virtual bool get_absolute_tracking() const { return false; }
virtual HeadTrackingCamera *create_camera(const GL::Camera &) = 0;
virtual StereoCombiner *create_combiner(GL::View &) = 0;
virtual bool get_absolute_tracking() const { return false; }
virtual HeadTrackingCamera *create_camera(const GL::Camera &) = 0;
virtual StereoCombiner *create_combiner(GL::View &) = 0;