K3dOpenGL.cpp

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

#include "K3dOpenGL.h"

K3dOpenGL::K3dOpenGL(K3dGameData *_pGameData)
{
        m_pGameData = _pGameData;
        // Set this pointer to the game data
        m_pGameData->SetOpenGL(this);
}

K3dOpenGL::~K3dOpenGL()
{
}

void K3dOpenGL::Set2DProjection()
{
        glMatrixMode(GL_PROJECTION);
        glLoadIdentity();
        glOrtho(0,m_pGameData->GetGraphicOption()->iWidth,0,m_pGameData->GetGraphicOption()->iHeight,-1,1);
        glMatrixMode(GL_MODELVIEW);
        glLoadIdentity(); 
}

void K3dOpenGL::Set3DProjection()
{
        glMatrixMode(GL_PROJECTION);
        glLoadIdentity();

        gluPerspective((GLdouble)m_pGameData->GetGraphicOption()->iFovy, (GLdouble)m_pGameData->GetGraphicOption()->iWidth/(GLdouble)m_pGameData->GetGraphicOption()->iHeight,
                (GLdouble)m_pGameData->GetGraphicOption()->iNearPlane, (GLdouble)m_pGameData->GetGraphicOption()->iFarPlane);

        glMatrixMode(GL_MODELVIEW);
        glLoadIdentity();
}

void K3dOpenGL::ResizeGL(const int _iWidth, int _iHeight)
{
        if(_iHeight == 0)
                _iHeight = 1;

        glViewport(0, 0, _iWidth, _iHeight);

        // Set screen width height to the graphics option
        TGraphicOption *ptGraphics = m_pGameData->GetGraphicOption();
        ptGraphics->iWidth = _iWidth;
        ptGraphics->iHeight = _iHeight;

        Set3DProjection();
        //Set2DProjection();
}

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