add projectile destruction and elevation

scripts/projectiles/projectile.gd

@@ -18,7 +18,6 @@ func _ready() -> void:
 	_life_timer = _lifetime
 	_debug_collision_shapes.init(get_children(), self, _collision_debug_material)
 	global_position = _start_position
-	global_position.y = HEIGHT
 	body_entered.connect(_on_body_entered)
 
 
@@ -42,7 +41,19 @@ func set_velocity(velocity: Vector3) -> void:
 
 
 func _on_body_entered(node: Node3D) -> void:
-	if node is not Player:
+	if node is Player:
+		queue_free()
 		return
 
-	queue_free()
+	print(node)
+	if node is CollisionObject3D:
+		var collision_node := node as CollisionObject3D
+		if collision_node.collision_layer & 1:
+			queue_free()
+			return
+
+	if node is CSGCombiner3D:
+		var collision_node := node as CSGCombiner3D
+		if collision_node.collision_layer & 1:
+			queue_free()
+			return