title: Moving the camera in the direction it's facing, with ThreeJS
body: <p>Say I have a camera placed at:</p>
  
  <pre><code>{
    x: 10,
    y: 30,
    z: 20
  }
  </code></pre>
  
  <p>It's rotation is:</p>
  
  <pre><code>{
    x: 0.1,
    y: 0.2,
    z: 0.3
  }
  </code></pre>
  
  <p>I want to move the camera 1 unit from it's current position in the direction it's facing.</p>
  
  <p>How do I do calculate the cameras new position?</p>
  
  <p>I'm using ThreeJS.</p>