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59 lines
980 B
ArmAsm
59 lines
980 B
ArmAsm
;
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; projectile
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; Code and data structures related to the projectiles
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;
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; Created by Quinn Dunki on 8/13/17
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;
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projectileData:
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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 ; Velocity (8.8 fixed point)
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JD_V = 4 ; Byte offsets into projectile data structure
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projectileParams:
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.word 0 ; Starting pos X
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.word 0 ; Starting pos Y
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.word 0 ; Initial angle
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.word 0 ; Initial power
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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; fireProjectile
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;
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; PARAML0 = Pointer to projectileParams
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;
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; Trashes SCRATCHL
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;
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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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ldx #0
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lda #projectileData ; Only one active at a tiem for now
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sta SCRATCHL
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; lda (PARAML0),x ; X pos
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; sta (SCRATCHL),y
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; inx
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; inx
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; iny
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; iny
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; lda (PARAML0),x ; Y pos
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; sta (SCRATCHL),y
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; inx
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; inx
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; lda (PARAML0),x ;
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fireProjectileLoop:
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RESTORE_AXY
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rts
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