private bool ReceiveMessage_TransferMessageToServer(NetworkNode.ConnectedNode sender,
            MessageType messageType, ReceiveDataReader reader, ref string error)
        {
            string message = reader.ReadString();
            string data = reader.ReadString();
            if (!reader.Complete())
                return false;

            if (ReceiveMessage != null)
                ReceiveMessage(this, sender, message, data);

            return true;
        }

        bool ReceiveMessage_TransferMessageToClient( NetworkNode.ConnectedNode sender,
            MessageType messageType, ReceiveDataReader reader, ref string additionalErrorMessage)
        {
            string message = reader.ReadString();
            string data = reader.ReadString();
            if( !reader.Complete() )
                return false;

            if( ReceiveMessage != null )
                ReceiveMessage( this, message, data );

            return true;
        }

        bool ReceiveMessage_TextToClient( NetworkNode.ConnectedNode sender,
			MessageType messageType, ReceiveDataReader reader, ref string additionalErrorMessage )
        {
            //get data from message
            uint fromUserIdentifier = reader.ReadVariableUInt32();
            string text = reader.ReadString();
            if( !reader.Complete() )
                return false;

            //get user by identifier
            UserManagementClientNetworkService.UserInfo fromUser = userManagementService.GetUser(
                fromUserIdentifier );
            if( fromUser == null )
            {
                //error. no such user.
                return true;
            }

            if( ReceiveText != null )
                ReceiveText( this, fromUser, text );

            return true;
        }

        private bool ReceiveMessage_TextToServer(NetworkNode.ConnectedNode sender,
            MessageType messageType, ReceiveDataReader reader, ref string additionalErrorMessage)
        {
            //get source user
            UserManagementServerNetworkService.UserInfo fromUser = userManagementService.
                GetUser(sender);

            //get data of message
            string text = reader.ReadString();
            uint privateToUserIdentifier = reader.ReadVariableUInt32();
            if (!reader.Complete())
                return false;

            //send text to the clients
            if (privateToUserIdentifier != 0)
            {
                //send text to the specific user

                UserManagementServerNetworkService.UserInfo privateToUser = userManagementService.
                    GetUser(privateToUserIdentifier);
                if (privateToUser != null)
                {
                    SendText(fromUser, text, privateToUser);
                }
                else
                {
                    //no user anymore
                }
            }
            else
            {
                SendText(fromUser, text, null);
            }

            return true;
        }

        void Client_ReceiveNoAmmoEvent( RemoteEntityWorld sender, ReceiveDataReader reader )
        {
            if( !reader.Complete() )
                return;

            SoundPlay3D( Type.SoundEmpty, .5f, true );
        }

		void Client_ReceiveWheelsPositionToClient( RemoteEntityWorld sender, ReceiveDataReader reader )
		{
			networkingClient_wheelsRotationAngle = new Radian[ 4 ];
			networkingClient_wheelsSteer = new Radian[ 4 ];
			networkingClient_wheelsSuspensionJounce = new float[ 4 ];
			for( int n = 0; n < 4; n++ )
			{
				networkingClient_wheelsRotationAngle[ n ] = reader.ReadRadian();
				networkingClient_wheelsSteer[ n ] = reader.ReadRadian();
				networkingClient_wheelsSuspensionJounce[ n ] = reader.ReadSingle();
			}
			if( !reader.Complete() )
				return;
		}

        void Client_ReceiveFireEvent( RemoteEntityWorld sender, ReceiveDataReader reader )
        {
            bool alternative = reader.ReadBoolean();
            if( !reader.Complete() )
                return;

            GunType.GunMode typeMode = alternative ? Type.AlternativeMode : Type.NormalMode;
            OnFire( typeMode );
        }

 void Client_ReceiveLife( RemoteEntityWorld sender, ReceiveDataReader reader )
 {
     float value = reader.ReadSingle();
     if( !reader.Complete() )
         return;
     Life = value;
 }

 void Client_ReceiveSoundPlayCollision( RemoteEntityWorld sender, ReceiveDataReader reader )
 {
     if( !reader.Complete() )
         return;
     SoundPlay3D( Type.SoundCollision, .5f, false );
 }

        bool ReceiveMessage_WorldCreateEndToClient( NetworkNode.ConnectedNode sender,
			MessageType messageType, ReceiveDataReader reader, ref string additionalErrorMessage )
        {
            if( !reader.Complete() )
                return false;

            if( WorldCreateEnd != null )
                WorldCreateEnd( this );

            return true;
        }

        void Client_ReceiveFaction(RemoteEntityWorld sender, ReceiveDataReader reader)
        {
            string s = reader.ReadString();
            if (!reader.Complete())
                return;

            text = s;
        }

        void Client_ReceiveMoveBegin( RemoteEntityWorld sender, ReceiveDataReader reader )
        {
            uint userId = reader.ReadVariableUInt32();
            if( !reader.Complete() )
                return;

            UserManagementClientNetworkService userService = GameNetworkClient.Instance.
                UserManagementService;

            client_movingByUser = userService.GetUser( userId );
        }

        void Client_ReceiveMoveFinish( RemoteEntityWorld sender, ReceiveDataReader reader )
        {
            bool putToDestinationPlace = reader.ReadBoolean();
            bool completePuzzle = reader.ReadBoolean();
            if( !reader.Complete() )
                return;

            client_movingByUser = null;

            //play sounds
            if( putToDestinationPlace )
                ClientOrSingle_SoundPlay( "Maps\\JigsawPuzzleGame\\PutToDestinationPlace.ogg" );
            if( completePuzzle )
                ClientOrSingle_SoundPlay( "Maps\\JigsawPuzzleGame\\CompletePuzzle.ogg" );
        }

 void Client_ReceiveSoundPlayTake( RemoteEntityWorld sender, ReceiveDataReader reader )
 {
     if( !reader.Complete() )
         return;
     SoundPlay3D( Type.SoundTake, .5f, true );
 }

 void Client_ReceiveIndex( RemoteEntityWorld sender, ReceiveDataReader reader )
 {
     Vec2I value = reader.ReadVec2I();
     if( !reader.Complete() )
         return;
     index = value;
 }

 void Client_ReceivePieceCount( RemoteEntityWorld sender, ReceiveDataReader reader )
 {
     Vec2i value = reader.ReadVec2i();
     if( !reader.Complete() )
         return;
     pieceCount = value;
 }

 void Server_ReceiveUseStart( RemoteEntityWorld sender, ReceiveDataReader reader )
 {
     //not safe. every player from any place can to send this message.
     if( !reader.Complete() )
         return;
     UseStart();
 }

 void Client_ReceiveVelocityCoefficient( RemoteEntityWorld sender, ReceiveDataReader reader )
 {
     float value = reader.ReadSignedSingle( 16 );
     if( !reader.Complete() )
         return;
     client_velocityCoefficient = value;
 }

 void Client_ReceiveReloadEvent( RemoteEntityWorld sender, ReceiveDataReader reader )
 {
     if( !reader.Complete() )
         return;
     OnReload();
 }

 void Client_ReceivePosition( RemoteEntityWorld sender, ReceiveDataReader reader )
 {
     Vec3 value = reader.ReadVec3();
     if( !reader.Complete() )
         return;
     Position = value;
 }