utility.h: Change Buffer's interface to be more compatible with SharedBuffer's interf...
[oweals/minetest.git] / src / map.h
index 3b34cd899e4edbb3e75bda9c3b2dc89998021f07..c9bc817907b758b3ec6db645607f672a7fc94e6b 100644 (file)
--- a/src/map.h
+++ b/src/map.h
@@ -1,6 +1,6 @@
 /*
 Minetest-c55
-Copyright (C) 2010 celeron55, Perttu Ahola <celeron55@gmail.com>
+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
@@ -21,321 +21,159 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 #define MAP_HEADER
 
 #include <jmutex.h>
+#include <jmutexautolock.h>
 #include <jthread.h>
 #include <iostream>
-#include <malloc.h>
-
-#ifdef _WIN32
-       #include <windows.h>
-       #define sleep_s(x) Sleep((x*1000))
-#else
-       #include <unistd.h>
-       #define sleep_s(x) sleep(x)
-#endif
+#include <sstream>
 
 #include "common_irrlicht.h"
-#include "heightmap.h"
 #include "mapnode.h"
-#include "mapblock.h"
-#include "mapsector.h"
+#include "mapblock_nodemod.h"
 #include "constants.h"
 #include "voxel.h"
 
-class Map;
+extern "C" {
+       #include "sqlite3.h"
+}
 
-/*
-       A cache for short-term fast access to map data
+class MapSector;
+class ServerMapSector;
+class ClientMapSector;
+class MapBlock;
+class NodeMetadata;
 
-       NOTE: This doesn't really make anything more efficient
-       NOTE: Use VoxelManipulator, if possible
-       TODO: Get rid of this?
-       NOTE: CONFIRMED: THIS CACHE DOESN'T MAKE ANYTHING ANY FASTER
+namespace mapgen{
+       struct BlockMakeData;
+};
+
+/*
+       MapEditEvent
 */
-class MapBlockPointerCache : public NodeContainer
-{
-public:
-       MapBlockPointerCache(Map *map);
-       ~MapBlockPointerCache();
 
-       virtual u16 nodeContainerId() const
-       {
-               return NODECONTAINER_ID_MAPBLOCKCACHE;
-       }
+#define MAPTYPE_BASE 0
+#define MAPTYPE_SERVER 1
+#define MAPTYPE_CLIENT 2
 
-       MapBlock * getBlockNoCreate(v3s16 p);
+enum MapEditEventType{
+       // Node added (changed from air or something else to something)
+       MEET_ADDNODE,
+       // Node removed (changed to air)
+       MEET_REMOVENODE,
+       // 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
+};
 
-       // virtual from NodeContainer
-       bool isValidPosition(v3s16 p)
+struct MapEditEvent
+{
+       MapEditEventType type;
+       v3s16 p;
+       MapNode n;
+       core::map<v3s16, bool> modified_blocks;
+       u16 already_known_by_peer;
+
+       MapEditEvent():
+               type(MEET_OTHER),
+               already_known_by_peer(0)
        {
-               v3s16 blockpos = getNodeBlockPos(p);
-               MapBlock *blockref;
-               try{
-                       blockref = getBlockNoCreate(blockpos);
-               }
-               catch(InvalidPositionException &e)
-               {
-                       return false;
-               }
-               return true;
        }
        
-       // virtual from NodeContainer
-       MapNode getNode(v3s16 p)
-       {
-               v3s16 blockpos = getNodeBlockPos(p);
-               MapBlock * blockref = getBlockNoCreate(blockpos);
-               v3s16 relpos = p - blockpos*MAP_BLOCKSIZE;
-
-               return blockref->getNodeNoCheck(relpos);
-       }
-
-       // virtual from NodeContainer
-       void setNode(v3s16 p, MapNode & n)
+       MapEditEvent * clone()
        {
-               v3s16 blockpos = getNodeBlockPos(p);
-               MapBlock * block = getBlockNoCreate(blockpos);
-               v3s16 relpos = p - blockpos*MAP_BLOCKSIZE;
-               block->setNodeNoCheck(relpos, n);
-               m_modified_blocks[blockpos] = block;
+               MapEditEvent *event = new MapEditEvent();
+               event->type = type;
+               event->p = p;
+               event->n = n;
+               for(core::map<v3s16, bool>::Iterator
+                               i = modified_blocks.getIterator();
+                               i.atEnd()==false; i++)
+               {
+                       v3s16 p = i.getNode()->getKey();
+                       bool v = i.getNode()->getValue();
+                       event->modified_blocks.insert(p, v);
+               }
+               return event;
        }
-
-       core::map<v3s16, MapBlock*> m_modified_blocks;
-       
-private:
-       Map *m_map;
-       core::map<v3s16, MapBlock*> m_blocks;
-
-       u32 m_from_cache_count;
-       u32 m_from_map_count;
 };
 
-class CacheLock
+class MapEventReceiver
 {
 public:
-       CacheLock()
-       {
-               m_count = 0;
-               m_count_mutex.Init();
-               m_cache_mutex.Init();
-               m_waitcache_mutex.Init();
-       }
-
-       void cacheCreated()
-       {
-               //dstream<<"cacheCreated() begin"<<std::endl;
-               JMutexAutoLock waitcachelock(m_waitcache_mutex);
-               JMutexAutoLock countlock(m_count_mutex);
-
-               // If this is the first cache, grab the cache lock
-               if(m_count == 0)
-                       m_cache_mutex.Lock();
-                       
-               m_count++;
-
-               //dstream<<"cacheCreated() end"<<std::endl;
-       }
-
-       void cacheRemoved()
-       {
-               //dstream<<"cacheRemoved() begin"<<std::endl;
-               JMutexAutoLock countlock(m_count_mutex);
-
-               assert(m_count > 0);
-
-               m_count--;
-               
-               // If this is the last one, release the cache lock
-               if(m_count == 0)
-                       m_cache_mutex.Unlock();
-
-               //dstream<<"cacheRemoved() end"<<std::endl;
-       }
-
-       /*
-               This lock should be taken when removing stuff that can be
-               pointed by the cache.
-
-               You'll want to grab this in a SharedPtr.
-       */
-       JMutexAutoLock * waitCaches()
-       {
-               //dstream<<"waitCaches() begin"<<std::endl;
-               JMutexAutoLock waitcachelock(m_waitcache_mutex);
-               JMutexAutoLock *lock = new JMutexAutoLock(m_cache_mutex);
-               //dstream<<"waitCaches() end"<<std::endl;
-               return lock;
-       }
-
-private:
-       // Count of existing caches
-       u32 m_count;
-       JMutex m_count_mutex;
-       // This is locked always when there are some caches
-       JMutex m_cache_mutex;
-       // Locked so that when waitCaches() is called, no more caches are created
-       JMutex m_waitcache_mutex;
+       // event shall be deleted by caller after the call.
+       virtual void onMapEditEvent(MapEditEvent *event) = 0;
 };
 
-#define MAPTYPE_BASE 0
-#define MAPTYPE_SERVER 1
-#define MAPTYPE_CLIENT 2
-
-class Map : public NodeContainer, public Heightmappish
+class Map /*: public NodeContainer*/
 {
-protected:
-
-       std::ostream &m_dout;
-
-       core::map<v2s16, MapSector*> m_sectors;
-       JMutex m_sector_mutex;
-
-       v3f m_camera_position;
-       v3f m_camera_direction;
-       JMutex m_camera_mutex;
-
-       // Be sure to set this to NULL when the cached sector is deleted 
-       MapSector *m_sector_cache;
-       v2s16 m_sector_cache_p;
-
-       WrapperHeightmap m_hwrapper;
-
 public:
 
-       v3s16 drawoffset; // for drawbox()
-       
-       /*
-               Used by MapBlockPointerCache.
-
-               waitCaches() can be called to remove all caches before continuing
-       */
-       CacheLock m_blockcachelock;
-
        Map(std::ostream &dout);
        virtual ~Map();
 
-       virtual u16 nodeContainerId() const
+       /*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 updateCamera(v3f pos, v3f dir)
-       {
-               JMutexAutoLock lock(m_camera_mutex);
-               m_camera_position = pos;
-               m_camera_direction = dir;
-       }
-
-       /*void StartUpdater()
-       {
-               updater.Start();
-       }
-
-       void StopUpdater()
-       {
-               updater.setRun(false);
-               while(updater.IsRunning())
-                       sleep_s(1);
-       }
-
-       bool UpdaterIsRunning()
-       {
-               return updater.IsRunning();
-       }*/
-
-       static core::aabbox3d<f32> getNodeBox(v3s16 p)
-       {
-               return core::aabbox3d<f32>(
-                       (float)p.X * BS - 0.5*BS,
-                       (float)p.Y * BS - 0.5*BS,
-                       (float)p.Z * BS - 0.5*BS,
-                       (float)p.X * BS + 0.5*BS,
-                       (float)p.Y * BS + 0.5*BS,
-                       (float)p.Z * BS + 0.5*BS
-               );
-       }
+       void addEventReceiver(MapEventReceiver *event_receiver);
+       void removeEventReceiver(MapEventReceiver *event_receiver);
+       // event shall be deleted by caller after the call.
+       void dispatchEvent(MapEditEvent *event);
 
-       //bool sectorExists(v2s16 p);
+       // 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) = 0;
-       
+       virtual MapSector * emergeSector(v2s16 p){ return NULL; }
+       virtual MapSector * emergeSector(v2s16 p,
+                       core::map<v3s16, MapBlock*> &changed_blocks){ return NULL; }
+
        // Returns InvalidPositionException if not found
        MapBlock * getBlockNoCreate(v3s16 p);
-       //virtual MapBlock * getBlock(v3s16 p, bool generate=true);
+       // Returns NULL if not found
+       MapBlock * getBlockNoCreateNoEx(v3s16 p);
        
-       // Returns InvalidPositionException if not found
-       f32 getGroundHeight(v2s16 p, bool generate=false);
-       void setGroundHeight(v2s16 p, f32 y, bool generate=false);
+       /* Server overrides */
+       virtual MapBlock * emergeBlock(v3s16 p, bool allow_generate=true)
+       { return getBlockNoCreateNoEx(p); }
 
        // Returns InvalidPositionException if not found
        bool isNodeUnderground(v3s16 p);
        
-       // virtual from NodeContainer
-       bool isValidPosition(v3s16 p)
-       {
-               v3s16 blockpos = getNodeBlockPos(p);
-               MapBlock *blockref;
-               try{
-                       blockref = getBlockNoCreate(blockpos);
-               }
-               catch(InvalidPositionException &e)
-               {
-                       return false;
-               }
-               return true;
-               /*v3s16 relpos = p - blockpos*MAP_BLOCKSIZE;
-               bool is_valid = blockref->isValidPosition(relpos);
-               return is_valid;*/
-       }
+       bool isValidPosition(v3s16 p);
        
-       // virtual from NodeContainer
-       MapNode getNode(v3s16 p)
-       {
-               v3s16 blockpos = getNodeBlockPos(p);
-               MapBlock * blockref = getBlockNoCreate(blockpos);
-               v3s16 relpos = p - blockpos*MAP_BLOCKSIZE;
-
-               return blockref->getNodeNoCheck(relpos);
-       }
-
-       // virtual from NodeContainer
-       void setNode(v3s16 p, MapNode & n)
-       {
-               v3s16 blockpos = getNodeBlockPos(p);
-               MapBlock * blockref = getBlockNoCreate(blockpos);
-               v3s16 relpos = p - blockpos*MAP_BLOCKSIZE;
-               blockref->setNodeNoCheck(relpos, n);
-       }
-
-       /*MapNode getNodeGenerate(v3s16 p)
-       {
-               v3s16 blockpos = getNodeBlockPos(p);
-               MapBlock * blockref = getBlock(blockpos);
-               v3s16 relpos = p - blockpos*MAP_BLOCKSIZE;
+       // throws InvalidPositionException if not found
+       MapNode getNode(v3s16 p);
 
-               return blockref->getNode(relpos);
-       }*/
-
-       /*void setNodeGenerate(v3s16 p, MapNode & n)
-       {
-               v3s16 blockpos = getNodeBlockPos(p);
-               MapBlock * blockref = getBlock(blockpos);
-               v3s16 relpos = p - blockpos*MAP_BLOCKSIZE;
-               blockref->setNode(relpos, n);
-       }*/
+       // throws InvalidPositionException if not found
+       void setNode(v3s16 p, MapNode & n);
+       
+       // Returns a CONTENT_IGNORE node if not found
+       MapNode getNodeNoEx(v3s16 p);
 
        void unspreadLight(enum LightBank bank,
                        core::map<v3s16, u8> & from_nodes,
@@ -371,85 +209,113 @@ public:
                These handle lighting but not faces.
        */
        void addNodeAndUpdate(v3s16 p, MapNode n,
-                       core::map<v3s16, MapBlock*> &modified_blocks);
+                       core::map<v3s16, MapBlock*> &modified_blocks, std::string &player_name);
        void removeNodeAndUpdate(v3s16 p,
                        core::map<v3s16, MapBlock*> &modified_blocks);
-       
-#ifndef SERVER
-       void expireMeshes(bool only_daynight_diffed);
-       
+
        /*
-               Updates the faces of the given block and blocks on the
-               leading edge.
+               Wrappers for the latter ones.
+               These emit events.
+               Return true if succeeded, false if not.
        */
-       void updateMeshes(v3s16 blockpos, u32 daynight_ratio);
-#endif
-
+       bool addNodeWithEvent(v3s16 p, MapNode n);
+       bool removeNodeWithEvent(v3s16 p);
+       
        /*
-               Takes the blocks at the leading edges into account
+               Takes the blocks at the edges into account
        */
        bool dayNightDiffed(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(bool only_changed){assert(0);};
+       
+       // Server implements this.
+       // Client leaves it as no-op.
+       virtual void saveBlock(MapBlock *block){};
 
        /*
-               Updates usage timers
+               Updates usage timers and unloads unused blocks and sectors.
+               Saves modified blocks before unloading on MAPTYPE_SERVER.
        */
-       void timerUpdate(float dtime);
-       
+       void timerUpdate(float dtime, float unload_timeout,
+                       core::list<v3s16> *unloaded_blocks=NULL);
+               
+       // Deletes sectors and their blocks from memory
        // Takes cache into account
-       // sector mutex should be locked when calling
-       void deleteSectors(core::list<v2s16> &list, bool only_blocks);
-       
-       // Returns count of deleted sectors
-       u32 deleteUnusedSectors(float timeout, bool only_blocks=false,
+       // If deleted sector is in sector cache, clears cache
+       void deleteSectors(core::list<v2s16> &list);
+
+#if 0
+       /*
+               Unload unused data
+               = flush changed to disk and delete from memory, if usage timer of
+                 block is more than timeout
+       */
+       void unloadUnusedData(float timeout,
                        core::list<v3s16> *deleted_blocks=NULL);
+#endif
 
-       // For debug printing
+       // For debug printing. Prints "Map: ", "ServerMap: " or "ClientMap: "
        virtual void PrintInfo(std::ostream &out);
-};
+       
+       void transformLiquids(core::map<v3s16, MapBlock*> & modified_blocks);
 
-// Master heightmap parameters
-struct HMParams
-{
-       HMParams()
-       {
-               blocksize = 64;
-               randmax = "constant 70.0";
-               randfactor = "constant 0.6";
-               base = "linear 0 80 0";
-       }
-       s16 blocksize;
-       std::string randmax;
-       std::string randfactor;
-       std::string base;
-};
+       /*
+               Node metadata
+               These are basically coordinate wrappers to MapBlock
+       */
+       
+       NodeMetadata* getNodeMetadata(v3s16 p);
+       void setNodeMetadata(v3s16 p, NodeMetadata *meta);
+       void removeNodeMetadata(v3s16 p);
+       void nodeMetadataStep(float dtime,
+                       core::map<v3s16, MapBlock*> &changed_blocks);
+       
+       /*
+               Misc.
+       */
+       core::map<v2s16, MapSector*> *getSectorsPtr(){return &m_sectors;}
 
-// Map parameters
-struct MapParams
-{
-       MapParams()
-       {
-               plants_amount = 1.0;
-               ravines_amount = 1.0;
-               //max_objects_in_block = 30;
-       }
-       float plants_amount;
-       float ravines_amount;
-       //u16 max_objects_in_block;
+       /*
+               Variables
+       */
+       
+protected:
+
+       std::ostream &m_dout;
+
+       core::map<MapEventReceiver*, bool> m_event_receivers;
+       
+       core::map<v2s16, MapSector*> m_sectors;
+
+       // Be sure to set this to NULL when the cached sector is deleted 
+       MapSector *m_sector_cache;
+       v2s16 m_sector_cache_p;
+
+       // Queued transforming water nodes
+       UniqueQueue<v3s16> m_transforming_liquid;
 };
 
+/*
+       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(std::string savedir, HMParams hmp, MapParams mp);
+       ServerMap(std::string savedir);
        ~ServerMap();
 
        s32 mapType() const
@@ -458,58 +324,94 @@ public:
        }
 
        /*
-               Forcefully get a sector from somewhere
+               Get a sector from somewhere.
+               - Check memory
+               - Check disk (doesn't load blocks)
+               - Create blank one
        */
-       MapSector * emergeSector(v2s16 p);
-       /*
-               Forcefully get a block from somewhere.
+       ServerMapSector * createSector(v2s16 p);
 
-               Exceptions:
-               - InvalidPositionException: possible if only_from_disk==true
-               
-               changed_blocks:
-               - All already existing blocks that were modified are added.
-                       - If found on disk, nothing will be added.
-                       - If generated, the new block will not be included.
-
-               lighting_invalidated_blocks:
-               - All blocks that have heavy-to-calculate lighting changes
-                 are added.
-                       - updateLighting() should be called for these.
-               
-               - A block that is in changed_blocks may not be in
-                 lighting_invalidated_blocks.
+       /*
+               Blocks are generated by using these and makeBlock().
        */
-       MapBlock * emergeBlock(
+       void initBlockMake(mapgen::BlockMakeData *data, v3s16 blockpos);
+       MapBlock* finishBlockMake(mapgen::BlockMakeData *data,
+                       core::map<v3s16, MapBlock*> &changed_blocks);
+       
+       // A non-threaded wrapper to the above
+       MapBlock * generateBlock(
                        v3s16 p,
-                       bool only_from_disk,
-                       core::map<v3s16, MapBlock*> &changed_blocks,
-                       core::map<v3s16, MapBlock*> &lighting_invalidated_blocks
+                       core::map<v3s16, MapBlock*> &modified_blocks
        );
+       
+       /*
+               Get a block from somewhere.
+               - Memory
+               - Create blank
+       */
+       MapBlock * createBlock(v3s16 p);
+
+       /*
+               Forcefully get a block from somewhere.
+               - Memory
+               - Load from disk
+               - Generate
+       */
+       MapBlock * emergeBlock(v3s16 p, bool allow_generate=true);
+       
+       // Helper for placing objects on ground level
+       s16 findGroundLevel(v2s16 p2d);
 
-       void createDir(std::string path);
-       void createSaveDir();
-       // returns something like "xxxxxxxx"
-       std::string getSectorSubDir(v2s16 pos);
+       /*
+               Misc. helper functions for fiddling with directory and file
+               names when saving
+       */
+       void createDirs(std::string path);
        // returns something like "map/sectors/xxxxxxxx"
-       std::string getSectorDir(v2s16 pos);
-       std::string createSectorDir(v2s16 pos);
+       std::string getSectorDir(v2s16 pos, int layout = 2);
        // dirname: final directory name
        v2s16 getSectorPos(std::string dirname);
        v3s16 getBlockPos(std::string sectordir, std::string blockfile);
+       static std::string getBlockFilename(v3s16 p);
 
-       void save(bool only_changed);
-       void loadAll();
+       /*
+               Database functions
+       */
+       // Create the database structure
+       void createDatabase();
+       // Verify we can read/write to the database
+       void verifyDatabase();
+       // Get an integer suitable for a block
+       static sqlite3_int64 getBlockAsInteger(const v3s16 pos);
+       static v3s16 getIntegerAsBlock(sqlite3_int64 i);
 
-       void saveMasterHeightmap();
-       void loadMasterHeightmap();
+       // Returns true if the database file does not exist
+       bool loadFromFolders();
 
+       // Call these before and after saving of blocks
+       void beginSave();
+       void endSave();
+
+       void save(bool only_changed);
+       //void loadAll();
+       
+       void listAllLoadableBlocks(core::list<v3s16> &dst);
+       
+       // Saves map seed and possibly other stuff
+       void saveMapMeta();
+       void loadMapMeta();
+       
+       /*void saveChunkMeta();
+       void loadChunkMeta();*/
+       
        // The sector mutex should be locked when calling most of these
        
        // This only saves sector-specific data such as the heightmap
        // (no MapBlocks)
+       // DEPRECATED? Sectors have no metadata anymore.
        void saveSectorMeta(ServerMapSector *sector);
-       MapSector* loadSectorMeta(std::string dirname);
+       MapSector* loadSectorMeta(std::string dirname, bool save_after_load);
+       bool loadSectorMeta(v2s16 p2d);
        
        // Full load of a sector including all blocks.
        // returns true on success, false on failure.
@@ -520,34 +422,93 @@ public:
        
        void saveBlock(MapBlock *block);
        // This will generate a sector with getSector if not found.
-       void loadBlock(std::string sectordir, std::string blockfile, MapSector *sector);
-
-       // Gets from master heightmap
-       void getSectorCorners(v2s16 p2d, s16 *corners);
+       void loadBlock(std::string sectordir, std::string blockfile, MapSector *sector, bool save_after_load=false);
+       MapBlock* loadBlock(v3s16 p);
+       // Database version
+       void loadBlock(std::string *blob, v3s16 p3d, MapSector *sector, bool save_after_load=false);
 
        // For debug printing
        virtual void PrintInfo(std::ostream &out);
 
+       bool isSavingEnabled(){ return m_map_saving_enabled; }
+
+       u64 getSeed(){ return m_seed; }
+
 private:
-       UnlimitedHeightmap *m_heightmap;
-       MapParams m_params;
+       // Seed used for all kinds of randomness
+       u64 m_seed;
 
        std::string m_savedir;
        bool m_map_saving_enabled;
+
+#if 0
+       // Chunk size in MapSectors
+       // If 0, chunks are disabled.
+       s16 m_chunksize;
+       // Chunks
+       core::map<v2s16, MapChunk*> m_chunks;
+#endif
+
+       /*
+               Metadata is re-written on disk only if this is true.
+               This is reset to false when written on disk.
+       */
+       bool m_map_metadata_changed;
+       
+       /*
+               SQLite database and statements
+       */
+       sqlite3 *m_database;
+       sqlite3_stmt *m_database_read;
+       sqlite3_stmt *m_database_write;
+       sqlite3_stmt *m_database_list;
 };
 
+/*
+       ClientMap stuff
+*/
+
 #ifndef SERVER
 
+struct MapDrawControl
+{
+       MapDrawControl():
+               range_all(false),
+               wanted_range(50),
+               wanted_max_blocks(0),
+               wanted_min_range(0),
+               blocks_drawn(0),
+               blocks_would_have_drawn(0)
+       {
+       }
+       // Overrides limits by drawing everything
+       bool range_all;
+       // Wanted drawing range
+       float wanted_range;
+       // Maximum number of blocks to draw
+       u32 wanted_max_blocks;
+       // Blocks in this range are drawn regardless of number of blocks drawn
+       float wanted_min_range;
+       // Number of blocks rendered is written here by the renderer
+       u32 blocks_drawn;
+       // Number of blocks that would have been drawn in wanted_range
+       u32 blocks_would_have_drawn;
+};
+
 class Client;
 
+/*
+       ClientMap
+       
+       This is the only map class that is able to render itself on screen.
+*/
+
 class ClientMap : public Map, public scene::ISceneNode
 {
 public:
        ClientMap(
                        Client *client,
-                       JMutex &range_mutex,
-                       s16 &viewing_range_nodes,
-                       bool &viewing_range_all,
+                       MapDrawControl &control,
                        scene::ISceneNode* parent,
                        scene::ISceneManager* mgr,
                        s32 id
@@ -565,12 +526,20 @@ public:
                ISceneNode::drop();
        }
 
+       void updateCamera(v3f pos, v3f dir, f32 fov)
+       {
+               JMutexAutoLock lock(m_camera_mutex);
+               m_camera_position = pos;
+               m_camera_direction = dir;
+               m_camera_fov = fov;
+       }
+
        /*
                Forcefully get a sector from somewhere
        */
        MapSector * emergeSector(v2s16 p);
 
-       void deSerializeSector(v2s16 p2d, std::istream &is);
+       //void deSerializeSector(v2s16 p2d, std::istream &is);
 
        /*
                ISceneNode methods
@@ -592,31 +561,61 @@ public:
 
        void renderMap(video::IVideoDriver* driver, s32 pass);
 
+       void renderPostFx();
+
        /*
                Methods for setting temporary modifications to nodes for
                drawing.
-               Return value is position of changed block.
+
+               Returns true if something changed.
+               
+               All blocks whose mesh could have been changed are inserted
+               to affected_blocks.
        */
-       v3s16 setTempMod(v3s16 p, NodeMod mod);
-       v3s16 clearTempMod(v3s16 p);
+       bool setTempMod(v3s16 p, NodeMod mod,
+                       core::map<v3s16, MapBlock*> *affected_blocks=NULL);
+       bool clearTempMod(v3s16 p,
+                       core::map<v3s16, MapBlock*> *affected_blocks=NULL);
        // Efficient implementation needs a cache of TempMods
        //void clearTempMods();
 
+       void expireMeshes(bool only_daynight_diffed);
+       
+       /*
+               Update the faces of the given block and blocks on the
+               leading edge.
+       */
+       void updateMeshes(v3s16 blockpos, u32 daynight_ratio);
+       
+       // Update meshes that touch the node
+       //void updateNodeMeshes(v3s16 nodepos, u32 daynight_ratio);
+
        // For debug printing
        virtual void PrintInfo(std::ostream &out);
        
+       // Check if sector was drawn on last render()
+       bool sectorWasDrawn(v2s16 p)
+       {
+               return (m_last_drawn_sectors.find(p) != NULL);
+       }
+       
 private:
        Client *m_client;
        
        core::aabbox3d<f32> m_box;
        
        // This is the master heightmap mesh
-       scene::SMesh *mesh;
-       JMutex mesh_mutex;
+       //scene::SMesh *mesh;
+       //JMutex mesh_mutex;
+       
+       MapDrawControl &m_control;
 
-       JMutex &m_range_mutex;
-       s16 &m_viewing_range_nodes;
-       bool &m_viewing_range_all;
+       v3f m_camera_position;
+       v3f m_camera_direction;
+       f32 m_camera_fov;
+       JMutex m_camera_mutex;
+       
+       core::map<v2s16, bool> m_last_drawn_sectors;
 };
 
 #endif
@@ -637,16 +636,34 @@ public:
 
        void blitBack(core::map<v3s16, MapBlock*> & modified_blocks);
 
-private:
+protected:
        Map *m_map;
        /*
-               NOTE: This might be used or not
-               bool is dummy value
-               SUGG: How 'bout an another VoxelManipulator for storing the
-                     information about which block is loaded?
+               key = blockpos
+               value = block existed when loaded
        */
        core::map<v3s16, bool> m_loaded_blocks;
 };
 
+class ManualMapVoxelManipulator : public MapVoxelManipulator
+{
+public:
+       ManualMapVoxelManipulator(Map *map);
+       virtual ~ManualMapVoxelManipulator();
+
+       void setMap(Map *map)
+       {m_map = map;}
+       
+       virtual void emerge(VoxelArea a, s32 caller_id=-1);
+
+       void initialEmerge(v3s16 blockpos_min, v3s16 blockpos_max);
+       
+       // This is much faster with big chunks of generated data
+       void blitBackAll(core::map<v3s16, MapBlock*> * modified_blocks);
+
+protected:
+       bool m_create_area;
+};
+
 #endif