motionblurcallback.h

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/***************************************************************************
 *  callback class for motion blur                                         *
 *  the param globalData.odeConfig.motionPersistence determines            *
 *  the level of motion blur                                               *
 *                                                                         *
 ***************************************************************************/
/***************************************************************************
 *   Copyright (C) 2005-2011 LpzRobots development team                    *
 *    Georg Martius  <georg dot martius at web dot de>                     *
 *    Frank Guettler <guettler at informatik dot uni-leipzig dot de        *
 *    Frank Hesse    <frank at nld dot ds dot mpg dot de>                  *
 *    Ralf Der       <ralfder at mis dot mpg dot de>                       *
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 *   This program 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         *
 *   GNU General Public License for more details.                          *
 *                                                                         *
 *   You should have received a copy of the GNU General Public License     *
 *   along with this program; if not, write to the                         *
 *   Free Software Foundation, Inc.,                                       *
 *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
 *                                                                         *
 ***************************************************************************/
#ifndef __MOTIONBLURCALLBACK_H
#define __MOTIONBLURCALLBACK_H

#include <osgProducer/OsgSceneHandler>
#include "globaldata.h"

namespace lpzrobots {

  /** a class that enables motion blur for the scenegraph 
   *  should be called in the main simulation loop
   */
  class MotionBlurDrawCallback: public osgProducer::OsgSceneHandler::Callback
    {
    public:
      /** globalData.odeConfig.motionPersistence - determines the level of motion blur,
       *  between 0.0 and 1.0, for example:
       *  heavy motion blur is set by globalData.odeConfig.motionPersistance=0.25
       *  light motuib blur is set by globalData.odeConfig.motionPersistence=0.1
       */ 
      MotionBlurDrawCallback(GlobalData& global);
      
      virtual void operator()(osgProducer::OsgSceneHandler &handler, Producer::Camera &camera);

    private:
      bool cleared_;
      double t0_;
      double persistence_;
      GlobalData& globalData; // the global environment variables
    };
  
}

#endif