extends Control

var offset_pos = Vector2(32, 32)

onready var render_target = get_node("Viewport")
onready var tex_frame = get_node("TextureFrame")

var entities = Array()

func _ready():
	set_fixed_process(true)
	tex_frame.set_texture(render_target.get_render_target_texture())
	render_target.init(entities)
	set_pos(Vector2(32, 32))

func register_entity(e):
	entities.append(weakref(e))
	render_target.init(entities)

func collect_entities():
	var to_remove
	for i in range(0, entities.size()):
		if not entities[i].get_ref():
			if to_remove == null:
				to_remove = Array()
			to_remove.push_back(i)
	
func _fixed_process(delta):
	collect_entities()
	
func _get_camera_center():
	var vtrans = get_canvas_transform()
	var top_left = -vtrans.get_origin() / vtrans.get_scale()
	var vsize = get_viewport_rect().size
	return top_left + 0.5*vsize/vtrans.get_scale()

func _draw():
	if entities.size() > 0:
		render_target.render_target_clear()
		render_target.it_changed(_get_camera_center())
		# gc the shit out of em
		collect_entities()