private void setCalibratedZoomFactor(double d) {
   if (scene instanceof CalibratedScene) {
     CalibratedScene calibratedScene = (CalibratedScene) scene;
     calibratedScene.setCalibratedZoomFactor(d);
   } else {
     scene.setZoomFactor(d);
   }
 }
 private double getCalibratedZoomFactor() {
   if (scene instanceof CalibratedScene) {
     CalibratedScene calibratedScene = (CalibratedScene) scene;
     return calibratedScene.getCalibratedZoomFactor();
   } else {
     return scene.getZoomFactor();
   }
 }