From Michael Gronager, addition of NodeCallback support in .osg format.

VisualStudio/osgPlugins/osg/dot_osg.dsp

@@ -232,6 +232,10 @@ SOURCE=..\..\..\src\osgPlugins\osg\Node.cpp
 # End Source File
 # Begin Source File
 
+SOURCE=..\..\..\src\osgPlugins\osg\NodeCallback.cpp
+# End Source File
+# Begin Source File
+
 SOURCE=..\..\..\src\osgPlugins\osg\Object.cpp
 # End Source File
 # Begin Source File

src/osgPlugins/osg/GNUmakefile

@@ -35,6 +35,7 @@ CXXFILES =\
         Matrix.cpp\
         MatrixTransform.cpp\
         Node.cpp\
+        NodeCallback.cpp\
         Object.cpp\
         OccluderNode.cpp\
         PagedLOD.cpp\

src/osgPlugins/osg/NodeCallback.cpp

@@ -0,0 +1,56 @@
+#include <osg/Notify>
+
+#include <osg/NodeCallback>
+
+#include <osgDB/Registry>
+#include <osgDB/Input>
+#include <osgDB/Output>
+
+using namespace osg;
+using namespace osgDB;
+
+bool  NodeCallback_readLocalData(osg::Object &obj, osgDB::Input &fr);
+bool  NodeCallback_writeLocalData(const osg::Object &obj, osgDB::Output &fw); // register the read and write functions with the osgDB::Registry.
+
+osgDB::RegisterDotOsgWrapperProxy  NodeCallback_Proxy
+(
+    new NodeCallback,
+    "NodeCallback",
+    "Object NodeCallback",
+    &NodeCallback_readLocalData,
+    &NodeCallback_writeLocalData
+);
+
+bool NodeCallback_readLocalData(osg::Object &obj, osgDB::Input &fr)
+{
+    NodeCallback& nc = dynamic_cast<NodeCallback&>(obj);
+    if (!(&nc)) return false;
+
+    bool itrAdvanced = false;
+
+    static osg::ref_ptr<NodeCallback> s_nc = new NodeCallback;
+    osg::ref_ptr<osg::Object> object = fr.readObjectOfType(*s_nc);
+    if (object.valid())
+    {
+        NodeCallback* ncc = dynamic_cast<NodeCallback*>(object.get());
+        if (ncc) nc.setNestedCallback(ncc);
+        itrAdvanced = true;
+    }
+
+    return itrAdvanced;
+}
+
+bool NodeCallback_writeLocalData(const osg::Object &obj, osgDB::Output &fw)
+{
+    const NodeCallback* nc = dynamic_cast<const NodeCallback*>(&obj);
+    if (!nc) return false;
+
+    NodeCallback* nnc = (NodeCallback*) nc;
+
+    if (nnc->getNestedCallback())
+    {
+        fw.writeObject(*(nnc->getNestedCallback()));
+    }
+
+    return true;
+}