/*
   orxonox - the future of 3D-vertical-scrollers

   Copyright (C) 2004 orx

   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, or (at your option)
   any later version.

### File Specific:
   main-programmer: hdavid, amaechler
*/

#include "volfog_effect.h"

#include "util/loading/load_param.h"
#include "util/loading/factory.h"

#include "glincl.h"

#include "shell_command.h"
/*SHELL_COMMAND(activateVolFog, VolFogEffect, VolFogEffect::activate)
  ->setAlias("aVolFog");
SHELL_COMMAND(deactivateVolFog, VolFogEffect, VolFogEffect::deactivate)
  ->setAlias("dVolFog");*/

using namespace std;

CREATE_FACTORY(VolFogEffect, CL_VOLFOG_EFFECT);

VolFogEffect::VolFogEffect(const TiXmlElement* root)
{
  this->setClassID(CL_VOLFOG_EFFECT, "VolFogEffect");

  this->volfogMode = GL_LINEAR;
  this->volfogDensity = 0.001f;
  this->volfogStart = 10.0f;
  this->volfogEnd = 1000.0f;

  if (root != NULL)
    this->loadParams(root);

  this->activate();
}



VolFogEffect::~VolFogEffect()
{
  this->deactivate();
}


void VolFogEffect::loadParams(const TiXmlElement* root)
{
  WeatherEffect::loadParams(root);

  LoadParam(root, "volfog-mode", this, VolFogEffect, setVolFogMode);
  LoadParam(root, "volfog-density", this, VolFogEffect, setVolFogDensity);
  LoadParam(root, "volfog-color", this, VolFogEffect, setVolFogColor);


}

bool VolFogEffect::init()
{}



bool VolFogEffect::activate()
{
  PRINTF(0)( "Enabling VolFog Effect, mode: %i, density: %f, start: %f, end: %f, color %f, %f, %f\n", this->volfogMode, this->volfogDensity,
             this->volfogStart, this->volfogEnd, this->colorVector.x, this->colorVector.y, this->colorVector.z);

  glEnable(GL_FOG);
  {
    //GLfloat volfogColor[4] = {0.7, 0.6, 0.6, 1.0};
    GLfloat volfogColor[4] = { colorVector.x, colorVector.y, colorVector.z, 1.0};

    glFogi(GL_FOG_MODE, this->volfogMode);
    glFogfv(GL_FOG_COLOR, volfogColor);
    glFogf(GL_FOG_DENSITY, this->volfogDensity);
    glHint(GL_FOG_HINT, GL_DONT_CARE);
    glFogf(GL_FOG_START, this->volfogStart);
    glFogf(GL_FOG_END, this->volfogEnd);

    //glVolFogi(GL_VOLFOG_COORDINATE_SOURCE, GL_VOLFOG_COORDINATE);
  }
  glClearColor(0.5, 0.5, 0.5, 1.0);
}



bool VolFogEffect::deactivate()
{
  PRINTF(0)("Deactivating VolFog Effect");
	glDisable(GL_FOG);
}



GLint VolFogEffect::stringToVolFogMode(const std::string& mode)
{
  if(mode == "GL_LINEAR")
    return GL_LINEAR;
  else if(mode == "GL_EXP")
    return GL_EXP;
  else if(mode == "GL_EXP2" )
    return GL_EXP2;
  else
    return -1;
}