public static Packet MakeAddEntity( byte id, [NotNull] string name, Position pos )
{
if( name == null ) throw new ArgumentNullException( "name" );
Packet packet = new Packet( OpCode.AddEntity );
packet.Bytes[1] = id;
Encoding.ASCII.GetBytes( name.PadRight( 64 ), 0, 64, packet.Bytes, 2 );
ToNetOrder( pos.X, packet.Bytes, 66 );
ToNetOrder( pos.Z, packet.Bytes, 68 );
ToNetOrder( pos.Y, packet.Bytes, 70 );
packet.Bytes[72] = pos.R;
packet.Bytes[73] = pos.L;
return packet;
}
public Map( int width, int length, int height )
{
if( width < 16 || width > 2048 || length < 16 || length > 2048 || height < 16 || height > 2048 ) {
throw new ArgumentException( "Invalid map dimension(s)." );
}
Width = width;
Length = length;
Height = height;
Volume = width*length*height;
WaterLevel = Height/2;
Blocks = new byte[Volume];
Spawn = new Position( Width*16, Length*16, Math.Min( Height*32, Int16.MaxValue ) );
}
public static Map Load( [NotNull] string fileName )
{
if( fileName == null ) throw new ArgumentNullException( "fileName" );
using( FileStream mapStream = File.OpenRead( fileName ) ) {
byte[] temp = new byte[8];
Map map = null;
mapStream.Seek( -4, SeekOrigin.End );
mapStream.Read( temp, 0, 4 );
mapStream.Seek( 0, SeekOrigin.Begin );
int uncompressedLength = BitConverter.ToInt32( temp, 0 );
byte[] data = new byte[uncompressedLength];
using( GZipStream reader = new GZipStream( mapStream, CompressionMode.Decompress, true ) ) {
reader.Read( data, 0, uncompressedLength );
}
for( int i = 0; i < uncompressedLength - 1; i++ ) {
if( data[i] != 0xAC || data[i + 1] != 0xED ) continue;
// bypassing the header crap
int pointer = i + 6;
Array.Copy( data, pointer, temp, 0, 2 );
pointer += IPAddress.HostToNetworkOrder( BitConverter.ToInt16( temp, 0 ) );
pointer += 13;
int headerEnd;
// find the end of serialization listing
for( headerEnd = pointer; headerEnd < data.Length - 1; headerEnd++ ) {
if( data[headerEnd] == 0x78 && data[headerEnd + 1] == 0x70 ) {
headerEnd += 2;
break;
}
}
// start parsing serialization listing
int offset = 0;
int width = 0, length = 0, height = 0;
Position spawn = new Position();
while( pointer < headerEnd ) {
switch( (char)data[pointer] ) {
case 'Z':
offset++;
break;
case 'F':
case 'I':
offset += 4;
break;
case 'J':
offset += 8;
break;
}
pointer += 1;
Array.Copy( data, pointer, temp, 0, 2 );
short skip = IPAddress.HostToNetworkOrder( BitConverter.ToInt16( temp, 0 ) );
pointer += 2;
// look for relevant variables
Array.Copy( data, headerEnd + offset - 4, temp, 0, 4 );
if( MemCmp( data, pointer, "width" ) ) {
width = (ushort)IPAddress.HostToNetworkOrder( BitConverter.ToInt32( temp, 0 ) );
} else if( MemCmp( data, pointer, "depth" ) ) {
height = (ushort)IPAddress.HostToNetworkOrder( BitConverter.ToInt32( temp, 0 ) );
} else if( MemCmp( data, pointer, "height" ) ) {
length = (ushort)IPAddress.HostToNetworkOrder( BitConverter.ToInt32( temp, 0 ) );
} else if( MemCmp( data, pointer, "xSpawn" ) ) {
spawn.X =
(short)(IPAddress.HostToNetworkOrder( BitConverter.ToInt32( temp, 0 ) )*32 + 16);
} else if( MemCmp( data, pointer, "ySpawn" ) ) {
spawn.Z =
(short)(IPAddress.HostToNetworkOrder( BitConverter.ToInt32( temp, 0 ) )*32 + 16);
} else if( MemCmp( data, pointer, "zSpawn" ) ) {
spawn.Y =
(short)(IPAddress.HostToNetworkOrder( BitConverter.ToInt32( temp, 0 ) )*32 + 16);
}
pointer += skip;
}
map = new Map( width, length, height ) { Spawn = spawn };
// find the start of the block array
bool foundBlockArray = false;
offset = Array.IndexOf<byte>( data, 0x00, headerEnd );
while( offset != -1 && offset < data.Length - 2 ) {
if( data[offset] == 0x00 && data[offset + 1] == 0x78 && data[offset + 2] == 0x70 ) {
foundBlockArray = true;
pointer = offset + 7;
}
offset = Array.IndexOf<byte>( data, 0x00, offset + 1 );
}
// copy the block array... or fail
if( !foundBlockArray ) {
throw new Exception( "DatMapConverter: Could not locate block array." );
}
Array.Copy( data, pointer, map.Blocks, 0, map.Blocks.Length );
// Map survivaltest/indev blocktypes to standard/presentation blocktypes
map.ConvertBlockTypes( Mapping );
if( Config.Physics ) map.EnablePhysics();
break;
}
if( map == null ) {
throw new Exception( "DatMapConverter: Error loading map." );
}
return map;
}
}
void SendMap()
{
// write MapBegin
//Logger.Log( "Send: MapBegin()" );
writer.Write( OpCode.MapBegin );
// grab a compressed copy of the map
byte[] blockData;
Map map = Server.Map;
using( MemoryStream mapStream = new MemoryStream() ) {
using( GZipStream compressor = new GZipStream( mapStream, CompressionMode.Compress ) ) {
int convertedBlockCount = IPAddress.HostToNetworkOrder( map.Volume );
compressor.Write( BitConverter.GetBytes( convertedBlockCount ), 0, 4 );
byte[] rawData = ( UsesCustomBlocks ? map.Blocks : map.GetFallbackMap() );
compressor.Write( rawData, 0, rawData.Length );
}
blockData = mapStream.ToArray();
}
// Transfer the map copy
byte[] buffer = new byte[1024];
int mapBytesSent = 0;
while( mapBytesSent < blockData.Length ) {
int chunkSize = blockData.Length - mapBytesSent;
if( chunkSize > 1024 ) {
chunkSize = 1024;
} else {
// CRC fix for ManicDigger
for( int i = 0; i < buffer.Length; i++ ) {
buffer[i] = 0;
}
}
Buffer.BlockCopy( blockData, mapBytesSent, buffer, 0, chunkSize );
byte progress = (byte)( 100 * mapBytesSent / blockData.Length );
// write in chunks of 1024 bytes or less
//Logger.Log( "Send: MapChunk({0},{1})", chunkSize, progress );
writer.Write( OpCode.MapChunk );
writer.Write( (short)chunkSize );
writer.Write( buffer, 0, 1024 );
writer.Write( progress );
mapBytesSent += chunkSize;
}
// write MapEnd
writer.Write( OpCode.MapEnd );
writer.Write( (short)map.Width );
writer.Write( (short)map.Height );
writer.Write( (short)map.Length );
// write spawn point
writer.Write( Packet.MakeAddEntity( 255, Name, map.Spawn ).Bytes );
writer.Write( Packet.MakeTeleport( 255, map.Spawn ).Bytes );
lastValidPosition = map.Spawn;
}
void ProcessMovementPacket()
{
reader.ReadByte();
Position newPos = new Position {
X = reader.ReadInt16(),
Z = reader.ReadInt16(),
Y = reader.ReadInt16(),
R = reader.ReadByte(),
L = reader.ReadByte()
};
Position oldPos = Position;
// calculate difference between old and new positions
Position delta = new Position {
X = (short)( newPos.X - oldPos.X ),
Y = (short)( newPos.Y - oldPos.Y ),
Z = (short)( newPos.Z - oldPos.Z ),
R = (byte)Math.Abs( newPos.R - oldPos.R ),
L = (byte)Math.Abs( newPos.L - oldPos.L )
};
bool posChanged = ( delta.X != 0 ) || ( delta.Y != 0 ) || ( delta.Z != 0 );
bool rotChanged = ( delta.R != 0 ) || ( delta.L != 0 );
// skip everything if player hasn't moved
if( !posChanged && !rotChanged ) return;
// only reset the timer if player rotated
// if player is just pushed around, rotation does not change (and timer should not reset)
if( rotChanged ) ResetIdleTimer();
if( !IsOp && !Config.AllowSpeedHack || IsOp && !Config.OpAllowSpeedHack ) {
int distSquared = delta.X * delta.X + delta.Y * delta.Y + delta.Z * delta.Z;
// speedhack detection
if( DetectMovementPacketSpam() ) return;
if( ( distSquared - delta.Z * delta.Z > AntiSpeedMaxDistanceSquared ||
delta.Z > AntiSpeedMaxJumpDelta ) && speedHackDetectionCounter >= 0 ) {
if( speedHackDetectionCounter == 0 ) {
lastValidPosition = Position;
} else if( speedHackDetectionCounter > 1 ) {
DenyMovement();
speedHackDetectionCounter = 0;
return;
}
speedHackDetectionCounter++;
} else {
speedHackDetectionCounter = 0;
}
}
BroadcastMovementChange( newPos, delta );
}
void BroadcastMovementChange( Position newPos, Position delta )
{
Position = newPos;
bool posChanged = ( delta.X != 0 ) || ( delta.Y != 0 ) || ( delta.Z != 0 );
bool rotChanged = ( delta.R != 0 ) || ( delta.L != 0 );
Packet packet;
// create the movement packet
if( delta.FitsIntoMoveRotatePacket && positionSyncCounter < PositionSyncInterval ) {
if( posChanged && rotChanged ) {
// incremental position + rotation update
packet = Packet.MakeMoveRotate( Id, new Position {
X = delta.X,
Y = delta.Y,
Z = delta.Z,
R = newPos.R,
L = newPos.L
} );
} else if( posChanged ) {
// incremental position update
packet = Packet.MakeMove( Id, delta );
} else if( rotChanged ) {
// absolute rotation update
packet = Packet.MakeRotate( Id, newPos );
} else {
return;
}
} else {
// full (absolute position + rotation) update
packet = Packet.MakeTeleport( Id, newPos );
}
positionSyncCounter++;
if( positionSyncCounter >= PositionSyncInterval ) {
positionSyncCounter = 0;
}
Server.Players.Send( this, packet );
}
public static Packet MakeTeleport( byte id, Position pos )
{
Packet packet = new Packet( OpCode.Teleport );
packet.Bytes[1] = id;
ToNetOrder( pos.X, packet.Bytes, 2 );
ToNetOrder( pos.Z, packet.Bytes, 4 );
ToNetOrder( pos.Y, packet.Bytes, 6 );
packet.Bytes[8] = pos.R;
packet.Bytes[9] = pos.L;
return packet;
}
public static Packet MakeSelfTeleport( Position pos )
{
return MakeTeleport( 255, pos.GetFixed() );
}
public static Packet MakeRotate( int id, Position pos )
{
Packet packet = new Packet( OpCode.Rotate );
packet.Bytes[1] = (byte)id;
packet.Bytes[2] = pos.R;
packet.Bytes[3] = pos.L;
return packet;
}
public static Packet MakeMoveRotate( int id, Position pos )
{
Packet packet = new Packet( OpCode.MoveRotate );
packet.Bytes[1] = (byte)id;
packet.Bytes[2] = (byte)( pos.X & 0xFF );
packet.Bytes[3] = (byte)( pos.Z & 0xFF );
packet.Bytes[4] = (byte)( pos.Y & 0xFF );
packet.Bytes[5] = pos.R;
packet.Bytes[6] = pos.L;
return packet;
}
public static Packet MakeMove( int id, Position pos )
{
Packet packet = new Packet( OpCode.Move );
packet.Bytes[1] = (byte)id;
packet.Bytes[2] = (byte)pos.X;
packet.Bytes[3] = (byte)pos.Z;
packet.Bytes[4] = (byte)pos.Y;
return packet;
}