--- a/Renderer/Engine/viewer.h	Thu Oct 22 19:31:09 2009 +0900
+++ b/Renderer/Engine/viewer.h	Thu Oct 22 22:22:31 2009 +0900
@@ -10,6 +10,8 @@
 #include "Application.h"
 #include "SceneGraphRoot.h"
 
+class SceneGraphRoot;
+
 class Application;
 
 class Viewer : public MainLoop {
@@ -82,6 +84,16 @@
 	return sgroot->createSceneGraph(id);
     }
 
+    SceneGraph * createSceneGraph(const char *id)
+    {
+	return sgroot->createSceneGraph(id);
+    }
+
+    int getSgid(const char *id)
+    {
+	return sgroot->getSgid(id);
+    }
+
     SceneGraph * createSceneGraph()
     {
 	return sgroot->createSceneGraph();