title: In libgdx model-loader demo font.draw() is not putting "fps" text on screen
body: <p>I am starting to work with libgdx.
  I opened the example model-loader in trunk (<a href="http://code.google.com/p/libgdx/source/browse/trunk/extensions/model-loaders/model-loaders/src/com/badlogic/gdx/graphics/g3d/test/StillModelViewerGL20.java" rel="nofollow">StillModelViewerGL20.java</a>).  In the source I see this code in the <code>render</code> callback:</p>
  
  <pre><code>batch.begin();  
  font.draw(batch, "fps: " + Gdx.graphics.getFramesPerSecond(), 20, 30);    
  batch.end();
  </code></pre>
  
  <p>But I do not see any text on screen. Is there something I need to fix in this example to see text displayed?</p>