gl_material.cpp

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/*
 * Vega Strike
 * Copyright (C) 2001-2002 Daniel Horn & Alan Shieh
 *
 * http://vegastrike.sourceforge.net/
 *
 * 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 "gfxlib.h"
#include "gl_globals.h"
#include <cstring>
//#include "gl_globals.h"
//#include "gfx_transform_vector.h"

static vector< GFXMaterial >materialinfo;
static int selectedmaterial = -1;
void /*GFXDRVAPI*/ GFXSetMaterial( unsigned int &number, const GFXMaterial &material )
{
    number = (unsigned int) -1;     //intended warning for unsigned....
    for (unsigned int i = 0; i < materialinfo.size(); i++)
        if (memcmp( &materialinfo[i], &material, sizeof (GFXMaterial) ) == 0) {
            number = i;
            break;
        }
    if ( number == (unsigned int) (-1) ) {
        //another intended warning
        number = materialinfo.size();
        materialinfo.push_back( material );
    }
}

void /*GFXDRVAPI*/ GFXModifyMaterial( const unsigned int number, const GFXMaterial &material )
{
    materialinfo[number] = material;
}

const GFXMaterial& /*GFXDRVAPI*/ GFXGetMaterial( const unsigned int number )
{
    if ( number >= materialinfo.size() ) {
        static GFXMaterial tmp;
        return tmp;
    }
    return materialinfo[number];
}
GFXBOOL /*GFXDRVAPI*/ GFXGetMaterial( const unsigned int number, GFXMaterial &material )
{
    if ( (number == (unsigned int) -1) || number >= materialinfo.size() )
        return GFXFALSE;
    material = materialinfo[number];
    return GFXTRUE;
}
void /*GFXDRVAPI*/ GFXSelectMaterialAlpha( const unsigned int number, float alpha )
{
    selectedmaterial = -1;
    float matvect[4];
    matvect[0] = materialinfo[number].ar;
    matvect[1] = materialinfo[number].ag;
    matvect[2] = materialinfo[number].ab;
    matvect[3] = materialinfo[number].aa*alpha;
    glMaterialfv( GL_FRONT, GL_AMBIENT, matvect );

    matvect[0] = materialinfo[number].dr;
    matvect[1] = materialinfo[number].dg;
    matvect[2] = materialinfo[number].db;
    matvect[3] = materialinfo[number].da*alpha;
    glMaterialfv( GL_FRONT, GL_DIFFUSE, matvect );

    matvect[0] = materialinfo[number].sr;
    matvect[1] = materialinfo[number].sg;
    matvect[2] = materialinfo[number].sb;
    matvect[3] = materialinfo[number].sa*alpha;
    glMaterialfv( GL_FRONT, GL_SPECULAR, matvect );

    matvect[0] = materialinfo[number].er;
    matvect[1] = materialinfo[number].eg;
    matvect[2] = materialinfo[number].eb;
    matvect[3] = materialinfo[number].ea*alpha;
    glMaterialfv( GL_FRONT, GL_EMISSION, matvect );

    glMaterialfv( GL_FRONT, GL_SHININESS, &materialinfo[number].power );
}
const float zerovect[4] = {0.0};
void /*GFXDRVAPI*/ GFXSelectMaterialHighlights( const unsigned int number,
                                                const GFXColor &ambient,
                                                const GFXColor &diffuse,
                                                const GFXColor &specular,
                                                const GFXColor &emissive )
{
    selectedmaterial = -1;
    float matvect[4];
    matvect[0] = materialinfo[number].ar*ambient.r*ambient.a;
    matvect[1] = materialinfo[number].ag*ambient.g*ambient.a;
    matvect[2] = materialinfo[number].ab*ambient.b*ambient.a;
    matvect[3] = materialinfo[number].aa*ambient.a;
    glMaterialfv( GL_FRONT, GL_AMBIENT, matvect );

    matvect[0] = materialinfo[number].dr*diffuse.r*diffuse.a;
    matvect[1] = materialinfo[number].dg*diffuse.g*diffuse.a;
    matvect[2] = materialinfo[number].db*diffuse.b*diffuse.a;
    matvect[3] = materialinfo[number].da*diffuse.a;
    glMaterialfv( GL_FRONT, GL_DIFFUSE, matvect );

    matvect[0] = materialinfo[number].sr*specular.r*specular.a;
    matvect[1] = materialinfo[number].sg*specular.g*specular.a;
    matvect[2] = materialinfo[number].sb*specular.b*specular.a;
    matvect[3] = materialinfo[number].sa*specular.a;
    glMaterialfv( GL_FRONT, GL_SPECULAR, matvect );

    matvect[0] = emissive.r*emissive.a;
    matvect[1] = emissive.g*emissive.a;
    matvect[2] = emissive.b*emissive.a;
    matvect[3] = emissive.a;
    glMaterialfv( GL_FRONT, GL_EMISSION, matvect );

    glMaterialfv( GL_FRONT, GL_SHININESS, &materialinfo[number].power );
}

void /*GFXDRVAPI*/ GFXSelectMaterial( const unsigned int number )
{
    if (1 || static_cast<int>(number) != selectedmaterial) { //FIXME Last time I checked true or anything was true
        float matvect[4];
        matvect[0] = materialinfo[number].ar;
        matvect[1] = materialinfo[number].ag;
        matvect[2] = materialinfo[number].ab;
        matvect[3] = materialinfo[number].aa;
        glMaterialfv( GL_FRONT, GL_AMBIENT, matvect );

        matvect[0] = materialinfo[number].dr;
        matvect[1] = materialinfo[number].dg;
        matvect[2] = materialinfo[number].db;
        matvect[3] = materialinfo[number].da;
        glMaterialfv( GL_FRONT, GL_DIFFUSE, matvect );

        matvect[0] = materialinfo[number].sr;
        matvect[1] = materialinfo[number].sg;
        matvect[2] = materialinfo[number].sb;
        matvect[3] = materialinfo[number].sa;
        glMaterialfv( GL_FRONT, GL_SPECULAR, matvect );

        matvect[0] = materialinfo[number].er;
        matvect[1] = materialinfo[number].eg;
        matvect[2] = materialinfo[number].eb;
        matvect[3] = materialinfo[number].ea;
        glMaterialfv( GL_FRONT, GL_EMISSION, matvect );

        glMaterialfv( GL_FRONT, GL_SHININESS, &materialinfo[number].power );
        selectedmaterial = number;
    }
}