Fix tabs.

Platform/Apple/virtual/src/raycast/render.s

@@ -806,6 +806,23 @@ spriteCalc: !zone
 	sta .wSize
 	stx .wSize+1
 
+	; Calculate wSpriteTop = 32 - (wSize >> 1);
+	tay			; stash lo byte of wSize
+	txa			; work on hi byte
+	lsr			; shift right 1 bit
+	tax			; save hi byte to X
+	tya			; work on lo byte
+	ror			; shift right including bit from hi byte
+	tay			; lo byte to Y
+	jsr .invYX		; invert it
+	tya			; lo byte
+	clc
+	adc #32			; add 32
+	sta .wSpriteTop		; save sprite top
+	bcc +			; if no carry, no bump
+	inx			; bump hi byte
++	stx .wSpriteTop+1	; save hi byte
+
 	; Calculate wX = bSgnRy * pow2_w_w(log2_w_w(wRy) - wLogDist + log2_w_w(252 / 8 / 0.44))
 	; Note: log2_w_w(252 / 8 / 0.44) = $626
 	lda .wLogRy		; calc wRy minus wLogDist, lo byte
@@ -826,6 +843,20 @@ spriteCalc: !zone
 	sta .wX
 	stx .wX+1
 
+	; Calculate spriteLeft = (63/2) + wX - wHalfSize = 31 + wX - wHalfSize
+	clc
+	adc #31			; we already have lo byte of wX in A
+	bcc +			; if no carry, don't bump hi byte
+	inx			; bump hi byte
++	sec
+	sbc .wHalfSize		; now subtract lo byte of wHalfSize
+	sta .spriteLeft		; save lo byte
+	txa
+	sbc .wHalfSize+1	; now work on hi byte
+	sta .spriteLeft+1	; save hi byte
+
+
+
 	; TODO: finish this routine
 
 .negYX:				; subroutine to negate value in Y=lo,X=hi.