Pirate-Jam-16/Godot/Magnet/magnet.gd

extends CharacterBody2D

const MAGNET_FORCE: int = 1000

func _ready():
	add_to_group("magnets")
	max_slides = 1

func _physics_process(delta):
	var acceleration: Vector2 = Vector2.ZERO
	
	#calc acceleration to other magnets
	for iter in get_tree().get_nodes_in_group("magnets"):
		if iter == self:
			continue
		
		var dir: Vector2 = (iter.position - position).normalized()
		var dist: float = (iter.position - position).length()
		
		acceleration += dir * (MAGNET_FORCE / dist)
	
	#if moving, rotate to face that direction
	if velocity >= Vector2.ONE:
		var dest: float = acceleration.angle() + TAU/4
		var change: float = dest - rotation
		
		#rotate faster when closer to 0
		rotate(change)
	
	#apply to velocity
	velocity += acceleration * delta
	
	#move and stop on collision
	var collided: bool = move_and_slide()
	if collided:
		velocity = Vector2.ZERO