]> git.lizzy.rs Git - dragonfireclient.git/blobdiff - src/server.cpp
commit before some more radical changes
[dragonfireclient.git] / src / server.cpp
index 2f285b6e959eb0953f694bd38c65cf8e205e3428..b3ce9c13aeeef720b876219bf11227d0516b75dd 100644 (file)
@@ -17,10 +17,6 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */
 
-/*
-(c) 2010 Perttu Ahola <celeron55@gmail.com>
-*/
-
 #include "server.h"
 #include "utility.h"
 #include <iostream>
@@ -31,6 +27,7 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 #include "constants.h"
 #include "voxel.h"
 #include "materials.h"
+#include "mineral.h"
 
 #define BLOCK_EMERGE_FLAG_FROMDISK (1<<0)
 
@@ -45,7 +42,12 @@ void * ServerThread::Thread()
        while(getRun())
        {
                try{
-                       m_server->AsyncRunStep();
+                       //TimeTaker timer("AsyncRunStep() + Receive()");
+
+                       {
+                               //TimeTaker timer("AsyncRunStep()");
+                               m_server->AsyncRunStep();
+                       }
                
                        //dout_server<<"Running m_server->Receive()"<<std::endl;
                        m_server->Receive();
@@ -53,6 +55,10 @@ void * ServerThread::Thread()
                catch(con::NoIncomingDataException &e)
                {
                }
+               catch(con::PeerNotFoundException &e)
+               {
+                       dout_server<<"Server: PeerNotFoundException"<<std::endl;
+               }
        }
        
        END_DEBUG_EXCEPTION_HANDLER
@@ -149,18 +155,53 @@ void * EmergeThread::Thread()
                        
                        if(optional)
                                only_from_disk = true;
-
-                       block = map.emergeBlock(
-                                       p,
-                                       only_from_disk,
-                                       changed_blocks,
-                                       lighting_invalidated_blocks);
                        
+                       // First check if the block already exists
+                       //block = map.getBlockNoCreate(p);
+
+                       if(block == NULL)
+                       {
+                               //dstream<<"Calling emergeBlock"<<std::endl;
+                               block = map.emergeBlock(
+                                               p,
+                                               only_from_disk,
+                                               changed_blocks,
+                                               lighting_invalidated_blocks);
+
+#if 0
+                               /*
+                                       While we're at it, generate some other blocks too
+                               */
+                               try
+                               {
+                                       map.emergeBlock(
+                                                       p+v3s16(0,1,0),
+                                                       only_from_disk,
+                                                       changed_blocks,
+                                                       lighting_invalidated_blocks);
+                                       map.emergeBlock(
+                                                       p+v3s16(0,-1,0),
+                                                       only_from_disk,
+                                                       changed_blocks,
+                                                       lighting_invalidated_blocks);
+                               }
+                               catch(InvalidPositionException &e)
+                               {
+                               }
+#endif
+                       }
+
                        // If it is a dummy, block was not found on disk
                        if(block->isDummy())
                        {
                                //dstream<<"EmergeThread: Got a dummy block"<<std::endl;
                                got_block = false;
+
+                               if(only_from_disk == false)
+                               {
+                                       dstream<<"EmergeThread: wanted to generate a block but got a dummy"<<std::endl;
+                                       assert(0);
+                               }
                        }
                }
                catch(InvalidPositionException &e)
@@ -185,42 +226,31 @@ void * EmergeThread::Thread()
                                dout_server<<std::endl;
                        }
 
-                       /*
-                               Update water pressure
-                       */
-
-                       m_server->UpdateBlockWaterPressure(block, modified_blocks);
-
-                       for(core::map<v3s16, MapBlock*>::Iterator i = changed_blocks.getIterator();
-                                       i.atEnd() == false; i++)
-                       {
-                               MapBlock *block = i.getNode()->getValue();
-                               m_server->UpdateBlockWaterPressure(block, modified_blocks);
-                               //v3s16 p = i.getNode()->getKey();
-                               //m_server->UpdateBlockWaterPressure(p, modified_blocks);
-                       }
-
                        /*
                                Collect a list of blocks that have been modified in
                                addition to the fetched one.
                        */
-
-                       // Add all the "changed blocks" to modified_blocks
+                       
+                       if(lighting_invalidated_blocks.size() > 0)
+                       {
+                               /*dstream<<"lighting "<<lighting_invalidated_blocks.size()
+                                               <<" blocks"<<std::endl;*/
+                       
+                               // 50-100ms for single block generation
+                               //TimeTaker timer("** EmergeThread updateLighting");
+                               
+                               // Update lighting without locking the environment mutex,
+                               // add modified blocks to changed blocks
+                               map.updateLighting(lighting_invalidated_blocks, modified_blocks);
+                       }
+                               
+                       // Add all from changed_blocks to modified_blocks
                        for(core::map<v3s16, MapBlock*>::Iterator i = changed_blocks.getIterator();
                                        i.atEnd() == false; i++)
                        {
                                MapBlock *block = i.getNode()->getValue();
                                modified_blocks.insert(block->getPos(), block);
                        }
-                       
-                       /*dstream<<"lighting "<<lighting_invalidated_blocks.size()
-                                       <<" blocks"<<std::endl;*/
-                       
-                       //TimeTaker timer("** updateLighting", g_device);
-                       
-                       // Update lighting without locking the environment mutex,
-                       // add modified blocks to changed blocks
-                       map.updateLighting(lighting_invalidated_blocks, modified_blocks);
                }
                // If we got no block, there should be no invalidated blocks
                else
@@ -275,21 +305,14 @@ void RemoteClient::GetNextBlocks(Server *server, float dtime,
        DSTACK(__FUNCTION_NAME);
        
        // Increment timers
-       {
-               JMutexAutoLock lock(m_blocks_sent_mutex);
-               m_nearest_unsent_reset_timer += dtime;
-       }
+       m_nearest_unsent_reset_timer += dtime;
 
        // Won't send anything if already sending
+       if(m_blocks_sending.size() >= g_settings.getU16
+                       ("max_simultaneous_block_sends_per_client"))
        {
-               JMutexAutoLock lock(m_blocks_sending_mutex);
-               
-               if(m_blocks_sending.size() >= g_settings.getU16
-                               ("max_simultaneous_block_sends_per_client"))
-               {
-                       //dstream<<"Not sending any blocks, Queue full."<<std::endl;
-                       return;
-               }
+               //dstream<<"Not sending any blocks, Queue full."<<std::endl;
+               return;
        }
 
        Player *player = server->m_env.getPlayer(peer_id);
@@ -299,38 +322,42 @@ void RemoteClient::GetNextBlocks(Server *server, float dtime,
        v3f playerpos = player->getPosition();
        v3f playerspeed = player->getSpeed();
 
-       v3s16 center_nodepos = floatToInt(playerpos);
+       v3s16 center_nodepos = floatToInt(playerpos, BS);
 
        v3s16 center = getNodeBlockPos(center_nodepos);
+       
+       // Camera position and direction
+       v3f camera_pos =
+                       playerpos + v3f(0, BS+BS/2, 0);
+       v3f camera_dir = v3f(0,0,1);
+       camera_dir.rotateYZBy(player->getPitch());
+       camera_dir.rotateXZBy(player->getYaw());
 
        /*
                Get the starting value of the block finder radius.
        */
        s16 last_nearest_unsent_d;
        s16 d_start;
-       {
-               JMutexAutoLock lock(m_blocks_sent_mutex);
                
-               if(m_last_center != center)
-               {
-                       m_nearest_unsent_d = 0;
-                       m_last_center = center;
-               }
-
-               /*dstream<<"m_nearest_unsent_reset_timer="
-                               <<m_nearest_unsent_reset_timer<<std::endl;*/
-               if(m_nearest_unsent_reset_timer > 5.0)
-               {
-                       m_nearest_unsent_reset_timer = 0;
-                       m_nearest_unsent_d = 0;
-                       //dstream<<"Resetting m_nearest_unsent_d"<<std::endl;
-               }
+       if(m_last_center != center)
+       {
+               m_nearest_unsent_d = 0;
+               m_last_center = center;
+       }
 
-               last_nearest_unsent_d = m_nearest_unsent_d;
-               
-               d_start = m_nearest_unsent_d;
+       /*dstream<<"m_nearest_unsent_reset_timer="
+                       <<m_nearest_unsent_reset_timer<<std::endl;*/
+       if(m_nearest_unsent_reset_timer > 5.0)
+       {
+               m_nearest_unsent_reset_timer = 0;
+               m_nearest_unsent_d = 0;
+               //dstream<<"Resetting m_nearest_unsent_d"<<std::endl;
        }
 
+       last_nearest_unsent_d = m_nearest_unsent_d;
+       
+       d_start = m_nearest_unsent_d;
+
        u16 maximum_simultaneous_block_sends_setting = g_settings.getU16
                        ("max_simultaneous_block_sends_per_client");
        u16 maximum_simultaneous_block_sends = 
@@ -341,24 +368,15 @@ void RemoteClient::GetNextBlocks(Server *server, float dtime,
                
                Decrease send rate if player is building stuff.
        */
+       m_time_from_building += dtime;
+       if(m_time_from_building < g_settings.getFloat(
+                               "full_block_send_enable_min_time_from_building"))
        {
-               SharedPtr<JMutexAutoLock> lock(m_time_from_building.getLock());
-               m_time_from_building.m_value += dtime;
-               /*if(m_time_from_building.m_value
-                               < FULL_BLOCK_SEND_ENABLE_MIN_TIME_FROM_BUILDING)*/
-               if(m_time_from_building.m_value < g_settings.getFloat(
-                                       "full_block_send_enable_min_time_from_building"))
-               {
-                       maximum_simultaneous_block_sends
-                               = LIMITED_MAX_SIMULTANEOUS_BLOCK_SENDS;
-               }
+               maximum_simultaneous_block_sends
+                       = LIMITED_MAX_SIMULTANEOUS_BLOCK_SENDS;
        }
        
-       u32 num_blocks_selected;
-       {
-               JMutexAutoLock lock(m_blocks_sending_mutex);
-               num_blocks_selected = m_blocks_sending.size();
-       }
+       u32 num_blocks_selected = m_blocks_sending.size();
        
        /*
                next time d will be continued from the d from which the nearest
@@ -369,11 +387,6 @@ void RemoteClient::GetNextBlocks(Server *server, float dtime,
        */
        s32 new_nearest_unsent_d = -1;
 
-       // Serialization version used
-       //u8 ser_version = serialization_version;
-
-       //bool has_incomplete_blocks = false;
-       
        s16 d_max = g_settings.getS16("max_block_send_distance");
        s16 d_max_gen = g_settings.getS16("max_block_generate_distance");
        
@@ -383,20 +396,16 @@ void RemoteClient::GetNextBlocks(Server *server, float dtime,
        {
                //dstream<<"RemoteClient::SendBlocks(): d="<<d<<std::endl;
                
-               //if(has_incomplete_blocks == false)
+               /*
+                       If m_nearest_unsent_d was changed by the EmergeThread
+                       (it can change it to 0 through SetBlockNotSent),
+                       update our d to it.
+                       Else update m_nearest_unsent_d
+               */
+               if(m_nearest_unsent_d != last_nearest_unsent_d)
                {
-                       JMutexAutoLock lock(m_blocks_sent_mutex);
-                       /*
-                               If m_nearest_unsent_d was changed by the EmergeThread
-                               (it can change it to 0 through SetBlockNotSent),
-                               update our d to it.
-                               Else update m_nearest_unsent_d
-                       */
-                       if(m_nearest_unsent_d != last_nearest_unsent_d)
-                       {
-                               d = m_nearest_unsent_d;
-                               last_nearest_unsent_d = m_nearest_unsent_d;
-                       }
+                       d = m_nearest_unsent_d;
+                       last_nearest_unsent_d = m_nearest_unsent_d;
                }
 
                /*
@@ -428,23 +437,19 @@ void RemoteClient::GetNextBlocks(Server *server, float dtime,
                                                maximum_simultaneous_block_sends_setting;
                        }
 
+                       // Limit is dynamically lowered when building
+                       if(num_blocks_selected
+                                       >= maximum_simultaneous_block_sends_now)
                        {
-                               JMutexAutoLock lock(m_blocks_sending_mutex);
-                               
-                               // Limit is dynamically lowered when building
-                               if(num_blocks_selected
-                                               >= maximum_simultaneous_block_sends_now)
-                               {
-                                       /*dstream<<"Not sending more blocks. Queue full. "
-                                                       <<m_blocks_sending.size()
-                                                       <<std::endl;*/
-                                       goto queue_full;
-                               }
-
-                               if(m_blocks_sending.find(p) != NULL)
-                                       continue;
+                               /*dstream<<"Not sending more blocks. Queue full. "
+                                               <<m_blocks_sending.size()
+                                               <<std::endl;*/
+                               goto queue_full;
                        }
-                       
+
+                       if(m_blocks_sending.find(p) != NULL)
+                               continue;
+               
                        /*
                                Do not go over-limit
                        */
@@ -455,48 +460,100 @@ void RemoteClient::GetNextBlocks(Server *server, float dtime,
                        || p.Z < -MAP_GENERATION_LIMIT / MAP_BLOCKSIZE
                        || p.Z > MAP_GENERATION_LIMIT / MAP_BLOCKSIZE)
                                continue;
-
-                       bool generate = d <= d_max_gen;
                
-                       // Limit the generating area vertically to 2/3
-                       if(abs(p.Y - center.Y) > d_max_gen - d_max_gen / 3)
-                               generate = false;
+                       // If this is true, inexistent block will be made from scratch
+                       bool generate = d <= d_max_gen;
                        
+                       {
+                               /*// Limit the generating area vertically to 2/3
+                               if(abs(p.Y - center.Y) > d_max_gen - d_max_gen / 3)
+                                       generate = false;*/
+
+                               // Limit the send area vertically to 2/3
+                               if(abs(p.Y - center.Y) > d_max_gen - d_max_gen / 3)
+                                       continue;
+                       }
+
+#if 0
                        /*
-                               Don't send already sent blocks
+                               If block is far away, don't generate it unless it is
+                               near ground level
+
+                               NOTE: We can't know the ground level this way with the
+                               new generator.
                        */
+                       if(d > 4)
                        {
-                               JMutexAutoLock lock(m_blocks_sent_mutex);
-                               
-                               if(m_blocks_sent.find(p) != NULL)
-                                       continue;
+                               v2s16 p2d(p.X, p.Z);
+                               MapSector *sector = NULL;
+                               try
+                               {
+                                       sector = server->m_env.getMap().getSectorNoGenerate(p2d);
+                               }
+                               catch(InvalidPositionException &e)
+                               {
+                               }
+
+                               if(sector != NULL)
+                               {
+                                       // Get center ground height in nodes
+                                       f32 gh = sector->getGroundHeight(
+                                                       v2s16(MAP_BLOCKSIZE/2, MAP_BLOCKSIZE/2));
+                                       // Block center y in nodes
+                                       f32 y = (f32)(p.Y * MAP_BLOCKSIZE + MAP_BLOCKSIZE/2);
+                                       // If differs a lot, don't generate
+                                       if(fabs(gh - y) > MAP_BLOCKSIZE*2)
+                                               generate = false;
+                               }
                        }
+#endif
 
                        /*
-                               Check if map has this block
+                               Don't generate or send if not in sight
                        */
-                       MapBlock *block = NULL;
-                       try
+
+                       if(isBlockInSight(p, camera_pos, camera_dir, 10000*BS) == false)
                        {
-                               block = server->m_env.getMap().getBlockNoCreate(p);
+                               continue;
                        }
-                       catch(InvalidPositionException &e)
+                       
+                       /*
+                               Don't send already sent blocks
+                       */
                        {
+                               if(m_blocks_sent.find(p) != NULL)
+                                       continue;
                        }
+
+                       /*
+                               Check if map has this block
+                       */
+                       MapBlock *block = server->m_env.getMap().getBlockNoCreateNoEx(p);
                        
                        bool surely_not_found_on_disk = false;
+                       bool block_is_invalid = false;
                        if(block != NULL)
                        {
-                               /*if(block->isIncomplete())
-                               {
-                                       has_incomplete_blocks = true;
-                                       continue;
-                               }*/
-
                                if(block->isDummy())
                                {
                                        surely_not_found_on_disk = true;
                                }
+
+                               if(block->isValid() == false)
+                               {
+                                       block_is_invalid = true;
+                               }
+                               
+                               /*if(block->isFullyGenerated() == false)
+                               {
+                                       block_is_invalid = true;
+                               }*/
+                               
+                               v2s16 p2d(p.X, p.Z);
+                               ServerMap *map = (ServerMap*)(&server->m_env.getMap());
+                               v2s16 chunkpos = map->sector_to_chunk(p2d);
+                               if(map->chunkNonVolatile(chunkpos) == false)
+                                       block_is_invalid = true;
                        }
 
                        /*
@@ -521,15 +578,15 @@ void RemoteClient::GetNextBlocks(Server *server, float dtime,
                        /*
                                Add inexistent block to emerge queue.
                        */
-                       if(block == NULL || surely_not_found_on_disk)
+                       if(block == NULL || surely_not_found_on_disk || block_is_invalid)
                        {
-                               /*SharedPtr<JMutexAutoLock> lock
-                                               (m_num_blocks_in_emerge_queue.getLock());*/
-                               
                                //TODO: Get value from somewhere
                                // Allow only one block in emerge queue
-                               if(server->m_emerge_queue.peerItemCount(peer_id) < 1)
+                               //if(server->m_emerge_queue.peerItemCount(peer_id) < 1)
+                               if(server->m_emerge_queue.peerItemCount(peer_id) < 2)
                                {
+                                       //dstream<<"Adding block to emerge queue"<<std::endl;
+                                       
                                        // Add it to the emerge queue and trigger the thread
                                        
                                        u8 flags = 0;
@@ -545,7 +602,7 @@ void RemoteClient::GetNextBlocks(Server *server, float dtime,
                        }
 
                        /*
-                               Add block to queue
+                               Add block to send queue
                        */
 
                        PrioritySortedBlockTransfer q((float)d, p, peer_id);
@@ -559,7 +616,6 @@ void RemoteClient::GetNextBlocks(Server *server, float dtime,
 
        if(new_nearest_unsent_d != -1)
        {
-               JMutexAutoLock lock(m_blocks_sent_mutex);
                m_nearest_unsent_d = new_nearest_unsent_d;
        }
 }
@@ -664,7 +720,7 @@ void RemoteClient::SendObjectData(
        v3f playerpos = player->getPosition();
        v3f playerspeed = player->getSpeed();
 
-       v3s16 center_nodepos = floatToInt(playerpos);
+       v3s16 center_nodepos = floatToInt(playerpos, BS);
        v3s16 center = getNodeBlockPos(center_nodepos);
 
        s16 d_max = g_settings.getS16("active_object_range");
@@ -688,7 +744,6 @@ void RemoteClient::SendObjectData(
                                Ignore blocks that haven't been sent to the client
                        */
                        {
-                               JMutexAutoLock sentlock(m_blocks_sent_mutex);
                                if(m_blocks_sent.find(p) == NULL)
                                        continue;
                        }
@@ -782,25 +837,19 @@ void RemoteClient::SendObjectData(
 
 void RemoteClient::GotBlock(v3s16 p)
 {
-       JMutexAutoLock lock(m_blocks_sending_mutex);
-       JMutexAutoLock lock2(m_blocks_sent_mutex);
        if(m_blocks_sending.find(p) != NULL)
                m_blocks_sending.remove(p);
        else
-               dstream<<"RemoteClient::GotBlock(): Didn't find in"
-                               " m_blocks_sending"<<std::endl;
+       {
+               /*dstream<<"RemoteClient::GotBlock(): Didn't find in"
+                               " m_blocks_sending"<<std::endl;*/
+               m_excess_gotblocks++;
+       }
        m_blocks_sent.insert(p, true);
 }
 
 void RemoteClient::SentBlock(v3s16 p)
 {
-       JMutexAutoLock lock(m_blocks_sending_mutex);
-       if(m_blocks_sending.size() > 15)
-       {
-               dstream<<"RemoteClient::SentBlock(): "
-                               <<"m_blocks_sending.size()="
-                               <<m_blocks_sending.size()<<std::endl;
-       }
        if(m_blocks_sending.find(p) == NULL)
                m_blocks_sending.insert(p, 0.0);
        else
@@ -810,9 +859,6 @@ void RemoteClient::SentBlock(v3s16 p)
 
 void RemoteClient::SetBlockNotSent(v3s16 p)
 {
-       JMutexAutoLock sendinglock(m_blocks_sending_mutex);
-       JMutexAutoLock sentlock(m_blocks_sent_mutex);
-
        m_nearest_unsent_d = 0;
        
        if(m_blocks_sending.find(p) != NULL)
@@ -823,9 +869,6 @@ void RemoteClient::SetBlockNotSent(v3s16 p)
 
 void RemoteClient::SetBlocksNotSent(core::map<v3s16, MapBlock*> &blocks)
 {
-       JMutexAutoLock sendinglock(m_blocks_sending_mutex);
-       JMutexAutoLock sentlock(m_blocks_sent_mutex);
-
        m_nearest_unsent_d = 0;
        
        for(core::map<v3s16, MapBlock*>::Iterator
@@ -854,8 +897,8 @@ void PlayerInfo::PrintLine(std::ostream *s)
 {
        (*s)<<id<<": ";
        (*s)<<"\""<<name<<"\" ("
-                       <<position.X<<","<<position.Y
-                       <<","<<position.Z<<") ";
+                       <<(position.X/10)<<","<<(position.Y/10)
+                       <<","<<(position.Z/10)<<") ";
        address.print(s);
        (*s)<<" avg_rtt="<<avg_rtt;
        (*s)<<std::endl;
@@ -880,20 +923,22 @@ u32 PIChecksum(core::list<PlayerInfo> &l)
 */
 
 Server::Server(
-               std::string mapsavedir,
-               HMParams hm_params,
-               MapParams map_params
+               std::string mapsavedir
        ):
-       m_env(new ServerMap(mapsavedir, hm_params, map_params), dout_server),
+       m_env(new ServerMap(mapsavedir), this),
        m_con(PROTOCOL_ID, 512, CONNECTION_TIMEOUT, this),
        m_thread(this),
        m_emergethread(this),
        m_time_of_day(9000),
        m_time_counter(0),
        m_time_of_day_send_timer(0),
-       m_uptime(0)
+       m_uptime(0),
+       m_mapsavedir(mapsavedir),
+       m_shutdown_requested(false),
+       m_ignore_map_edit_events(false),
+       m_ignore_map_edit_events_peer_id(0)
 {
-       m_flowwater_timer = 0.0;
+       m_liquid_transform_timer = 0.0;
        m_print_info_timer = 0.0;
        m_objectdata_timer = 0.0;
        m_emergethread_trigger_timer = 0.0;
@@ -903,29 +948,71 @@ Server::Server(
        m_con_mutex.Init();
        m_step_dtime_mutex.Init();
        m_step_dtime = 0.0;
+
+       m_env.getMap().addEventReceiver(this);
+
+       // Load players
+       m_env.deSerializePlayers(m_mapsavedir);
 }
 
 Server::~Server()
 {
-       // Stop threads
-       stop();
+       /*
+               Send shutdown message
+       */
+       {
+               JMutexAutoLock conlock(m_con_mutex);
+               
+               std::wstring line = L"*** Server shutting down";
+
+               /*
+                       Send the message to clients
+               */
+               for(core::map<u16, RemoteClient*>::Iterator
+                       i = m_clients.getIterator();
+                       i.atEnd() == false; i++)
+               {
+                       // Get client and check that it is valid
+                       RemoteClient *client = i.getNode()->getValue();
+                       assert(client->peer_id == i.getNode()->getKey());
+                       if(client->serialization_version == SER_FMT_VER_INVALID)
+                               continue;
 
-       JMutexAutoLock clientslock(m_con_mutex);
+                       SendChatMessage(client->peer_id, line);
+               }
+       }
 
-       for(core::map<u16, RemoteClient*>::Iterator
-               i = m_clients.getIterator();
-               i.atEnd() == false; i++)
+       /*
+               Save players
+       */
+       m_env.serializePlayers(m_mapsavedir);
+       
+       /*
+               Stop threads
+       */
+       stop();
+       
+       /*
+               Delete clients
+       */
        {
-               /*// Delete player
-               // NOTE: These are removed by env destructor
+               JMutexAutoLock clientslock(m_con_mutex);
+
+               for(core::map<u16, RemoteClient*>::Iterator
+                       i = m_clients.getIterator();
+                       i.atEnd() == false; i++)
                {
-                       u16 peer_id = i.getNode()->getKey();
-                       JMutexAutoLock envlock(m_env_mutex);
-                       m_env.removePlayer(peer_id);
-               }*/
-               
-               // Delete client
-               delete i.getNode()->getValue();
+                       /*// Delete player
+                       // NOTE: These are removed by env destructor
+                       {
+                               u16 peer_id = i.getNode()->getKey();
+                               JMutexAutoLock envlock(m_env_mutex);
+                               m_env.removePlayer(peer_id);
+                       }*/
+                       
+                       // Delete client
+                       delete i.getNode()->getValue();
+               }
        }
 }
 
@@ -943,19 +1030,25 @@ void Server::start(unsigned short port)
        m_thread.setRun(true);
        m_thread.Start();
        
-       dout_server<<"Server started on port "<<port<<std::endl;
+       dout_server<<"Server: Started on port "<<port<<std::endl;
 }
 
 void Server::stop()
 {
        DSTACK(__FUNCTION_NAME);
+
        // Stop threads (set run=false first so both start stopping)
        m_thread.setRun(false);
        m_emergethread.setRun(false);
        m_thread.stop();
        m_emergethread.stop();
        
-       dout_server<<"Server threads stopped"<<std::endl;
+       dout_server<<"Server: Threads stopped"<<std::endl;
+
+       dout_server<<"Server: Saving players"<<std::endl;
+       // Save players
+       // FIXME: Apparently this does not do anything here
+       //m_env.serializePlayers(m_mapsavedir);
 }
 
 void Server::step(float dtime)
@@ -1062,58 +1155,36 @@ void Server::AsyncRunStep()
        /*
                Do background stuff
        */
-
+       
        /*
-               Flow water
+               Transform liquids
        */
+       m_liquid_transform_timer += dtime;
+       if(m_liquid_transform_timer >= 1.00)
        {
-               float interval;
+               m_liquid_transform_timer -= 1.00;
                
-               if(g_settings.getBool("endless_water") == false)
-                       interval = 1.0;
-               else
-                       interval = 0.25;
-
-               float &counter = m_flowwater_timer;
-               counter += dtime;
-               if(counter >= 0.25 && m_flow_active_nodes.size() > 0)
-               {
+               JMutexAutoLock lock(m_env_mutex);
                
-               counter = 0.0;
-
                core::map<v3s16, MapBlock*> modified_blocks;
-
+               m_env.getMap().transformLiquids(modified_blocks);
+#if 0          
+               /*
+                       Update lighting
+               */
+               core::map<v3s16, MapBlock*> lighting_modified_blocks;
+               ServerMap &map = ((ServerMap&)m_env.getMap());
+               map.updateLighting(modified_blocks, lighting_modified_blocks);
+               
+               // Add blocks modified by lighting to modified_blocks
+               for(core::map<v3s16, MapBlock*>::Iterator
+                               i = lighting_modified_blocks.getIterator();
+                               i.atEnd() == false; i++)
                {
-
-                       JMutexAutoLock envlock(m_env_mutex);
-                       
-                       MapVoxelManipulator v(&m_env.getMap());
-                       v.m_disable_water_climb =
-                                       g_settings.getBool("disable_water_climb");
-                       
-                       if(g_settings.getBool("endless_water") == false)
-                               v.flowWater(m_flow_active_nodes, 0, false, 250);
-                       else
-                               v.flowWater(m_flow_active_nodes, 0, false, 50);
-
-                       v.blitBack(modified_blocks);
-
-                       ServerMap &map = ((ServerMap&)m_env.getMap());
-                       
-                       // Update lighting
-                       core::map<v3s16, MapBlock*> lighting_modified_blocks;
-                       map.updateLighting(modified_blocks, lighting_modified_blocks);
-                       
-                       // Add blocks modified by lighting to modified_blocks
-                       for(core::map<v3s16, MapBlock*>::Iterator
-                                       i = lighting_modified_blocks.getIterator();
-                                       i.atEnd() == false; i++)
-                       {
-                               MapBlock *block = i.getNode()->getValue();
-                               modified_blocks.insert(block->getPos(), block);
-                       }
-               } // envlock
-
+                       MapBlock *block = i.getNode()->getValue();
+                       modified_blocks.insert(block->getPos(), block);
+               }
+#endif
                /*
                        Set the modified blocks unsent for all the clients
                */
@@ -1132,10 +1203,8 @@ void Server::AsyncRunStep()
                                client->SetBlocksNotSent(modified_blocks);
                        }
                }
-
-               } // interval counter
        }
-       
+
        // Periodically print some info
        {
                float &counter = m_print_info_timer;
@@ -1157,15 +1226,18 @@ void Server::AsyncRunStep()
                }
        }
 
-       /*
-               Update digging
+       if(g_settings.getBool("enable_experimental"))
+       {
 
-               NOTE: Some of this could be moved to RemoteClient
+       /*
+               Check added and deleted active objects
        */
-#if 0
        {
                JMutexAutoLock envlock(m_env_mutex);
                JMutexAutoLock conlock(m_con_mutex);
+               
+               // Radius inside which objects are active
+               s16 radius = 32;
 
                for(core::map<u16, RemoteClient*>::Iterator
                        i = m_clients.getIterator();
@@ -1173,100 +1245,249 @@ void Server::AsyncRunStep()
                {
                        RemoteClient *client = i.getNode()->getValue();
                        Player *player = m_env.getPlayer(client->peer_id);
-
-                       JMutexAutoLock digmutex(client->m_dig_mutex);
-
-                       if(client->m_dig_tool_item == -1)
+                       if(player==NULL)
                                continue;
-
-                       client->m_dig_time_remaining -= dtime;
-
-                       if(client->m_dig_time_remaining > 0)
-                       {
-                               client->m_time_from_building.set(0.0);
+                       v3s16 pos = floatToInt(player->getPosition(), BS);
+
+                       core::map<u16, bool> removed_objects;
+                       core::map<u16, bool> added_objects;
+                       m_env.getRemovedActiveObjects(pos, radius,
+                                       client->m_known_objects, removed_objects);
+                       m_env.getAddedActiveObjects(pos, radius,
+                                       client->m_known_objects, added_objects);
+                       
+                       // Ignore if nothing happened
+                       if(removed_objects.size() == 0 && added_objects.size() == 0)
                                continue;
-                       }
+                       
+                       std::string data_buffer;
 
-                       v3s16 p_under = client->m_dig_position;
+                       char buf[4];
                        
-                       // Mandatory parameter; actually used for nothing
-                       core::map<v3s16, MapBlock*> modified_blocks;
+                       // Handle removed objects
+                       writeU16((u8*)buf, removed_objects.size());
+                       data_buffer.append(buf, 2);
+                       for(core::map<u16, bool>::Iterator
+                                       i = removed_objects.getIterator();
+                                       i.atEnd()==false; i++)
+                       {
+                               // Get object
+                               u16 id = i.getNode()->getKey();
+                               ServerActiveObject* obj = m_env.getActiveObject(id);
+
+                               // Add to data buffer for sending
+                               writeU16((u8*)buf, i.getNode()->getKey());
+                               data_buffer.append(buf, 2);
+                               
+                               // Remove from known objects
+                               client->m_known_objects.remove(i.getNode()->getKey());
 
-                       u8 material;
+                               if(obj && obj->m_known_by_count > 0)
+                                       obj->m_known_by_count--;
+                       }
 
-                       try
+                       // Handle added objects
+                       writeU16((u8*)buf, added_objects.size());
+                       data_buffer.append(buf, 2);
+                       for(core::map<u16, bool>::Iterator
+                                       i = added_objects.getIterator();
+                                       i.atEnd()==false; i++)
                        {
-                               // Get material at position
-                               material = m_env.getMap().getNode(p_under).d;
-                               // If it's not diggable, do nothing
-                               if(content_diggable(material) == false)
-                               {
-                                       derr_server<<"Server: Not finishing digging: Node not diggable"
-                                                       <<std::endl;
-                                       client->m_dig_tool_item = -1;
-                                       break;
-                               }
-                       }
-                       catch(InvalidPositionException &e)
-                       {
-                               derr_server<<"Server: Not finishing digging: Node not found"
-                                               <<std::endl;
-                               client->m_dig_tool_item = -1;
-                               break;
+                               // Get object
+                               u16 id = i.getNode()->getKey();
+                               ServerActiveObject* obj = m_env.getActiveObject(id);
+                               
+                               // Get object type
+                               u8 type = ACTIVEOBJECT_TYPE_INVALID;
+                               if(obj == NULL)
+                                       dstream<<"WARNING: "<<__FUNCTION_NAME
+                                                       <<": NULL object"<<std::endl;
+                               else
+                                       type = obj->getType();
+
+                               // Add to data buffer for sending
+                               writeU16((u8*)buf, id);
+                               data_buffer.append(buf, 2);
+                               writeU8((u8*)buf, type);
+                               data_buffer.append(buf, 1);
+
+                               data_buffer.append(serializeLongString(
+                                               obj->getClientInitializationData()));
+
+                               // Add to known objects
+                               client->m_known_objects.insert(i.getNode()->getKey(), false);
+
+                               if(obj)
+                                       obj->m_known_by_count++;
                        }
-                       
-                       // Create packet
-                       u32 replysize = 8;
-                       SharedBuffer<u8> reply(replysize);
-                       writeU16(&reply[0], TOCLIENT_REMOVENODE);
-                       writeS16(&reply[2], p_under.X);
-                       writeS16(&reply[4], p_under.Y);
-                       writeS16(&reply[6], p_under.Z);
+
+                       // Send packet
+                       SharedBuffer<u8> reply(2 + data_buffer.size());
+                       writeU16(&reply[0], TOCLIENT_ACTIVE_OBJECT_REMOVE_ADD);
+                       memcpy((char*)&reply[2], data_buffer.c_str(),
+                                       data_buffer.size());
                        // Send as reliable
-                       m_con.SendToAll(0, reply, true);
+                       m_con.Send(client->peer_id, 0, reply, true);
+
+                       dstream<<"INFO: Server: Sent object remove/add: "
+                                       <<removed_objects.size()<<" removed, "
+                                       <<added_objects.size()<<" added, "
+                                       <<"packet size is "<<reply.getSize()<<std::endl;
+               }
+       }
+
+       /*
+               Send object messages
+       */
+       {
+               JMutexAutoLock envlock(m_env_mutex);
+               JMutexAutoLock conlock(m_con_mutex);
+
+               // Key = object id
+               // Value = data sent by object
+               core::map<u16, core::list<ActiveObjectMessage>* > buffered_messages;
+
+               // Get active object messages from environment
+               for(;;)
+               {
+                       ActiveObjectMessage aom = m_env.getActiveObjectMessage();
+                       if(aom.id == 0)
+                               break;
                        
-                       if(g_settings.getBool("creative_mode") == false)
+                       core::list<ActiveObjectMessage>* message_list = NULL;
+                       core::map<u16, core::list<ActiveObjectMessage>* >::Node *n;
+                       n = buffered_messages.find(aom.id);
+                       if(n == NULL)
                        {
-                               // Add to inventory and send inventory
-                               InventoryItem *item = new MaterialItem(material, 1);
-                               player->inventory.addItem("main", item);
-                               SendInventory(player->peer_id);
+                               message_list = new core::list<ActiveObjectMessage>;
+                               buffered_messages.insert(aom.id, message_list);
+                       }
+                       else
+                       {
+                               message_list = n->getValue();
+                       }
+                       message_list->push_back(aom);
+               }
+               
+               // Route data to every client
+               for(core::map<u16, RemoteClient*>::Iterator
+                       i = m_clients.getIterator();
+                       i.atEnd()==false; i++)
+               {
+                       RemoteClient *client = i.getNode()->getValue();
+                       std::string reliable_data;
+                       std::string unreliable_data;
+                       // Go through all objects in message buffer
+                       for(core::map<u16, core::list<ActiveObjectMessage>* >::Iterator
+                                       j = buffered_messages.getIterator();
+                                       j.atEnd()==false; j++)
+                       {
+                               // If object is not known by client, skip it
+                               u16 id = j.getNode()->getKey();
+                               if(client->m_known_objects.find(id) == NULL)
+                                       continue;
+                               // Get message list of object
+                               core::list<ActiveObjectMessage>* list = j.getNode()->getValue();
+                               // Go through every message
+                               for(core::list<ActiveObjectMessage>::Iterator
+                                               k = list->begin(); k != list->end(); k++)
+                               {
+                                       // Compose the full new data with header
+                                       ActiveObjectMessage aom = *k;
+                                       std::string new_data;
+                                       // Add object id
+                                       char buf[2];
+                                       writeU16((u8*)&buf[0], aom.id);
+                                       new_data.append(buf, 2);
+                                       // Add data
+                                       new_data += serializeString(aom.datastring);
+                                       // Add data to buffer
+                                       if(aom.reliable)
+                                               reliable_data += new_data;
+                                       else
+                                               unreliable_data += new_data;
+                               }
                        }
-
-                       /*
-                               Remove the node
-                               (this takes some time so it is done after the quick stuff)
-                       */
-                       m_env.getMap().removeNodeAndUpdate(p_under, modified_blocks);
-                       
                        /*
-                               Update water
+                               reliable_data and unreliable_data are now ready.
+                               Send them.
                        */
-                       
-                       // Update water pressure around modification
-                       // This also adds it to m_flow_active_nodes if appropriate
+                       if(reliable_data.size() > 0)
+                       {
+                               SharedBuffer<u8> reply(2 + reliable_data.size());
+                               writeU16(&reply[0], TOCLIENT_ACTIVE_OBJECT_MESSAGES);
+                               memcpy((char*)&reply[2], reliable_data.c_str(),
+                                               reliable_data.size());
+                               // Send as reliable
+                               m_con.Send(client->peer_id, 0, reply, true);
+                       }
+                       if(unreliable_data.size() > 0)
+                       {
+                               SharedBuffer<u8> reply(2 + unreliable_data.size());
+                               writeU16(&reply[0], TOCLIENT_ACTIVE_OBJECT_MESSAGES);
+                               memcpy((char*)&reply[2], unreliable_data.c_str(),
+                                               unreliable_data.size());
+                               // Send as unreliable
+                               m_con.Send(client->peer_id, 0, reply, false);
+                       }
 
-                       MapVoxelManipulator v(&m_env.getMap());
-                       v.m_disable_water_climb =
-                                       g_settings.getBool("disable_water_climb");
-                       
-                       VoxelArea area(p_under-v3s16(1,1,1), p_under+v3s16(1,1,1));
+                       /*if(reliable_data.size() > 0 || unreliable_data.size() > 0)
+                       {
+                               dstream<<"INFO: Server: Size of object message data: "
+                                               <<"reliable: "<<reliable_data.size()
+                                               <<", unreliable: "<<unreliable_data.size()
+                                               <<std::endl;
+                       }*/
+               }
 
-                       try
+               // Clear buffered_messages
+               for(core::map<u16, core::list<ActiveObjectMessage>* >::Iterator
+                               i = buffered_messages.getIterator();
+                               i.atEnd()==false; i++)
+               {
+                       delete i.getNode()->getValue();
+               }
+       }
+
+       } // enable_experimental
+
+       /*
+               Send queued-for-sending map edit events.
+       */
+       {
+               while(m_unsent_map_edit_queue.size() != 0)
+               {
+                       MapEditEvent* event = m_unsent_map_edit_queue.pop_front();
+
+                       if(event->type == MEET_ADDNODE)
                        {
-                               v.updateAreaWaterPressure(area, m_flow_active_nodes);
+                               dstream<<"Server: MEET_ADDNODE"<<std::endl;
+                               sendAddNode(event->p, event->n, event->already_known_by_peer);
                        }
-                       catch(ProcessingLimitException &e)
+                       else if(event->type == MEET_REMOVENODE)
                        {
-                               dstream<<"Processing limit reached (1)"<<std::endl;
+                               dstream<<"Server: MEET_REMOVENODE"<<std::endl;
+                               sendRemoveNode(event->p, event->already_known_by_peer);
                        }
-                       
-                       v.blitBack(modified_blocks);
+                       else if(event->type == MEET_OTHER)
+                       {
+                               dstream<<"WARNING: Server: MEET_OTHER not implemented"
+                                               <<std::endl;
+                       }
+                       else
+                       {
+                               dstream<<"WARNING: Server: Unknown MapEditEvent "
+                                               <<((u32)event->type)<<std::endl;
+                       }
+
+                       delete event;
                }
        }
-#endif
 
-       // Send object positions
+       /*
+               Send object positions
+               TODO: Get rid of MapBlockObjects
+       */
        {
                float &counter = m_objectdata_timer;
                counter += dtime;
@@ -1280,8 +1501,10 @@ void Server::AsyncRunStep()
                }
        }
        
-       // Trigger emergethread (it gets somehow gets to a
-       // non-triggered but bysy state sometimes)
+       /*
+               Trigger emergethread (it somehow gets to a non-triggered but
+               bysy state sometimes)
+       */
        {
                float &counter = m_emergethread_trigger_timer;
                counter += dtime;
@@ -1303,16 +1526,22 @@ void Server::AsyncRunStep()
 
                        JMutexAutoLock lock(m_env_mutex);
 
-                       // Save only changed parts
-                       m_env.getMap().save(true);
-
-                       // Delete unused sectors
-                       u32 deleted_count = m_env.getMap().deleteUnusedSectors(
-                                       g_settings.getFloat("server_unload_unused_sectors_timeout"));
-                       if(deleted_count > 0)
+                       if(((ServerMap*)(&m_env.getMap()))->isSavingEnabled() == true)
                        {
-                               dout_server<<"Server: Unloaded "<<deleted_count
-                                               <<" sectors from memory"<<std::endl;
+                               // Save only changed parts
+                               m_env.getMap().save(true);
+
+                               // Delete unused sectors
+                               u32 deleted_count = m_env.getMap().deleteUnusedSectors(
+                                               g_settings.getFloat("server_unload_unused_sectors_timeout"));
+                               if(deleted_count > 0)
+                               {
+                                       dout_server<<"Server: Unloaded "<<deleted_count
+                                                       <<" sectors from memory"<<std::endl;
+                               }
+
+                               // Save players
+                               m_env.serializePlayers(m_mapsavedir);
                        }
                }
        }
@@ -1378,7 +1607,6 @@ void Server::ProcessData(u8 *data, u32 datasize, u16 peer_id)
                return;
        }
        
-       //u8 peer_ser_ver = peer->serialization_version;
        u8 peer_ser_ver = getClient(peer->id)->serialization_version;
 
        try
@@ -1436,9 +1664,28 @@ void Server::ProcessData(u8 *data, u32 datasize, u16 peer_id)
                playername[playername_size-1] = 0;
                
                // Get player
-               Player *player = emergePlayer(playername, "");
+               Player *player = emergePlayer(playername, "", peer_id);
                //Player *player = m_env.getPlayer(peer_id);
 
+               /*{
+                       // DEBUG: Test serialization
+                       std::ostringstream test_os;
+                       player->serialize(test_os);
+                       dstream<<"Player serialization test: \""<<test_os.str()
+                                       <<"\""<<std::endl;
+                       std::istringstream test_is(test_os.str());
+                       player->deSerialize(test_is);
+               }*/
+
+               // If failed, cancel
+               if(player == NULL)
+               {
+                       derr_server<<DTIME<<"Server: peer_id="<<peer_id
+                                       <<": failed to emerge player"<<std::endl;
+                       return;
+               }
+
+               /*
                // If a client is already connected to the player, cancel
                if(player->peer_id != 0)
                {
@@ -1448,9 +1695,9 @@ void Server::ProcessData(u8 *data, u32 datasize, u16 peer_id)
                                        <<player->peer_id<<")"<<std::endl;
                        return;
                }
-
                // Set client of player
                player->peer_id = peer_id;
+               */
 
                // Check if player doesn't exist
                if(player == NULL)
@@ -1466,10 +1713,12 @@ void Server::ProcessData(u8 *data, u32 datasize, u16 peer_id)
 
                // Now answer with a TOCLIENT_INIT
                
-               SharedBuffer<u8> reply(2+1+6);
+               SharedBuffer<u8> reply(2+1+6+8);
                writeU16(&reply[0], TOCLIENT_INIT);
                writeU8(&reply[2], deployed);
-               writeV3S16(&reply[3], floatToInt(player->getPosition()+v3f(0,BS/2,0)));
+               writeV3S16(&reply[2+1], floatToInt(player->getPosition()+v3f(0,BS/2,0), BS));
+               //writeU64(&reply[2+1+6], m_env.getServerMap().getSeed());
+               
                // Send as reliable
                m_con.Send(peer_id, 0, reply, true);
 
@@ -1500,37 +1749,9 @@ void Server::ProcessData(u8 *data, u32 datasize, u16 peer_id)
                                        m_time_of_day.get());
                        m_con.Send(peer->id, 0, data, true);
                }
-
+               
                // Send information about server to player in chat
-               {
-                       std::wostringstream os(std::ios_base::binary);
-                       os<<L"# Server: ";
-                       // Uptime
-                       os<<L"uptime="<<m_uptime.get();
-                       // Information about clients
-                       os<<L", clients={";
-                       for(core::map<u16, RemoteClient*>::Iterator
-                               i = m_clients.getIterator();
-                               i.atEnd() == false; i++)
-                       {
-                               // Get client and check that it is valid
-                               RemoteClient *client = i.getNode()->getValue();
-                               assert(client->peer_id == i.getNode()->getKey());
-                               if(client->serialization_version == SER_FMT_VER_INVALID)
-                                       continue;
-                               // Get player
-                               Player *player = m_env.getPlayer(client->peer_id);
-                               // Get name of player
-                               std::wstring name = L"unknown";
-                               if(player != NULL)
-                                       name = narrow_to_wide(player->getName());
-                               // Add name to information string
-                               os<<name<<L",";
-                       }
-                       os<<L"}";
-                       // Send message
-                       SendChatMessage(peer_id, os.str());
-               }
+               SendChatMessage(peer_id, getStatusString());
                
                // Send information about joining in chat
                {
@@ -1735,6 +1956,7 @@ void Server::ProcessData(u8 *data, u32 datasize, u16 peer_id)
                        0: start digging
                        1: place block
                        2: stop digging (all parameters ignored)
+                       3: digging completed
                */
                u8 action = readU8(&data[2]);
                v3s16 p_under;
@@ -1781,57 +2003,48 @@ void Server::ProcessData(u8 *data, u32 datasize, u16 peer_id)
                        core::map<v3s16, MapBlock*> modified_blocks;
 
                        u8 material;
+                       u8 mineral = MINERAL_NONE;
 
                        try
                        {
+                               MapNode n = m_env.getMap().getNode(p_under);
                                // Get material at position
-                               material = m_env.getMap().getNode(p_under).d;
+                               material = n.d;
                                // If it's not diggable, do nothing
                                if(content_diggable(material) == false)
                                {
                                        derr_server<<"Server: Not finishing digging: Node not diggable"
                                                        <<std::endl;
+
+                                       // Client probably has wrong data.
+                                       // Set block not sent, so that client will get
+                                       // a valid one.
+                                       dstream<<"Client "<<peer_id<<" tried to dig "
+                                                       <<"node from invalid position; setting"
+                                                       <<" MapBlock not sent."<<std::endl;
+                                       RemoteClient *client = getClient(peer_id);
+                                       v3s16 blockpos = getNodeBlockPos(p_under);
+                                       client->SetBlockNotSent(blockpos);
+                                               
                                        return;
                                }
+                               // Get mineral
+                               mineral = n.getMineral();
                        }
                        catch(InvalidPositionException &e)
                        {
-                               derr_server<<"Server: Not finishing digging: Node not found"
+                               derr_server<<"Server: Not finishing digging: Node not found."
+                                               <<" Adding block to emerge queue."
                                                <<std::endl;
+                               m_emerge_queue.addBlock(peer_id,
+                                               getNodeBlockPos(p_over), BLOCK_EMERGE_FLAG_FROMDISK);
                                return;
                        }
                        
-                       //TODO: Send to only other clients
-                       
                        /*
                                Send the removal to all other clients
                        */
-
-                       // Create packet
-                       u32 replysize = 8;
-                       SharedBuffer<u8> reply(replysize);
-                       writeU16(&reply[0], TOCLIENT_REMOVENODE);
-                       writeS16(&reply[2], p_under.X);
-                       writeS16(&reply[4], p_under.Y);
-                       writeS16(&reply[6], p_under.Z);
-
-                       for(core::map<u16, RemoteClient*>::Iterator
-                               i = m_clients.getIterator();
-                               i.atEnd() == false; i++)
-                       {
-                               // Get client and check that it is valid
-                               RemoteClient *client = i.getNode()->getValue();
-                               assert(client->peer_id == i.getNode()->getKey());
-                               if(client->serialization_version == SER_FMT_VER_INVALID)
-                                       continue;
-
-                               // Don't send if it's the same one
-                               if(peer_id == client->peer_id)
-                                       continue;
-
-                               // Send as reliable
-                               m_con.Send(client->peer_id, 0, reply, true);
-                       }
+                       sendRemoveNode(p_under, peer_id);
                        
                        /*
                                Update and send inventory
@@ -1872,46 +2085,42 @@ void Server::ProcessData(u8 *data, u32 datasize, u16 peer_id)
                                }
 
                                /*
-                                       Add digged item to inventory
+                                       Add dug item to inventory
                                */
-                               InventoryItem *item = new MaterialItem(material, 1);
-                               player->inventory.addItem("main", item);
 
-                               /*
-                                       Send inventory
-                               */
-                               SendInventory(player->peer_id);
+                               InventoryItem *item = NULL;
+
+                               if(mineral != MINERAL_NONE)
+                                       item = getDiggedMineralItem(mineral);
+                               
+                               // If not mineral
+                               if(item == NULL)
+                               {
+                                       std::string &dug_s = content_features(material).dug_item;
+                                       if(dug_s != "")
+                                       {
+                                               std::istringstream is(dug_s, std::ios::binary);
+                                               item = InventoryItem::deSerialize(is);
+                                       }
+                               }
+                               
+                               if(item != NULL)
+                               {
+                                       // Add a item to inventory
+                                       player->inventory.addItem("main", item);
+
+                                       // Send inventory
+                                       SendInventory(player->peer_id);
+                               }
                        }
 
                        /*
                                Remove the node
                                (this takes some time so it is done after the quick stuff)
                        */
+                       m_ignore_map_edit_events = true;
                        m_env.getMap().removeNodeAndUpdate(p_under, modified_blocks);
-                       
-                       /*
-                               Update water
-                       */
-                       
-                       // Update water pressure around modification
-                       // This also adds it to m_flow_active_nodes if appropriate
-
-                       MapVoxelManipulator v(&m_env.getMap());
-                       v.m_disable_water_climb =
-                                       g_settings.getBool("disable_water_climb");
-                       
-                       VoxelArea area(p_under-v3s16(1,1,1), p_under+v3s16(1,1,1));
-
-                       try
-                       {
-                               v.updateAreaWaterPressure(area, m_flow_active_nodes);
-                       }
-                       catch(ProcessingLimitException &e)
-                       {
-                               dstream<<"Processing limit reached (1)"<<std::endl;
-                       }
-                       
-                       v.blitBack(modified_blocks);
+                       m_ignore_map_edit_events = false;
                }
                
                /*
@@ -1940,61 +2149,44 @@ void Server::ProcessData(u8 *data, u32 datasize, u16 peer_id)
                                        // Don't add a node if this is not a free space
                                        MapNode n2 = m_env.getMap().getNode(p_over);
                                        if(content_buildable_to(n2.d) == false)
+                                       {
+                                               // Client probably has wrong data.
+                                               // Set block not sent, so that client will get
+                                               // a valid one.
+                                               dstream<<"Client "<<peer_id<<" tried to place"
+                                                               <<" node in invalid position; setting"
+                                                               <<" MapBlock not sent."<<std::endl;
+                                               RemoteClient *client = getClient(peer_id);
+                                               v3s16 blockpos = getNodeBlockPos(p_over);
+                                               client->SetBlockNotSent(blockpos);
                                                return;
+                                       }
                                }
                                catch(InvalidPositionException &e)
                                {
                                        derr_server<<"Server: Ignoring ADDNODE: Node not found"
+                                                       <<" Adding block to emerge queue."
                                                        <<std::endl;
+                                       m_emerge_queue.addBlock(peer_id,
+                                                       getNodeBlockPos(p_over), BLOCK_EMERGE_FLAG_FROMDISK);
                                        return;
                                }
 
                                // Reset build time counter
-                               getClient(peer->id)->m_time_from_building.set(0.0);
+                               getClient(peer->id)->m_time_from_building = 0.0;
                                
                                // Create node data
                                MaterialItem *mitem = (MaterialItem*)item;
                                MapNode n;
                                n.d = mitem->getMaterial();
-                               if(content_directional(n.d))
+                               if(content_features(n.d).wall_mounted)
                                        n.dir = packDir(p_under - p_over);
-
-#if 1
-                               // Create packet
-                               u32 replysize = 8 + MapNode::serializedLength(peer_ser_ver);
-                               SharedBuffer<u8> reply(replysize);
-                               writeU16(&reply[0], TOCLIENT_ADDNODE);
-                               writeS16(&reply[2], p_over.X);
-                               writeS16(&reply[4], p_over.Y);
-                               writeS16(&reply[6], p_over.Z);
-                               n.serialize(&reply[8], peer_ser_ver);
-                               // Send as reliable
-                               m_con.SendToAll(0, reply, true);
                                
                                /*
-                                       Handle inventory
+                                       Send to all players
                                */
-                               InventoryList *ilist = player->inventory.getList("main");
-                               if(g_settings.getBool("creative_mode") == false && ilist)
-                               {
-                                       // Remove from inventory and send inventory
-                                       if(mitem->getCount() == 1)
-                                               ilist->deleteItem(item_i);
-                                       else
-                                               mitem->remove(1);
-                                       // Send inventory
-                                       SendInventory(peer_id);
-                               }
+                               sendAddNode(p_over, n, 0);
                                
-                               /*
-                                       Add node.
-
-                                       This takes some time so it is done after the quick stuff
-                               */
-                               core::map<v3s16, MapBlock*> modified_blocks;
-                               m_env.getMap().addNodeAndUpdate(p_over, n, modified_blocks);
-#endif
-#if 0
                                /*
                                        Handle inventory
                                */
@@ -2009,58 +2201,31 @@ void Server::ProcessData(u8 *data, u32 datasize, u16 peer_id)
                                        // Send inventory
                                        SendInventory(peer_id);
                                }
-
+                               
                                /*
                                        Add node.
 
                                        This takes some time so it is done after the quick stuff
                                */
                                core::map<v3s16, MapBlock*> modified_blocks;
+                               m_ignore_map_edit_events = true;
                                m_env.getMap().addNodeAndUpdate(p_over, n, modified_blocks);
-
+                               m_ignore_map_edit_events = false;
+                               
                                /*
-                                       Set the modified blocks unsent for all the clients
+                                       Calculate special events
                                */
                                
-                               //JMutexAutoLock lock2(m_con_mutex);
-
-                               for(core::map<u16, RemoteClient*>::Iterator
-                                               i = m_clients.getIterator();
-                                               i.atEnd() == false; i++)
+                               /*if(n.d == CONTENT_MESE)
                                {
-                                       RemoteClient *client = i.getNode()->getValue();
-                                       
-                                       if(modified_blocks.size() > 0)
+                                       u32 count = 0;
+                                       for(s16 z=-1; z<=1; z++)
+                                       for(s16 y=-1; y<=1; y++)
+                                       for(s16 x=-1; x<=1; x++)
                                        {
-                                               // Remove block from sent history
-                                               client->SetBlocksNotSent(modified_blocks);
+                                               
                                        }
-                               }
-#endif
-                               
-                               /*
-                                       Update water
-                               */
-                               
-                               // Update water pressure around modification
-                               // This also adds it to m_flow_active_nodes if appropriate
-
-                               MapVoxelManipulator v(&m_env.getMap());
-                               v.m_disable_water_climb =
-                                               g_settings.getBool("disable_water_climb");
-                               
-                               VoxelArea area(p_over-v3s16(1,1,1), p_over+v3s16(1,1,1));
-
-                               try
-                               {
-                                       v.updateAreaWaterPressure(area, m_flow_active_nodes);
-                               }
-                               catch(ProcessingLimitException &e)
-                               {
-                                       dstream<<"Processing limit reached (1)"<<std::endl;
-                               }
-                               
-                               v.blitBack(modified_blocks);
+                               }*/
                        }
                        /*
                                Handle other items
@@ -2082,9 +2247,9 @@ void Server::ProcessData(u8 *data, u32 datasize, u16 peer_id)
                                }
 
                                v3s16 block_pos_i_on_map = block->getPosRelative();
-                               v3f block_pos_f_on_map = intToFloat(block_pos_i_on_map);
+                               v3f block_pos_f_on_map = intToFloat(block_pos_i_on_map, BS);
 
-                               v3f pos = intToFloat(p_over);
+                               v3f pos = intToFloat(p_over, BS);
                                pos -= block_pos_f_on_map;
                                
                                /*dout_server<<"pos="
@@ -2331,31 +2496,117 @@ void Server::ProcessData(u8 *data, u32 datasize, u16 peer_id)
 
                // Get player name of this client
                std::wstring name = narrow_to_wide(player->getName());
-
-               std::wstring line = std::wstring(L"<")+name+L"> "+message;
                
-               dstream<<"CHAT: "<<wide_to_narrow(line)<<std::endl;
-
-               /*
-                       Send the message to all other clients
-               */
-               for(core::map<u16, RemoteClient*>::Iterator
-                       i = m_clients.getIterator();
-                       i.atEnd() == false; i++)
+               // Line to send to players
+               std::wstring line;
+               // Whether to send to the player that sent the line
+               bool send_to_sender = false;
+               // Whether to send to other players
+               bool send_to_others = false;
+               
+               // Parse commands
+               std::wstring commandprefix = L"/#";
+               if(message.substr(0, commandprefix.size()) == commandprefix)
+               {
+                       line += L"Server: ";
+
+                       message = message.substr(commandprefix.size());
+                       // Get player name as narrow string
+                       std::string name_s = player->getName();
+                       // Convert message to narrow string
+                       std::string message_s = wide_to_narrow(message);
+                       // Operator is the single name defined in config.
+                       std::string operator_name = g_settings.get("name");
+                       bool is_operator = (operator_name != "" &&
+                                       wide_to_narrow(name) == operator_name);
+                       bool valid_command = false;
+                       if(message_s == "help")
+                       {
+                               line += L"-!- Available commands: ";
+                               line += L"status ";
+                               if(is_operator)
+                               {
+                                       line += L"shutdown setting ";
+                               }
+                               else
+                               {
+                               }
+                               send_to_sender = true;
+                               valid_command = true;
+                       }
+                       else if(message_s == "status")
+                       {
+                               line = getStatusString();
+                               send_to_sender = true;
+                               valid_command = true;
+                       }
+                       else if(is_operator)
+                       {
+                               if(message_s == "shutdown")
+                               {
+                                       dstream<<DTIME<<" Server: Operator requested shutdown."
+                                                       <<std::endl;
+                                       m_shutdown_requested.set(true);
+                                       
+                                       line += L"*** Server shutting down (operator request)";
+                                       send_to_sender = true;
+                                       valid_command = true;
+                               }
+                               else if(message_s.substr(0,8) == "setting ")
+                               {
+                                       std::string confline = message_s.substr(8);
+                                       g_settings.parseConfigLine(confline);
+                                       line += L"-!- Setting changed.";
+                                       send_to_sender = true;
+                                       valid_command = true;
+                               }
+                       }
+                       
+                       if(valid_command == false)
+                       {
+                               line += L"-!- Invalid command: " + message;
+                               send_to_sender = true;
+                       }
+               }
+               else
                {
-                       // Get client and check that it is valid
-                       RemoteClient *client = i.getNode()->getValue();
-                       assert(client->peer_id == i.getNode()->getKey());
-                       if(client->serialization_version == SER_FMT_VER_INVALID)
-                               continue;
-
-                       // Don't send if it's the same one
-                       if(peer_id == client->peer_id)
-                               continue;
-
-                       SendChatMessage(client->peer_id, line);
+                       line += L"<";
+                       /*if(is_operator)
+                               line += L"@";*/
+                       line += name;
+                       line += L"> ";
+                       line += message;
+                       send_to_others = true;
                }
-       }
+               
+               if(line != L"")
+               {
+                       dstream<<"CHAT: "<<wide_to_narrow(line)<<std::endl;
+
+                       /*
+                               Send the message to clients
+                       */
+                       for(core::map<u16, RemoteClient*>::Iterator
+                               i = m_clients.getIterator();
+                               i.atEnd() == false; i++)
+                       {
+                               // Get client and check that it is valid
+                               RemoteClient *client = i.getNode()->getValue();
+                               assert(client->peer_id == i.getNode()->getKey());
+                               if(client->serialization_version == SER_FMT_VER_INVALID)
+                                       continue;
+
+                               // Filter recipient
+                               bool sender_selected = (peer_id == client->peer_id);
+                               if(sender_selected == true && send_to_sender == false)
+                                       continue;
+                               if(sender_selected == false && send_to_others == false)
+                                       continue;
+
+                               SendChatMessage(client->peer_id, line);
+                       }
+               }
+       }
        else
        {
                derr_server<<"WARNING: Server::ProcessData(): Ignoring "
@@ -2371,41 +2622,13 @@ void Server::ProcessData(u8 *data, u32 datasize, u16 peer_id)
        }
 }
 
-/*void Server::Send(u16 peer_id, u16 channelnum,
-               SharedBuffer<u8> data, bool reliable)
+void Server::onMapEditEvent(MapEditEvent *event)
 {
-       JMutexAutoLock lock(m_con_mutex);
-       m_con.Send(peer_id, channelnum, data, reliable);
-}*/
-
-void Server::SendBlockNoLock(u16 peer_id, MapBlock *block, u8 ver)
-{
-       DSTACK(__FUNCTION_NAME);
-       /*
-               Create a packet with the block in the right format
-       */
-       
-       std::ostringstream os(std::ios_base::binary);
-       block->serialize(os, ver);
-       std::string s = os.str();
-       SharedBuffer<u8> blockdata((u8*)s.c_str(), s.size());
-
-       u32 replysize = 8 + blockdata.getSize();
-       SharedBuffer<u8> reply(replysize);
-       v3s16 p = block->getPos();
-       writeU16(&reply[0], TOCLIENT_BLOCKDATA);
-       writeS16(&reply[2], p.X);
-       writeS16(&reply[4], p.Y);
-       writeS16(&reply[6], p.Z);
-       memcpy(&reply[8], *blockdata, blockdata.getSize());
-
-       /*dstream<<"Sending block ("<<p.X<<","<<p.Y<<","<<p.Z<<")"
-                       <<":  \tpacket size: "<<replysize<<std::endl;*/
-       
-       /*
-               Send packet
-       */
-       m_con.Send(peer_id, 1, reply, true);
+       dstream<<"Server::onMapEditEvent()"<<std::endl;
+       if(m_ignore_map_edit_events)
+               return;
+       MapEditEvent *e = event->clone();
+       m_unsent_map_edit_queue.push_back(e);
 }
 
 core::list<PlayerInfo> Server::getPlayerInfo()
@@ -2450,6 +2673,7 @@ core::list<PlayerInfo> Server::getPlayerInfo()
        return list;
 }
 
+
 void Server::peerAdded(con::Peer *peer)
 {
        DSTACK(__FUNCTION_NAME);
@@ -2523,6 +2747,7 @@ void Server::SendPlayerInfos()
                                "peer_id="<<player->peer_id<<std::endl;*/
                
                writeU16(&data[start], player->peer_id);
+               memset((char*)&data[start+2], 0, PLAYERNAME_SIZE);
                snprintf((char*)&data[start+2], PLAYERNAME_SIZE, "%s", player->getName());
                start += 2+PLAYERNAME_SIZE;
        }
@@ -2533,6 +2758,10 @@ void Server::SendPlayerInfos()
        m_con.SendToAll(0, data, true);
 }
 
+/*
+       Craft checking system
+*/
+
 enum ItemSpecType
 {
        ITEM_NONE,
@@ -2759,7 +2988,7 @@ void Server::SendInventory(u16 peer_id)
                        if(!found)
                        {
                                ItemSpec specs[9];
-                               specs[0] = ItemSpec(ITEM_MATERIAL, CONTENT_COALSTONE);
+                               specs[0] = ItemSpec(ITEM_CRAFT, "lump_of_coal");
                                specs[3] = ItemSpec(ITEM_CRAFT, "Stick");
                                if(checkItemCombination(items, specs))
                                {
@@ -2883,11 +3112,103 @@ void Server::BroadcastChatMessage(const std::wstring &message)
        }
 }
 
+void Server::sendRemoveNode(v3s16 p, u16 ignore_id)
+{
+       // Create packet
+       u32 replysize = 8;
+       SharedBuffer<u8> reply(replysize);
+       writeU16(&reply[0], TOCLIENT_REMOVENODE);
+       writeS16(&reply[2], p.X);
+       writeS16(&reply[4], p.Y);
+       writeS16(&reply[6], p.Z);
+
+       for(core::map<u16, RemoteClient*>::Iterator
+               i = m_clients.getIterator();
+               i.atEnd() == false; i++)
+       {
+               // Get client and check that it is valid
+               RemoteClient *client = i.getNode()->getValue();
+               assert(client->peer_id == i.getNode()->getKey());
+               if(client->serialization_version == SER_FMT_VER_INVALID)
+                       continue;
+
+               // Don't send if it's the same one
+               if(client->peer_id == ignore_id)
+                       continue;
+
+               // Send as reliable
+               m_con.Send(client->peer_id, 0, reply, true);
+       }
+}
+
+void Server::sendAddNode(v3s16 p, MapNode n, u16 ignore_id)
+{
+       for(core::map<u16, RemoteClient*>::Iterator
+               i = m_clients.getIterator();
+               i.atEnd() == false; i++)
+       {
+               // Get client and check that it is valid
+               RemoteClient *client = i.getNode()->getValue();
+               assert(client->peer_id == i.getNode()->getKey());
+               if(client->serialization_version == SER_FMT_VER_INVALID)
+                       continue;
+
+               // Don't send if it's the same one
+               if(client->peer_id == ignore_id)
+                       continue;
+
+               // Create packet
+               u32 replysize = 8 + MapNode::serializedLength(client->serialization_version);
+               SharedBuffer<u8> reply(replysize);
+               writeU16(&reply[0], TOCLIENT_ADDNODE);
+               writeS16(&reply[2], p.X);
+               writeS16(&reply[4], p.Y);
+               writeS16(&reply[6], p.Z);
+               n.serialize(&reply[8], client->serialization_version);
+
+               // Send as reliable
+               m_con.Send(client->peer_id, 0, reply, true);
+       }
+}
+
+void Server::SendBlockNoLock(u16 peer_id, MapBlock *block, u8 ver)
+{
+       DSTACK(__FUNCTION_NAME);
+       /*
+               Create a packet with the block in the right format
+       */
+       
+       std::ostringstream os(std::ios_base::binary);
+       block->serialize(os, ver);
+       std::string s = os.str();
+       SharedBuffer<u8> blockdata((u8*)s.c_str(), s.size());
+
+       u32 replysize = 8 + blockdata.getSize();
+       SharedBuffer<u8> reply(replysize);
+       v3s16 p = block->getPos();
+       writeU16(&reply[0], TOCLIENT_BLOCKDATA);
+       writeS16(&reply[2], p.X);
+       writeS16(&reply[4], p.Y);
+       writeS16(&reply[6], p.Z);
+       memcpy(&reply[8], *blockdata, blockdata.getSize());
+
+       /*dstream<<"Sending block ("<<p.X<<","<<p.Y<<","<<p.Z<<")"
+                       <<":  \tpacket size: "<<replysize<<std::endl;*/
+       
+       /*
+               Send packet
+       */
+       m_con.Send(peer_id, 1, reply, true);
+}
+
 void Server::SendBlocks(float dtime)
 {
        DSTACK(__FUNCTION_NAME);
 
        JMutexAutoLock envlock(m_env_mutex);
+       JMutexAutoLock conlock(m_con_mutex);
+
+       //TimeTaker timer("Server::SendBlocks");
 
        core::array<PrioritySortedBlockTransfer> queue;
 
@@ -2913,8 +3234,6 @@ void Server::SendBlocks(float dtime)
        // Lowest is most important.
        queue.sort();
 
-       JMutexAutoLock conlock(m_con_mutex);
-
        for(u32 i=0; i<queue.size(); i++)
        {
                //TODO: Calculate limit dynamically
@@ -2956,7 +3275,117 @@ RemoteClient* Server::getClient(u16 peer_id)
        return n->getValue();
 }
 
-Player *Server::emergePlayer(const char *name, const char *password)
+std::wstring Server::getStatusString()
+{
+       std::wostringstream os(std::ios_base::binary);
+       os<<L"# Server: ";
+       // Uptime
+       os<<L"uptime="<<m_uptime.get();
+       // Information about clients
+       os<<L", clients={";
+       for(core::map<u16, RemoteClient*>::Iterator
+               i = m_clients.getIterator();
+               i.atEnd() == false; i++)
+       {
+               // Get client and check that it is valid
+               RemoteClient *client = i.getNode()->getValue();
+               assert(client->peer_id == i.getNode()->getKey());
+               if(client->serialization_version == SER_FMT_VER_INVALID)
+                       continue;
+               // Get player
+               Player *player = m_env.getPlayer(client->peer_id);
+               // Get name of player
+               std::wstring name = L"unknown";
+               if(player != NULL)
+                       name = narrow_to_wide(player->getName());
+               // Add name to information string
+               os<<name<<L",";
+       }
+       os<<L"}";
+       if(((ServerMap*)(&m_env.getMap()))->isSavingEnabled() == false)
+               os<<" WARNING: Map saving is disabled."<<std::endl;
+       return os.str();
+}
+
+
+void setCreativeInventory(Player *player)
+{
+       player->resetInventory();
+       
+       // Give some good picks
+       {
+               InventoryItem *item = new ToolItem("STPick", 0);
+               void* r = player->inventory.addItem("main", item);
+               assert(r == NULL);
+       }
+       {
+               InventoryItem *item = new ToolItem("MesePick", 0);
+               void* r = player->inventory.addItem("main", item);
+               assert(r == NULL);
+       }
+
+       /*
+               Give materials
+       */
+       
+       // CONTENT_IGNORE-terminated list
+       u8 material_items[] = {
+               CONTENT_TORCH,
+               CONTENT_MUD,
+               CONTENT_STONE,
+               CONTENT_SAND,
+               CONTENT_TREE,
+               CONTENT_LEAVES,
+               CONTENT_MESE,
+               CONTENT_WATERSOURCE,
+               CONTENT_CLOUD,
+               CONTENT_FURNACE,
+               CONTENT_SIGN_WALL,
+               CONTENT_IGNORE
+       };
+       
+       u8 *mip = material_items;
+       for(u16 i=0; i<PLAYER_INVENTORY_SIZE; i++)
+       {
+               if(*mip == CONTENT_IGNORE)
+                       break;
+
+               InventoryItem *item = new MaterialItem(*mip, 1);
+               player->inventory.addItem("main", item);
+
+               mip++;
+       }
+
+#if 0
+       assert(USEFUL_CONTENT_COUNT <= PLAYER_INVENTORY_SIZE);
+       
+       // add torch first
+       InventoryItem *item = new MaterialItem(CONTENT_TORCH, 1);
+       player->inventory.addItem("main", item);
+       
+       // Then others
+       for(u16 i=0; i<USEFUL_CONTENT_COUNT; i++)
+       {
+               // Skip some materials
+               if(i == CONTENT_WATER || i == CONTENT_TORCH
+                       || i == CONTENT_COALSTONE)
+                       continue;
+
+               InventoryItem *item = new MaterialItem(i, 1);
+               player->inventory.addItem("main", item);
+       }
+#endif
+
+       // Sign
+       {
+               InventoryItem *item = new MapBlockObjectItem("Sign Example text");
+               void* r = player->inventory.addItem("main", item);
+               assert(r == NULL);
+       }
+}
+
+Player *Server::emergePlayer(const char *name, const char *password,
+               u16 peer_id)
 {
        /*
                Try to get an existing player
@@ -2964,9 +3393,34 @@ Player *Server::emergePlayer(const char *name, const char *password)
        Player *player = m_env.getPlayer(name);
        if(player != NULL)
        {
+               // If player is already connected, cancel
+               if(player->peer_id != 0)
+               {
+                       dstream<<"emergePlayer(): Player already connected"<<std::endl;
+                       return NULL;
+               }
+
                // Got one.
+               player->peer_id = peer_id;
+               
+               // Reset inventory to creative if in creative mode
+               if(g_settings.getBool("creative_mode"))
+               {
+                       setCreativeInventory(player);
+               }
+
                return player;
        }
+
+       /*
+               If player with the wanted peer_id already exists, cancel.
+       */
+       if(m_env.getPlayer(peer_id) != NULL)
+       {
+               dstream<<"emergePlayer(): Player with wrong name but same"
+                               " peer_id already exists"<<std::endl;
+               return NULL;
+       }
        
        /*
                Create a new player
@@ -2974,74 +3428,97 @@ Player *Server::emergePlayer(const char *name, const char *password)
        {
                player = new ServerRemotePlayer();
                //player->peer_id = c.peer_id;
-               player->peer_id = PEER_ID_INEXISTENT;
+               //player->peer_id = PEER_ID_INEXISTENT;
+               player->peer_id = peer_id;
                player->updateName(name);
 
                /*
                        Set player position
                */
+               
+               dstream<<"Server: Finding spawn place for player \""
+                               <<player->getName()<<"\""<<std::endl;
+
+               v2s16 nodepos;
 #if 0
-               // We're going to throw the player to this position
-               //v2s16 nodepos(29990,29990);
-               //v2s16 nodepos(9990,9990);
-               v2s16 nodepos(0,0);
-               v2s16 sectorpos = getNodeSectorPos(nodepos);
-               // Get sector
-               m_env.getMap().emergeSector(sectorpos);
-               // Get ground height at point
-               f32 groundheight = m_env.getMap().getGroundHeight(nodepos, true);
-               // The sector should have been generated -> groundheight exists
-               assert(groundheight > GROUNDHEIGHT_VALID_MINVALUE);
-               // Don't go underwater
-               if(groundheight < WATER_LEVEL)
-                       groundheight = WATER_LEVEL;
+               player->setPosition(intToFloat(v3s16(
+                               0,
+                               45, //64,
+                               0
+               ), BS));
 #endif
-
 #if 1
-               v2s16 nodepos;
-               f32 groundheight = 0;
+               s16 groundheight = 0;
+#if 1
                // Try to find a good place a few times
-               for(s32 i=0; i<100; i++)
+               for(s32 i=0; i<1000; i++)
                {
-                       s32 range = 1 + i*5;
+                       s32 range = 1 + i;
                        // We're going to try to throw the player to this position
-                       nodepos = v2s16(-range/2 + (myrand()%range),
-                                       -range/2 + (myrand()%range));
+                       nodepos = v2s16(-range + (myrand()%(range*2)),
+                                       -range + (myrand()%(range*2)));
                        v2s16 sectorpos = getNodeSectorPos(nodepos);
-                       // Get sector
-                       m_env.getMap().emergeSector(sectorpos);
-                       // Get ground height at point
-                       groundheight = m_env.getMap().getGroundHeight(nodepos, true);
-                       // The sector should have been generated -> groundheight exists
-                       assert(groundheight > GROUNDHEIGHT_VALID_MINVALUE);
+                       // Get sector (NOTE: Don't get because it's slow)
+                       //m_env.getMap().emergeSector(sectorpos);
+                       // Get ground height at point (fallbacks to heightmap function)
+                       groundheight = m_env.getServerMap().findGroundLevel(nodepos);
                        // Don't go underwater
                        if(groundheight < WATER_LEVEL)
+                       {
+                               //dstream<<"-> Underwater"<<std::endl;
                                continue;
+                       }
+                       // Don't go to high places
+                       if(groundheight > WATER_LEVEL + 4)
+                       {
+                               //dstream<<"-> Underwater"<<std::endl;
+                               continue;
+                       }
+
+#if 0
+// Doesn't work, generating blocks is a bit too complicated for doing here
+                       // Get block at point
+                       v3s16 nodepos3d;
+                       nodepos3d = v3s16(nodepos.X, groundheight+1, nodepos.Y);
+                       v3s16 blockpos = getNodeBlockPos(nodepos3d);
+                       ((ServerMap*)(&m_env.getMap()))->emergeBlock(blockpos);
                        // Don't go inside ground
                        try{
-                               v3s16 footpos(nodepos.X, groundheight+1, nodepos.Y);
-                               v3s16 headpos(nodepos.X, groundheight+2, nodepos.Y);
+                               /*v3s16 footpos(nodepos.X, groundheight+1, nodepos.Y);
+                               v3s16 headpos(nodepos.X, groundheight+2, nodepos.Y);*/
+                               v3s16 footpos = nodepos3d + v3s16(0,0,0);
+                               v3s16 headpos = nodepos3d + v3s16(0,1,0);
                                if(m_env.getMap().getNode(footpos).d != CONTENT_AIR
                                        || m_env.getMap().getNode(headpos).d != CONTENT_AIR)
                                {
+                                       dstream<<"-> Inside ground"<<std::endl;
                                        // In ground
                                        continue;
                                }
                        }catch(InvalidPositionException &e)
                        {
+                               dstream<<"-> Invalid position"<<std::endl;
                                // Ignore invalid position
                                continue;
                        }
+#endif
+
                        // Found a good place
+                       dstream<<"Searched through "<<i<<" places."<<std::endl;
                        break;
                }
 #endif
+               
+               // If no suitable place was not found, go above water at least.
+               if(groundheight < WATER_LEVEL)
+                       groundheight = WATER_LEVEL;
 
                player->setPosition(intToFloat(v3s16(
                                nodepos.X,
-                               groundheight + 1,
+                               groundheight + 5, // Accomodate mud
                                nodepos.Y
-               )));
+               ), BS));
+#endif
 
                /*
                        Add player to environment
@@ -3055,46 +3532,15 @@ Player *Server::emergePlayer(const char *name, const char *password)
                
                if(g_settings.getBool("creative_mode"))
                {
-                       // Give some good picks
-                       {
-                               InventoryItem *item = new ToolItem("STPick", 0);
-                               void* r = player->inventory.addItem("main", item);
-                               assert(r == NULL);
-                       }
-                       {
-                               InventoryItem *item = new ToolItem("MesePick", 0);
-                               void* r = player->inventory.addItem("main", item);
-                               assert(r == NULL);
-                       }
-
-                       /*
-                               Give materials
-                       */
-                       assert(USEFUL_CONTENT_COUNT <= PLAYER_INVENTORY_SIZE);
-                       
-                       // add torch first
-                       InventoryItem *item = new MaterialItem(CONTENT_TORCH, 1);
-                       player->inventory.addItem("main", item);
-                       
-                       // Then others
-                       for(u16 i=0; i<USEFUL_CONTENT_COUNT; i++)
-                       {
-                               // Skip some materials
-                               if(i == CONTENT_OCEAN || i == CONTENT_TORCH)
-                                       continue;
-
-                               InventoryItem *item = new MaterialItem(i, 1);
-                               player->inventory.addItem("main", item);
-                       }
-                       // Sign
-                       {
-                               InventoryItem *item = new MapBlockObjectItem("Sign Example text");
-                               void* r = player->inventory.addItem("main", item);
-                               assert(r == NULL);
-                       }
+                       setCreativeInventory(player);
                }
                else
                {
+                       /*{
+                               InventoryItem *item = new ToolItem("WPick", 32000);
+                               void* r = player->inventory.addItem("main", item);
+                               assert(r == NULL);
+                       }*/
                        /*{
                                InventoryItem *item = new MaterialItem(CONTENT_MESE, 6);
                                void* r = player->inventory.addItem("main", item);
@@ -3147,9 +3593,11 @@ Player *Server::emergePlayer(const char *name, const char *password)
                }
 
                return player;
-       }
+               
+       } // create new player
 }
 
+#if 0
 void Server::UpdateBlockWaterPressure(MapBlock *block,
                        core::map<v3s16, MapBlock*> &modified_blocks)
 {
@@ -3171,6 +3619,7 @@ void Server::UpdateBlockWaterPressure(MapBlock *block,
        
        v.blitBack(modified_blocks);
 }
+#endif
 
 void Server::handlePeerChange(PeerChange &c)
 {
@@ -3230,7 +3679,8 @@ void Server::handlePeerChange(PeerChange &c)
                // Set player client disconnected
                {
                        Player *player = m_env.getPlayer(c.peer_id);
-                       player->peer_id = 0;
+                       if(player != NULL)
+                               player->peer_id = 0;
                }
                
                // Delete client
@@ -3264,4 +3714,50 @@ void Server::handlePeerChanges()
        }
 }
 
+void dedicated_server_loop(Server &server, bool &kill)
+{
+       DSTACK(__FUNCTION_NAME);
+       
+       std::cout<<DTIME<<std::endl;
+       std::cout<<"========================"<<std::endl;
+       std::cout<<"Running dedicated server"<<std::endl;
+       std::cout<<"========================"<<std::endl;
+       std::cout<<std::endl;
+
+       for(;;)
+       {
+               // This is kind of a hack but can be done like this
+               // because server.step() is very light
+               sleep_ms(30);
+               server.step(0.030);
+
+               if(server.getShutdownRequested() || kill)
+               {
+                       std::cout<<DTIME<<" dedicated_server_loop(): Quitting."<<std::endl;
+                       break;
+               }
+
+               static int counter = 0;
+               counter--;
+               if(counter <= 0)
+               {
+                       counter = 10;
+
+                       core::list<PlayerInfo> list = server.getPlayerInfo();
+                       core::list<PlayerInfo>::Iterator i;
+                       static u32 sum_old = 0;
+                       u32 sum = PIChecksum(list);
+                       if(sum != sum_old)
+                       {
+                               std::cout<<DTIME<<"Player info:"<<std::endl;
+                               for(i=list.begin(); i!=list.end(); i++)
+                               {
+                                       i->PrintLine(&std::cout);
+                               }
+                       }
+                       sum_old = sum;
+               }
+       }
+}
+