Es++ Class: OpenGLFog

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Source code

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 *
 * Copyright (c) 2015 Antillia.com TOSHIYUKI ARAI. ALL RIGHTS RESERVED.
 *
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 *    derived from this software without specific prior written permission.
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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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 *
 *  OpenGLFog.h
 *
 *****************************************************************************/

#pragma once

#include <es++/Exception.h>
#include <es++/opengl/OpenGLObject.h>
#include <math.h>

namespace Es {

class OpenGLFog :public OpenGLObject {
private:
 
public:
  OpenGLFog()
  :OpenGLObject(NULL)
  {
    glEnable(GL_FOG);
  } 

  ~OpenGLFog()
  {
    glDisable(GL_FOG);
  }
 
  //mode = GL_LINEARr, AGL_EXP, AGL_EXP2 
  void mode(GLfloat mode = GL_LINEAR)
  {
    glFogi(GL_FOG_MODE, mode);
  }

  void density(GLfloat value)
  {
    glFogf(GL_FOG_DENSITY, value);
  }

  //Specify start position for GL_LINEAR mode
  void start(GLfloat value)
  {
    glFogf(GL_FOG_START, value);
  }
    
  //Specify end position for GL_LINEAR mode
  void end(GLfloat value)
  {
    glFogf(GL_FOG_END, value);
  }
    
  //Specify color index
  void index(GLfloat value)
  {
    glFogf(GL_FOG_INDEX, value);        
  }
    
  //Specify color index
  void color(GLfloat* value)
  {
    assert(value);
    glFogfv(GL_FOG_COLOR, value);        
  }

  void color(GLfloat r, GLfloat g, GLfloat b, GLfloat a)
  {
    GLfloat value[] = {r, g, b, a};
    glFogfv(GL_FOG_COLOR, value);
  }

  void color(GLint* value)
  {
    assert(value);
    glFogiv(GL_FOG_COLOR, value);
  }

};

}


Last modified: 4 Apr 2019

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