mirror of
https://github.com/blondie7575/GSCats.git
synced 2024-11-22 06:31:48 +00:00
709 lines
10 KiB
ArmAsm
709 lines
10 KiB
ArmAsm
;
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; gameobject
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; Code and data structures related to the game objects
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;
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; Created by Quinn Dunki on 8/13/17
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;
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GAMEOBJECTWIDTH = 16
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GAMEOBJECTHEIGHT = 16
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; Base class sample:
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;gameobjectData:
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; .word 40 ; X pos in pixels (from right 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 64 bytes
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; .word 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
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; .word 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
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; .word 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
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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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; placeGameObjectOnTerrain
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;
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; PARAML0 = Pointer to gameobject data
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; Trashes SCRATCHL
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;
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placeGameObjectOnTerrain:
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SAVE_AY
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ldy #GO_POSX
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lda (PARAML0),y
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clc ; Map into reversed terrain X space
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adc #GAMEOBJECTWIDTH
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sta SCRATCHL
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lda #TERRAINWIDTH
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sec
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sbc SCRATCHL
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and #$fffe ; Force even
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tay
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lda terrainData,y
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clc
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adc #GAMEOBJECTHEIGHT
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ldy #GO_POSY
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sta (PARAML0),y
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RESTORE_AY
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rts
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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; RENDER_GAMEOBJECT
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;
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; ptr = Pointer to gameobject data
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; Trashes SCRATCHL
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;
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.macro RENDER_GAMEOBJECT ptr,compiledSprite
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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 ptr+GO_POSX,y
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lsr
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cmp leftScreenEdge
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bmi renderGameobjectSkip ; Gameobject is off left edge of screen
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cmp rightScreenEdge
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bpl renderGameobjectSkip ; Gameobject is off right edge of screen
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sec ; Convert byte x-pos to screenspace
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sbc leftScreenEdge
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sta SCRATCHL
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; Y
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sec
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lda #200
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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 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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adc #$2000
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tax ; X now contains the bank address of the upper left corner
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phx
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bra renderGameobjectBackground
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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 VRAMBANK,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 VRAMBANK+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 VRAMBANK+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 VRAMBANK+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 VRAMBANK+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 VRAMBANK+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 VRAMBANK+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 VRAMBANK+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 VRAMBANK+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 VRAMBANK+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 VRAMBANK+160*2+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 VRAMBANK+160*2+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 VRAMBANK+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 VRAMBANK+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 VRAMBANK+160*3+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 VRAMBANK+160*3+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 VRAMBANK+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 VRAMBANK+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 VRAMBANK+160*4+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 VRAMBANK+160*4+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 VRAMBANK+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 VRAMBANK+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 VRAMBANK+160*5+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 VRAMBANK+160*5+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 VRAMBANK+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 VRAMBANK+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 VRAMBANK+160*6+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 VRAMBANK+160*6+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 VRAMBANK+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 VRAMBANK+160*7+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 VRAMBANK+160*7+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 VRAMBANK+160*7+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 VRAMBANK+160*8,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 VRAMBANK+160*8+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 VRAMBANK+160*8+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 VRAMBANK+160*8+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 VRAMBANK+160*9,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 VRAMBANK+160*9+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 VRAMBANK+160*9+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 VRAMBANK+160*9+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 VRAMBANK+160*10,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 VRAMBANK+160*10+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 VRAMBANK+160*10+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 VRAMBANK+160*10+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 VRAMBANK+160*11,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 VRAMBANK+160*11+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 VRAMBANK+160*11+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 VRAMBANK+160*11+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 VRAMBANK+160*12,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 VRAMBANK+160*12+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 VRAMBANK+160*12+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 VRAMBANK+160*12+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 VRAMBANK+160*13,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 VRAMBANK+160*13+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 VRAMBANK+160*13+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 VRAMBANK+160*13+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 VRAMBANK+160*14,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 VRAMBANK+160*14+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 VRAMBANK+160*14+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 VRAMBANK+160*14+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 VRAMBANK+160*15,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 VRAMBANK+160*15+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 VRAMBANK+160*15+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 VRAMBANK+160*15+6,x
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sta ptr+GO_BACKGROUND,y
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; Draw sprite
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ply
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lda #compiledSprite
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jsr drawSprite
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renderGameobjectDone:
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RESTORE_AXY
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.endscope
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.endmacro
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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; UNRENDER_GAMEOBJECT
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;
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; ptr = Pointer to gameobject data
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; Trashes SCRATCHL
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;
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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 ptr+GO_POSX,y
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lsr
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cmp leftScreenEdge
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bmi unrenderGameobjectSkip ; Gameobject is off left edge of screen
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cmp rightScreenEdge
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bpl unrenderGameobjectSkip ; Gameobject is off right edge of screen
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sec
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sbc leftScreenEdge
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sta SCRATCHL
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; Y
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sec
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lda #200
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sbc ptr+GO_POSY,y
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bmi unrenderGameobjectSkip ; Gameobject is off top edge of screen
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cmp #200 - GAMEOBJECTHEIGHT
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bpl unrenderGameobjectSkip ; 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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adc #$2000
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tax ; X now contains the VRAM offset of the upper left corner
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bra unrenderGameobjectBackground
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unrenderGameobjectSkip:
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jmp unrenderGameobjectDone
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unrenderGameobjectBackground:
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lda ptr+GO_BACKGROUND,y
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sta VRAMBANK,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 VRAMBANK+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 VRAMBANK+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 VRAMBANK+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 VRAMBANK+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 VRAMBANK+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 VRAMBANK+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 VRAMBANK+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 VRAMBANK+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 VRAMBANK+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 VRAMBANK+160*2+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 VRAMBANK+160*2+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 VRAMBANK+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 VRAMBANK+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 VRAMBANK+160*3+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 VRAMBANK+160*3+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 VRAMBANK+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 VRAMBANK+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 VRAMBANK+160*4+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 VRAMBANK+160*4+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 VRAMBANK+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 VRAMBANK+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 VRAMBANK+160*5+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 VRAMBANK+160*5+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 VRAMBANK+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 VRAMBANK+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 VRAMBANK+160*6+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 VRAMBANK+160*6+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 VRAMBANK+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 VRAMBANK+160*7+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 VRAMBANK+160*7+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 VRAMBANK+160*7+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 VRAMBANK+160*8,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 VRAMBANK+160*8+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 VRAMBANK+160*8+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 VRAMBANK+160*8+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 VRAMBANK+160*9,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 VRAMBANK+160*9+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 VRAMBANK+160*9+4,x
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iny
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iny
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lda ptr+GO_BACKGROUND,y
|
|
sta VRAMBANK+160*9+6,x
|
|
iny
|
|
iny
|
|
|
|
lda ptr+GO_BACKGROUND,y
|
|
sta VRAMBANK+160*10,x
|
|
iny
|
|
iny
|
|
lda ptr+GO_BACKGROUND,y
|
|
sta VRAMBANK+160*10+2,x
|
|
iny
|
|
iny
|
|
lda ptr+GO_BACKGROUND,y
|
|
sta VRAMBANK+160*10+4,x
|
|
iny
|
|
iny
|
|
lda ptr+GO_BACKGROUND,y
|
|
sta VRAMBANK+160*10+6,x
|
|
iny
|
|
iny
|
|
|
|
lda ptr+GO_BACKGROUND,y
|
|
sta VRAMBANK+160*11,x
|
|
iny
|
|
iny
|
|
lda ptr+GO_BACKGROUND,y
|
|
sta VRAMBANK+160*11+2,x
|
|
iny
|
|
iny
|
|
lda ptr+GO_BACKGROUND,y
|
|
sta VRAMBANK+160*11+4,x
|
|
iny
|
|
iny
|
|
lda ptr+GO_BACKGROUND,y
|
|
sta VRAMBANK+160*11+6,x
|
|
iny
|
|
iny
|
|
|
|
lda ptr+GO_BACKGROUND,y
|
|
sta VRAMBANK+160*12,x
|
|
iny
|
|
iny
|
|
lda ptr+GO_BACKGROUND,y
|
|
sta VRAMBANK+160*12+2,x
|
|
iny
|
|
iny
|
|
lda ptr+GO_BACKGROUND,y
|
|
sta VRAMBANK+160*12+4,x
|
|
iny
|
|
iny
|
|
lda ptr+GO_BACKGROUND,y
|
|
sta VRAMBANK+160*12+6,x
|
|
iny
|
|
iny
|
|
|
|
lda ptr+GO_BACKGROUND,y
|
|
sta VRAMBANK+160*13,x
|
|
iny
|
|
iny
|
|
lda ptr+GO_BACKGROUND,y
|
|
sta VRAMBANK+160*13+2,x
|
|
iny
|
|
iny
|
|
lda ptr+GO_BACKGROUND,y
|
|
sta VRAMBANK+160*13+4,x
|
|
iny
|
|
iny
|
|
lda ptr+GO_BACKGROUND,y
|
|
sta VRAMBANK+160*13+6,x
|
|
iny
|
|
iny
|
|
|
|
lda ptr+GO_BACKGROUND,y
|
|
sta VRAMBANK+160*14,x
|
|
iny
|
|
iny
|
|
lda ptr+GO_BACKGROUND,y
|
|
sta VRAMBANK+160*14+2,x
|
|
iny
|
|
iny
|
|
lda ptr+GO_BACKGROUND,y
|
|
sta VRAMBANK+160*14+4,x
|
|
iny
|
|
iny
|
|
lda ptr+GO_BACKGROUND,y
|
|
sta VRAMBANK+160*14+6,x
|
|
iny
|
|
iny
|
|
|
|
lda ptr+GO_BACKGROUND,y
|
|
sta VRAMBANK+160*15,x
|
|
iny
|
|
iny
|
|
lda ptr+GO_BACKGROUND,y
|
|
sta VRAMBANK+160*15+2,x
|
|
iny
|
|
iny
|
|
lda ptr+GO_BACKGROUND,y
|
|
sta VRAMBANK+160*15+4,x
|
|
iny
|
|
iny
|
|
lda ptr+GO_BACKGROUND,y
|
|
sta VRAMBANK+160*15+6,x
|
|
|
|
unrenderGameobjectDone:
|
|
RESTORE_AXY
|
|
.endscope
|
|
.endmacro
|