//C++ header 

#ifndef OSGUTIL_TRANSFORMCALLBACK
#define OSGUTIL_TRANSFORMCALLBACK 1

#include <osg/Node>
#include <osgUtil/Export>

namespace osgUtil
{

class OSGUTIL_EXPORT TransformCallback : public osg::NodeCallback
{

    public:

        TransformCallback(const osg::Vec3& pivot,const osg::Vec3& axis,float angularVelocity);

        virtual void operator() (osg::Node* node, osg::NodeVisitor* nv);
                
    protected:
    
        float               _angular_velocity;
        osg::Vec3           _pivot;
        osg::Vec3           _axis;

        int                 _previousTraversalNumber;
        double              _previousTime;

};

}

#endif