/cygdrive/d/src/svn/vrut/trunk/core/src/framerate.h

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/*
 * $Id: framerate.h 409 2008-10-20 19:01:03Z kybav1 $
 *
 * Description  : One line description of file.
 * Author       : Vaclav Kyba <mail/Jabber: vaseo1@gmail.com>  <ICQ: 98576293>
 * 
 * Purpose      :
 *     Long description of what the file is for.
 */


#ifndef __FRAMERATE__H__
#define __FRAMERATE__H__

#include <wx/stopwatch.h>


namespace VRUT
{
       class FrameRate
       {
       protected:
              unsigned long totalFrames;
              unsigned long lastFrames;
              float fps;
              wxStopWatch stopWatch;

       public:
              FrameRate()
              {
                     totalFrames = lastFrames = 0;
                     fps = 0;
              }

              float GetFPS() const
              {
                     return fps;
              }

              void IncFrame()
              {
                     totalFrames++;
                     long currTime = stopWatch.Time();
                     if (currTime > 500)
                     {
                            fps = 1000.0f * double(totalFrames - lastFrames) / double(currTime);
                            if (totalFrames > 0x0fffffff)
                                   totalFrames = 0;
                            lastFrames = totalFrames;
                            stopWatch.Start();
                     }
              }
       };
};


#endif

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