title: Texture offset in atlas to create an animated sprite with NGUI
body: <p>In Unity3d, I got a GameObject with the UISprite component from the NGUI plugin.
  So I need to use an atlas with textures, to set the texture for the UISprite.</p>
  
  <p>Now I want the UiSprite to be animated. The different frames are in a spritesheet within the atlas itself.</p>
  
  <p>I learned that you can animate something with a spritesheet by changing the offset.
  My questions is, how can I set the offset for the current texture and not for the entire atlas? So far, I can only change the offset for the entire atlas.</p>
  
  <p>Is there a possibility to het position of the textures from within the atlas or something and calculate the offset with that?</p>
  
  <p>I don't know how to proceed on this.
  Any insights are appreciated.</p>