mirror of
https://github.com/jeremysrand/BuGS.git
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280 lines
6.3 KiB
ArmAsm
280 lines
6.3 KiB
ArmAsm
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; gameSpider.s
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; BuGS
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;
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; Created by Jeremy Rand on 2020-07-23.
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;Copyright © 2020 Jeremy Rand. All rights reserved.
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;
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case on
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mcopy gameSpider.macros
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keep gameSpider
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gameSpider start
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using globalData
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SPIDER_STATE_NONE equ 0
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SPIDER_STATE_LEFT_DIAG_DOWN equ 1
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SPIDER_STATE_LEFT_DIAG_UP equ 2
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SPIDER_STATE_LEFT_DOWN equ 3
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SPIDER_STATE_LEFT_UP equ 4
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SPIDER_STATE_RIGHT_DIAG_DOWN equ 5
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SPIDER_STATE_RIGHT_DIAG_UP equ 6
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SPIDER_STATE_RIGHT_DOWN equ 7
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SPIDER_STATE_RIGHT_UP equ 8
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SPIDER_STATE_EXPLODING equ 9
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drawSpider entry
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lda spiderState
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bne drawSpider_cont
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rtl
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drawSpider_cont anop
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ldy spiderScreenOffset
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ldx spiderSprite
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jsl spiderJump
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ldx spiderTileOffsets
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lda tiles+TILE_DIRTY_OFFSET,x
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bne drawSpider_skipTile1
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lda #TILE_STATE_DIRTY
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sta tiles+TILE_DIRTY_OFFSET,x
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txa
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cmp #RHS_FIRST_TILE_OFFSET
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bge drawSpider_nonGame1
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ldy numDirtyGameTiles
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sta dirtyGameTiles,y
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iny
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iny
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sty numDirtyGameTiles
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bra drawSpider_skipTile1
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drawSpider_nonGame1 anop
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ldy numDirtyNonGameTiles
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sta dirtyNonGameTiles,y
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iny
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iny
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sty numDirtyNonGameTiles
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drawSpider_skipTile1 anop
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ldx spiderTileOffsets+2
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lda tiles+TILE_DIRTY_OFFSET,x
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bne drawSpider_skipTile2
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lda #TILE_STATE_DIRTY
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sta tiles+TILE_DIRTY_OFFSET,x
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txa
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cmp #RHS_FIRST_TILE_OFFSET
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bge drawSpider_nonGame2
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ldy numDirtyGameTiles
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sta dirtyGameTiles,y
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iny
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iny
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sty numDirtyGameTiles
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bra drawSpider_skipTile2
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drawSpider_nonGame2 anop
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ldy numDirtyNonGameTiles
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sta dirtyNonGameTiles,y
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iny
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iny
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sty numDirtyNonGameTiles
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drawSpider_skipTile2 anop
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ldx spiderTileOffsets+4
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lda tiles+TILE_DIRTY_OFFSET,x
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bne drawSpider_skipTile3
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lda #TILE_STATE_DIRTY
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sta tiles+TILE_DIRTY_OFFSET,x
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txa
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cmp #RHS_FIRST_TILE_OFFSET
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bge drawSpider_nonGame3
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ldy numDirtyGameTiles
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sta dirtyGameTiles,y
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iny
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iny
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sty numDirtyGameTiles
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bra drawSpider_skipTile3
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drawSpider_nonGame3 anop
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ldy numDirtyNonGameTiles
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sta dirtyNonGameTiles,y
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iny
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iny
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sty numDirtyNonGameTiles
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drawSpider_skipTile3 anop
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ldx spiderTileOffsets+6
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lda tiles+TILE_DIRTY_OFFSET,x
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bne drawSpider_skipTile4
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lda #TILE_STATE_DIRTY
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sta tiles+TILE_DIRTY_OFFSET,x
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txa
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cmp #RHS_FIRST_TILE_OFFSET
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bge drawSpider_nonGame4
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ldy numDirtyGameTiles
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sta dirtyGameTiles,y
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iny
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iny
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sty numDirtyGameTiles
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bra drawSpider_skipTile4
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drawSpider_nonGame4 anop
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ldy numDirtyNonGameTiles
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sta dirtyNonGameTiles,y
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iny
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iny
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sty numDirtyNonGameTiles
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drawSpider_skipTile4 anop
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ldx spiderTileOffsets+8
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lda tiles+TILE_DIRTY_OFFSET,x
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bne drawSpider_skipTile5
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lda #TILE_STATE_DIRTY
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sta tiles+TILE_DIRTY_OFFSET,x
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txa
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cmp #RHS_FIRST_TILE_OFFSET
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bge drawSpider_nonGame5
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ldy numDirtyGameTiles
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sta dirtyGameTiles,y
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iny
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iny
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sty numDirtyGameTiles
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bra drawSpider_skipTile5
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drawSpider_nonGame5 anop
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ldy numDirtyNonGameTiles
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sta dirtyNonGameTiles,y
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iny
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iny
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sty numDirtyNonGameTiles
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drawSpider_skipTile5 anop
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ldx spiderTileOffsets+2
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lda tiles+TILE_DIRTY_OFFSET,x
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bne drawSpider_done
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lda #TILE_STATE_DIRTY
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sta tiles+TILE_DIRTY_OFFSET,x
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txa
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cmp #RHS_FIRST_TILE_OFFSET
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bge drawSpider_nonGame6
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ldy numDirtyGameTiles
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sta dirtyGameTiles,y
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iny
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iny
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sty numDirtyGameTiles
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rtl
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drawSpider_nonGame6 anop
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ldy numDirtyNonGameTiles
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sta dirtyNonGameTiles,y
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iny
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iny
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sty numDirtyNonGameTiles
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drawSpider_done anop
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rtl
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spiderJump entry
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cmp #SPIDER_STATE_EXPLODING
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beq spiderJump_exploding
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lda spiderScreenShift
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beq spiderJump_shift
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lda spiderJumpTable,x
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sta jumpInst+1
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lda spiderJumpTable+2,x
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sta jumpInst+3
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bra jumpInst
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spiderJump_shift anop
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lda spiderShiftJumpTable,x
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sta jumpInst+1
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lda spiderShiftJumpTable+2,x
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sta jumpInst+3
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bra jumpInst
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spiderJump_exploding anop
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tya
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clc
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adc #TILE_BYTE_WIDTH
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tay
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lda explosionJumpTable,x
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sta jumpInst+1
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lda explosionJumpTable+2,x
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sta jumpInst+3
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jumpInst jmp >spider1
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nop
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updateSpider entry
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; Write this code
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rtl
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addSpider entry
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lda spiderState
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bne addSpider_done
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lda #SPIDER_STATE_RIGHT_DOWN
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sta spiderState
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stz spiderScreenShift
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; Write this code
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addSpider_done anop
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rtl
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shootSpider entry
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; Write this code
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rtl
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spiderState dc i2'SPIDER_STATE_NONE'
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spiderSprite dc i2'0'
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spiderScreenOffset dc i2'0'
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spiderScreenShift dc i2'0'
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spiderShiftInTile dc i2'0'
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spiderTileOffsets dc i2'0'
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dc i2'0'
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dc i2'0'
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dc i2'0'
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dc i2'0'
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dc i2'0'
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SPIDER_SPRITE_LAST_OFFSET gequ 7*4
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spiderJumpTable dc i4'spider7'
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dc i4'spider6'
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dc i4'spider2'
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dc i4'spider3'
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dc i4'spider4'
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dc i4'spider3'
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dc i4'spider2'
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dc i4'spider1'
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spiderShiftJumpTable dc i4'spider7s'
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dc i4'spider6s'
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dc i4'spider2s'
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dc i4'spider3s'
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dc i4'spider4s'
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dc i4'spider3s'
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dc i4'spider2s'
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dc i4'spider1s'
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end
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