/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2006 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.
*/

#ifndef OSGUTIL_REVERSEPRIMITIVEFUNCTOR
#define OSGUTIL_REVERSEPRIMITIVEFUNCTOR 1

#include <osg/PrimitiveSet>
#include <osg/Notify>
#include <osgUtil/Export>

namespace osgUtil {


class OSGUTIL_EXPORT ReversePrimitiveFunctor : public osg::PrimitiveIndexFunctor
{
    public:

        virtual ~ReversePrimitiveFunctor() {}

        osg::PrimitiveSet * getReversedPrimitiveSet() { return _reversedPrimitiveSet.get(); }

        virtual void setVertexArray(unsigned int , const osg::Vec2* ) {}
        virtual void setVertexArray(unsigned int , const osg::Vec3* ) {}
        virtual void setVertexArray(unsigned int , const osg::Vec4* ) {}
        virtual void setVertexArray(unsigned int , const osg::Vec2d* ) {}
        virtual void setVertexArray(unsigned int , const osg::Vec3d* ) {}
        virtual void setVertexArray(unsigned int , const osg::Vec4d* ) {}

        virtual void drawArrays(GLenum mode,GLint first,GLsizei count);
        virtual void drawElements(GLenum mode,GLsizei count, const GLubyte* indices);
        virtual void drawElements(GLenum mode,GLsizei count, const GLushort* indices);
        virtual void drawElements(GLenum mode,GLsizei count, const GLuint* indices);


        /// Mimics the OpenGL \c glBegin() function.
        virtual void begin(GLenum mode);
        virtual void vertex(unsigned int /*pos*/);
        virtual void end();


        osg::ref_ptr<osg::PrimitiveSet> _reversedPrimitiveSet;

    private:

        bool _running;
};

} // end osgUtil namespace

#endif // ** OSGUTIL_REVERSEFACEVISITOR ** //
