Added background saving to gameobject rendering
This commit is contained in:
blondie7575
parent
3e99f10ec7
commit
3c58aa6232
179
gameobject.s
179
gameobject.s
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@ -12,47 +12,123 @@ GAMEOBJECTHEIGHT = 8
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gameobjectData:
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.word 40 ; X pos in pixels (from left terrain edge)
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.word 38 ; Y pos in pixels (from bottom terrain edge)
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.word 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 ; Saved background
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GO_POSX = 0 ; Byte offsets into gameobject data structure
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GO_POSY = 2
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GO_BACKGROUND = 4
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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; renderGameobject
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; RENDER_GAMEOBJECT
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;
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; PARAML0 = Pointer to gameobject data
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; ptr = Pointer to gameobject data
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; Trashes SCRATCHL
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;
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renderGameobject:
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.macro RENDER_GAMEOBJECT ptr
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.scope
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SAVE_AXY
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; Find gameobject location in video memory
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ldy #0
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; X
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lda (PARAML0),y
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lda ptr+GO_POSX,y
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lsr
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sec
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sbc leftScreenEdge
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bmi renderGameobjectDone ; Gameobject is off left edge of screen
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bmi renderGameobjectSkip ; Gameobject is off left edge of screen
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cmp #320 - GAMEOBJECTWIDTH
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bpl renderGameobjectDone ; Gameobject is off right edge of screen
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bpl renderGameobjectSkip ; Gameobject is off right edge of screen
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sta SCRATCHL
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; Y
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iny
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iny
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sec
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lda #200
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sbc (PARAML0),y
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bmi renderGameobjectDone ; Gameobject is off top edge of screen
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sbc ptr+GO_POSY,y
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bmi renderGameobjectSkip ; Gameobject is off top edge of screen
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cmp #200 - GAMEOBJECTHEIGHT
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bpl renderGameobjectDone ; Gameobject is off bottom edge of screen
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bpl renderGameobjectSkip ; Gameobject is off bottom edge of screen
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asl
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tax
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lda vramYOffset,x
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clc
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adc SCRATCHL
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tax
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tax ; X now contains the VRAM offset of the upper left corner
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phx
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bra renderGameobjectBackground
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; X now contains the VRAM offset of the upper left corner
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renderGameobjectSkip:
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jmp renderGameobjectDone
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renderGameobjectBackground:
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; Save background
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lda VRAM,x
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sta ptr+GO_BACKGROUND,y
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iny
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iny
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lda VRAM+2,x
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sta ptr+GO_BACKGROUND,y
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iny
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iny
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lda VRAM+160,x
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sta ptr+GO_BACKGROUND,y
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iny
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iny
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lda VRAM+160+2,x
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sta ptr+GO_BACKGROUND,y
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iny
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iny
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lda VRAM+160*2,x
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sta ptr+GO_BACKGROUND,y
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iny
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iny
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lda VRAM+160*2+2,x
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sta ptr+GO_BACKGROUND,y
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iny
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iny
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lda VRAM+160*3,x
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sta ptr+GO_BACKGROUND,y
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iny
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iny
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lda VRAM+160*3+2,x
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sta ptr+GO_BACKGROUND,y
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iny
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iny
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lda VRAM+160*4,x
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sta ptr+GO_BACKGROUND,y
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iny
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iny
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lda VRAM+160*4+2,x
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sta ptr+GO_BACKGROUND,y
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iny
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iny
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lda VRAM+160*5,x
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sta ptr+GO_BACKGROUND,y
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iny
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iny
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lda VRAM+160*5+2,x
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sta ptr+GO_BACKGROUND,y
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iny
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iny
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lda VRAM+160*6,x
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sta ptr+GO_BACKGROUND,y
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iny
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iny
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lda VRAM+160*6+2,x
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sta ptr+GO_BACKGROUND,y
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iny
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iny
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lda VRAM+160*7,x
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sta ptr+GO_BACKGROUND,y
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iny
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iny
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lda VRAM+160*7+2,x
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sta ptr+GO_BACKGROUND,y
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plx
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; Draw sprite
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lda #$FFFF
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sta VRAM,x
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sta VRAM+2,x
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@ -73,66 +149,105 @@ renderGameobject:
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renderGameobjectDone:
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RESTORE_AXY
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rts
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.endscope
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.endmacro
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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; unrenderGameobject
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; UNRENDER_GAMEOBJECT
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;
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; PARAML0 = Pointer to gameobject data
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; ptr = Pointer to gameobject data
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; Trashes SCRATCHL
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;
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unrenderGameobject:
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.macro UNRENDER_GAMEOBJECT ptr
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.scope
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SAVE_AXY
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; Find gameobject location in video memory
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ldy #0
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; X
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lda (PARAML0),y
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lda ptr+GO_POSX,y
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lsr
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sec
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sbc leftScreenEdge
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bmi unrenderGameobjectDone ; Gameobject is off left edge of screen
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cmp #320 - GAMEOBJECTWIDTH
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bpl unrenderGameobjectDone ; Gameobject is off right edge of screen
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sta SCRATCHL
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; Y
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iny
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iny
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sec
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lda #200
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sbc (PARAML0),y
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bmi unrenderGameobjectDone ; Gameobject is off top edge of screen
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cmp #200 - GAMEOBJECTHEIGHT
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bpl unrenderGameobjectDone ; Gameobject is off bottom edge of screen
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sbc ptr+GO_POSY,y
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asl
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tax
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lda vramYOffset,x
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clc
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adc SCRATCHL
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tax
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tax ; X now contains the VRAM offset of the upper left corner
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; X now contains the VRAM offset of the upper left corner
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lda #$0000
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lda ptr+GO_BACKGROUND,y
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sta VRAM,x
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iny
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iny
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lda ptr+GO_BACKGROUND,y
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sta VRAM+2,x
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iny
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iny
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lda ptr+GO_BACKGROUND,y
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sta VRAM+160,x
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iny
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iny
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lda ptr+GO_BACKGROUND,y
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sta VRAM+160+2,x
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iny
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iny
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lda ptr+GO_BACKGROUND,y
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sta VRAM+160*2,x
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iny
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iny
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lda ptr+GO_BACKGROUND,y
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sta VRAM+160*2+2,x
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iny
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iny
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lda ptr+GO_BACKGROUND,y
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sta VRAM+160*3,x
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iny
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iny
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lda ptr+GO_BACKGROUND,y
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sta VRAM+160*3+2,x
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iny
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iny
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lda ptr+GO_BACKGROUND,y
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sta VRAM+160*4,x
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iny
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iny
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lda ptr+GO_BACKGROUND,y
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sta VRAM+160*4+2,x
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iny
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iny
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lda ptr+GO_BACKGROUND,y
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sta VRAM+160*5,x
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iny
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iny
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lda ptr+GO_BACKGROUND,y
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sta VRAM+160*5+2,x
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iny
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iny
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lda ptr+GO_BACKGROUND,y
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sta VRAM+160*6,x
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iny
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iny
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lda ptr+GO_BACKGROUND,y
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sta VRAM+160*6+2,x
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iny
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iny
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lda ptr+GO_BACKGROUND,y
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sta VRAM+160*7,x
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iny
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iny
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lda ptr+GO_BACKGROUND,y
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sta VRAM+160*7+2,x
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unrenderGameobjectDone:
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RESTORE_AXY
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rts
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.endscope
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.endmacro
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BIN
gscats.2mg
BIN
gscats.2mg
Binary file not shown.
15
player.s
15
player.s
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@ -10,14 +10,13 @@ playerData:
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; gameobject data
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.word 40 ; X pos in pixels (from left terrain edge)
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.word 38 ; Y pos in pixels (from bottom terrain edge)
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.word 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 ; Saved background
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.word 45 ; Angle in degrees from +X
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.word 50 ; Power
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PD_POSX = 0 ; Byte offsets into player data structure
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PD_POSY = 2
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PD_ANGLE = 4
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PD_POWER = 6
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PD_ANGLE = 36
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PD_POWER = 38
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.macro PLAYERPTR_Y
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tya ; Pointer to player structure from index
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@ -68,9 +67,9 @@ playerFire:
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SAVE_AY
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PLAYERPTR_Y
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lda playerData+PD_POSX,y
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lda playerData+GO_POSX,y
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sta projectileParams
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lda playerData+PD_POSY,y
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lda playerData+GO_POSY,y
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clc
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adc #GAMEOBJECTHEIGHT
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sta projectileParams+2
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@ -89,9 +88,7 @@ playerFire:
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;
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;
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renderPlayers:
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lda #playerData
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sta PARAML0
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jsr renderGameobject
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RENDER_GAMEOBJECT playerData
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rts
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69
projectile.s
69
projectile.s
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@ -7,29 +7,26 @@
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projectileData:
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; gameobject data
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; gameobject data (we're a subclass, effectively)
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.word -1 ; Pos X in pixels (from left terrain edge)
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.word 0 ; Pos Y in pixels (from bottom terrain edge)
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.word 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 ; Saved background
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.word 0 ; Pos X (12.4 fixed point)
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.word 0 ; Pos Y (12.4 fixed point)
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.word 0 ; Velocity X (8.8 fixed point)
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.word 0 ; Velocity Y (8.8 fixed point)
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.word 0,0 ; Padding
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JD_POSX = 0 ; Byte offsets into projectile data structure
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JD_POSY = 2
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JD_PRECISEX = 4
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JD_PRECISEY = 6
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JD_VX = 8
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JD_VY = 10
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JD_PRECISEX = 36 ; Byte offsets into projectile data structure
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JD_PRECISEY = 38
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JD_VX = 40
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JD_VY = 42
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GRAVITY = $ffff ; 8.8 fixed point
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.macro PROJECTILEPTR_Y
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tya ; Pointer to projectil structure from index
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tya ; Pointer to projectile structure from index
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asl
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asl
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asl
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@ -55,50 +52,39 @@ fireProjectile:
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SAVE_AXY
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; Set up projectile structure
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ldy #0
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lda #projectileData ; Only one active at a time for now
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sta SCRATCHL
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ldy #0 ; Only one active at a time for now
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PROJECTILEPTR_Y
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lda projectileParams ; X pos
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sta (SCRATCHL),y
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iny
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iny
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sta projectileData+GO_POSX,y
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lda projectileParams+2 ; Y pos
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sta (SCRATCHL),y
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iny
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iny
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sta projectileData+GO_POSY,y
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lda projectileParams ; Fixed point version of X pos
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asl
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asl
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asl
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asl
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sta (SCRATCHL),y
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iny
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iny
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sta projectileData+JD_PRECISEX,y
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lda projectileParams+2 ; Fixed point version of Y pos
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asl
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asl
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asl
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asl
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sta (SCRATCHL),y
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iny
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iny
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sta projectileData+JD_PRECISEY,y
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lda projectileParams+4 ; Convert angle to vector
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asl
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tax
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lda angleToVectorX,x ; Velocity X
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sta (SCRATCHL),y
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iny
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iny
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sta projectileData+JD_VX,y
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lda projectileParams+4 ; Convert angle to vector
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asl
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tax
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lda angleToVectorY,x ; Velocity Y
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sta (SCRATCHL),y
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sta projectileData+JD_VY,y
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RESTORE_AXY
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rts
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@ -111,7 +97,7 @@ fireProjectile:
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;
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updateProjectiles:
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SAVE_AY
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lda projectileData+JD_POSX
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lda projectileData+GO_POSX
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bmi updateProjectilesDone
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; Integrate gravity over velocity
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@ -140,7 +126,7 @@ updateProjectiles:
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lsr
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lsr
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lsr
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sta projectileData+JD_POSX
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sta projectileData+GO_POSX
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bmi updateProjectilesDelete
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cmp #TERRAINWIDTH-GAMEOBJECTWIDTH-1
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bpl updateProjectilesDelete
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@ -165,7 +151,8 @@ updateProjectiles:
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lsr
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lsr
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lsr
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sta projectileData+JD_POSY
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sta projectileData+GO_POSY
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cmp #GAMEOBJECTHEIGHT-1
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bmi updateProjectilesDelete
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cmp #201
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bpl updateProjectilesDelete
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@ -189,7 +176,7 @@ updateProjectilesDelete:
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deleteProjectile:
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PROJECTILEPTR_Y
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lda #-1
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sta projectileData+JD_POSX,y
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sta projectileData+GO_POSX,y
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rts
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@ -200,11 +187,11 @@ deleteProjectile:
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renderProjectiles:
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pha
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lda projectileData
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bmi renderProjectilesDone
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bpl renderProjectilesDoIt
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jmp renderProjectilesDone
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lda #projectileData
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sta PARAML0
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jsr renderGameobject
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renderProjectilesDoIt:
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RENDER_GAMEOBJECT projectileData
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renderProjectilesDone:
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pla
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@ -218,11 +205,11 @@ renderProjectilesDone:
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unrenderProjectiles:
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pha
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lda projectileData
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bmi unrenderProjectilesDone
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bpl unrenderProjectilesDoIt
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jmp unrenderProjectilesDone
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lda #projectileData
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sta PARAML0
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jsr unrenderGameobject
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unrenderProjectilesDoIt:
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UNRENDER_GAMEOBJECT projectileData
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unrenderProjectilesDone:
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pla
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