title: move obj in A-Frame using quaternion values
body: <p>I'm trying to move an object in a 3D space using A-Frame.</p>
  
  <p>I'm using the "Euler coordinates" (X, Y, Z) and I'm passing them to the object with the following code: </p>
  
  <pre><code>document.querySelector('a-entity[id=obj]').setAttribute('rotation', input.computed.z+ ' '+ -input.computed.x + ' ' + input.computed.y);
  </code></pre>
  
  <p>Everything is working fine.</p>
  
  <p>But now I'd like to implement the same thing but using the quaternions (QX, QY, QZ, QW).</p>
  
  <p>I have some problem in finding a good example or a simple documentation to start with.</p>
  
  <p>Does anyone have some suggestion on I can get the same result as the "Euler coordinates" but with the quaternions? </p>
  
  <p>Thanks!!</p>