Function get_milliseconds

tutorials/forest/forest.cpp:62–64

* returns the elapsed time in full milliseconds for a time stamp delta has * enough accuracy for a couple of seconds */

     * enough accuracy for a couple of seconds
     */
    uint32_t get_milliseconds(int64_t diff) {
      return uint32_t(((double)diff)/1000);
    }
  }

  struct Tutorial : public TutorialApplication