docs: public void onDrawFrame(float frameTime)
      {
          if (isEnabled() && (mScene != null) && mPickEventLock.tryLock())
          {
              // Don't call if we are in the middle of processing another pick
              try
              {
                  doPick();
              }
              finally
              {
                  mPickEventLock.unlock();
              }
          }
      }