fix fbx hierarchy issue

src/osgPlugins/fbx/WriterNodeVisitor.cpp

@@ -652,10 +652,10 @@ void WriterNodeVisitor::apply(osg::Geometry& geometry)
     // retrieved from the geometry.
 
     // create fbx node to contain the single geometry
-    FbxNode* parent = _curFbxNode;
-    FbxNode* nodeFBX = FbxNode::Create(_pSdkManager, geometry.getName().empty() ? "Geometry" : geometry.getName().c_str());
-    _curFbxNode->AddChild(nodeFBX);
-    _curFbxNode = nodeFBX;
+    //FbxNode* parent = _curFbxNode;
+    //FbxNode* nodeFBX = FbxNode::Create(_pSdkManager, geometry.getName().empty() ? "Geometry" : geometry.getName().c_str());
+    //_curFbxNode->AddChild(nodeFBX);
+    //_curFbxNode = nodeFBX;
 
     _geometryList.push_back(&geometry);
 
@@ -669,23 +669,33 @@ void WriterNodeVisitor::apply(osg::Geometry& geometry)
         buildFaces(geometry.getName(), _geometryList, _listTriangles, _texcoords);
 
     // return to parent fbx node
-    _curFbxNode = parent;
+    //_curFbxNode = parent;
 }
 
 void WriterNodeVisitor::apply(osg::Group& node)
 {
-    FbxNode* parent = _curFbxNode;
+	if (_firstNodeProcessed)
+	{
+		FbxNode* parent = _curFbxNode;
 
-    FbxNode* nodeFBX = FbxNode::Create(_pSdkManager, node.getName().empty() ? "DefaultName" : node.getName().c_str());
-    _curFbxNode->AddChild(nodeFBX);
-    _curFbxNode = nodeFBX;
+		FbxNode* nodeFBX = FbxNode::Create(_pSdkManager, node.getName().empty() ? "DefaultName" : node.getName().c_str());
+		_curFbxNode->AddChild(nodeFBX);
+		_curFbxNode = nodeFBX;
 
-    traverse(node);
+		traverse(node);
 
-    if (_listTriangles.size() > 0)
-        buildFaces(node.getName(), _geometryList, _listTriangles, _texcoords);
+		if (_listTriangles.size() > 0)
+			buildFaces(node.getName(), _geometryList, _listTriangles, _texcoords);
 
-    _curFbxNode = parent;
+		_curFbxNode = parent;
+	}
+	else
+	{
+		_firstNodeProcessed = true;
+		traverse(node);
+
+		
+	}
 }
 
 void WriterNodeVisitor::apply(osg::MatrixTransform& node)

src/osgPlugins/fbx/WriterNodeVisitor.h

@@ -86,7 +86,8 @@ class WriterNodeVisitor: public osg::NodeVisitor
             _options(options),
             _externalWriter(srcDirectory, osgDB::getFilePath(fileName), true, 0),
             _texcoords(false),
-            _drawableNum(0)
+            _drawableNum(0),
+			_firstNodeProcessed(false)
         {}
 
         virtual void apply(osg::Geometry& node);
@@ -234,6 +235,9 @@ class WriterNodeVisitor: public osg::NodeVisitor
         ///Tell us if the last apply succeed, useful to stop going through the graph.
         bool _succeedLastApply;
 
+		///Marks if the first node is processed.
+		bool _firstNodeProcessed;
+		
         ///The current directory.
         std::string _directory;