/*  -*-c++-*- 
 *  Copyright (C) 2009 Cedric Pinson <cedric.pinson@plopbyte.net>
 *
 * 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 OSGANIMATION_UPDATE_MATERIAL
#define OSGANIMATION_UPDATE_MATERIAL 1

#include <osgAnimation/AnimationUpdateCallback>
#include <osgAnimation/Export>
#include <osg/StateAttribute>
#include <osg/Material>

namespace osgAnimation
{

    class OSGANIMATION_EXPORT UpdateMaterial : public AnimationUpdateCallback<osg::StateAttributeCallback>
    {
    protected:
        osg::ref_ptr<Vec4Target> _diffuse;
    
    public:

        META_Object(osgAnimation, UpdateMaterial);

        UpdateMaterial(const std::string& name = "");
        UpdateMaterial(const UpdateMaterial& apc,const osg::CopyOp& copyop);

        /** Callback method called by the NodeVisitor when visiting a node.*/
        virtual void operator () (osg::StateAttribute*, osg::NodeVisitor*);
        void update(osg::Material& material);
        bool link(Channel* channel);
        Vec4Target* getDiffuse();
    };
}

#endif
