/*  -*-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_ANIMATION_MANAGER_BASE_H
#define OSGANIMATION_ANIMATION_MANAGER_BASE_H

#include <osgAnimation/Animation>
#include <osgAnimation/Export>
#include <osg/FrameStamp>
#include <osg/Group>



namespace osgAnimation
{
    class OSGANIMATION_EXPORT AnimationManagerBase : public osg::NodeCallback
    {
    public:
        typedef std::set<osg::ref_ptr<Target> > TargetSet;

        AnimationManagerBase();
        AnimationManagerBase(const AnimationManagerBase& b, const osg::CopyOp& copyop= osg::CopyOp::SHALLOW_COPY);
        virtual ~AnimationManagerBase();
        virtual void buildTargetReference();
        virtual void registerAnimation (Animation* animation);
        virtual void link(osg::Node* subgraph);
        virtual void update(double t) = 0;
        virtual bool needToLink() const;
        const AnimationList& getAnimationList() const { return _animations;}

        /** Callback method called by the NodeVisitor when visiting a node.*/
        virtual void operator()(osg::Node* node, osg::NodeVisitor* nv);

        /// Operation that must be done each frame
        void clearTargets();
        void normalizeTargets();


    protected:

        AnimationList _animations;
        TargetSet _targets;
        bool _needToLink;
    };
}
#endif
