code: function () {
          // Find the root node which transform needs update;
          var rootNodeIsDirty = this;
          while (rootNodeIsDirty && rootNodeIsDirty.getParent()
              && rootNodeIsDirty.getParent().transformNeedsUpdate()
          ) {
              rootNodeIsDirty = rootNodeIsDirty.getParent();
          }
          rootNodeIsDirty.update();
      }
docs: Update world transform before whole scene is updated.