Ports move force and move resist, movement/pushing/pulling tweaks & co.

code/game/objects/obj_defense.dm

@@ -46,7 +46,7 @@
 		if(BURN)
 			playsound(src.loc, 'sound/items/welder.ogg', 100, 1)
 
-/obj/hitby(atom/movable/AM)
+/obj/hitby(atom/movable/AM, skipcatch, hitpush, blocked, datum/thrownthing/throwingdatum)
 	..()
 	var/throwdamage = AM.throwforce
 	if(isobj(AM))
@@ -126,6 +126,17 @@
 		if(. && !play_soundeffect)
 			playsound(src, 'sound/effects/meteorimpact.ogg', 100, 1)
 
+/obj/force_pushed(atom/movable/pusher, force = MOVE_FORCE_DEFAULT, direction)
+	return TRUE
+
+/obj/move_crushed(atom/movable/pusher, force = MOVE_FORCE_DEFAULT, direction)
+	collision_damage(pusher, force, direction)
+	return TRUE
+
+/obj/proc/collision_damage(atom/movable/pusher, force = MOVE_FORCE_DEFAULT, direction)
+	var/amt = max(0, ((force - (move_resist * MOVE_FORCE_CRUSH_RATIO)) / (move_resist * MOVE_FORCE_CRUSH_RATIO)) * 10)
+	take_damage(amt, BRUTE)
+
 /obj/attack_slime(mob/living/simple_animal/slime/user)
 	if(!user.is_adult)
 		return