/src/mapgen/

• ../
• CMakeLists.txt
• cavegen.cpp
• cavegen.h
• dungeongen.cpp
• dungeongen.h
• mapgen.cpp
• mapgen.h
• mapgen_carpathian.cpp
• mapgen_carpathian.h
• mapgen_flat.cpp
• mapgen_flat.h
• mapgen_fractal.cpp
• mapgen_fractal.h
• mapgen_singlenode.cpp
• mapgen_singlenode.h
• mapgen_v5.cpp
• mapgen_v5.h
• mapgen_v6.cpp
• mapgen_v6.h
• mapgen_v7.cpp
• mapgen_v7.h
• mapgen_valleys.cpp
• mapgen_valleys.h
• mg_biome.cpp
• mg_biome.h
• mg_decoration.cpp
• mg_decoration.h
• mg_ore.cpp
• mg_ore.h
• mg_schematic.cpp
• mg_schematic.h
• treegen.cpp
• treegen.h

/*
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.
*/

#pragma once

#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 "util/metricsbackend.h"
#include "nodetimer.h"
#include "map_settings_manager.h"
#include "debug.h"

class Settings;
class MapDatabase;
class ClientMap;
class MapSector;
class ServerMapSector;
class MapBlock;
class NodeMetadata;
class IGameDef;
class IRollbackManager;
class EmergeManager;
class MetricsBackend;
class ServerEnvironment;
struct BlockMakeData;

/*
	MapEditEvent
*/

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 changed
	MEET_BLOCK_NODE_METADATA_CHANGED,
	// Anything else (modified_blocks are set unsent)
	MEET_OTHER
};

struct MapEditEvent
{
	MapEditEventType type = MEET_OTHER;
	v3s16 p;
	MapNode n = CONTENT_AIR;
	std::set<v3s16> modified_blocks;
	bool is_private_change = false;

	MapEditEvent() = default;

	VoxelArea getArea() const
	{
		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 (v3s16 p : modified_blocks) {
				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(const MapEditEvent &event) = 0;
};

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

	Map(IGameDef *gamedef);
	virtual ~Map();
	DISABLE_CLASS_COPY(Map);

	/*
		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(const MapEditEvent &event);

	// On failure returns NULL
	MapSector * getSectorNoGenerateNoLock(v2s16 p2d);
	// Same as the above (there exists no lock anymore)
	MapSector * getSectorNoGenerate(v2s16 p2d);

	/*
		This is overloaded by ClientMap and ServerMap to allow
		their differing fetch methods.
	*/
	virtual MapSector * emergeSector(v2s16 p){ 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); }

	inline const NodeDefManager * getNodeDefManager() { return m_nodedef; }

	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 getNode(v3s16 p, bool *is_valid_position = NULL);

	/*
		These handle lighting but not faces.
	*/
	virtual 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);

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

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

	/*
		Return true unless the map definitely cannot save blocks.
	*/
	virtual bool maySaveBlocks() { return true; }

	// 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 if possible.
	*/
	void timerUpdate(float dtime, float unload_timeout, s32 max_loaded_blocks,
			std::vector<v3s16> *unloaded_blocks=NULL);

	/*
		Unloads all blocks with a zero refCount().
		Saves modified blocks before unloading if possible.
	*/
	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);

	/*
		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(const NodeTimer &t);
	void removeNodeTimer(v3s16 p);

	/*
		Variables
	*/

	bool isBlockOccluded(MapBlock *block, v3s16 cam_pos_nodes);
protected:
	IGameDef *m_gamedef;

	std::set<MapEventReceiver*> m_event_receivers;

	std::unordered_map<v2s16, MapSector*> m_sectors;

	// Be sure to set this to NULL when the cached sector is deleted
	MapSector *m_sector_cache = nullptr;
	v2s16 m_sector_cache_p;

	// This stores the properties of the nodes on the map.
	const NodeDefManager *m_nodedef;

	// Can be implemented by child class
	virtual void reportMetrics(u64 save_time_us, u32 saved_blocks, u32 all_blocks) {}

	bool determineAdditionalOcclusionCheck(const v3s16 &pos_camera,
		const core::aabbox3d<s16> &block_bounds, v3s16 &check);
	bool isOccluded(const v3s16 &pos_camera, const v3s16 &pos_target,
		float step, float stepfac, float start_offset, float end_offset,
		u32 needed_count);
};

/*
	ServerMap

	This is the only map class that is able to generate map.
*/

class ServerMap : public Map
{
public:
	/*
		savedir: directory to which map data should be saved
	*/
	ServerMap(const std::string &savedir, IGameDef *gamedef, EmergeManager *emerge, MetricsBackend *mb);
	~ServerMap();

	/*
		Get a sector from somewhere.
		- Check memory
		- Check disk (doesn't load blocks)
		- Create blank one
	*/
	MapSector *createSector(v2s16 p);

	/*
		Blocks are generated by using these and makeBlock().
	*/
	bool blockpos_over_mapgen_limit(v3s16 p);
	bool initBlockMake(v3s16 blockpos, BlockMakeData *data);
	void finishBlockMake(BlockMakeData *data,
		std::map<v3s16, MapBlock*> *changed_blocks);

	/*
		Get a block from somewhere.
		- Memory
		- Create blank