extends Node2D

@export var center = Vector2.ZERO
var angle = 0

# Quick access to relative cardinal directions
var up : Vector2 :
	get():
		return global_from_local(Vector2.UP)
var down : Vector2 :
	get():
		return global_from_local(Vector2.DOWN)
var right : Vector2 :
	get():
		return global_from_local(Vector2.RIGHT)
var left : Vector2 :
	get():
		return global_from_local(Vector2.LEFT)

func _enter_grid() -> void:
	align()

func _process(_delta: float) -> void:
	align()

# Aligns the parent to the center
func align():
	angle = -(get_parent().position - center).angle_to(Vector2.UP)
	get_parent().rotation = angle;

# Converts directions in local coordinates into global coordinates
func global_from_local (_velocity: Vector2) -> Vector2:
	return _velocity.rotated(angle)

# Converts directions in global coordinates into local coordinates
func local_from_global (_velocity: Vector2) -> Vector2:
	return _velocity.rotated(-angle)