//
// texture_skydome.cc
//
// Skydome texture.
//
// Copyright (C) J. Belson	2003.10.05
//
// $Id: texture_skydome.cc,v 1.1 2003/10/11 18:11:00 jon Exp $
//


#include "texture_skydome.h"


/**
 * Constructor.
 */
texture_skydome::texture_skydome(textset& ts)
	: texture(ts)
{
	;
}


/**
 * Calculate colour at specified point.
 * @param	s	Texture coordinate.
 * @param	t	Texture coordinate.
 * @param	u	Texture coordinate.
 * @return		Colour at specified point.
 */
fcolour texture_skydome::colour(float /*s*/, float /*t*/, float u, vector3d* view_direction)
{
fg.alpha = 0.5;
bg.alpha = 0.5;
	fcolour difference = bg - fg;
	fcolour sky = bg + difference * (u - SKYDOME_OFFSET)/SKYDOME_SCALE;
sky.alpha = 1.0;
	return sky;
}