oneWayCollisionRayCast2D.gd

extends RayCast2D

# If this is use to disable collisions
export(bool) var disable_collisions = false;
# What to set/remove collisions against
export(NodePath) var physics_path

var physics_object

func _ready():

	print( "Physics object: "+ str(physics_path))
	physics_object = get_node(physics_path)
	add_exception(physics_object)
	set_exclude_parent_body(true)
	set_physics_process(true)

func setDisableCollisions(_disable):
	disable_collisions = _disable

func _physics_process(delta):
	if physics_object != null:
		set_position(physics_object.get_position())
		
		var collision_obj_to_add_back = []
		while is_colliding():
			var col = get_collider()
			if col == null:
				continue
			#print("Ray with: "+ col.get_class())
			if col != null && col is PhysicsBody2D : 
				#print("Setting collision: "+ str(disable_collisions) + " " + str(get_name()) +" "+ str(physics_object.get_name()))
				col.propagate_call("setOneWayCollision", [disable_collisions, physics_object], true)
			if !(col is Area2D):
				collision_obj_to_add_back.append(col)
			add_exception(col)
			force_raycast_update()
		
		for col in collision_obj_to_add_back:
			remove_exception(col)