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/* ----------------------------------------------------------------------- *
 * This file is part of GEL, http://www.imm.dtu.dk/GEL
 * Copyright (C) the authors and DTU Informatics
 * For license and list of authors, see ../../doc/intro.pdf
 * ----------------------------------------------------------------------- */

/**
 * @file Material.h
 * @brief Contains a simple struct for OpenGL'ish materials.
 */

#ifndef __GEOMETRY_MATERIAL_H__
#define __GEOMETRY_MATERIAL_H__

#include <string>

namespace Geometry
{
    /// Simple material definitions.
    struct Material
    {
        /// Name of material
        std::string name;
        
        /// Diffuse reflection
        float diffuse[4];                       
        
        /// Ambient reflection
        float ambient[4];
        
        /// Specular reflection
        float specular[4];
        
        /// Specular exponent
        float shininess;                        
        
        /// Index of refraction
        float ior;
        
        /// Transmission filter
        float transmission[3];
        
        /** Illumination model
         0 - Color
         1 - Color and ambient
         2 - Color and ambient and highlight
         3 - Reflection
         4 - Reflection and refraction
         Refer to the MTL format specification for more models. 
         Only numbers from 0 to 10 have a specific meaning. */
        int illum;
        
        bool has_texture;
        std::string tex_path, tex_name;
        int tex_id;
        
        Material()
          :     name("default"), tex_path(""), tex_name(""), tex_id(-1), has_texture(false)
        {
            ior = 1.5f;
            shininess = 0.0f;
            diffuse[0] = 0.8f;
            diffuse[1] = 0.8f;
            diffuse[2] = 0.8f;
            diffuse[3] = 1.0f;
            ambient[0] = 0.2f;
            ambient[1] = 0.2f;
            ambient[2] = 0.2f;
            ambient[3] = 1.0f;
            specular[0] = 0.0f;
            specular[1] = 0.0f;
            specular[2] = 0.0f;
            specular[3] = 1.0f;
            transmission[0] = 0.0f;
            transmission[1] = 0.0f;
            transmission[2] = 0.0f;
            illum = 1;
        }
    };
}

#endif