title: Scale object fit to the screen in open gl es 2.0 on iOS
body: <p>I am working with open gl es 2.0 on iOS. I want to set the object to fit to screen when rendered initially.</p>
  
  <p>I have this code:</p>
  
  <pre><code>CATransform3D currentCalculatedMatrix = CATransform3DIdentity;
  currentCalculatedMatrix = CATransform3DScale(currentCalculatedMatrix,scaleFactor, scaleFactor,scaleFactor);
  </code></pre>
  
  <p>How should I calculate and set the scale factor?</p>