public ChunkColumn GetChunk(int X, int Z)
{
var width = 32;
var depth = 32;
var rx = X >> 5;
var rz = Z >> 5;
var filePath = Path.Combine(_basePath, string.Format(@"region\r.{0}.{1}.mca", rx, rz));
if (!File.Exists(filePath))
{
return(_backEndGenerator.GenerateChunkColumn(new Vector2(X, Z)));
}
using (var regionFile = File.OpenRead(filePath))
{
var buffer = new byte[8192];
regionFile.Read(buffer, 0, 8192);
var xi = (X % width);
if (xi < 0)
{
xi += 32;
}
var zi = (Z % depth);
if (zi < 0)
{
zi += 32;
}
var tableOffset = (xi + zi * width) * 4;
regionFile.Seek(tableOffset, SeekOrigin.Begin);
var offsetBuffer = new byte[4];
regionFile.Read(offsetBuffer, 0, 3);
Array.Reverse(offsetBuffer);
var offset = BitConverter.ToInt32(offsetBuffer, 0) << 4;
var length = regionFile.ReadByte();
//if (offset == 0 || length == 0) return _backEndGenerator.GenerateChunkColumn(new Vector2(X, Z));
if (offset == 0 || length == 0)
{
return(_backEndGenerator.GenerateChunkColumn(new Vector2(X, Z)));
}
regionFile.Seek(offset, SeekOrigin.Begin);
var waste = new byte[4];
regionFile.Read(waste, 0, 4);
var compressionMode = regionFile.ReadByte();
var nbt = new NbtFile();
nbt.LoadFromStream(regionFile, NbtCompression.ZLib);
var dataTag = nbt.RootTag["Level"];
var sections = dataTag["Sections"] as NbtList;
var chunk = new ChunkColumn
{
X = X,
Z = Z,
BiomeId = dataTag["Biomes"].ByteArrayValue
};
for (var i = 0; i < chunk.BiomeId.Length; i++)
{
if (chunk.BiomeId[i] > 22)
{
chunk.BiomeId[i] = 0;
}
}
if (chunk.BiomeId.Length > 256)
{
throw new Exception();
}
// This will turn into a full chunk column
foreach (var sectionTag in sections)
{
var sy = sectionTag["Y"].ByteValue * 16;
var blocks = sectionTag["Blocks"].ByteArrayValue;
var data = sectionTag["Data"].ByteArrayValue;
var addTag = sectionTag["Add"];
var adddata = new byte[2048];
if (addTag != null)
{
adddata = addTag.ByteArrayValue;
}
var blockLight = sectionTag["BlockLight"].ByteArrayValue;
var skyLight = sectionTag["SkyLight"].ByteArrayValue;
for (var x = 0; x < 16; x++)
{
for (var z = 0; z < 16; z++)
{
for (var y = 0; y < 16; y++)
{
var yi = sy + y - _waterOffsetY;
if (yi < 0 || yi >= 256)
{
continue;
}
var anvilIndex = y * 16 * 16 + z * 16 + x;
var blockId = blocks[anvilIndex] + (Nibble4(adddata, anvilIndex) << 8);
var b = BlockFactory.GetBlockById((ushort)blockId);
b.Metadata = Nibble4(data, anvilIndex);
chunk.SetBlock(x, yi, z, b);
chunk.SetBlocklight(x, yi, z, Nibble4(blockLight, anvilIndex));
chunk.SetSkylight(x, yi, z, Nibble4(skyLight, anvilIndex));
}
}
}
}
var entities = dataTag["Entities"] as NbtList;
var tileEntities = dataTag["TileEntities"] as NbtList;
if (tileEntities != null)
{
foreach (var nbtTag in tileEntities)
{
var blockEntityTag = (NbtCompound)nbtTag;
string entityId = blockEntityTag["id"].StringValue;
int x = blockEntityTag["x"].IntValue;
int y = blockEntityTag["y"].IntValue - _waterOffsetY;
int z = blockEntityTag["z"].IntValue;
blockEntityTag["y"] = new NbtInt("y", y);
TileEntity blockEntity = TileEntityFactory.GetBlockEntityById(entityId);
if (blockEntity != null)
{
blockEntityTag.Name = string.Empty;
chunk.SetBlockEntity(new Vector3(x, y, z), blockEntityTag);
}
}
}
var tileTicks = dataTag["TileTicks"] as NbtList;
chunk.IsDirty = false;
return(chunk);
}
}
public void GetEntitysInChunk(int chunkX, int chunkZ)
{
foreach (var player in Level.GetOnlinePlayers)
{
if (player == this)
{
continue;
}
var x = (int)player.KnownPosition.X >> 4;
var z = (int)player.KnownPosition.Z >> 4;
if (chunkX == x && chunkZ == z)
{
new SpawnPlayer(Wrapper)
{
Player = player
}.Write();
}
}
foreach (var entity in Level.Entities)
{
var x = (int)entity.KnownPosition.X >> 4;
var z = (int)entity.KnownPosition.Z >> 4;
if (chunkX == x && chunkZ == z)
{
new SpawnObject(Wrapper)
{
X = entity.KnownPosition.X, Y = entity.KnownPosition.Y, Z = entity.KnownPosition.Z, EntityId = entity.EntityId, Type = (ObjectType)entity.EntityTypeId, Yaw = entity.KnownPosition.Yaw, Pitch = entity.KnownPosition.Pitch
}.Write();
}
}
ChunkColumn chunk = Level.Generator.GenerateChunkColumn(new Vector2(chunkX, chunkZ));
foreach (var raw in chunk.TileEntities)
{
var nbt = raw.Value;
if (nbt == null)
{
continue;
}
string id = null;
var idTag = nbt.Get("id");
if (idTag != null)
{
id = idTag.StringValue;
}
if (string.IsNullOrEmpty(id))
{
continue;
}
var tileEntity = TileEntityFactory.GetBlockEntityById(id);
tileEntity.Coordinates = raw.Key;
tileEntity.SetCompound(nbt);
if (tileEntity.Id == "Sign")
{
var sign = (SignTileEntity)tileEntity;
new UpdateSign(Wrapper)
{
SignCoordinates = sign.Coordinates,
Line1 = sign.Line1,
Line2 = sign.Line2,
Line3 = sign.Line3,
Line4 = sign.Line4,
}.Write();
}
}
}