title: Is there an tutorial on loading an 3D model in openGL ES on the iPhone?
body: <p>I've started to play around with some 3d modelers a while ago. Now I'm curious: How can I bring such an 3D model to the iPhone or iPad, so that I can see it on screen and maybe even rotate it with gestures?</p>
  
  <p>1) What's the best file format for the 3D models?</p>
  
  <p>2) How would I load a particular 3D model file into openGL ES and then render it?</p>
  
  <p>3) How would I apply an material to the polys, i.e. to make the model appear red?</p>
  
  <p>4) Does the model have some sort of center or pivot point where I can rotate it easily around? Or do I need incredible freakin' math skills to transform all the vertecies in 3D space myself? How hard is it to rotate something?</p>
  
  <p>5) Can I scale models or fit them into the camera viewport? How hard is that to do? Freakin' awesome math skills needed?</p>
  
  <p>5) Does openGL ES support some kind of shader tree model with gradients and effects that can be applied to the model or material?</p>
  
  <p>Would be so happy if someone can point out an quick starting guide for people who know 3D, but don't know OpenGL ES. Maybe someone already made a great tutorial on this topic?</p>