    /*
     * $example: Construct an integrator using the default implementations.
     */

    this.integrator =
      JCameraFPSStyleIntegrator.newIntegrator(this.camera, this.input);

    /*
     * Work out what fraction of a second the given simulation rate is going
     * to require.
     */

    final float rate = 60.0f;
    this.integrator_time_seconds = 1.0f / rate;

