title: Godot 3d get Forward Vector
body: <p>I was wondering if there was a way to get the forward vector of a spatial node in godot 3d.</p>
  
  <p>In unity this would simply be transform.forward.</p>
  
  <p>Godot gives me a rotational vector but im not sure how to convert this to a directional vector.</p>
  
  <p>What is godot's version of transform.forward?</p>