Projectile refactoring madness (#19878)

Refactored the projectile code, mostly in line with TG's now.
Refactored various procs that are used or depends on it.
Projectiles can now ricochet if enabled to.
Damage falloffs with distance.
Homing projectiles can now have accuracy falloff with distance.
Projectiles have a maximum range.
Muzzle flash is configurable per projectile.
Impact effect of the projectile is configurable per projectile.
Accuracy decreases with distance.
Projectiles work with signals and emits them, for easy hooking up from
other parts of the code.
Meatshielding is now less effective .
Impact sound is now configurable per projectile.

High risk.

code/game/objects/structures/barricades/_barricade.dm

@@ -83,6 +83,8 @@
 	return prob(max(30,(100.0*health)/maxhealth))
 
 /obj/structure/barricade/CanPass(atom/movable/mover, turf/target, height=0, air_group=0)
+	if(mover?.movement_type & PHASING)
+		return TRUE
 	if(air_group || (height==0))
 		return TRUE
 	if(istype(mover, /obj/projectile))
@@ -197,11 +199,14 @@
 			playsound(src, barricade_hitsound, 25, 1)
 		hit_barricade(attacking_item, user)
 
-/obj/structure/barricade/bullet_act(obj/projectile/P)
-	bullet_ping(P)
-	var/damage_to_take = P.damage * P.anti_materiel_potential
+/obj/structure/barricade/bullet_act(obj/projectile/hitting_projectile, def_zone, piercing_hit)
+	. = ..()
+	if(. != BULLET_ACT_HIT)
+		return .
+
+	bullet_ping(hitting_projectile)
+	var/damage_to_take = hitting_projectile.damage * hitting_projectile.anti_materiel_potential
 	take_damage(damage_to_take)
-	return TRUE
 
 /obj/structure/barricade/proc/barricade_deconstruct(deconstruct)
 	if(deconstruct && is_wired)

code/game/objects/structures/bonfire.dm

@@ -382,6 +382,8 @@ GLOBAL_LIST_EMPTY(total_active_bonfires)
 		AddOverlays("fireplace_glow")
 
 /obj/structure/bonfire/fireplace/CanPass(atom/movable/mover, turf/target, height=0, air_group=0)
+	if(mover?.movement_type & PHASING)
+		return TRUE
 	if(get_dir(loc, target) == NORTH)
 		return !density
 	return TRUE

code/game/objects/structures/crates_lockers/closets.dm

@@ -150,7 +150,8 @@
 	return content_size
 
 /obj/structure/closet/CanPass(atom/movable/mover, turf/target, height=0, air_group=0)
-	if(air_group || (height==0 || wall_mounted)) return 1
+	if(air_group || (height==0 || wall_mounted))
+		return TRUE
 	return ..()
 
 /obj/structure/closet/proc/can_open()
@@ -316,17 +317,19 @@
 		new /obj/item/stack/material/steel(get_turf(src))
 		qdel(src)
 
-/obj/structure/closet/bullet_act(var/obj/projectile/Proj)
-	var/proj_damage = Proj.get_structure_damage()
+/obj/structure/closet/bullet_act(obj/projectile/hitting_projectile, def_zone, piercing_hit)
+	. = ..()
+	if(. != BULLET_ACT_HIT)
+		return .
+
+	var/proj_damage = hitting_projectile.get_structure_damage()
 	if(!proj_damage)
-		return
+		return BULLET_ACT_BLOCK
 
-	if(Proj.penetrating || istype(Proj, /obj/projectile/bullet))
-		var/distance = get_dist(Proj.starting, get_turf(loc))
+	if(hitting_projectile.penetrating || istype(hitting_projectile, /obj/projectile/bullet))
 		for(var/mob/living/L in contents)
-			Proj.attack_mob(L, distance)
+			hitting_projectile.Impact(L)
 
-	..()
 	damage(proj_damage)
 
 /obj/structure/closet/attackby(obj/item/attacking_item, mob/user)

code/game/objects/structures/crates_lockers/closets/statue.dm

@@ -124,11 +124,13 @@
 		for(var/mob/M in src)
 			shatter(M)
 
-/obj/structure/closet/statue/bullet_act(var/obj/projectile/Proj)
-	health -= Proj.get_structure_damage()
-	check_health()
+/obj/structure/closet/statue/bullet_act(obj/projectile/hitting_projectile, def_zone, piercing_hit)
+	. = ..()
+	if(. != BULLET_ACT_HIT)
+		return .
 
-	return
+	health -= hitting_projectile.get_structure_damage()
+	check_health()
 
 /obj/structure/closet/statue/attack_generic(var/mob/user, damage, attacktext, environment_smash)
 	user.setClickCooldown(DEFAULT_ATTACK_COOLDOWN)

code/game/objects/structures/crates_lockers/crates.dm

@@ -97,6 +97,8 @@
 ==========================
 */
 /obj/structure/closet/crate/CanPass(atom/movable/mover, turf/target, height=0, air_group=0)
+	if(mover?.movement_type & PHASING)
+		return TRUE
 	if (istype(mover, /obj/structure/closet/crate))//Handle interaction with other crates
 		var/obj/structure/closet/crate/C = mover
 		if (tablestatus && tablestatus != C.tablestatus) // Crates can go under tables with crates on top of them, and vice versa

code/game/objects/structures/curtains.dm

@@ -20,12 +20,14 @@
 	layer = ABOVE_HUMAN_LAYER
 	opacity = 0
 
-/obj/structure/curtain/bullet_act(obj/projectile/P, def_zone)
-	if(!P.nodamage)
-		visible_message(SPAN_WARNING("[P] tears [src] down!"))
+/obj/structure/curtain/bullet_act(obj/projectile/hitting_projectile, def_zone, piercing_hit)
+	. = ..()
+	if(. != BULLET_ACT_HIT)
+		return .
+
+	if(hitting_projectile.damage > 0)
+		visible_message(SPAN_WARNING("[hitting_projectile] tears [src] down!"))
 		qdel(src)
-	else
-		..(P, def_zone)
 
 /obj/structure/curtain/attack_hand(mob/user)
 	playsound(get_turf(loc), 'sound/effects/curtain.ogg', 15, 1, -5)

code/game/objects/structures/displaycase.dm

@@ -34,9 +34,12 @@
 				health_check()
 
 
-/obj/structure/displaycase/bullet_act(var/obj/projectile/Proj)
-	health -= Proj.get_structure_damage()
-	..()
+/obj/structure/displaycase/bullet_act(obj/projectile/hitting_projectile, def_zone, piercing_hit)
+	. = ..()
+	if(. != BULLET_ACT_HIT)
+		return .
+
+	health -= hitting_projectile.get_structure_damage()
 	health_check()
 
 /obj/structure/displaycase/proc/health_check()

code/game/objects/structures/full_window_frame.dm

@@ -48,6 +48,8 @@
 /obj/structure/window_frame/CanPass(atom/movable/mover, turf/target, height=0, air_group=0)
 	if(air_group || (height == 0))
 		return TRUE
+	if(mover?.movement_type & PHASING)
+		return TRUE
 	if(istype(mover, /obj/structure/closet/crate))
 		return TRUE
 	if(istype(mover) && mover.pass_flags & PASSTABLE)

code/game/objects/structures/girders.dm

@@ -41,16 +41,16 @@
 	health = 50
 	cover = 25
 
-/obj/structure/girder/bullet_act(var/obj/projectile/Proj)
+/obj/structure/girder/bullet_act(obj/projectile/hitting_projectile, def_zone, piercing_hit)
 	//Girders only provide partial cover. There's a chance that the projectiles will just pass through. (unless you are trying to shoot the girder)
-	if(Proj.original != src && !prob(cover))
-		return PROJECTILE_CONTINUE //pass through
+	if(hitting_projectile.original != src && !prob(cover))
+		return BULLET_ACT_HIT //pass through
 
-	var/damage = Proj.get_structure_damage()
+	var/damage = hitting_projectile.get_structure_damage()
 	if(!damage)
-		return
+		return BULLET_ACT_BLOCK
 
-	if(!istype(Proj, /obj/projectile/beam))
+	if(!istype(hitting_projectile, /obj/projectile/beam))
 		damage *= 0.4 //non beams do reduced damage
 
 	take_damage(damage)
@@ -376,6 +376,8 @@
 /obj/structure/girder/CanPass(atom/movable/mover, turf/target, height=0, air_group=0)
 	if (!mover)
 		return 1
+	if(mover?.movement_type & PHASING)
+		return TRUE
 	if(istype(mover,/obj/projectile) && density)
 		if (prob(50))
 			return 1

code/game/objects/structures/gore/core.dm

@@ -31,10 +31,13 @@
 		visible_message(SPAN_WARNING(final_message))
 		qdel(src)
 
-/obj/structure/gore/bullet_act(var/obj/projectile/Proj)
-	health -= Proj.damage
+/obj/structure/gore/bullet_act(obj/projectile/hitting_projectile, def_zone, piercing_hit)
+	. = ..()
+	if(. != BULLET_ACT_HIT)
+		return .
+
+	health -= hitting_projectile.damage
 	healthcheck()
-	return ..()
 
 /obj/structure/gore/ex_act(severity)
 	switch(severity)
@@ -78,6 +81,8 @@
 /obj/structure/gore/CanPass(atom/movable/mover, turf/target, height=0, air_group=0)
 	if(air_group)
 		return FALSE
+	if(mover?.movement_type & PHASING)
+		return TRUE
 	if(istype(mover) && mover.pass_flags & PASSGLASS)
 		return !opacity
 	return !density

code/game/objects/structures/grille.dm

@@ -103,45 +103,54 @@
 	attack_generic(user,damage_dealt,attack_message)
 
 /obj/structure/grille/CanPass(atom/movable/mover, turf/target, height=0, air_group=0)
-	if(air_group || (height==0)) return 1
+	if(air_group || (height==0))
+		return TRUE
+	if(mover?.movement_type & PHASING)
+		return TRUE
 	if(istype(mover) && mover.pass_flags & PASSGRILLE)
-		return 1
+		return TRUE
 	else
 		if(istype(mover, /obj/projectile))
 			return prob(30)
 		else
 			return !density
 
-/obj/structure/grille/bullet_act(var/obj/projectile/Proj)
-	if(!Proj)	return
+/obj/structure/grille/bullet_act(obj/projectile/hitting_projectile, def_zone, piercing_hit)
+	. = ..()
+	if(. != BULLET_ACT_HIT)
+		return .
+
+	if(!hitting_projectile)
+		return BULLET_ACT_BLOCK
 
 	//Flimsy grilles aren't so great at stopping projectiles. However they can absorb some of the impact
-	var/damage = Proj.get_structure_damage()
+	var/damage = hitting_projectile.get_structure_damage()
 	var/passthrough = 0
 
-	if(!damage) return
+	if(!damage)
+		return BULLET_ACT_BLOCK
 
 	//20% chance that the grille provides a bit more cover than usual. Support structure for example might take up 20% of the grille's area.
 	//If they click on the grille itself then we assume they are aiming at the grille itself and the extra cover behaviour is always used.
-	switch(Proj.damage_type)
+	switch(hitting_projectile.damage_type)
 		if(DAMAGE_BRUTE)
 			//bullets
-			if(Proj.original == src || prob(20))
-				Proj.damage *= between(0, Proj.damage/60, 0.5)
+			if(hitting_projectile.original == src || prob(20))
+				hitting_projectile.damage *= between(0, hitting_projectile.damage/60, 0.5)
 				if(prob(max((damage-10)/25, 0))*100)
 					passthrough = 1
 			else
-				Proj.damage *= between(0, Proj.damage/60, 1)
+				hitting_projectile.damage *= between(0, hitting_projectile.damage/60, 1)
 				passthrough = 1
 		if(DAMAGE_BURN)
 			//beams and other projectiles are either blocked completely by grilles or stop half the damage.
-			if(!(Proj.original == src || prob(20)))
-				Proj.damage *= 0.5
+			if(!(hitting_projectile.original == src || prob(20)))
+				hitting_projectile.damage *= 0.5
 				passthrough = 1
 
 	if(passthrough)
-		. = PROJECTILE_CONTINUE
-		damage = between(0, (damage - Proj.damage)*(Proj.damage_type == DAMAGE_BRUTE? 0.4 : 1), 10) //if the bullet passes through then the grille avoids most of the damage
+		. = BULLET_ACT_HIT
+		damage = between(0, (damage - hitting_projectile.damage)*(hitting_projectile.damage_type == DAMAGE_BRUTE? 0.4 : 1), 10) //if the bullet passes through then the grille avoids most of the damage
 
 	src.health -= damage*0.2
 	spawn(0) healthcheck() //spawn to make sure we return properly if the grille is deleted
@@ -313,7 +322,7 @@
 /obj/structure/grille/cult/CanPass(atom/movable/mover, turf/target, height = 1.5, air_group = 0)
 	if(air_group)
 		return 0 //Make sure air doesn't drain
-	..()
+	. = ..()
 
 /obj/structure/grille/crescent/attack_hand()
 	return
@@ -329,6 +338,3 @@
 
 /obj/structure/grille/crescent/hitby(atom/movable/hitting_atom, skipcatch, hitpush, blocked, datum/thrownthing/throwingdatum)
 	return
-
-/obj/structure/grille/crescent/bullet_act()
-	return

code/game/objects/structures/hadii_statue.dm

@@ -63,13 +63,18 @@
 	if(health <= 0)
 		topple()
 
-/obj/structure/hadii_statue/bullet_act(var/obj/projectile/Proj)
+/obj/structure/hadii_statue/bullet_act(obj/projectile/hitting_projectile, def_zone, piercing_hit)
 	if(toppled)
-		return
-	if(!Proj)
-		return
-	if(!Proj.damage)
-		visible_message(SPAN_WARNING("\The [Proj] bounces off \the [src]!"))
-		return
-	visible_message(SPAN_WARNING("\The [Proj] hits \the [src]!"))
-	do_integrity_check(Proj.damage)
+		return BULLET_ACT_BLOCK
+	if(!hitting_projectile)
+		return BULLET_ACT_BLOCK
+	if(!hitting_projectile.damage)
+		visible_message(SPAN_WARNING("\The [hitting_projectile] bounces off \the [src]!"))
+		return BULLET_ACT_BLOCK
+
+	. = ..()
+	if(. != BULLET_ACT_HIT)
+		return .
+
+	visible_message(SPAN_WARNING("\The [hitting_projectile] hits \the [src]!"))
+	do_integrity_check(hitting_projectile.damage)

code/game/objects/structures/inflatable.dm

@@ -60,21 +60,28 @@
 	return ..()
 
 /obj/structure/inflatable/CanPass(atom/movable/mover, turf/target, height=0, air_group=0)
+	if(mover?.movement_type & PHASING)
+		return TRUE
+
 	if(isprojectile(mover))
 		visible_message(SPAN_DANGER("\The [src] rapidly deflates!"))
 		deflate(TRUE)
 		return TRUE
 	return FALSE
 
-/obj/structure/inflatable/bullet_act(var/obj/projectile/Proj)
-	var/proj_damage = Proj.get_structure_damage()
+/obj/structure/inflatable/bullet_act(obj/projectile/hitting_projectile, def_zone, piercing_hit)
+	var/proj_damage = hitting_projectile.get_structure_damage()
 	if(!proj_damage)
 		return
 
-	bullet_ping(Proj)
+	. = ..()
+	if(. != BULLET_ACT_HIT)
+		return .
+
+	bullet_ping(hitting_projectile)
 
 	health -= proj_damage
-	..()
+
 	if(health <= 0)
 		deflate(TRUE)
 	return
@@ -203,6 +210,8 @@
 /obj/structure/inflatable/door/CanPass(atom/movable/mover, turf/target, height=0, air_group=0)
 	if(air_group)
 		return state
+	if(mover?.movement_type & PHASING)
+		return TRUE
 	if(istype(mover, /obj/effect/beam))
 		return !opacity
 	if(isprojectile(mover))

code/game/objects/structures/janicart.dm

@@ -423,11 +423,14 @@
 		return
 
 /obj/structure/janitorialcart/CanPass(atom/movable/mover, turf/target, height=0, air_group=0)
-	if(air_group || (height==0)) return 1
+	if(air_group || (height==0))
+		return TRUE
+	if(mover?.movement_type & PHASING)
+		return TRUE
 	if(istype(mover) && mover.pass_flags & PASSTABLE)
-		return 1
+		return TRUE
 	if(istype(mover, /mob/living) && mover == pulling)
-		return 1
+		return TRUE
 	else
 		if(istype(mover, /obj/projectile))
 			return prob(30)

code/game/objects/structures/kitchen_spike.dm

@@ -67,6 +67,9 @@
 	if (!mover)
 		return 1
 
+	if(mover.movement_type & PHASING)
+		return TRUE
+
 	if(istype(mover,/obj/projectile) && density)
 		if (!occupied && prob(80))
 		//Wiry frame, usually wont be cover

code/game/objects/structures/mirror.dm

@@ -57,13 +57,16 @@
 		reflection.update_mirror_filters()
 
 
-/obj/structure/mirror/bullet_act(var/obj/projectile/Proj)
-	if(prob(Proj.get_structure_damage() * 2))
+/obj/structure/mirror/bullet_act(obj/projectile/hitting_projectile, def_zone, piercing_hit)
+	. = ..()
+	if(. != BULLET_ACT_HIT)
+		return .
+
+	if(prob(hitting_projectile.get_structure_damage() * 2))
 		if(!shattered)
 			shatter()
 		else
 			playsound(src, 'sound/effects/hit_on_shattered_glass.ogg', 70, 1)
-	..()
 
 /obj/structure/mirror/attackby(obj/item/attacking_item, mob/user)
 	if(shattered)

code/game/objects/structures/plasticflaps.dm

@@ -56,27 +56,30 @@
 		return AIR_BLOCKED
 	return FALSE
 
-/obj/structure/plasticflaps/CanPass(atom/A, turf/T)
-	if(istype(A) && A.pass_flags & PASSGLASS)
+/obj/structure/plasticflaps/CanPass(atom/movable/mover, turf/target)
+	if(istype(mover) && mover.pass_flags & PASSGLASS)
 		return prob(60)
 
-	var/obj/structure/bed/B = A
-	if (istype(A, /obj/structure/bed) && B.buckled)//if it's a bed/chair and someone is buckled, it will not pass
+	if(mover?.movement_type & PHASING)
+		return TRUE
+
+	var/obj/structure/bed/B = mover
+	if (istype(mover, /obj/structure/bed) && B.buckled)//if it's a bed/chair and someone is buckled, it will not pass
 		return 0
 
-	if(istype(A, /obj/vehicle))	//no vehicles
+	if(istype(mover, /obj/vehicle))	//no vehicles
 		return 0
 
 	//Bots can always pass
-	if(isbot(A))
+	if(isbot(mover))
 		return TRUE
 
-	var/mob/living/M = A
+	var/mob/living/M = mover
 	if(istype(M))
 		if(M.lying)
 			return ..()
 		for(var/mob_type in mobs_can_pass)
-			if(istype(A, mob_type))
+			if(istype(mover, mob_type))
 				return ..()
 		return issmall(M)
 

code/game/objects/structures/railing.dm

@@ -8,7 +8,7 @@
 	climbable = TRUE
 	layer = OBJ_LAYER
 	anchored = FALSE
-	pass_flags_self = LETPASSTHROW|PASSSTRUCTURE
+	pass_flags_self = LETPASSTHROW|PASSSTRUCTURE|PASSRAILING
 
 	atom_flags = ATOM_FLAG_CHECKS_BORDER
 	obj_flags = OBJ_FLAG_ROTATABLE|OBJ_FLAG_MOVES_UNSUPPORTED
@@ -88,6 +88,8 @@
 	. += FONT_SMALL(SPAN_NOTICE("\The [src] is <b>[anchored ? "" : "not"] screwed</b> to the floor."))
 
 /obj/structure/railing/CanPass(atom/movable/mover, turf/target, height=0, air_group=0)
+	if(mover?.movement_type & PHASING)
+		return TRUE
 	if(istype(mover,/obj/projectile))
 		return TRUE
 	if(!istype(mover) || mover.pass_flags & PASSRAILING)

code/game/objects/structures/simple_doors.dm

@@ -86,7 +86,10 @@
 	return
 
 /obj/structure/simple_door/CanPass(atom/movable/mover, turf/target, height=0, air_group=0)
-	if(air_group) return 0
+	if(air_group)
+		return FALSE
+	if(mover?.movement_type & PHASING)
+		return TRUE
 	if(istype(mover, /obj/effect/beam))
 		return !opacity
 	return !density
@@ -193,9 +196,13 @@
 		attack_hand(user)
 	return
 
-/obj/structure/simple_door/bullet_act(var/obj/projectile/Proj)
-	health -= Proj.damage
-	bullet_ping(Proj)
+/obj/structure/simple_door/bullet_act(obj/projectile/hitting_projectile, def_zone, piercing_hit)
+	. = ..()
+	if(. != BULLET_ACT_HIT)
+		return .
+
+	health -= hitting_projectile.damage
+	bullet_ping(hitting_projectile)
 	CheckHealth()
 
 /obj/structure/simple_door/proc/CheckHealth()

code/game/objects/structures/stool_bed_chair_nest/bed.dm

@@ -127,9 +127,6 @@
 	if(buckled)
 		buckled.forceMove(dest)
 
-/obj/structure/bed/CanPass(atom/movable/mover, turf/target, height=0, air_group=0)
-	return ..()
-
 /obj/structure/bed/ex_act(severity)
 	switch(severity)
 		if(1.0)

code/game/objects/structures/urban.dm

@@ -261,6 +261,8 @@ ABSTRACT_TYPE(/obj/structure/stairs/urban/road_ramp)
 	anchored = TRUE
 
 /obj/structure/rod_railing/CanPass(atom/movable/mover, turf/target, height=0, air_group=0)
+	if(mover?.movement_type & PHASING)
+		return TRUE
 	if(istype(mover,/obj/projectile))
 		return TRUE
 	if(!istype(mover) || mover.pass_flags & PASSRAILING)
@@ -313,6 +315,8 @@ ABSTRACT_TYPE(/obj/structure/stairs/urban/road_ramp)
 	icon_state = "guard_top_end"
 
 /obj/structure/road_barrier/CanPass(atom/movable/mover, turf/target, height=0, air_group=0)
+	if(mover?.movement_type & PHASING)
+		return TRUE
 	if(istype(mover,/obj/projectile))
 		return TRUE
 	if(!istype(mover) || mover.pass_flags & PASSRAILING)
@@ -343,6 +347,8 @@ ABSTRACT_TYPE(/obj/structure/stairs/urban/road_ramp)
 	can_be_unanchored = FALSE
 
 /obj/structure/chainlink_fence/CanPass(atom/movable/mover, turf/target, height=0, air_group=0)//So bullets will fly over and stuff.
+	if(mover?.movement_type & PHASING)
+		return TRUE
 	if(air_group || (height==0))
 		return TRUE
 	if(istype(mover, /obj/projectile))
@@ -378,6 +384,8 @@ ABSTRACT_TYPE(/obj/structure/stairs/urban/road_ramp)
 	can_be_unanchored = FALSE
 
 /obj/structure/rope_railing/CanPass(atom/movable/mover, turf/target, height=0, air_group=0)
+	if(mover?.movement_type & PHASING)
+		return TRUE
 	if(istype(mover,/obj/projectile))
 		return TRUE
 	if(!istype(mover) || mover.pass_flags & PASSRAILING)

code/game/objects/structures/windoor_assembly.dm

@@ -49,6 +49,8 @@
 	icon_state = "[facing]_[secure]windoor_assembly[state]"
 
 /obj/structure/windoor_assembly/CanPass(atom/movable/mover, turf/target, height=0, air_group=0)
+	if(mover?.movement_type & PHASING)
+		return TRUE
 	if(istype(mover) && mover.pass_flags & PASSGLASS)
 		return 1
 	if(get_dir(loc, target) == dir) //Make sure looking at appropriate border

code/game/objects/structures/window.dm

@@ -138,12 +138,15 @@
 	qdel(src)
 	return
 
-/obj/structure/window/bullet_act(var/obj/projectile/Proj)
-	var/proj_damage = Proj.get_structure_damage()
+/obj/structure/window/bullet_act(obj/projectile/hitting_projectile, def_zone, piercing_hit)
+	var/proj_damage = hitting_projectile.get_structure_damage()
 	if(!proj_damage)
-		return
+		return BULLET_ACT_BLOCK
+
+	. = ..()
+	if(. != BULLET_ACT_HIT)
+		return .
 
-	..()
 	take_damage(proj_damage)
 	return
 
@@ -167,6 +170,8 @@
 	return (dir == SOUTHWEST || dir == SOUTHEAST || dir == NORTHWEST || dir == NORTHEAST)
 
 /obj/structure/window/CanPass(atom/movable/mover, turf/target, height=0, air_group=0)
+	if(mover?.movement_type & PHASING)
+		return TRUE
 	if(istype(mover) && mover.pass_flags & PASSGLASS)
 		return 1
 	if(is_full_window())