many exports to scriptengine

engine/SceneGraph.cpp

@@ -5,7 +5,7 @@ namespace BlueCore
 
 SceneGraph::SceneGraph()
 {
-	_RootNode = new SceneNode();
+	_RootNode = new SceneNode("root node");
 }
 SceneGraph::~SceneGraph()
 {
@@ -22,6 +22,11 @@ void SceneGraph::setCamera(Camera *camera)
 	_Camera = camera;
 }
 
+Camera*  SceneGraph::getCamera()const
+{
+	return _Camera.pointer();
+}
+
 void SceneGraph::update(Scalar time)
 {
 	_RootNode->update (time);