K3dTimer.cpp

Go to the documentation of this file.

/***************************************************************************
 *   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.             *
 ***************************************************************************/

#include "K3dTimer.h"

K3dTimer::K3dTimer(K3dGameData *_pGameData)
{       
        m_pGameData = _pGameData;
        // Set this pointer to the game data
        m_pGameData->SetTimer(this);
        m_fFps = (float)1;
        m_uiLastTime = 0;
        m_uiNumFrames = 0;
        m_uiWaitingTime = 0;
}


K3dTimer::~K3dTimer()
{
}

void K3dTimer::CalculateFPS()
{
        unsigned int uiMiliseconds = SDL_GetTicks() - m_uiLastTime;

        if(uiMiliseconds == 0)
        {
                uiMiliseconds = 1;
        }

        m_fFps = (float) 1 / (uiMiliseconds / (float) 1000);
        m_uiLastTime = SDL_GetTicks();
        // Add number of frames from game start
        m_uiNumFrames++;
}

bool  K3dTimer::Wait(const int _iMsec)
{
        unsigned int uiCurrTime = SDL_GetTicks();
        unsigned int uiDelay = uiCurrTime - m_uiWaitingTime;
        if ((int) uiDelay >= _iMsec)
        {
                m_uiWaitingTime = uiCurrTime;
                return true;
        }
        return false;
}

---