D:/CHAI3D/build-2-0-0/2.0.0/win32/src/scenegraph/CLight.h

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//===========================================================================
/*
    This file is part of the CHAI 3D visualization and haptics libraries.
    Copyright (C) 2003-2009 by CHAI 3D. All rights reserved.

    This library is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License("GPL") version 2
    as published by the Free Software Foundation.

    For using the CHAI 3D libraries with software that can not be combined
    with the GNU GPL, and for taking advantage of the additional benefits
    of our support services, please contact CHAI 3D about acquiring a
    Professional Edition License.

    \author    <http://www.chai3d.org>
    \author    Francois Conti
    \version   2.0.0 $Rev: 251 $
*/
//===========================================================================

//---------------------------------------------------------------------------
#ifndef CLightH
#define CLightH
//---------------------------------------------------------------------------
#include "math/CMaths.h"
#include "graphics/CColor.h"
#include "graphics/CMacrosGL.h"
#include "scenegraph/CGenericObject.h"
//---------------------------------------------------------------------------
class cWorld;
//---------------------------------------------------------------------------

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

//===========================================================================
//===========================================================================
class cLight : public cGenericObject
{

    //-----------------------------------------------------------------------
    // FRIENDS:
    //-----------------------------------------------------------------------

    friend class cWorld;

    friend class cCamera;


  public:
    
    //-----------------------------------------------------------------------
    // CONSTRUCTOR & DESTRUCTOR:
    //-----------------------------------------------------------------------

    cLight(cWorld* a_world = NULL);
        
    ~cLight();


        //-----------------------------------------------------------------------
    // MEMBERS:
        //-----------------------------------------------------------------------

    cColorf m_ambient;
        
    cColorf m_diffuse;
    
    cColorf m_specular;


        //-----------------------------------------------------------------------
    // METHODS:
        //-----------------------------------------------------------------------

    void setDir(const cVector3d& a_direction);

    void setDir(const double a_x, const double a_y, const double a_z);

    cVector3d getDir() const { return (m_localRot.getCol0()); }

    void setDirectionalLight(bool a_directionalLight) { m_directionalLight = a_directionalLight; }

    bool getDirectionalLight() { return m_directionalLight; }

    void setAttConstant(const GLfloat& a_value) { m_attConstant = cClamp(a_value, 0.0f, 1.0f); }

    GLfloat getAttConstant() const { return (m_attConstant); }

    void setAttLinear(const GLfloat& a_value) { m_attLinear = cClamp(a_value, 0.0f, 1.0f); }

    GLfloat getAttLinear() const { return (m_attLinear); }

    void setAttQuadratic(const GLfloat& a_value) { m_attQuadratic = cClamp(a_value, 0.0f, 1.0f); }

    GLfloat getAttQuadratic() const { return (m_attQuadratic); }

    void setSpotExponent(const GLfloat& a_value) { m_spotExponent = cClamp(a_value, 0.0f, 100.0f); }

    GLfloat getSpotExponent() const { return (m_spotExponent); }
    
    void setCutOffAngle(const GLfloat& a_value);

    GLfloat getCutOffAngle() const { return (m_cutOffAngle); }

    void setEnabled(const bool& a_enabled) { m_enabled = a_enabled; }

    bool getEnabled() const { return (m_enabled); }


  protected:
  
        //-----------------------------------------------------------------------
    // MEMBERS:
        //-----------------------------------------------------------------------
        
    cWorld* m_parentWorld;
    
    GLfloat m_attConstant;
    
    GLfloat m_attLinear;
    
    GLfloat m_attQuadratic;
    
    GLfloat m_spotExponent;
    
    GLfloat m_cutOffAngle;
    
    bool m_enabled;
    
    bool m_directionalLight;    

    GLint m_glLightNumber;


        //-----------------------------------------------------------------------
        // METHODS:
        //-----------------------------------------------------------------------
    
    void renderLightSource();
};

//---------------------------------------------------------------------------
#endif
//---------------------------------------------------------------------------

---

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