If your application runs but nothing is visible, check for the following common errors:
·Ensure that your triangles are not degenerate.
·Make sure that your index lists are internally consistentūthat you don't have entries like 1, 2, 2 (which are silently dropped).
·Ensure that your triangles are not being culled.
·Make sure that your transformations are internally consistent.
·Check the viewport to be sure it will allow your triangles to be seen.
·Check the description of the execute buffer.