How to make my player move in facing direction

Question

How do you make my player move in it's facing direction?
For example, My player would rotate to the right and once I press a certain key, It should move forward or backward on where it's facing instead of moving up or down the y axis.

Help would be appreciated. Thank you.

Answer 1

You can use the transform for this. I'm assuming you're in 2D, but the principle is the same in 3D.

In 2D transform.x is the object's local forward axis. So to always move forward regardless of rotation, you could do this for example:

func _process(delta):
    if Input.is_action_pressed("forward"):
        position += transform.x * speed * delta