src/clouds.h


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/*
Minetest-c55
Copyright (C) 2010-2011 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 General Public License as published by
the Free Software Foundation; either version 2 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 General Public License for more details.

You should have received a copy of the GNU 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.
*/

#ifndef CLOUDS_HEADER
#define CLOUDS_HEADER

#include "common_irrlicht.h"
#include <iostream>

class Clouds : public scene::ISceneNode
{
public:
	Clouds(
			scene::ISceneNode* parent,
			scene::ISceneManager* mgr,
			s32 id,
			float cloud_y,
			u32 seed
	);

	~Clouds();

	/*
		ISceneNode methods
	*/

	virtual void OnRegisterSceneNode();

	virtual void render();
	
	virtual const core::aabbox3d<f32>& getBoundingBox() const
	{
		return m_box;
	}

	virtual u32 getMaterialCount() const
	{
		return 1;
	}

	virtual video::SMaterial& getMaterial(u32 i)
	{
		return m_material;
	}
	
	/*
		Other stuff
	*/

	void step(float dtime);

	void update(v2f camera_p, float brightness);

private:
	video::SMaterial m_material;
	core::aabbox3d<f32> m_box;
	float m_cloud_y;
	float m_brightness;
	u32 m_seed;
	v2f m_camera_pos;
	float m_time;
};


#endif
/*
Minetest
Copyright (C) 2010-2013 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.
*/

#ifndef MAP_HEADER
#define MAP_HEADER

#include <iostream>
#include <sstream>
#include <set>
#include <map>
#include <list>

#include "irrlichttypes_bloated.h"
#include "mapnode.h"
#include "constants.h"
#include "voxel.h"
#include "modifiedstate.h"
#include "util/container.h"
#include "nodetimer.h"

class Settings;
class Database;
class ClientMap;
class MapSector;
class ServerMapSector;
class MapBlock;
class NodeMetadata;
class IGameDef;
class IRollbackManager;
class EmergeManager;
class ServerEnvironment;
struct BlockMakeData;
struct MapgenParams;


/*
	MapEditEvent
*/

#define MAPTYPE_BASE 0
#define MAPTYPE_SERVER 1
#define MAPTYPE_CLIENT 2

enum MapEditEventType{
	// Node added (changed from air or something else to something)
	MEET_ADDNODE,
	// Node removed (changed to air)
	MEET_REMOVENODE,
	// Node swapped (changed without metadata change)
	MEET_SWAPNODE,
	// Node metadata of block changed (not knowing which node exactly)
	// p stores block coordinate
	MEET_BLOCK_NODE_METADATA_CHANGED,
	// Anything else (modified_blocks are set unsent)
	MEET_OTHER
};

struct MapEditEvent
{
	MapEditEventType type;
	v3s16 p;
	MapNode n;
	std::set<v3s16> modified_blocks;
	u16 already_known_by_peer;

	MapEditEvent():
		type(MEET_OTHER),
		n(CONTENT_AIR),
		already_known_by_peer(0)
	{ }

	MapEditEvent * clone()
	{
		MapEditEvent *event = new MapEditEvent();
		event->type = type;
		event->p = p;
		event->n = n;
		event->modified_blocks = modified_blocks;
		return event;
	}

	VoxelArea getArea()
	{
		switch(type){
		case MEET_ADDNODE:
			return VoxelArea(p);
		case MEET_REMOVENODE:
			return VoxelArea(p);
		case MEET_SWAPNODE:
			return VoxelArea(p);
		case MEET_BLOCK_NODE_METADATA_CHANGED:
		{
			v3s16 np1 = p*MAP_BLOCKSIZE;
			v3s16 np2 = np1 + v3s16(1,1,1)*MAP_BLOCKSIZE - v3s16(1,1,1);
			return VoxelArea(np1, np2);
		}
		case MEET_OTHER:
		{
			VoxelArea a;
			for(std::set<v3s16>::iterator
					i = modified_blocks.begin();
					i != modified_blocks.end(); ++i)
			{
				v3s16 p = *i;
				v3s16 np1 = p*MAP_BLOCKSIZE;
				v3s16 np2 = np1 + v3s16(1,1,1)*MAP_BLOCKSIZE - v3s16(1,1,1);
				a.addPoint(np1);
				a.addPoint(np2);
			}
			return a;
		}
		}
		return VoxelArea();
	}
};

class MapEventReceiver
{
public:
	// event shall be deleted by caller after the call.
	virtual void onMapEditEvent(MapEditEvent *event) = 0;
};

class Map /*: public NodeContainer*/
{
public:

	Map(std::ostream &dout, IGameDef *gamedef);
	virtual ~Map();

	/*virtual u16 nodeContainerId() const
	{
		return NODECONTAINER_ID_MAP;
	}*/

	virtual s32 mapType() const
	{
		return MAPTYPE_BASE;
	}

	/*
		Drop (client) or delete (server) the map.
	*/
	virtual void drop()
	{
		delete this;
	}

	void addEventReceiver(MapEventReceiver *event_receiver);
	void removeEventReceiver(MapEventReceiver *event_receiver);
	// event shall be deleted by caller after the call.
	void dispatchEvent(MapEditEvent *event);

	// On failure returns NULL
	MapSector * getSectorNoGenerateNoExNoLock(v2s16 p2d);
	// Same as the above (there exists no lock anymore)
	MapSector * getSectorNoGenerateNoEx(v2s16 p2d);
	// On failure throws InvalidPositionException
	MapSector * getSectorNoGenerate(v2s16 p2d);
	// Gets an existing sector or creates an empty one
	//MapSector * getSectorCreate(v2s16 p2d);

	/*
		This is overloaded by ClientMap and ServerMap to allow
		their differing fetch methods.
	*/
	virtual MapSector * emergeSector(v2s16 p){ return NULL; }
	virtual MapSector * emergeSector(v2s16 p,
			std::map<v3s16, MapBlock*> &changed_blocks){ return NULL; }

	// Returns InvalidPositionException if not found
	MapBlock * getBlockNoCreate(v3s16 p);
	// Returns NULL if not found
	MapBlock * getBlockNoCreateNoEx(v3s16 p);

	/* Server overrides */
	virtual MapBlock * emergeBlock(v3s16 p, bool create_blank=true)
	{ return getBlockNoCreateNoEx(p); }

	// Returns InvalidPositionException if not found
	bool isNodeUnderground(v3s16 p);

	bool isValidPosition(v3s16 p);

	// throws InvalidPositionException if not found
	void setNode(v3s16 p, MapNode & n);

	// Returns a CONTENT_IGNORE node if not found
	// If is_valid_position is not NULL then this will be set to true if the
	// position is valid, otherwise false
	MapNode getNodeNoEx(v3s16 p, bool *is_valid_position = NULL);

	void unspreadLight(enum LightBank bank,
			std::map<v3s16, u8> & from_nodes,
			std::set<v3s16> & light_sources,
			std::map<v3s16, MapBlock*> & modified_blocks);

	void unLightNeighbors(enum LightBank bank,
			v3s16 pos, u8 lightwas,
			std::set<v3s16> & light_sources,
			std::map<v3s16, MapBlock*> & modified_blocks);

	void spreadLight(enum LightBank bank,
			std::set<v3s16> & from_nodes,
			std::map<v3s16, MapBlock*> & modified_blocks);

	void lightNeighbors(enum LightBank bank,
			v3s16 pos,
			std::map<v3s16, MapBlock*> & modified_blocks);

	v3s16 getBrightestNeighbour(enum LightBank bank, v3s16 p);

	s16 propagateSunlight(v3s16 start,
			std::map<v3s16, MapBlock*> & modified_blocks);

	void updateLighting(enum LightBank bank,
			std::map<v3s16, MapBlock*>  & a_blocks,
			std::map<v3s16, MapBlock*> & modified_blocks);

	void updateLighting(std::map<v3s16, MapBlock*>  & a_blocks,
			std::map<v3s16, MapBlock*> & modified_blocks);

	/*
		These handle lighting but not faces.
	*/
	void addNodeAndUpdate(v3s16 p, MapNode n,
			std::map<v3s16, MapBlock*> &modified_blocks,
			bool remove_metadata = true);
	void removeNodeAndUpdate(v3s16 p,
			std::map<v3s16, MapBlock*> &modified_blocks);

	/*
		Wrappers for the latter ones.
		These emit events.
		Return true if succeeded, false if not.
	*/
	bool addNodeWithEvent(v3s16 p, MapNode n, bool remove_metadata = true);
	bool removeNodeWithEvent(v3s16 p);

	/*
		Takes the blocks at the edges into account
	*/
	bool getDayNightDiff(v3s16 blockpos);

	//core::aabbox3d<s16> getDisplayedBlockArea();

	//bool updateChangedVisibleArea();

	// Call these before and after saving of many blocks
	virtual void beginSave() { return; }
	virtual void endSave() { return; }

	virtual void save(ModifiedState save_level) { FATAL_ERROR("FIXME"); }

	// Server implements these.
	// Client leaves them as no-op.
	virtual bool saveBlock(MapBlock *block) { return false; }
	virtual bool deleteBlock(v3s16 blockpos) { return false; }

	/*
		Updates usage timers and unloads unused blocks and sectors.
		Saves modified blocks before unloading on MAPTYPE_SERVER.
	*/
	void timerUpdate(float dtime, float unload_timeout,
			std::vector<v3s16> *unloaded_blocks=NULL);

	/*
		Unloads all blocks with a zero refCount().
		Saves modified blocks before unloading on MAPTYPE_SERVER.
	*/
	void unloadUnreferencedBlocks(std::vector<v3s16> *unloaded_blocks=NULL);

	// Deletes sectors and their blocks from memory
	// Takes cache into account
	// If deleted sector is in sector cache, clears cache
	void deleteSectors(std::vector<v2s16> &list);

	// For debug printing. Prints "Map: ", "ServerMap: " or "ClientMap: "
	virtual void PrintInfo(std::ostream &out);

	void transformLiquids(std::map<v3s16, MapBlock*> & modified_blocks);

	/*
		Node metadata
		These are basically coordinate wrappers to MapBlock
	*/

	std::vector<v3s16> findNodesWithMetadata(v3s16 p1, v3s16 p2);
	NodeMetadata *getNodeMetadata(v3s16 p);

	/**
	 * Sets metadata for a node.
	 * This method sets the metadata for a given node.
	 * On success, it returns @c true and the object pointed to
	 * by @p meta is then managed by the system and should
	 * not be deleted by the caller.
	 *
	 * In case of failure, the method returns @c false and the
	 * caller is still responsible for deleting the object!
	 *
	 * @param p node coordinates
	 * @param meta pointer to @c NodeMetadata object
	 * @return @c true on success, false on failure
	 */
	bool setNodeMetadata(v3s16 p, NodeMetadata *meta);
	void removeNodeMetadata(v3s16 p);

	/*
		Node Timers
		These are basically coordinate wrappers to MapBlock
	*/

	NodeTimer getNodeTimer(v3s16 p);
	void setNodeTimer(v3s16 p, NodeTimer t);
	void removeNodeTimer(v3s16 p);

	/*
		Misc.
	*/
	std::map<v2s16, MapSector*> *getSectorsPtr(){return &m_sectors;}

	/*
		Variables
	*/