protected double getHeadTranslationScale(IDelegateView view) {
   Position eyePosition = view.getEyePosition();
   DrawContext dc = view.getDC();
   if (dc == null) {
     return Math.abs(eyePosition.elevation);
   }
   double altitude = ViewUtil.computeElevationAboveSurface(dc, eyePosition);
   return Math.abs(altitude);
 }