/*  -*-c++-*- 
 *  Copyright (C) 2008 Cedric Pinson <mornifle@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_NODE_VISITOR_H
#define OSGANIMATION_NODE_VISITOR_H

#include <osg/NodeVisitor>
#include <osgAnimation/Animation>
#include <osgAnimation/UpdateCallback>

namespace osgAnimation 
{

    struct LinkVisitor : public osg::NodeVisitor
    {
        AnimationList _animations;
        unsigned int _nbLinkedTarget;
        
        LinkVisitor(Animation* animation) : osg::NodeVisitor(osg::NodeVisitor::TRAVERSE_ALL_CHILDREN) { _animations.push_back(animation); _nbLinkedTarget = 0;}
        LinkVisitor(const AnimationList& animations) : osg::NodeVisitor(osg::NodeVisitor::TRAVERSE_ALL_CHILDREN) { _animations = animations; _nbLinkedTarget = 0;}

        META_NodeVisitor("osgAnimation","LinkVisitor")

        void apply(osg::Node& node)
        {
            osgAnimation::AnimationUpdateCallback* cb = dynamic_cast<osgAnimation::AnimationUpdateCallback*>(node.getUpdateCallback());
            if (cb) 
            {
                int result = 0;
                for (int i = 0; i < (int)_animations.size(); i++)
                {
                    result += cb->link(_animations[i].get());
                    _nbLinkedTarget += result;
                }
                std::cout << "LinkVisitor links " << result << " for \"" << cb->getName() << '"' << std::endl;
            }
            traverse(node);
        }
    };

}

#endif