cmake/Modules/FindJson.cmake


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# Look for JSONCPP if asked to.
# We use a bundled version by default because some distros ship versions of
# JSONCPP that cause segfaults and other memory errors when we link with them.
# See https://github.com/minetest/minetest/issues/1793

mark_as_advanced(JSON_LIBRARY JSON_INCLUDE_DIR)
option(ENABLE_SYSTEM_JSONCPP "Enable using a system-wide JSONCPP.  May cause segfaults and other memory errors!" FALSE)

if(ENABLE_SYSTEM_JSONCPP)
	find_library(JSON_LIBRARY NAMES jsoncpp)
	find_path(JSON_INCLUDE_DIR json/features.h PATH_SUFFIXES jsoncpp)

	include(FindPackageHandleStandardArgs)
	find_package_handle_standard_args(JSONCPP DEFAULT_MSG JSON_LIBRARY JSON_INCLUDE_DIR)

	if(JSONCPP_FOUND)
		message(STATUS "Using system JSONCPP library.")
	endif()
endif()

if(NOT JSONCPP_FOUND)
	message(STATUS "Using bundled JSONCPP library.")
	set(JSON_INCLUDE_DIR ${PROJECT_SOURCE_DIR}/json)
	set(JSON_LIBRARY jsoncpp)
	add_subdirectory(json)
endif()
/*
Minetest
Copyright (C) 2013 celeron55, Perttu Ahola <celeron55@gmail.com>

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.

This program 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 Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/

#pragma once

#include "irrlichttypes_extrabloated.h"
#include <ISceneNode.h>
#include <array>
#include "camera.h"
#include "irr_ptr.h"
#include "shader.h"
#include "skyparams.h"

#define SKY_MATERIAL_COUNT 12

class ITextureSource;

// Skybox, rendered with zbuffer turned off, before all other nodes.
class Sky : public scene::ISceneNode
{
public:
	//! constructor
	Sky(s32 id, RenderingEngine *rendering_engine, ITextureSource *tsrc, IShaderSource *ssrc);

	virtual void OnRegisterSceneNode();

	//! renders the node.
	virtual void render();

	virtual const aabb3f &getBoundingBox() const { return m_box; }

	// Used by Irrlicht for optimizing rendering
	virtual video::SMaterial &getMaterial(u32 i) { return m_materials[i]; }
	virtual u32 getMaterialCount() const { return SKY_MATERIAL_COUNT; }

	void update(float m_time_of_day, float time_brightness, float direct_brightness,
			bool sunlight_seen, CameraMode cam_mode, float yaw, float pitch);

	float getBrightness() { return m_brightness; }

	const video::SColor &getBgColor() const
	{
		return m_visible ? m_bgcolor : m_fallback_bg_color;
	}

	const video::SColor &getSkyColor() const
	{
		return m_visible ? m_skycolor : m_fallback_bg_color;
	}

	void setSunVisible(bool sun_visible) { m_sun_params.visible = sun_visible; }
	bool getSunVisible() const { return m_sun_params.visible; }
	void setSunTexture(const std::string &sun_texture,
		const std::string &sun_tonemap, ITextureSource *tsrc);
	void setSunScale(f32 sun_scale) { m_sun_params.scale = sun_scale; }
	void setSunriseVisible(bool glow_visible) { m_sun_params.sunrise_visible = glow_visible; }
	void setSunriseTexture(const std::string &sunglow_texture, ITextureSource* tsrc);

	void setMoonVisible(bool moon_visible) { m_moon_params.visible = moon_visible; }
	bool getMoonVisible() const { return m_moon_params.visible; }
	void setMoonTexture(const std::string &moon_texture,
		const std::string &moon_tonemap, ITextureSource *tsrc);
	void setMoonScale(f32 moon_scale) { m_moon_params.scale = moon_scale; }

	void setStarsVisible(bool stars_visible) { m_star_params.visible = stars_visible; }
	void setStarCount(u16 star_count);
	void setStarColor(video::SColor star_color) { m_star_params.starcolor = star_color; }
	void setStarScale(f32 star_scale) { m_star_params.scale = star_scale; updateStars(); }

	bool getCloudsVisible() const { return m_clouds_visible && m_clouds_enabled; }
	const video::SColorf &getCloudColor() const { return m_cloudcolor_f; }

	void setVisible(bool visible) { m_visible = visible; }
	// Set only from set_sky API
	void setCloudsEnabled(bool clouds_enabled) { m_clouds_enabled = clouds_enabled; }
	void setFallbackBgColor(video::SColor fallback_bg_color)
	{
		m_fallback_bg_color = fallback_bg_color;
	}
	void overrideColors(video::SColor bgcolor, video::SColor skycolor)
	{
		m_bgcolor = bgcolor;
		m_skycolor = skycolor;
	}
	void setSkyColors(const SkyColor &sky_color);
	void setHorizonTint(video::SColor sun_tint, video::SColor moon_tint,
		const std::string &use_sun_tint);
	void setInClouds(bool clouds) { m_in_clouds = clouds; }
	void clearSkyboxTextures() { m_sky_params.textures.clear(); }
	void addTextureToSkybox(const  std::string &texture, int material_id,
		ITextureSource *tsrc);
	const video::SColorf &getCurrentStarColor() const { return m_star_color; }

	float getSkyBodyOrbitTilt() const { return m_sky_body_orbit_tilt; }

private:
	aabb3f m_box;
	video::SMaterial m_materials[SKY_MATERIAL_COUNT];
	// How much sun & moon transition should affect horizon color
	float m_horizon_blend()
	{
		if (!m_sunlight_seen)
			return 0;
		float x = m_time_of_day >= 0.5 ? (1 - m_time_of_day) * 2
					       : m_time_of_day * 2;

		if (x <= 0.3)