ; with these flags (h/v flip)
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pei SpriteAddr
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lda PlayerX,x
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pha
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lda PlayerY,x
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@ -93,10 +137,6 @@ HERO_SPRITE equ SPRITE_16X16+1
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jsr _fillTileStore
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; Initialize the frame counter
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stz FrameCount
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; Set the screen coordinates
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lda #0
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@ -118,49 +158,60 @@ HERO_SPRITE equ SPRITE_16X16+1
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brl :do_render
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:do_more
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and #$007F
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cmp #'a'
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cmp #'a' ; Put in single-step advance mode
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bne :skip_a
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:a_loop
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jsr :next_frame
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:a_spin
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pha ; space for result, with pattern
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_GTEReadControl
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pla
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bit #PAD_KEY_DOWN
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bne :a_spin
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and #$007F
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cmp #'r' ; resume?
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beq :do_render
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cmp #'s'
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beq :toggle_sort
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cmp #'a'
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beq :a_loop
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bra :a_spin
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:toggle_sort lda RenderMode
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eor #RENDER_SPRITES_SORTED
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sta RenderMode
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pei RenderMode
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_GTERender
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bra :a_spin
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:skip_a
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:do_render jsr :next_frame
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brl :evt_loop
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:next_frame
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jsr _moveSprites
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inc ScreenX
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inc ScreenY
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pei ScreenX
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pei ScreenY
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_GTESetBG0Origin
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brl :do_render
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:skip_a
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cmp #'z'
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bne :skip_z
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inc PlayerX
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pea 0
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lda PlayerX
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pha
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lda PlayerY
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pha
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_GTEMoveSprite
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:skip_z
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:do_render
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jsr _moveSprites
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pea #RENDER_WITH_SHADOWING
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pei RenderMode
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_GTERender
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; Update the performance counters
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inc FrameCount
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inc frameCount
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pha
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_GTEGetSeconds
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pla
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cmp LastSecond
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beq :no_fps
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sta LastSecond
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; lda FrameCount
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; ldx #0
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; ldy #$FFFF
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; jsr DrawWord
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stz FrameCount
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:no_fps
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brl :evt_loop
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cmp OldOneSecondCounter
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beq :noudt
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sta OldOneSecondCounter
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jsr UdtOverlay
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stz frameCount
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:noudt
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rts
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; Shut down everything
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Exit
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@ -170,11 +221,17 @@ qtRec adrl $0000
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da $00
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; Array of sprite positions and velocities
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DO 1
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PlayerX dw 8,14,29,34,45,67,81,83,92,101,39,22,7,74,111,9
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PlayerY dw 72,24,13,56,35,72,23,8,93,123,134,87,143,14,46,65
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PlayerU dw 1,2,3,4,1,2,3,4,1,2,3,4,1,2,3,4
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PlayerV dw 1,1,1,1,2,2,2,4,3,3,3,3,4,4,4,4
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ELSE
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PlayerX dw 2,12,22,32,42,52,62,72,2,12,22,32,42,52,62,72,
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PlayerY dw 24,24,24,24,24,24,24,24,44,44,44,44,44,44,44,44
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PlayerU dw 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
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PlayerV dw 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
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FIN
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_moveSprites
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stz Tmp0
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:loop
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@ -280,15 +337,15 @@ _fillTileStore
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jsr _drawTree
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lda Tmp1
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inc
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inc
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clc
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adc #2
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sta Tmp1
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cmp #40
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bcc :iloop
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lda Tmp0
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inc
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inc
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clc
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adc #2
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sta Tmp0
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cmp #25
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bcc :oloop
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@ -427,11 +484,12 @@ _drawTreeHV
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_GTESetTile
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rts
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MyDirectPage ds 2
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MyUserId ds 2
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FrameCount ds 2
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LastSecond dw 0
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palette dw $0000,$08C1,$0C41,$0F93,$0777,$0FDA,$00A0,$0000,$0D20,$0FFF,$023E,$0,$0,$0,$0,$0
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palette dw $0000,$08C1,$0C41,$0F93,$0777,$0FDA,$00A0,$0000,$0D20,$0FFF,$0FD7,$0F59,$0000,$01CE,$0EDA,$0EEE
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PUT ../kfest-2022/StartUp.s
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PUT App.Msg.s
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PUT font.s
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PUT ../shell/Overlay.s
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; PUT App.Msg.s
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; PUT font.s
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File diff suppressed because it is too large
Load Diff
@ -161,6 +161,7 @@ RENDER_BG1_VERT_OFFSET equ $0004
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RENDER_BG1_ROTATION equ $0008
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RENDER_PER_SCANLINE equ $0010
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RENDER_WITH_SHADOWING equ $0020
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RENDER_SPRITES_SORTED equ $0040
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; Overlay flags
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OVERLAY_MASKED equ $0000 ; Overlay has a mask, so the background must be draw first
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@ -175,6 +175,7 @@ RENDER_BG1_VERT_OFFSET equ $0004
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RENDER_BG1_ROTATION equ $0008
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RENDER_PER_SCANLINE equ $0010
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RENDER_WITH_SHADOWING equ $0020
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RENDER_SPRITES_SORTED equ $0040 ; Draw the sprites in y-sorted order. Otherwise, use the index.
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; Overlay flags
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OVERLAY_MASKED equ $0000 ; Overlay has a mask, so the background must be draw first
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63
src/Render.s
63
src/Render.s
@ -156,7 +156,6 @@ _DoOverlay
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; Use the per-scanline tables to set the screen. This is really meant to be used without the built-in tilemap
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; support and is more of a low-level way to control the background rendering
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_RenderScanlines
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jsr _ApplyBG0YPos ; Set stack addresses for the virtual lines to the physical screen
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jsr _ApplyBG1YPos ; Set the y-register values of the blitter
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@ -343,9 +342,6 @@ _RenderWithShadowing
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; to create priority lists of scanline ranges.
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jsr _BuildShadowList ; Create the rages based on the sorted sprite y-values
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; jsr _MergeOverlay ; Add the overlay range into the shadow list (treat it as a sprite)
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; jsr _ComplementList ; Create the complement to identify non-sprite / non-overlay scanlines
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jsr _ShadowOff ; Turn off shadowing and draw all the scanlines with sprites on them
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jsr _DrawShadowList
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@ -604,30 +600,55 @@ _DrawShadowList
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; Run through the list of sprites that are not IS_OFFSCREEN and not OVERLAYS and draw them directly to the graphics screen. We can use
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; compiled sprites here, with limitations.
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_DrawDirectSprites
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lda RenderFlags
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bit #RENDER_SPRITES_SORTED
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bne :sorted
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; Shift through the sprites
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lda SpriteMap
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beq :empty
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sta tmp15
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ldx #0
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:iloop
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lsr tmp15
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bcc :next
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jsr :render
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:next inx
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inx
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lda tmp15
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bne :iloop
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rts
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:sorted
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ldx _SortedHead
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bmi :empty
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:loop
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lda _Sprites+SPRITE_ID,x
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bit #SPRITE_OVERLAY
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bne :next
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lda _Sprites+SPRITE_STATUS,x
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bit #SPRITE_STATUS_HIDDEN
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bne :next
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phx
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jsr _DrawStampToScreen
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plx
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bra :next
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:next
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jsr :render
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lda _Sprites+SORTED_NEXT,x ; If there another sprite in the list?
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tax
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bpl :loop
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:empty
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rts
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:render
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lda _Sprites+SPRITE_ID,x
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bit #SPRITE_OVERLAY
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beq *+3
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rts
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lda _Sprites+SPRITE_STATUS,x
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bit #SPRITE_STATUS_HIDDEN
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beq *+3
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rts
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phx
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jsr _DrawStampToScreen
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plx
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rts
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; Run through the sorted list and perform a final render the jumps between calling _PEISlam for shadowed lines,
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; _BltRange for clean backgrounds and Overlays as needed.
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;
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@ -653,7 +674,7 @@ _DrawFinalPass
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bmi :empty
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lda _Sprites+SPRITE_CLIP_TOP,x ; Load the first object's top edge
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sta :curr_top
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; sta :curr_top
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beq :loop ; If it's at the top edge of the screen, proceed. Othrewise _BltRange the top range
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ldx #0
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@ -669,7 +690,7 @@ _DrawFinalPass
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lda _Sprites+SPRITE_CLIP_TOP,x
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sta :curr_top
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lda _Sprites+SPRITE_CLIP_BOTTOM,x ; Optimistically set the end of the segment to the bottom of this object
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inc ; Clip values are on the scanline, so add one to make it a proper interval
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inc ; Clip values are on the scanline, so add one to make it a proper interval
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:update
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sta :curr_bottom
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@ -762,6 +783,8 @@ _DrawFinalPass
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lda ScreenAddr,x
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clc
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adc ScreenX0
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ldx :curr_top
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ldy :curr_bottom
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:disp jsl $000000
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rts
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