ootw: aliens can shoot. also make laser collision code generic

ootw/TODO

@@ -9,6 +9,11 @@ TODO Before release:
 	l2 -- move doors to final behavior (break room one needs to
 		be locked)
 
+	l2 -- re-activate opening cutscene
+
+	l2 -- shield up in alien hallway
+
+	shooting through shield is broken
 
 MISSING SPRITES:
 ================
@@ -45,6 +50,8 @@ BEHAVIOR DIFFERENCES:
 			we call down.
 			also I think if you wait long enough more aliens
 			appear if you try to go left.
+		- should be able to crouch/shoot
+		- should be able to blast/shield
 
 	* gun behavior:
 		- doors/walls should explode outward away from blast

ootw/alien.s

@@ -179,8 +179,14 @@ done_move_alien_standing:
 	; shooting
 
 move_alien_shooting:
-	
 
+	lda	FRAMEL
+	and	#$3f
+	bne	done_alien_shooting_now
+
+	jsr	fire_alien_laser
+
+done_alien_shooting_now:
 	jmp	done_move_alien
 
 

ootw/alien_laser.s

@@ -22,6 +22,11 @@ fire_alien_laser:
 	lda	laser1_out
 	bne	done_fire_alien_laser
 
+	lda	alien_x,X
+	sta	COLLISION_X
+	lda	alien_y,X
+	sta	COLLISION_Y
+
 	; activate laser slot
 
 	inc	laser1_out
@@ -51,9 +56,12 @@ fire_alien_laser:
 	; set x
 
 alien_laser_left:
+	stx	LASER_TEMP
 
 	jsr	calc_gun_left_collision
 
+	ldx	LASER_TEMP
+
 	lda	alien_x,X
 ;	dex
 	sta	laser1_end
@@ -67,8 +75,12 @@ alien_laser_left:
 
 alien_laser_right:
 
+	stx	LASER_TEMP
+
 	jsr	calc_gun_right_collision
 
+	ldx	LASER_TEMP
+
 	lda	alien_x,X
 	clc
 	adc	#5

ootw/blast.s

@@ -16,6 +16,11 @@ fire_blast:
 	lda	blast0_out
 	bne	done_fire_blast
 
+	lda	PHYSICIST_X
+	sta	COLLISION_X
+	lda	PHYSICIST_Y
+	sta	COLLISION_Y
+
 	; activate blast slot
 
 	inc	blast0_out

ootw/collision.s

@@ -4,10 +4,6 @@ TARGET_SHIELD	= $20
 TARGET_FRIEND	= $30
 TARGET_ALIEN	= $40
 
-; FIXME!!!!
-; if doors/aliens/shields then stop check if X passing them.  URGH.
-
-
 
 	;=============================
 	;=============================
@@ -140,10 +136,10 @@ calc_gun_right_door_loop:
 	lda	(DOOR_Y),Y
 	clc
 	adc	#4
-	cmp	PHYSICIST_Y
+	cmp	COLLISION_Y
 	bne	calc_gun_right_door_continue
 
-	lda	PHYSICIST_X
+	lda	COLLISION_X
 	cmp	(DOOR_X),Y
 	bcs	calc_gun_right_door_continue		; bge
 
@@ -188,7 +184,7 @@ calc_gun_right_shield_loop:
 	lda	shield_out,X
 	beq	calc_gun_right_shield_continue
 
-	lda	PHYSICIST_X
+	lda	COLLISION_X
 	cmp	shield_x,X
 	bcs	calc_gun_right_shield_continue		; bge
 
@@ -225,7 +221,7 @@ calc_gun_right_friend:
 	cmp	WHICH_ROOM
 	bne	done_calc_gun_right_friend_collision
 
-	lda	PHYSICIST_X
+	lda	COLLISION_X
 	cmp	friend_x
 	bcs	calc_gun_right_friend_continue		; bge
 
@@ -269,10 +265,10 @@ calc_gun_right_alien_loop:
 
 	; only if on same level
 	lda	alien_y,X
-	cmp	PHYSICIST_Y
+	cmp	COLLISION_Y
 	bne	calc_gun_right_alien_continue
 
-	lda	PHYSICIST_X
+	lda	COLLISION_X
 	cmp	alien_x,X
 	bcs	calc_gun_right_alien_continue		; bge
 
@@ -354,10 +350,10 @@ calc_gun_left_door_loop:
 	lda	(DOOR_Y),Y
 	clc
 	adc	#4
-	cmp	PHYSICIST_Y
+	cmp	COLLISION_Y
 	bne	calc_gun_left_door_continue
 
-	lda	PHYSICIST_X
+	lda	COLLISION_X
 	cmp	(DOOR_X),Y
 	bcc	calc_gun_left_door_continue		; blt
 
@@ -400,7 +396,7 @@ calc_gun_left_shield_loop:
 	lda	shield_out,X
 	beq	calc_gun_left_shield_continue
 
-	lda	PHYSICIST_X
+	lda	COLLISION_X
 	cmp	shield_x,X
 	bcc	calc_gun_left_shield_continue		; blt
 
@@ -438,7 +434,7 @@ calc_gun_left_friend:
 	cmp	WHICH_ROOM
 	bne	done_calc_gun_left_friend_collision
 
-	lda	PHYSICIST_X
+	lda	COLLISION_X
 	cmp	friend_x
 	bcc	calc_gun_left_friend_continue		; blt
 
@@ -482,10 +478,10 @@ calc_gun_left_alien_loop:
 
 	; only if on same level
 	lda	alien_y,X
-	cmp	PHYSICIST_Y
+	cmp	COLLISION_Y
 	bne	calc_gun_left_alien_continue
 
-	lda	PHYSICIST_X
+	lda	COLLISION_X
 	cmp	alien_x,X
 	bcc	calc_gun_left_alien_continue		; blt
 

ootw/laser.s

@@ -13,6 +13,8 @@
 
 ; should handle shooting while crouching
 
+MAX_LASERS	=	2
+
 laser_out:
 laser0_out:		.byte $0
 laser1_out:		.byte $0
@@ -42,6 +44,10 @@ laser1_count:		.byte $0
 	;=========================
 
 fire_laser:
+	lda	PHYSICIST_X
+	sta	COLLISION_X
+	lda	PHYSICIST_Y
+	sta	COLLISION_Y
 
 	lda	laser0_out
 	bne	done_fire_laser
@@ -112,33 +118,48 @@ done_fire_laser:
 	rts
 
 
+
+
 	;====================
 	; draw laser
 	;====================
 
 draw_laser:
 
-	lda	laser0_out
+	ldx	#0
+draw_laser_loop:
+	lda	laser_out,X
 	beq	done_draw_laser
 
+	txa
+	pha				; save X on stack
+
 	lda	#$10
 	sta	hlin_color_smc+1
 
 	lda	#$0f
 	sta	hlin_mask_smc+1
 
-	ldy	laser0_y
+	ldy	laser_y,X
 
 	sec
-	lda	laser0_end
+	lda	laser_end,X
-	sbc	laser0_start
+	sbc	laser_start,X
-	tax
+	sta	LASER_TEMP
 
-	lda	laser0_start
+	lda	laser_start,X
+
+	ldx	LASER_TEMP
 
 	jsr	hlin
 
+	pla				; restore X from stack
+	tax
+
 done_draw_laser:
+	inx
+	cpx	#MAX_LASERS
+	bne	draw_laser_loop
 
 	rts
 

ootw/ootw_c5.s

@@ -97,6 +97,7 @@ end_message:
 
 .include "gun.s"
 .include "laser.s"
+.include "alien_laser.s"
 .include "blast.s"
 .include "shield.s"
 

ootw/ootw_graphics/sprites/alien.inc

@@ -581,4 +581,20 @@ alien_disintegrating_14:	; 8
 
 
 
+;=====================
+;=====================
+; SHOOTING
+;=====================
+;=====================
+
+alien_shoot_sprite:
+	.byte $5,$8
+	.byte $aa,$7a,$f7,$7f,$aa
+	.byte $aa,$77,$07,$00,$aa
+	.byte $0a,$aa,$00,$77,$aa
+	.byte $aa,$a7,$17,$10,$aa
+	.byte $aa,$aa,$00,$00,$aa
+	.byte $aa,$aa,$77,$a5,$5a
+	.byte $aa,$aa,$07,$aa,$05
+	.byte $aa,$0a,$00,$0a,$00
 

ootw/zp.inc

@@ -56,9 +56,6 @@ LETTERD         = $67
 LETTER          = $68
 BLARGH          = $69
 
-
-;ZPOS		= $78
-
 AY_REGISTERS	= $70
 A_FINE_TONE	= $70
 A_COARSE_TONE	= $71
@@ -94,6 +91,8 @@ PT3_TEMP	= $8A
 ; More zero-page addresses
 ; we try not to conflict with anything DOS, MONITOR or BASIC related
 
+COLLISION_X	= $BE
+COLLISION_Y	= $BF
 
 DOOR_STATUS	= $C0
 DOOR_STATUS_H	= $C1
@@ -111,6 +110,7 @@ BEAST_DEAD	= $CB		; 1
 VENT_OPEN	= $CC		; 2
 INTRO_REPEAT	= $CD		; INTRO
 
+LASER_TEMP	= $CE		; 2+
 LEFT_SHOOT_TARGET = $CF		; ALL
 RIGHT_SHOOT_TARGET = $D0	; ALL