I know my geometry is inside the view volume. How can I turn off OpenGLs view-volume clipping to maximize performance?
Standard OpenGL doesn’t provide a mechanism to disable the view-volume clipping test; thus, it will occur for every primitive you send. Some implementations of OpenGL support the GL_EXT_clip_volume_hint extension. If the extension is available, a call to glHint(GL_CLIP_VOLUME_CLIPPING_HINT_EXT,GL_FASTEST) will inform OpenGL that the geometry is entirely within the view volume and that view-volume clipping is unnecessary. Normal clipping can be resumed by setting this hint to GL_DONT_CARE. When clipping is disabled with this hint, results are undefined if geometry actually falls outside the view volume.
