text: HC.plugins.camera_mode = HC.plugins.camera_mode || {};
  {
      HC.CameraModePlugin = class Plugin extends HC.AnimationPlugin {
          before() {
              let layer = this.layer;
              layer.centerCamera();
              layer.updateCameraFov();
          }
  
          after() {
              let layer = this.layer;
              layer.getCamera().updateProjectionMatrix();
          }
      }
  }