Function g3_RefreshTransforms

renderer/HardwareTransforms.cpp:91–114

void g3_ForceTransformRefresh(void) { sUseTransformPassthru = -1; }

void g3_RefreshTransforms(bool usePassthru) {
  if (sUseTransformPassthru == 1 && usePassthru) {
    // we don't have to do anything because we are already setup for pass-thru
    return;
  }

  if (usePassthru) {
    // setup OpenGL to use pass-thru
    rend_TransformSetToPassthru();
  } else {
    // extract the viewport data from the renderer
    int viewportWidth, viewportHeight, viewportX, viewportY;
    rend_GetProjectionScreenParameters(viewportX, viewportY, viewportWidth, viewportHeight);

    // setup OpenGL to use full transform stack
    // TODO: in the future we only need to set those that have changed
    rend_TransformSetViewport(viewportX, viewportY, viewportWidth, viewportHeight);
    rend_TransformSetProjection(gTransformProjection);
    rend_TransformSetModelView(gTransformModelView);
  }

  // store the pass-thru
  sUseTransformPassthru = (usePassthru) ? 1 : 0;
}