K3dLight.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 "K3dLight.h"
#include <SDL/SDL_opengl.h>

K3dLight::K3dLight()
{
        Reset();
}

K3dLight::~K3dLight()
{
        Destroy();
}

void K3dLight::InitLight()
{
        cout << "void K3dLight::InitLight()" << endl;
        m_afAmbient[0] = 0.1f;
        m_afAmbient[1] = 0.1f;
        m_afAmbient[2] = 0.1f;
        m_afAmbient[3] = 1.0f;
        m_afDiffuse[0] = 1.0f;
        m_afDiffuse[1] = 1.0f;
        m_afDiffuse[2] = 1.0f;
        m_afDiffuse[3] = 1.0f;
        m_afSpecular[0] = 0.5f;
        m_afSpecular[1] = 0.5f;
        m_afSpecular[2] = 0.5f;
        m_afSpecular[3] = 0.0f;
        m_fShininess = 5.0f;
        m_afPosition[0] = 60000.0f;
        m_afPosition[1] = 60000.0f;
        m_afPosition[2] = 60000.0f;
        m_afPosition[3] = 0.0f;
        m_afDirection[0] = -60000.0f;
        m_afDirection[1] = -60000.0f;
        m_afDirection[2] = -60000.0f;
        m_afEmission[0] = 0.5f;
        m_afEmission[1] = 0.5f;
        m_afEmission[2] = 0.5f;
        m_afEmission[3] = 1.0f;
        m_fLinearAttenuation = 0.2f;
        m_iSpotExponent = 1;
        m_iSpotCutoff = 180;
}


void K3dLight::Reset()
{
        for ( int i=0; i<4; i++ )
        {
                m_afAmbient[i] = ( float ) 0;
                m_afDiffuse[i] = ( float ) 0;
                m_afEmission[i] = ( float ) 0;
                m_afPosition[i] = ( float ) 0;
                m_afSpecular[i] = ( float ) 0;
                if ( i<3 )
                {
                        m_afDirection[i] = ( float ) 0;
                }
        }
        m_fLinearAttenuation = ( float ) 0;
        m_fShininess = ( float ) 0;
        m_iSpotCutoff = 0;
        m_iSpotExponent = 0;

}

void K3dLight::Destroy()
{
        Reset();
}

void K3dLight::DrawLight()
{
        glLightfv ( GL_LIGHT0, GL_AMBIENT, m_afAmbient );
        glLightfv ( GL_LIGHT0, GL_DIFFUSE, m_afDiffuse );
        glLightfv ( GL_LIGHT0, GL_SPECULAR, m_afSpecular );
        glLightfv ( GL_LIGHT0, GL_POSITION, m_afPosition );
        glLightfv ( GL_LIGHT0, GL_SPOT_DIRECTION, m_afDirection );
        glLightf ( GL_LIGHT0, GL_LINEAR_ATTENUATION, m_fLinearAttenuation );
        glLighti ( GL_LIGHT0, GL_SPOT_EXPONENT, m_iSpotExponent );
        glLighti ( GL_LIGHT0, GL_SPOT_CUTOFF, m_iSpotCutoff );
        glEnable ( GL_LIGHTING );         // Enable lighting
        glEnable ( GL_LIGHT0 );           // Enable light 0
        glEnable ( GL_COLOR_MATERIAL );  // Enable material color

}

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