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https://github.com/sehugg/8bitworkshop.git
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70 lines
993 B
Plaintext
70 lines
993 B
Plaintext
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component VersatilePlayfield
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data: array of 0..255 baseoffset -1
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end
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system VersatilePlayfield
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locals 2
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on preframe do with [VersatilePlayfield]
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---
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lda {{<data}}
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sta {{$0}}
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lda {{>data}}
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sta {{$1}}
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---
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on scanline do once
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---
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.if {{arg 0}} = 0
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lda ({{local 0}}),y
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tax
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.endif
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---
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on scanline do once
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---
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.if {{arg 0}} = 1
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lda ({{local 0}}),y
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sta $00,x
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.endif
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---
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on postframe do once
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---
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lda #0
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sta PF0
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sta PF1
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sta PF2
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---
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on checkplatform do with [HasXpos,HasYpos]
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---
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lda {{<xpos}}
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clc
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adc #6
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lsr
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lsr
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tay
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lda {{^PFCollideMask}},y
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pha
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lda {{^PFCollideReg}},y
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pha
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lda #176 ; TODO: adjust for kernel size
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sec
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sbc {{<ypos}}
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and #$fe
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tay
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; TODO: use system local pointer
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pla
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cmp ({{$0}}),y ; match register?
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bne @nostop1
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dey
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pla
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and ({{$0}}),y ; mask bitmap?
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beq @nostop
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{{!platformstopped}}
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jmp @done
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@nostop1:
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pla
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@nostop:
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{{!platformnotstopped}}
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@done:
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---
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end
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