/// <summary>
/// Process chunk column data from the server and (un)load the chunk from the Minecraft world
/// </summary>
/// <param name="chunkX">Chunk X location</param>
/// <param name="chunkZ">Chunk Z location</param>
/// <param name="chunkMask">Chunk mask for reading data</param>
/// <param name="chunkMask2">Chunk mask for some additional 1.7 metadata</param>
/// <param name="hasSkyLight">Contains skylight info</param>
/// <param name="chunksContinuous">Are the chunk continuous</param>
/// <param name="currentDimension">Current dimension type (0 = overworld)</param>
/// <param name="cache">Cache for reading chunk data</param>
public void ProcessChunkColumnData(int chunkX, int chunkZ, ushort chunkMask, ushort chunkMask2, bool hasSkyLight, bool chunksContinuous, int currentDimension, Queue <byte> cache)
{
if (protocolversion >= Protocol18Handler.MC19Version)
{
// 1.9 and above chunk format
// Unloading chunks is handled by a separate packet
for (int chunkY = 0; chunkY < ChunkColumn.ColumnSize; chunkY++)
{
if ((chunkMask & (1 << chunkY)) != 0)
{
// 1.14 and above Non-air block count inside chunk section, for lighting purposes
if (protocolversion >= Protocol18Handler.MC114Version)
{
dataTypes.ReadNextShort(cache);
}
byte bitsPerBlock = dataTypes.ReadNextByte(cache);
bool usePalette = (bitsPerBlock <= 8);
// Vanilla Minecraft will use at least 4 bits per block
if (bitsPerBlock < 4)
{
bitsPerBlock = 4;
}
// MC 1.9 to 1.12 will set palette length field to 0 when palette
// is not used, MC 1.13+ does not send the field at all in this case
int paletteLength = 0; // Assume zero when length is absent
if (usePalette || protocolversion < Protocol18Handler.MC113Version)
{
paletteLength = dataTypes.ReadNextVarInt(cache);
}
int[] palette = new int[paletteLength];
for (int i = 0; i < paletteLength; i++)
{
palette[i] = dataTypes.ReadNextVarInt(cache);
}
// Bit mask covering bitsPerBlock bits
// EG, if bitsPerBlock = 5, valueMask = 00011111 in binary
uint valueMask = (uint)((1 << bitsPerBlock) - 1);
ulong[] dataArray = dataTypes.ReadNextULongArray(cache);
Chunk chunk = new Chunk();
if (dataArray.Length > 0)
{
for (int blockY = 0; blockY < Chunk.SizeY; blockY++)
{
for (int blockZ = 0; blockZ < Chunk.SizeZ; blockZ++)
{
for (int blockX = 0; blockX < Chunk.SizeX; blockX++)
{
int blockNumber = (blockY * Chunk.SizeZ + blockZ) * Chunk.SizeX + blockX;
int startLong = (blockNumber * bitsPerBlock) / 64;
int startOffset = (blockNumber * bitsPerBlock) % 64;
int endLong = ((blockNumber + 1) * bitsPerBlock - 1) / 64;
// TODO: In the future a single ushort may not store the entire block id;
// the Block code may need to change if block state IDs go beyond 65535
ushort blockId;
if (startLong == endLong)
{
blockId = (ushort)((dataArray[startLong] >> startOffset) & valueMask);
}
else
{
int endOffset = 64 - startOffset;
blockId = (ushort)((dataArray[startLong] >> startOffset | dataArray[endLong] << endOffset) & valueMask);
}
if (usePalette)
{
// Get the real block ID out of the palette
blockId = (ushort)palette[blockId];
}
chunk[blockX, blockY, blockZ] = new Block(blockId);
}
}
}
}
//We have our chunk, save the chunk into the world
if (handler.GetWorld()[chunkX, chunkZ] == null)
{
handler.GetWorld()[chunkX, chunkZ] = new ChunkColumn();
}
handler.GetWorld()[chunkX, chunkZ][chunkY] = chunk;
//Pre-1.14 Lighting data
if (protocolversion < Protocol18Handler.MC114Version)
{
//Skip block light
dataTypes.ReadData((Chunk.SizeX * Chunk.SizeY * Chunk.SizeZ) / 2, cache);
//Skip sky light
if (currentDimension == 0)
{
// Sky light is not sent in the nether or the end
dataTypes.ReadData((Chunk.SizeX * Chunk.SizeY * Chunk.SizeZ) / 2, cache);
}
}
}
}
// Don't worry about skipping remaining data since there is no useful data afterwards in 1.9
// (plus, it would require parsing the tile entity lists' NBT)
}
else if (protocolversion >= Protocol18Handler.MC18Version)
{
// 1.8 chunk format
if (chunksContinuous && chunkMask == 0)
{
//Unload the entire chunk column
handler.GetWorld()[chunkX, chunkZ] = null;
}
else
{
//Load chunk data from the server
for (int chunkY = 0; chunkY < ChunkColumn.ColumnSize; chunkY++)
{
if ((chunkMask & (1 << chunkY)) != 0)
{
Chunk chunk = new Chunk();
//Read chunk data, all at once for performance reasons, and build the chunk object
Queue <ushort> queue = new Queue <ushort>(dataTypes.ReadNextUShortsLittleEndian(Chunk.SizeX * Chunk.SizeY * Chunk.SizeZ, cache));
for (int blockY = 0; blockY < Chunk.SizeY; blockY++)
{
for (int blockZ = 0; blockZ < Chunk.SizeZ; blockZ++)
{
for (int blockX = 0; blockX < Chunk.SizeX; blockX++)
{
chunk[blockX, blockY, blockZ] = new Block(queue.Dequeue());
}
}
}
//We have our chunk, save the chunk into the world
if (handler.GetWorld()[chunkX, chunkZ] == null)
{
handler.GetWorld()[chunkX, chunkZ] = new ChunkColumn();
}
handler.GetWorld()[chunkX, chunkZ][chunkY] = chunk;
}
}
//Skip light information
for (int chunkY = 0; chunkY < ChunkColumn.ColumnSize; chunkY++)
{
if ((chunkMask & (1 << chunkY)) != 0)
{
//Skip block light
dataTypes.ReadData((Chunk.SizeX * Chunk.SizeY * Chunk.SizeZ) / 2, cache);
//Skip sky light
if (hasSkyLight)
{
dataTypes.ReadData((Chunk.SizeX * Chunk.SizeY * Chunk.SizeZ) / 2, cache);
}
}
}
//Skip biome metadata
if (chunksContinuous)
{
dataTypes.ReadData(Chunk.SizeX * Chunk.SizeZ, cache);
}
}
}
else
{
// 1.7 chunk format
if (chunksContinuous && chunkMask == 0)
{
//Unload the entire chunk column
handler.GetWorld()[chunkX, chunkZ] = null;
}
else
{
//Count chunk sections
int sectionCount = 0;
int addDataSectionCount = 0;
for (int chunkY = 0; chunkY < ChunkColumn.ColumnSize; chunkY++)
{
if ((chunkMask & (1 << chunkY)) != 0)
{
sectionCount++;
}
if ((chunkMask2 & (1 << chunkY)) != 0)
{
addDataSectionCount++;
}
}
//Read chunk data, unpacking 4-bit values into 8-bit values for block metadata
Queue <byte> blockTypes = new Queue <byte>(dataTypes.ReadData(Chunk.SizeX * Chunk.SizeY * Chunk.SizeZ * sectionCount, cache));
Queue <byte> blockMeta = new Queue <byte>();
foreach (byte packed in dataTypes.ReadData((Chunk.SizeX * Chunk.SizeY * Chunk.SizeZ * sectionCount) / 2, cache))
{
byte hig = (byte)(packed >> 4);
byte low = (byte)(packed & (byte)0x0F);
blockMeta.Enqueue(hig);
blockMeta.Enqueue(low);
}
//Skip data we don't need
dataTypes.ReadData((Chunk.SizeX * Chunk.SizeY * Chunk.SizeZ * sectionCount) / 2, cache); //Block light
if (hasSkyLight)
{
dataTypes.ReadData((Chunk.SizeX * Chunk.SizeY * Chunk.SizeZ * sectionCount) / 2, cache); //Sky light
}
dataTypes.ReadData((Chunk.SizeX * Chunk.SizeY * Chunk.SizeZ * addDataSectionCount) / 2, cache); //BlockAdd
if (chunksContinuous)
{
dataTypes.ReadData(Chunk.SizeX * Chunk.SizeZ, cache); //Biomes
}
//Load chunk data
for (int chunkY = 0; chunkY < ChunkColumn.ColumnSize; chunkY++)
{
if ((chunkMask & (1 << chunkY)) != 0)
{
Chunk chunk = new Chunk();
for (int blockY = 0; blockY < Chunk.SizeY; blockY++)
{
for (int blockZ = 0; blockZ < Chunk.SizeZ; blockZ++)
{
for (int blockX = 0; blockX < Chunk.SizeX; blockX++)
{
chunk[blockX, blockY, blockZ] = new Block(blockTypes.Dequeue(), blockMeta.Dequeue());
}
}
}
if (handler.GetWorld()[chunkX, chunkZ] == null)
{
handler.GetWorld()[chunkX, chunkZ] = new ChunkColumn();
}
handler.GetWorld()[chunkX, chunkZ][chunkY] = chunk;
}
}
}
}
}
/// <summary>
/// Handle the given packet
/// </summary>
/// <param name="packetID">Packet ID</param>
/// <param name="packetData">Packet contents</param>
/// <returns>TRUE if the packet was processed, FALSE if ignored or unknown</returns>
internal bool HandlePacket(int packetID, List <byte> packetData)
{
try
{
if (login_phase)
{
switch (packetID) //Packet IDs are different while logging in
{
case 0x03:
if (protocolversion >= MC18Version)
{
compression_treshold = dataTypes.ReadNextVarInt(packetData);
}
break;
default:
return(false); //Ignored packet
}
}
// Regular in-game packets
switch (Protocol18PacketTypes.GetPacketIncomingType(packetID, protocolversion))
{
case PacketIncomingType.KeepAlive:
SendPacket(PacketOutgoingType.KeepAlive, packetData);
break;
case PacketIncomingType.JoinGame:
handler.OnGameJoined();
dataTypes.ReadNextInt(packetData);
dataTypes.ReadNextByte(packetData);
if (protocolversion >= MC191Version)
{
this.currentDimension = dataTypes.ReadNextInt(packetData);
}
else
{
this.currentDimension = (sbyte)dataTypes.ReadNextByte(packetData);
}
if (protocolversion < MC114Version)
{
dataTypes.ReadNextByte(packetData); // Difficulty - 1.13 and below
}
dataTypes.ReadNextByte(packetData);
dataTypes.ReadNextString(packetData);
if (protocolversion >= MC114Version)
{
dataTypes.ReadNextVarInt(packetData); // View distance - 1.14 and above
}
if (protocolversion >= MC18Version)
{
dataTypes.ReadNextBool(packetData); // Reduced debug info - 1.8 and above
}
break;
case PacketIncomingType.ChatMessage:
string message = dataTypes.ReadNextString(packetData);
try
{
//Hide system messages or xp bar messages?
byte messageType = dataTypes.ReadNextByte(packetData);
if ((messageType == 1 && !Settings.DisplaySystemMessages) ||
(messageType == 2 && !Settings.DisplayXPBarMessages))
{
break;
}
}
catch (ArgumentOutOfRangeException) { /* No message type */ }
handler.OnTextReceived(message, true);
break;
case PacketIncomingType.Respawn:
this.currentDimension = dataTypes.ReadNextInt(packetData);
if (protocolversion < MC114Version)
{
dataTypes.ReadNextByte(packetData); // Difficulty - 1.13 and below
}
dataTypes.ReadNextByte(packetData);
dataTypes.ReadNextString(packetData);
handler.OnRespawn();
break;
case PacketIncomingType.PlayerPositionAndLook:
if (handler.GetTerrainEnabled())
{
double x = dataTypes.ReadNextDouble(packetData);
double y = dataTypes.ReadNextDouble(packetData);
double z = dataTypes.ReadNextDouble(packetData);
float yaw = dataTypes.ReadNextFloat(packetData);
float pitch = dataTypes.ReadNextFloat(packetData);
byte locMask = dataTypes.ReadNextByte(packetData);
if (protocolversion >= MC18Version)
{
Location location = handler.GetCurrentLocation();
location.X = (locMask & 1 << 0) != 0 ? location.X + x : x;
location.Y = (locMask & 1 << 1) != 0 ? location.Y + y : y;
location.Z = (locMask & 1 << 2) != 0 ? location.Z + z : z;
handler.UpdateLocation(location, yaw, pitch);
}
else
{
handler.UpdateLocation(new Location(x, y, z), yaw, pitch);
}
}
if (protocolversion >= MC19Version)
{
int teleportID = dataTypes.ReadNextVarInt(packetData);
// Teleport confirm packet
SendPacket(PacketOutgoingType.TeleportConfirm, dataTypes.GetVarInt(teleportID));
}
break;
case PacketIncomingType.ChunkData:
if (handler.GetTerrainEnabled())
{
int chunkX = dataTypes.ReadNextInt(packetData);
int chunkZ = dataTypes.ReadNextInt(packetData);
bool chunksContinuous = dataTypes.ReadNextBool(packetData);
ushort chunkMask = protocolversion >= MC19Version
? (ushort)dataTypes.ReadNextVarInt(packetData)
: dataTypes.ReadNextUShort(packetData);
if (protocolversion < MC18Version)
{
ushort addBitmap = dataTypes.ReadNextUShort(packetData);
int compressedDataSize = dataTypes.ReadNextInt(packetData);
byte[] compressed = dataTypes.ReadData(compressedDataSize, packetData);
byte[] decompressed = ZlibUtils.Decompress(compressed);
pTerrain.ProcessChunkColumnData(chunkX, chunkZ, chunkMask, addBitmap, currentDimension == 0, chunksContinuous, currentDimension, new List <byte>(decompressed));
}
else
{
if (protocolversion >= MC114Version)
{
dataTypes.ReadNextNbt(packetData); // Heightmaps - 1.14 and above
}
int dataSize = dataTypes.ReadNextVarInt(packetData);
pTerrain.ProcessChunkColumnData(chunkX, chunkZ, chunkMask, 0, false, chunksContinuous, currentDimension, packetData);
}
}
break;
case PacketIncomingType.MultiBlockChange:
if (handler.GetTerrainEnabled())
{
int chunkX = dataTypes.ReadNextInt(packetData);
int chunkZ = dataTypes.ReadNextInt(packetData);
int recordCount = protocolversion < MC18Version
? (int)dataTypes.ReadNextShort(packetData)
: dataTypes.ReadNextVarInt(packetData);
for (int i = 0; i < recordCount; i++)
{
byte locationXZ;
ushort blockIdMeta;
int blockY;
if (protocolversion < MC18Version)
{
blockIdMeta = dataTypes.ReadNextUShort(packetData);
blockY = (ushort)dataTypes.ReadNextByte(packetData);
locationXZ = dataTypes.ReadNextByte(packetData);
}
else
{
locationXZ = dataTypes.ReadNextByte(packetData);
blockY = (ushort)dataTypes.ReadNextByte(packetData);
blockIdMeta = (ushort)dataTypes.ReadNextVarInt(packetData);
}
int blockX = locationXZ >> 4;
int blockZ = locationXZ & 0x0F;
Block block = new Block(blockIdMeta);
handler.GetWorld().SetBlock(new Location(chunkX, chunkZ, blockX, blockY, blockZ), block);
}
}
break;
case PacketIncomingType.BlockChange:
if (handler.GetTerrainEnabled())
{
if (protocolversion < MC18Version)
{
int blockX = dataTypes.ReadNextInt(packetData);
int blockY = dataTypes.ReadNextByte(packetData);
int blockZ = dataTypes.ReadNextInt(packetData);
short blockId = (short)dataTypes.ReadNextVarInt(packetData);
byte blockMeta = dataTypes.ReadNextByte(packetData);
handler.GetWorld().SetBlock(new Location(blockX, blockY, blockZ), new Block(blockId, blockMeta));
}
else
{
handler.GetWorld().SetBlock(dataTypes.ReadNextLocation(packetData), new Block((ushort)dataTypes.ReadNextVarInt(packetData)));
}
}
break;
case PacketIncomingType.MapChunkBulk:
if (protocolversion < MC19Version && handler.GetTerrainEnabled())
{
int chunkCount;
bool hasSkyLight;
List <byte> chunkData = packetData;
//Read global fields
if (protocolversion < MC18Version)
{
chunkCount = dataTypes.ReadNextShort(packetData);
int compressedDataSize = dataTypes.ReadNextInt(packetData);
hasSkyLight = dataTypes.ReadNextBool(packetData);
byte[] compressed = dataTypes.ReadData(compressedDataSize, packetData);
byte[] decompressed = ZlibUtils.Decompress(compressed);
chunkData = new List <byte>(decompressed);
}
else
{
hasSkyLight = dataTypes.ReadNextBool(packetData);
chunkCount = dataTypes.ReadNextVarInt(packetData);
}
//Read chunk records
int[] chunkXs = new int[chunkCount];
int[] chunkZs = new int[chunkCount];
ushort[] chunkMasks = new ushort[chunkCount];
ushort[] addBitmaps = new ushort[chunkCount];
for (int chunkColumnNo = 0; chunkColumnNo < chunkCount; chunkColumnNo++)
{
chunkXs[chunkColumnNo] = dataTypes.ReadNextInt(packetData);
chunkZs[chunkColumnNo] = dataTypes.ReadNextInt(packetData);
chunkMasks[chunkColumnNo] = dataTypes.ReadNextUShort(packetData);
addBitmaps[chunkColumnNo] = protocolversion < MC18Version
? dataTypes.ReadNextUShort(packetData)
: (ushort)0;
}
//Process chunk records
for (int chunkColumnNo = 0; chunkColumnNo < chunkCount; chunkColumnNo++)
{
pTerrain.ProcessChunkColumnData(chunkXs[chunkColumnNo], chunkZs[chunkColumnNo], chunkMasks[chunkColumnNo], addBitmaps[chunkColumnNo], hasSkyLight, true, currentDimension, chunkData);
}
}
break;
case PacketIncomingType.UnloadChunk:
if (protocolversion >= MC19Version && handler.GetTerrainEnabled())
{
int chunkX = dataTypes.ReadNextInt(packetData);
int chunkZ = dataTypes.ReadNextInt(packetData);
handler.GetWorld()[chunkX, chunkZ] = null;
}
break;
case PacketIncomingType.PlayerListUpdate:
if (protocolversion >= MC18Version)
{
int action = dataTypes.ReadNextVarInt(packetData);
int numActions = dataTypes.ReadNextVarInt(packetData);
for (int i = 0; i < numActions; i++)
{
Guid uuid = dataTypes.ReadNextUUID(packetData);
switch (action)
{
case 0x00: //Player Join
string name = dataTypes.ReadNextString(packetData);
int propNum = dataTypes.ReadNextVarInt(packetData);
for (int p = 0; p < propNum; p++)
{
string key = dataTypes.ReadNextString(packetData);
string val = dataTypes.ReadNextString(packetData);
if (dataTypes.ReadNextBool(packetData))
{
dataTypes.ReadNextString(packetData);
}
}
dataTypes.ReadNextVarInt(packetData);
dataTypes.ReadNextVarInt(packetData);
if (dataTypes.ReadNextBool(packetData))
{
dataTypes.ReadNextString(packetData);
}
handler.OnPlayerJoin(uuid, name);
break;
case 0x01: //Update gamemode
case 0x02: //Update latency
dataTypes.ReadNextVarInt(packetData);
break;
case 0x03: //Update display name
if (dataTypes.ReadNextBool(packetData))
{
dataTypes.ReadNextString(packetData);
}
break;
case 0x04: //Player Leave
handler.OnPlayerLeave(uuid);
break;
default:
//Unknown player list item type
break;
}
}
}
else //MC 1.7.X does not provide UUID in tab-list updates
{
string name = dataTypes.ReadNextString(packetData);
bool online = dataTypes.ReadNextBool(packetData);
short ping = dataTypes.ReadNextShort(packetData);
Guid FakeUUID = new Guid(MD5.Create().ComputeHash(Encoding.UTF8.GetBytes(name)).Take(16).ToArray());
if (online)
{
handler.OnPlayerJoin(FakeUUID, name);
}
else
{
handler.OnPlayerLeave(FakeUUID);
}
}
break;
case PacketIncomingType.TabCompleteResult:
if (protocolversion >= MC113Version)
{
autocomplete_transaction_id = dataTypes.ReadNextVarInt(packetData);
dataTypes.ReadNextVarInt(packetData); // Start of text to replace
dataTypes.ReadNextVarInt(packetData); // Length of text to replace
}
int autocomplete_count = dataTypes.ReadNextVarInt(packetData);
autocomplete_result.Clear();
for (int i = 0; i < autocomplete_count; i++)
{
autocomplete_result.Add(dataTypes.ReadNextString(packetData));
if (protocolversion >= MC113Version)
{
// Skip optional tooltip for each tab-complete result
if (dataTypes.ReadNextBool(packetData))
{
dataTypes.ReadNextString(packetData);
}
}
}
autocomplete_received = true;
break;
case PacketIncomingType.PluginMessage:
String channel = dataTypes.ReadNextString(packetData);
// Length is unneeded as the whole remaining packetData is the entire payload of the packet.
if (protocolversion < MC18Version)
{
pForge.ReadNextVarShort(packetData);
}
handler.OnPluginChannelMessage(channel, packetData.ToArray());
return(pForge.HandlePluginMessage(channel, packetData, ref currentDimension));
case PacketIncomingType.KickPacket:
handler.OnConnectionLost(ChatBot.DisconnectReason.InGameKick, ChatParser.ParseText(dataTypes.ReadNextString(packetData)));
return(false);
case PacketIncomingType.NetworkCompressionTreshold:
if (protocolversion >= MC18Version && protocolversion < MC19Version)
{
compression_treshold = dataTypes.ReadNextVarInt(packetData);
}
break;
case PacketIncomingType.ResourcePackSend:
string url = dataTypes.ReadNextString(packetData);
string hash = dataTypes.ReadNextString(packetData);
//Send back "accepted" and "successfully loaded" responses for plugins making use of resource pack mandatory
byte[] responseHeader = new byte[0];
if (protocolversion < MC110Version) //MC 1.10 does not include resource pack hash in responses
{
responseHeader = dataTypes.ConcatBytes(dataTypes.GetVarInt(hash.Length), Encoding.UTF8.GetBytes(hash));
}
SendPacket(PacketOutgoingType.ResourcePackStatus, dataTypes.ConcatBytes(responseHeader, dataTypes.GetVarInt(3))); //Accepted pack
SendPacket(PacketOutgoingType.ResourcePackStatus, dataTypes.ConcatBytes(responseHeader, dataTypes.GetVarInt(0))); //Successfully loaded
break;
default:
return(false); //Ignored packet
}
return(true); //Packet processed
}
catch (Exception innerException)
{
throw new System.IO.InvalidDataException(
String.Format("Failed to process incoming packet of type {0}. (PacketID: {1}, Protocol: {2}, LoginPhase: {3}, InnerException: {4}).",
Protocol18PacketTypes.GetPacketIncomingType(packetID, protocolversion),
packetID,
protocolversion,
login_phase,
innerException.GetType()),
innerException);
}
}
/// <summary>
/// Process chunk column data from the server and (un)load the chunk from the Minecraft world
/// </summary>
/// <param name="chunkX">Chunk X location</param>
/// <param name="chunkZ">Chunk Z location</param>
/// <param name="chunkMask">Chunk mask for reading data</param>
/// <param name="chunkMask2">Chunk mask for some additional 1.7 metadata</param>
/// <param name="hasSkyLight">Contains skylight info</param>
/// <param name="chunksContinuous">Are the chunk continuous</param>
/// <param name="currentDimension">Current dimension type (0 = overworld)</param>
/// <param name="cache">Cache for reading chunk data</param>
public void ProcessChunkColumnData(int chunkX, int chunkZ, ushort chunkMask, ushort chunkMask2, bool hasSkyLight, bool chunksContinuous, int currentDimension, Queue <byte> cache)
{
if (protocolversion >= Protocol18Handler.MC19Version)
{
// 1.9 and above chunk format
// Unloading chunks is handled by a separate packet
for (int chunkY = 0; chunkY < ChunkColumn.ColumnSize; chunkY++)
{
if ((chunkMask & (1 << chunkY)) != 0)
{
// 1.14 and above Non-air block count inside chunk section, for lighting purposes
if (protocolversion >= Protocol18Handler.MC114Version)
{
dataTypes.ReadNextShort(cache);
}
byte bitsPerBlock = dataTypes.ReadNextByte(cache);
bool usePalette = (bitsPerBlock <= 8);
// Vanilla Minecraft will use at least 4 bits per block
if (bitsPerBlock < 4)
{
bitsPerBlock = 4;
}
// MC 1.9 to 1.12 will set palette length field to 0 when palette
// is not used, MC 1.13+ does not send the field at all in this case
int paletteLength = 0; // Assume zero when length is absent
if (usePalette || protocolversion < Protocol18Handler.MC113Version)
{
paletteLength = dataTypes.ReadNextVarInt(cache);
}
int[] palette = new int[paletteLength];
for (int i = 0; i < paletteLength; i++)
{
palette[i] = dataTypes.ReadNextVarInt(cache);
}
// Bit mask covering bitsPerBlock bits
// EG, if bitsPerBlock = 5, valueMask = 00011111 in binary
uint valueMask = (uint)((1 << bitsPerBlock) - 1);
// Block IDs are packed in the array of 64-bits integers
ulong[] dataArray = dataTypes.ReadNextULongArray(cache);
Chunk chunk = new Chunk();
if (dataArray.Length > 0)
{
int longIndex = 0;
int startOffset = 0 - bitsPerBlock;
for (int blockY = 0; blockY < Chunk.SizeY; blockY++)
{
for (int blockZ = 0; blockZ < Chunk.SizeZ; blockZ++)
{
for (int blockX = 0; blockX < Chunk.SizeX; blockX++)
{
// NOTICE: In the future a single ushort may not store the entire block id;
// the Block class may need to change if block state IDs go beyond 65535
ushort blockId;
// Calculate location of next block ID inside the array of Longs
startOffset += bitsPerBlock;
bool overlap = false;
if ((startOffset + bitsPerBlock) > 64)
{
if (protocolversion >= Protocol18Handler.MC116Version)
{
// In MC 1.16+, padding is applied to prevent overlapping between Longs:
// [ LONG INTEGER ][ LONG INTEGER ]
// [Block][Block][Block]XXXXX[Block][Block][Block]XXXXX
// When overlapping, move forward to the beginning of the next Long
startOffset = 0;
longIndex++;
}
else
{
// In MC 1.15 and lower, block IDs can overlap between Longs:
// [ LONG INTEGER ][ LONG INTEGER ]
// [Block][Block][Block][Blo ck][Block][Block][Block][
// Detect when we reached the next Long or switch to overlap mode
if (startOffset >= 64)
{
startOffset -= 64;
longIndex++;
}
else
{
overlap = true;
}
}
}
// Extract Block ID
if (overlap)
{
int endOffset = 64 - startOffset;
blockId = (ushort)((dataArray[longIndex] >> startOffset | dataArray[longIndex + 1] << endOffset) & valueMask);
}
else
{
blockId = (ushort)((dataArray[longIndex] >> startOffset) & valueMask);
}
// Map small IDs to actual larger block IDs
if (usePalette)
{
if (paletteLength <= blockId)
{
int blockNumber = (blockY * Chunk.SizeZ + blockZ) * Chunk.SizeX + blockX;
throw new IndexOutOfRangeException(String.Format("Block ID {0} is outside Palette range 0-{1}! (bitsPerBlock: {2}, blockNumber: {3})",
blockId,
paletteLength - 1,
bitsPerBlock,
blockNumber));
}
blockId = (ushort)palette[blockId];
}
// We have our block, save the block into the chunk
chunk[blockX, blockY, blockZ] = new Block(blockId);
}
}
}
}
//We have our chunk, save the chunk into the world
if (handler.GetWorld()[chunkX, chunkZ] == null)
{
handler.GetWorld()[chunkX, chunkZ] = new ChunkColumn();
}
handler.GetWorld()[chunkX, chunkZ][chunkY] = chunk;
//Pre-1.14 Lighting data
if (protocolversion < Protocol18Handler.MC114Version)
{
//Skip block light
dataTypes.ReadData((Chunk.SizeX * Chunk.SizeY * Chunk.SizeZ) / 2, cache);
//Skip sky light
if (currentDimension == 0)
{
// Sky light is not sent in the nether or the end
dataTypes.ReadData((Chunk.SizeX * Chunk.SizeY * Chunk.SizeZ) / 2, cache);
}
}
}
}
// Don't worry about skipping remaining data since there is no useful data afterwards in 1.9
// (plus, it would require parsing the tile entity lists' NBT)
}
else if (protocolversion >= Protocol18Handler.MC18Version)
{
// 1.8 chunk format
if (chunksContinuous && chunkMask == 0)
{
//Unload the entire chunk column
handler.GetWorld()[chunkX, chunkZ] = null;
}
else
{
//Load chunk data from the server
for (int chunkY = 0; chunkY < ChunkColumn.ColumnSize; chunkY++)
{
if ((chunkMask & (1 << chunkY)) != 0)
{
Chunk chunk = new Chunk();
//Read chunk data, all at once for performance reasons, and build the chunk object
Queue <ushort> queue = new Queue <ushort>(dataTypes.ReadNextUShortsLittleEndian(Chunk.SizeX * Chunk.SizeY * Chunk.SizeZ, cache));
for (int blockY = 0; blockY < Chunk.SizeY; blockY++)
{
for (int blockZ = 0; blockZ < Chunk.SizeZ; blockZ++)
{
for (int blockX = 0; blockX < Chunk.SizeX; blockX++)
{
chunk[blockX, blockY, blockZ] = new Block(queue.Dequeue());
}
}
}
//We have our chunk, save the chunk into the world
if (handler.GetWorld()[chunkX, chunkZ] == null)
{
handler.GetWorld()[chunkX, chunkZ] = new ChunkColumn();
}
handler.GetWorld()[chunkX, chunkZ][chunkY] = chunk;
}
}
//Skip light information
for (int chunkY = 0; chunkY < ChunkColumn.ColumnSize; chunkY++)
{
if ((chunkMask & (1 << chunkY)) != 0)
{
//Skip block light
dataTypes.ReadData((Chunk.SizeX * Chunk.SizeY * Chunk.SizeZ) / 2, cache);
//Skip sky light
if (hasSkyLight)
{
dataTypes.ReadData((Chunk.SizeX * Chunk.SizeY * Chunk.SizeZ) / 2, cache);
}
}
}
//Skip biome metadata
if (chunksContinuous)
{
dataTypes.ReadData(Chunk.SizeX * Chunk.SizeZ, cache);
}
}
}
else
{
// 1.7 chunk format
if (chunksContinuous && chunkMask == 0)
{
//Unload the entire chunk column
handler.GetWorld()[chunkX, chunkZ] = null;
}
else
{
//Count chunk sections
int sectionCount = 0;
int addDataSectionCount = 0;
for (int chunkY = 0; chunkY < ChunkColumn.ColumnSize; chunkY++)
{
if ((chunkMask & (1 << chunkY)) != 0)
{
sectionCount++;
}
if ((chunkMask2 & (1 << chunkY)) != 0)
{
addDataSectionCount++;
}
}
//Read chunk data, unpacking 4-bit values into 8-bit values for block metadata
Queue <byte> blockTypes = new Queue <byte>(dataTypes.ReadData(Chunk.SizeX * Chunk.SizeY * Chunk.SizeZ * sectionCount, cache));
Queue <byte> blockMeta = new Queue <byte>();
foreach (byte packed in dataTypes.ReadData((Chunk.SizeX * Chunk.SizeY * Chunk.SizeZ * sectionCount) / 2, cache))
{
byte hig = (byte)(packed >> 4);
byte low = (byte)(packed & (byte)0x0F);
blockMeta.Enqueue(hig);
blockMeta.Enqueue(low);
}
//Skip data we don't need
dataTypes.ReadData((Chunk.SizeX * Chunk.SizeY * Chunk.SizeZ * sectionCount) / 2, cache); //Block light
if (hasSkyLight)
{
dataTypes.ReadData((Chunk.SizeX * Chunk.SizeY * Chunk.SizeZ * sectionCount) / 2, cache); //Sky light
}
dataTypes.ReadData((Chunk.SizeX * Chunk.SizeY * Chunk.SizeZ * addDataSectionCount) / 2, cache); //BlockAdd
if (chunksContinuous)
{
dataTypes.ReadData(Chunk.SizeX * Chunk.SizeZ, cache); //Biomes
}
//Load chunk data
for (int chunkY = 0; chunkY < ChunkColumn.ColumnSize; chunkY++)
{
if ((chunkMask & (1 << chunkY)) != 0)
{
Chunk chunk = new Chunk();
for (int blockY = 0; blockY < Chunk.SizeY; blockY++)
{
for (int blockZ = 0; blockZ < Chunk.SizeZ; blockZ++)
{
for (int blockX = 0; blockX < Chunk.SizeX; blockX++)
{
chunk[blockX, blockY, blockZ] = new Block(blockTypes.Dequeue(), blockMeta.Dequeue());
}
}
}
if (handler.GetWorld()[chunkX, chunkZ] == null)
{
handler.GetWorld()[chunkX, chunkZ] = new ChunkColumn();
}
handler.GetWorld()[chunkX, chunkZ][chunkY] = chunk;
}
}
}
}
}