title: Cannot get 3D model with texture to display correct
body: <p>I "trying" to learn OpenGL using the book "Learning OpenGL ES for iOS: A Hands-on Guide to Modern 3D Graphics Programming by Erik M. Buck"</p>
  
  <p>I have got to the stage where I am trying to load a 3D model in a tester app to confirm my knowledge and although I can get the model displayed it appears reversed and the texture seems part displayed (or displayed incorrectly).</p>
  
  <p>I have tried GL_BLEND, GL_DEPTH_TEST, using ortho not using ortho to no avail and realise I'm probably missing something integral..thinking it might be something to do with face normals?</p>
  
  <p>here is what should appear:</p>
  
  <p><img src="https://i.stack.imgur.com/UwH0a.jpg" alt="enter image description here"></p>
  
  <p>and this is what I get:</p>
  
  <p><img src="https://i.stack.imgur.com/qwgfA.jpg" alt="enter image description here">
  can anyone help?</p>
  
  <p>Thanks</p>