   Interleaved Index Buffer
  HiI'm trying to load mesh from collada files. Each element buffer is a big bunch of data (<source> tags). Index can be found via the <vertices> tag, and triangles can be found via the <triangles> tag (more infos here). Here's a small example :<triangles count="12" material="Material"><input offset="0" semantic="VERTEX" source="#Cube_002-Vertex"/><input offset="1" semantic="NORMAL" source="#Cube_002-Normals"/><p>0 0 1 0 2 0 2 0 3 0 0 0 4 1 7 1 6 1 6 1 5 1 4 1 0 2 4 2 5 2 5 2 1 2 0 2 1 3 5 3 6 3 6 3 2 3 1 3 2 4 6 4 7 4 7 4 3 4 2 4 4 5 0 5 3 5 3 5 7 5 4 5</p></triangles>This means that the index buffer is interleaved (1 indice for the position and 1 indice for the normal). I can't find the right OpenGL command to process this kind of interleaved index buffer. Any help is welcome.   
  GL only supports one index buffer, which indexs all vertex attributes. You need to preprocess the data and provide it in the expected format to GL.   ;  Ok, thanks !   