SkyLight.cpp

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/*
 * SkyLight.cpp
 *
 * Part of Fly! Legacy project
 *
 * Copyright 2003 Chris Wallace
 *
 * Fly! Legacy 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 of the License, or
 *   (at your option) any later version.
 *
 * Fly! Legacy 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 *   along with Fly! Legacy; if not, write to the Free Software
 *    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 */

#include "../Include/Sky.h"
#include "../Include/Utility.h"


//
// Constructor
//
CSkyLight::CSkyLight (void)
{
}


//
// Initialize lighting tables
//
void CSkyLight::Init (void)
{
}


//
// Update sky lighting attributes
//
void CSkyLight::Update (void)
{
  // Define basic colours
  GLfloat base_sky[4] = {0.39, 0.50, 0.74, 1.0 };
  GLfloat base_fog[4] = {0.84, 0.87, 1.0, 1.0 };

  // TEMP : Assume sun angle 45 degrees
  // sun_angle = PI/2;
  // float sun_deg = RadToDeg (sun_angle);

  // TEMP : Use constant sky brightness 0.5
  float sky_brightness = 0.5;
//  float sky_brightness = 0.1;
  if (sky_brightness > 1.0) sky_brightness = 1.0;
  if (sky_brightness < 0.0) sky_brightness = 0.0;

  // Set sky colour
    sky_colour[0] = base_sky[0] * sky_brightness;
    sky_colour[1] = base_sky[1] * sky_brightness;
    sky_colour[2] = base_sky[2] * sky_brightness;
    sky_colour[3] = base_sky[3];

  // Set fog colour
    fog_colour[0] = base_fog[0] * sky_brightness;
    fog_colour[1] = base_fog[1] * sky_brightness;
    fog_colour[2] = base_fog[2] * sky_brightness;
    fog_colour[3] = base_fog[3];
}

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