trackrecorder.h

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/****************************************************************************
* VCGLib                                                            o o     *
* Visual and Computer Graphics Library                            o     o   *
*                                                                _   O  _   *
* Copyright(C) 2004                                                \/)\/    *
* Visual Computing Lab                                            /\/|      *
* ISTI - Italian National Research Council                           |      *
*                                                                    \      *
* All rights reserved.                                                      *
*                                                                           *
* 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 (http://www.gnu.org/licenses/gpl.txt)          *
* for more details.                                                         *
*                                                                           *
****************************************************************************/
/****************************************************************************
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$Log: not supported by cvs2svn $
Revision 1.1  2005/04/14 21:23:39  ganovelli
*** empty log message ***



****************************************************************************/
#ifndef VCGLIB_TRACKRECORDER
#define VCGLIB_TRACKRECORDER


#include <wrap/gui/trackball.h>
#include <stdio.h>
#include <time.h>

namespace vcg{
struct TrackRecorder{

        TrackRecorder(){Stop();}
        
        FILE * trackfile;
        
        enum { PLAY,REC,OFF } mode;
        int nextTime,   
                        startTime;  
 
        void StartPlaying(char * namefile){
                if(trackfile != NULL) return;

                trackfile = fopen(namefile,"rb");
                startTime = clock();
                mode = PLAY;
                fread(&nextTime,4,1,trackfile);
        } 

        void UpdateTrackball(Trackball & t){

                while( ( clock()-startTime > nextTime)&& !feof(trackfile)){
                                fread(&t.track,sizeof(float)*4 + sizeof(float)*5,1,trackfile);
                                fread(&nextTime,4,1,trackfile);
                }
                if(feof(trackfile))
                        Stop();
        }

        void  StartRecording(char * namefile){
                if(trackfile != NULL) return;
                trackfile = fopen(namefile,"wb");       
                startTime = clock();
                mode = REC;
        } 

        void  RecordTrackball(Trackball & t){
                nextTime = clock()-startTime;
                fwrite(&nextTime,4,1,trackfile);
                fwrite(&t.track,sizeof(float)*4 + sizeof(float)*5,1,trackfile);
        }

        void  Stop(){mode = OFF; trackfile = NULL;};

};
}
#endif