/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2005 Robert Osfield 
 *
 * This library is open source and may be redistributed and/or modified under  
 * the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or 
 * (at your option) any later version.  The full license is in LICENSE file
 * included with this distribution, and on the openscenegraph.org website.
 * 
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the 
 * OpenSceneGraph Public License for more details.
*/
//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);

        void setPause(bool pause) { _pause = pause; }

        /** implements the callback*/
        virtual void operator()(osg::Node* node, osg::NodeVisitor* nv);

    protected:
    
        float               _angular_velocity;
        osg::Vec3           _pivot;
        osg::Vec3           _axis;

        int                 _previousTraversalNumber;
        double              _previousTime;
        bool                _pause;

};

}

#endif