Fixes #10258

Turrets now aim at the chest/groin unless the target has a neck grab on someone, otherwise they aim elsewhere.
Projectiles are now able to miss targets that are lying or buckled, except when the target is at point blank range and is the original target for the projectile.

code/game/machinery/portable_turret.dm

@@ -624,6 +624,14 @@ var/list/turret_icons
 	// Emagged turrets again use twice as much power due to higher firing rates
 	use_power(reqpower * (2 * (emagged || lethal)) * (2 * emagged))
 
+	//Turrets aim for the center of mass by default.
+	//If the target is grabbing someone then the turret smartly aims for extremities
+	var/obj/item/weapon/grab/G = locate() in target
+	if(G && G.state >= GRAB_NECK) //works because mobs are currently not allowed to upgrade to NECK if they are grabbing two people.
+		A.def_zone = pick("head", "l_hand", "r_hand", "l_foot", "r_foot", "l_arm", "r_arm", "l_leg", "r_leg")
+	else
+		A.def_zone = pick("chest", "groin")
+
 	//Shooting Code:
 	A.current = T
 	A.starting = T

code/game/machinery/turrets.dm

@@ -266,6 +266,15 @@
 	else
 		A = new /obj/item/projectile/energy/electrode( loc )
 		use_power(200)
+	
+	//Turrets aim for the center of mass by default.
+	//If the target is grabbing someone then the turret smartly aims for extremities
+	var/obj/item/weapon/grab/G = locate() in target
+	if(G && G.state >= GRAB_NECK) //works because mobs are currently not allowed to upgrade to NECK if they are grabbing two people.
+		A.def_zone = pick("head", "l_hand", "r_hand", "l_foot", "r_foot", "l_arm", "r_arm", "l_leg", "r_leg")
+	else
+		A.def_zone = pick("chest", "groin")
+	
 	A.current = T
 	A.starting = T
 	A.yo = U.y - T.y

code/modules/mob/mob_helpers.dm

@@ -264,11 +264,11 @@ var/list/global/organ_rel_size = list(
 /proc/get_zone_with_miss_chance(zone, var/mob/target, var/miss_chance_mod = 0, var/ranged_attack=0)
 	zone = check_zone(zone)
 
-	// you cannot miss if your target is prone or restrained
-	if(target.buckled || target.lying)
-		return zone
-	// if your target is being grabbed aggressively by someone you cannot miss either
 	if(!ranged_attack)
+		// you cannot miss if your target is prone or restrained
+		if(target.buckled || target.lying)
+			return zone
+		// if your target is being grabbed aggressively by someone you cannot miss either
 		for(var/obj/item/weapon/grab/G in target.grabbed_by)
 			if(G.state >= GRAB_AGGRESSIVE)
 				return zone

code/modules/projectiles/projectile.dm

@@ -165,7 +165,7 @@
 
 	//roll to-hit
 	miss_modifier = max(15*(distance-2) - round(15*accuracy) + miss_modifier, 0)
-	var/hit_zone = get_zone_with_miss_chance(def_zone, target_mob, miss_modifier, ranged_attack=(distance > 1))
+	var/hit_zone = get_zone_with_miss_chance(def_zone, target_mob, miss_modifier, ranged_attack=(distance > 1 || original != target_mob)) //if the projectile hits a target we weren't originally aiming at then retain the chance to miss
 	if(!hit_zone)
 		visible_message("<span class='notice'>\The [src] misses [target_mob] narrowly!</span>")
 		return 0