K3dTimer.h

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/***************************************************************************
 *   Copyright (C) 2007 by Jan Koci   *
 *   honza.koci@email.cz   *
 *   http://kengine.sourceforge.net/tutorial/
 *                                                                         *
 *   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.             *
 ***************************************************************************/

#pragma once

#include <SDL/SDL.h>
#include <SDL/SDL_opengl.h>
#include <SDL/SDL_image.h>
#include "GameData/K3dGameData.h"

#define K_DEFAULT_SPEED 10
#define K_DEFAULT_FPS 25

class K3dTimer
{
                K3dGameData *m_pGameData;       
                float m_fFps;                   
                unsigned int m_uiLastTime;      
                unsigned int m_uiNumFrames;     
                unsigned int m_uiWaitingTime;   
        public:
                K3dTimer ( K3dGameData *_pGameData );
                ~K3dTimer();

                void CalculateFPS();
                bool Wait ( const int _iMsec );

                float GetFPS()
                {
                        return m_fFps;
                }

                unsigned int GetNumFrames()
                {
                        return m_uiNumFrames;
                }

                void SynchronizeSpeed ( float &_fSpeed )
                {
                        if ( m_fFps > K_DEFAULT_FPS )
                        {
                                _fSpeed /= m_fFps;
                        }
                        else
                        {
                                _fSpeed = K_DEFAULT_SPEED;
                        }
                }

};

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