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sglMaterial.hpp

/*****************************************************************************
 * SGL: A Scene Graph Library
 *
 * Copyright (C) 1997-2001  Scott McMillan   All Rights Reserved.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library 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
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public
 * License along with this library; if not, write to the Free
 * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 *****************************************************************************
 *     File: sglMaterial.hpp
 *  Created: 30 September 1997
 *  Summary: container for OpenGL material parameters and drawing code
 *****************************************************************************/

#ifndef __SGL_MATERIAL_HPP
#define __SGL_MATERIAL_HPP

#include <sgl.h>
#include <sglVector.hpp>
#include <sglStatelet.hpp>

//============================================================================

class SGL_DLL_API sglMaterial : public sglStatelet
{
public:
   enum SideEnum
   {
      eFRONT           = GL_FRONT,

      eBACK            = GL_BACK,

      eFRONT_AND_BACK  = GL_FRONT_AND_BACK
   };

   enum ColorModeEnum
   {
      eOFF                  = 0,

      eAMBIENT              = GL_AMBIENT,

      eDIFFUSE              = GL_DIFFUSE,

      eSPECULAR             = GL_SPECULAR,

      eAMBIENT_AND_DIFFUSE  = GL_AMBIENT_AND_DIFFUSE,

      eEMISSION             = GL_EMISSION
   };

public:
   sglMaterial();

   virtual ~sglMaterial();

   void setAmbient(float  r, float  g, float  b,
                   SideEnum side = eFRONT_AND_BACK);

   void getFrontAmbient(float &r, float &g, float &b) const;

   void getBackAmbient(float &r, float &g, float &b) const;

   void setDiffuse(float  r, float  g, float  b,
                   SideEnum side = eFRONT_AND_BACK);

   void getFrontDiffuse(float &r, float &g, float &b) const;

   void getBackDiffuse(float &r, float &g, float &b) const;

   void setSpecular(float  r, float  g, float  b,
                    SideEnum side = eFRONT_AND_BACK);

   void getFrontSpecular(float &r, float &g, float &b) const;

   void getBackSpecular(float &r, float &g, float &b) const;

   void setEmission(float  r, float  g, float  b,
                    SideEnum side = eFRONT_AND_BACK);

   void getFrontEmission(float &r, float &g, float &b) const;

   void getBackEmission(float &r, float &g, float &b) const;

   void setAlpha(float alpha, SideEnum side = eFRONT_AND_BACK);

   float getFrontAlpha() const { return m_front_diffuse[3]; }

   float getBackAlpha() const { return m_back_diffuse[3]; }

   void setShininess(float shininess, SideEnum side = eFRONT_AND_BACK);

   float getFrontShininess() const { return m_front_shininess; }

   float getBackShininess() const { return m_back_shininess; }

   void setColorMaterial(SideEnum side, ColorModeEnum mode);

   void getColorMaterial(SideEnum &side, ColorModeEnum &mode) const
      { mode = m_color_material_mode; side = m_color_material_side; }

   // See sglStatelet::apply() for details.
   void apply(sglCurrState *curr_state) const;

   // See sglStatelet::getSorted() for details.
   virtual bool getSorted() const { return true; }

   // See sglObject::printInfo() for details.
   virtual void printInfo(ostream &ostrm, const char *indent_string) const;

private:
   // copy constructor forbidden
   sglMaterial(sglMaterial &);
   // assignment operator forbidden
   sglMaterial &operator=(const sglMaterial &);

private:
   // material color properties
   sglVec4f m_front_ambient;
   sglVec4f m_front_diffuse;
   sglVec4f m_front_specular;
   sglVec4f m_front_emission;
   sglVec4f m_back_ambient;
   sglVec4f m_back_diffuse;
   sglVec4f m_back_specular;
   sglVec4f m_back_emission;

   // exponent material property
   float m_front_shininess;
   float m_back_shininess;

   // color material mode
   ColorModeEnum m_color_material_mode;
   SideEnum m_color_material_side;
};

#endif

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