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/*************************************************************************/
/*  sky_box.h                                                            */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
/*                    http://www.godotengine.org                         */
/*************************************************************************/
/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur.                 */
/* Copyright (c) 2014-2017 Godot Engine contributors (cf. AUTHORS.md)    */
/*                                                                       */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the       */
/* "Software"), to deal in the Software without restriction, including   */
/* without limitation the rights to use, copy, modify, merge, publish,   */
/* distribute, sublicense, and/or sell copies of the Software, and to    */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions:                                             */
/*                                                                       */
/* The above copyright notice and this permission notice shall be        */
/* included in all copies or substantial portions of the Software.       */
/*                                                                       */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
/*************************************************************************/
#ifndef Sky_H
#define Sky_H

#include "scene/resources/texture.h"

class Sky : public Resource {
	GDCLASS(Sky, Resource);

public:
	enum RadianceSize {
		RADIANCE_SIZE_256,
		RADIANCE_SIZE_512,
		RADIANCE_SIZE_1024,
		RADIANCE_SIZE_2048,
		RADIANCE_SIZE_MAX
	};

private:
	RadianceSize radiance_size;

protected:
	static void _bind_methods();
	virtual void _radiance_changed() = 0;

public:
	void set_radiance_size(RadianceSize p_size);
	RadianceSize get_radiance_size() const;
	Sky();
};

VARIANT_ENUM_CAST(Sky::RadianceSize)

class PanoramaSky : public Sky {
	GDCLASS(PanoramaSky, Sky);

private:
	RID sky;
	Ref<Texture> panorama;

protected:
	static void _bind_methods();
	virtual void _radiance_changed();

public:
	void set_panorama(const Ref<Texture> &p_panorama);
	Ref<Texture> get_panorama() const;

	virtual RID get_rid() const;

	PanoramaSky();
	~PanoramaSky();
};

class ProceduralSky : public Sky {
	GDCLASS(ProceduralSky, Sky);

public:
	enum TextureSize {
		TEXTURE_SIZE_1024,
		TEXTURE_SIZE_2048,
		TEXTURE_SIZE_4096,
		TEXTURE_SIZE_MAX
	};

private:
	Color sky_top_color;
	Color sky_horizon_color;
	float sky_curve;
	float sky_energy;

	Color ground_bottom_color;
	Color ground_horizon_color;
	float ground_curve;
	float ground_energy;

	Color sun_color;
	float sun_latitude;
	float sun_longitude;
	float sun_angle_min;
	float sun_angle_max;
	float sun_curve;
	float sun_energy;

	TextureSize texture_size;

	RID sky;
	RID texture;

	bool update_queued;

protected:
	static void _bind_methods();
	virtual void _radiance_changed();

	void _update_sky();
	void _queue_update();

public:
	void set_sky_top_color(const Color &p_sky_top);
	Color get_sky_top_color() const;

	void set_sky_horizon_color(const Color &p_sky_horizon);
	Color get_sky_horizon_color() const;

	void set_sky_curve(float p_curve);
	float get_sky_curve() const;

	void set_sky_energy(float p_energy);
	float get_sky_energy() const;

	void set_ground_bottom_color(const Color &p_ground_bottom);
	Color get_ground_bottom_color() const;

	void set_ground_horizon_color(const Color &p_ground_horizon);
	Color get_ground_horizon_color() const;

	void set_ground_curve(float p_curve);
	float get_ground_curve() const;

	void set_ground_energy(float p_energy);
	float get_ground_energy() const;

	void set_sun_color(const Color &p_sun);
	Color get_sun_color() const;

	void set_sun_latitude(float p_angle);
	float get_sun_latitude() const;

	void set_sun_longitude(float p_angle);
	float get_sun_longitude() const;

	void set_sun_angle_min(float p_angle);
	float get_sun_angle_min() const;

	void set_sun_angle_max(float p_angle);
	float get_sun_angle_max() const;

	void set_sun_curve(float p_curve);
	float get_sun_curve() const;

	void set_sun_energy(float p_energy);
	float get_sun_energy() const;

	void set_texture_size(TextureSize p_size);
	TextureSize get_texture_size() const;

	virtual RID get_rid() const;

	ProceduralSky();
	~ProceduralSky();
};

VARIANT_ENUM_CAST(ProceduralSky::TextureSize)

#endif // Sky_H