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82 lines
1.2 KiB
ArmAsm
82 lines
1.2 KiB
ArmAsm
;
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; players
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; Code and data structures related to the players
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;
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; Created by Quinn Dunki on 8/13/17
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;
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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 45 ; Angle in degrees from +X
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.word 50 ; Power
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PD_ANGLE = 4 ; Byte offsets into player data structure
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PD_POS = 6
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.macro PLAYERPTR_Y
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tya ; Pointer to player structure from index
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asl
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asl
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asl
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tay
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.endmacro
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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; playerDeltaAngle
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;
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; Y = Player index
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; X = Delta
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;
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playerDeltaAngle:
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SAVE_AXY
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PLAYERPTR_Y
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txa
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clc
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adc playerData+PD_ANGLE,y
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bmi playerDeltaAngleClampLow
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cmp #180
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bpl playerDeltaAngleClampHigh
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playerDeltaAngleStore:
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sta playerData+PD_ANGLE,y
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RESTORE_AXY
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rts
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playerDeltaAngleClampLow:
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lda #0
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bra playerDeltaAngleStore
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playerDeltaAngleClampHigh:
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lda #180
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bra playerDeltaAngleStore
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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; renderPlayerHeader
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;
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; Y = Player index to render
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;
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renderPlayerHeader:
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SAVE_AXY
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PLAYERPTR_Y
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ldx #0
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lda #angleStr
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jsr DrawString
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lda playerData+PD_ANGLE,y
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ldx #24
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jsr drawNumber
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RESTORE_AXY
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rts
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angleStr:
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pstring "ANGLE: "
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