//
// texture_cloud.h
//
// Procedural cloud texture.
//
// Copyright (C) J. Belson	2003.09.27
//
// $Id: texture_cloud.h,v 1.1 2003/10/11 18:11:00 jon Exp $
//


#ifndef _TEXTURE_CLOUD_H_
#define _TEXTURE_CLOUD_H_

#include "texture.h"


#define USE_OLD_PERLIN
//#undef USE_OLD_PERLIN


/**
 * Settings structure for cloud texture.
 */
struct textset_cloud : public textset_noise
{
	fcolour zenith_colour;
	fcolour horizon_colour;
	float	cloud_cover;

	static void load_settings(textset_cloud& ts);
};



/**
 * Procedural cloud texture.
 */
class texture_cloud : public texture
{
private:
#ifdef USE_OLD_PERLIN
	perlin* noise;
#else
	perlin2*	noise;
#endif

	float	persistence;
	float	presence;
	float	cloud_cover;
	float	scale;

	fcolour zenith_colour;
	fcolour horizon_colour;
	settings* my_settings;

	enum {
		SKYDOME_OFFSET	= 40,
		SKYDOME_SCALE	= 70
	};

public:
	texture_cloud(const textset_cloud& ts);
	virtual ~texture_cloud();

	virtual fcolour colour(float s, float t, float u = 0, vector3d* normal = 0);
};



#endif	// _TEXTURE_CLOUD_H_