message: call Canvas3D scene animating by animation manager
diff: @@ -89,6 +89,7 @@ class PluginAnimationManager extends PluginComponent<PluginAnimationManager.Stat
  }
  start() {
  + this.context.canvas3d.setSceneAnimating(true);
  this.updateState({ animationState: 'playing' });
  this.triggerUpdate();
  @@ -100,6 +101,7 @@ class PluginAnimationManager extends PluginComponent<PluginAnimationManager.Stat
  }
  stop() {
  + this.context.canvas3d.setSceneAnimating(false);
  if (typeof this._frame !== 'undefined') cancelAnimationFrame(this._frame);
  this.updateState({ animationState: 'stopped' });
  this.triggerUpdate();
  