example update.

example/Gizmo/StaticMesh.h

@@ -2,6 +2,8 @@
 
 #include<hgl/graph/VKRenderable.h>
 #include<hgl/type/SortedSets.h>
+#include<hgl/graph/SceneNode.h>
+
 VK_NAMESPACE_BEGIN
 
 class StaticMesh
@@ -12,6 +14,10 @@ class StaticMesh
     SortedSets<MaterialInstance *> mi_set;
     SortedSets<Pipeline *> pipeline_set;
 
+protected:
+
+    SceneNode *root_node
+
 public: