   How do I define glviewport for an isometric view?
  Hello.  I am trying to set up an isometric view in Opengl.  I use glortho projection and rotate the camera by 45 degress on X and Y axis.// Setup   glMatrixMode(GL_PROJECTION); glOrthof(0, backingWidth, 0,backingHeight, 0, 1000);glViewport(0, 0, backingWidth, backingHeight);// Draw viewglMatrixMode(GL_MODELVIEW); glLoadIdentity();glRotatef(35.264f, 1.0f, 0.0f, 0.0f);glRotatef(45.0f, 0.0f, 1.0f, 0.0f);This sets up the isometric view but there is an invisible diagonal clipping plane going through the center of the screen. From what I can tell this is the boundary of the viewport after the rotation.It goes straight through the middle of the screen and I cant display anything outside of the boundary.Does anyone know what I need to do to get this working?  I've diagnosed this for a while now and I suspect that the viewport clipping plane needs to be rotated or modified to the new camera orientation.But how do I do this???   
  I just answered my own questionI have no idea why but changing the znear zfar of glortho did it.glOrthof(0, backingWidth, 0,backingHeight, -500, 500);phew!   