ootw: c4: laser right works

ootw/laser.s

@@ -12,10 +12,10 @@
 
 laser0_out:		.byte $0
 laser0_start:		.byte $0
-laser0_end:		.byte $0
+laser0_length:		.byte $0
 laser0_y:		.byte $0
 laser0_direction:	.byte $0
-
+laser0_count:		.byte $0
 
 	;=========================
 	; fire laser
@@ -26,8 +26,15 @@ fire_laser:
 	lda	laser0_out
 	bne	done_fire_laser
 
+	; activate laser slot
+
 	inc	laser0_out
 
+	; reset count
+
+	lda	#0
+	sta	laser0_count
+
 	; set y
 
 	lda	PHYSICIST_Y
@@ -35,6 +42,8 @@ fire_laser:
 	adc	#4
 	sta	laser0_y
 
+	; set direction
+
 	lda	DIRECTION
 	sta	laser0_direction
 
@@ -43,15 +52,16 @@ fire_laser:
 
 	; set x
 
-
 laser_left:
 
-	ldx	PHYSICIST_X
-	dex
-	stx	laser0_end
-	lda	#0
+	lda	PHYSICIST_X
+	sec
+	sbc	#10
 	sta	laser0_start
 
+	lda	#10
+	sta	laser0_length
+
 	jmp	done_fire_laser
 
 laser_right:
@@ -61,10 +71,8 @@ laser_right:
 	adc	#5
 	sta	laser0_start
 
-	sec
-	lda	#39
-	sbc	TEMP
-	sta	laser0_end
+	lda	#10
+	sta	laser0_length
 
 done_fire_laser:
 	rts
@@ -86,7 +94,7 @@ draw_laser:
 	sta	hlin_mask_smc+1
 
 	ldy	laser0_y
-	ldx	laser0_end
+	ldx	laser0_length
 	lda	laser0_start
 
 	jsr	hlin
@@ -104,23 +112,79 @@ move_laser:
 	lda	laser0_out
 	beq	done_move_laser
 
+	; slow down laser
+	lda	laser0_count
+	and	#$3
+	bne	no_move_laser
+
+	lda	laser0_direction
+	bne	move_laser_right
+
+move_laser_left:
+
+	lda	laser0_count
+	and	#$fe
+	beq	still_shooting_left
+
+continue_shooting_left:
+	lda	laser0_start
+	sec
+	sbc	#20
+	sta	laser0_start
+
+still_shooting_left:
+	lda	#20
+	sta	laser0_length
+
+laser_edge_detect_left:
+
+	lda	laser0_start
+	clc
+	adc	laser0_length
+	bmi	disable_laser
+
+	jmp	no_move_laser
+
+
+move_laser_right:
+
+	lda	laser0_count
+	cmp	#4
+	bcc	still_starting_right
+	cmp	#8
+	bcc	still_shooting_right
+
+continue_shooting_right:
 	lda	laser0_start
 	clc
 	adc	#10
 	sta	laser0_start
-	cmp	#39
+
+still_shooting_right:
+	lda	#20
+	sta	laser0_length
+
+still_starting_right:
+
+laser_edge_detect_right:
+
+	; detect if totally off screen
+	lda	laser0_start
+	cmp	#40
 	bcs	disable_laser
 
-	lda	laser0_start
 	clc
-	adc	#20
+	adc	laser0_length
 	cmp	#40
-	bcc	done_laser_len		; blt
+	bcc	no_move_laser
 
 	lda	#39
+	sec
+	sbc	laser0_start
+	sta	laser0_length
 
-done_laser_len:
-	sta	laser0_end
+no_move_laser:
+	inc	laser0_count
 
 done_move_laser: