Smoothly look_at in 2D for Godot

smooth_look_at.gd

extends Node2D

# These helper functions smoothly look at any object in 2D space.
# To avoid wrong rotations over +180 degrees, lerp_angle is used.
# Everything happens in global space, so the rotations should be applied properly.

func _process(delta):
	$icon.global_rotation = look_at_position($icon, get_global_mouse_position(), 5.0 * delta)

func look_at_position(source: Node2D, target: Vector2, delta: float):
	var direction = target - source.global_position
	return lerp_angle(source.global_rotation, direction.angle(), delta)

func look_at_node(source: Node2D, target: Node2D, delta: float):
	var direction = target.global_position - source.global_position
	return lerp_angle(source.global_rotation, direction.angle(), delta)