class_name ConveyorModel
extends Node3D

var alpha: float = 0.

@onready var mat: ShaderMaterial = $ConveyorDirection.get_active_material(0)

func _process(delta):
	alpha = Global.interpolate(alpha, 0., delta)
	mat.set_shader_parameter("alpha_fac", alpha)

func to_direction(direction: Vector2):
	direction.y *= -1
	$ConveyorDirection.rotation.y = direction.angle() + .5 * PI
	alpha = 1.