private IEnumerable <IChunkColumn> GenerateChunks(ChunkCoordinates center, int renderDistance)
{
var oldChunks = _loadedChunks.ToArray();
double radiusSquared = Math.Pow(renderDistance, 2);
List <ChunkCoordinates> newChunkCoordinates = new List <ChunkCoordinates>();
List <ChunkCoordinates> results = new List <ChunkCoordinates>((renderDistance * 2) * (renderDistance * 2));
for (int y = -renderDistance; y <= renderDistance; y++)
{
for (int x = -renderDistance; x <= renderDistance; x++)
{
results.Add(new ChunkCoordinates(x, y));
}
}
foreach (var cc in results.OrderBy(p =>
{
int dx = p.X;
int dy = p.Z;
return(dx * dx + dy * dy);
})
.TakeWhile(p =>
{
int dx = p.X;
int dy = p.Z;
var r = dx * dx + dy * dy;
return(r < radiusSquared);
}))
{
var acc = center + cc;
newChunkCoordinates.Add(acc);
if (!_loadedChunks.Contains(acc))
{
IChunkColumn chunk =
_generator.GenerateChunkColumn(acc);
if (chunk == null)
{
continue;
}
_loadedChunks.Add(acc);
yield return(chunk);
}
}
foreach (var chunk in oldChunks)
{
if (!newChunkCoordinates.Contains((ChunkCoordinates)chunk))
{
UnloadChunk(chunk.X, chunk.Z);
_loadedChunks.Remove(chunk);
}
}
}
private IEnumerable <ChunkColumn> GenerateChunks(ChunkCoordinates center, int renderDistance)
{
var oldChunks = _loadedChunks.ToArray();
double radiusSquared = Math.Pow(renderDistance, 2);
List <ChunkCoordinates> newChunkCoordinates = new List <ChunkCoordinates>();
List <ChunkCoordinates> results = new List <ChunkCoordinates>();
for (int y = center.Z - renderDistance; y <= center.Z + renderDistance; y++)
{
for (int x = center.X - renderDistance; x <= center.X + renderDistance; x++)
{
var cc = new ChunkCoordinates(x, y);
newChunkCoordinates.Add(cc);
if (!_loadedChunks.Contains(cc))
{
ChunkColumn chunk =
_generator.GenerateChunkColumn(cc);
if (chunk == null)
{
continue;
}
_loadedChunks.Add(cc);
yield return(chunk);
}
}
}
foreach (var chunk in oldChunks)
{
if (!newChunkCoordinates.Contains(chunk) && chunk != center)
{
//UnloadChunk(chunk.X, chunk.Z);
ChunkUnloadEvent unloadEvent = new ChunkUnloadEvent(chunk);
EventDispatcher.DispatchEvent(unloadEvent);
if (!unloadEvent.IsCancelled)
{
_loadedChunks.Remove(chunk);
}
}
}
}
private IEnumerable <ChunkColumn> GenerateChunks(ChunkCoordinates center, int renderDistance)
{
var oldChunks = _loadedChunks.ToArray();
List <ChunkCoordinates> newChunkCoordinates = new List <ChunkCoordinates>();
int minZ = Math.Min(center.Z - renderDistance, center.Z + renderDistance);
int maxZ = Math.Max(center.Z - renderDistance, center.Z + renderDistance);
int minX = Math.Min(center.X - renderDistance, center.X + renderDistance);
int maxX = Math.Max(center.X - renderDistance, center.X + renderDistance);
for (int x = minX; x <= maxX; x++)
{
for (int z = minZ; z <= maxZ; z++)
{
var cc = new ChunkCoordinates(x, z);
newChunkCoordinates.Add(cc);
if (!_loadedChunks.Contains(cc))
{
_loadedChunks.Add(cc);
ChunkColumn chunk =
_generator.GenerateChunkColumn(cc);
if (chunk == null)
{
continue;
}
base.World.ChunkManager.AddChunk(chunk, cc, false);
LoadEntities(chunk);
yield return(chunk);
}
}
}
foreach (var chunk in oldChunks)
{
if (!newChunkCoordinates.Contains(chunk) && chunk != center)
{
//World.UnloadChunk(chunk);
World.ChunkManager.RemoveChunk(chunk, false);
_loadedChunks.Remove(chunk);
}
}
}
public ChunkColumn GetChunk(ChunkCoordinates coordinates, string basePath, IWorldGenerator generator)
{
try
{
const int width = 32;
const int depth = 32;
int rx = coordinates.X >> 5;
int rz = coordinates.Z >> 5;
string filePath = Path.Combine(basePath, string.Format(@"region{2}r.{0}.{1}.mca", rx, rz, Path.DirectorySeparatorChar));
if (!File.Exists(filePath))
{
var chunkColumn = generator?.GenerateChunkColumn(coordinates);
if (chunkColumn != null)
{
//SkyLightBlockAccess blockAccess = new SkyLightBlockAccess(this, chunkColumn);
//new SkyLightCalculations().RecalcSkyLight(chunkColumn, blockAccess);
}
return(chunkColumn);
}
using (var regionFile = File.OpenRead(filePath))
{
int locationIndex = ((coordinates.X & (width - 1)) + (coordinates.Z & (depth - 1)) * width) << 2;
regionFile.Seek(locationIndex, SeekOrigin.Begin);
byte[] offsetBuffer = new byte[4];
regionFile.Read(offsetBuffer, 0, 3);
Array.Reverse(offsetBuffer);
int offset = BitConverter.ToInt32(offsetBuffer, 0) << 4;
int sectorCount = regionFile.ReadByte();
if (offset == 0 || sectorCount == 0)
{
var chunkColumn = generator?.GenerateChunkColumn(coordinates);
if (chunkColumn != null)
{
chunkColumn.NeedSave = true;
}
return(chunkColumn);
}
/*regionFile.Seek(4096 + locationIndex, SeekOrigin.Begin);
* regionFile.Read(offsetBuffer, 0, 4);
* Array.Reverse(offsetBuffer);
* int lastModified = BitConverter.ToInt32(offsetBuffer, 0);
* Log.Warn("Last modified: " + lastModified);*/
regionFile.Seek(offset + 4, SeekOrigin.Begin); //Offset + the length header
int compressionMode = regionFile.ReadByte();
if (compressionMode != 0x02)
{
throw new Exception($"CX={coordinates.X}, CZ={coordinates.Z}, NBT wrong compression. Expected 0x02, got 0x{compressionMode:X2}. " +
$"Offset={offset}, Sectors={sectorCount}");
}
var nbt = new NbtFile();
nbt.LoadFromStream(regionFile, NbtCompression.ZLib);
NbtCompound dataTag = (NbtCompound)nbt.RootTag["Level"];
bool isPocketEdition = false;
if (dataTag.Contains("MCPE BID"))
{
isPocketEdition = dataTag["MCPE BID"].ByteValue == 1;
}
NbtList sections = dataTag["Sections"] as NbtList;
ChunkColumn chunk = new ChunkColumn
{
x = coordinates.X,
z = coordinates.Z,
biomeId = dataTag["Biomes"].ByteArrayValue,
isAllAir = true
};
if (chunk.biomeId.Length > 256)
{
throw new Exception();
}
NbtTag heights = dataTag["HeightMap"] as NbtIntArray;
if (heights != null)
{
int[] intHeights = heights.IntArrayValue;
for (int i = 0; i < 256; i++)
{
chunk.height[i] = (short)intHeights[i];
}
}
// This will turn into a full chunk column
foreach (NbtTag sectionTag in sections)
{
ReadSection(sectionTag, chunk, !isPocketEdition);
}
NbtList entities = dataTag["Entities"] as NbtList;
if (entities != null)
{
chunk.Entities = entities.ToArray <NbtCompound>();
}
NbtList blockEntities = dataTag["TileEntities"] as NbtList;
if (blockEntities != null)
{
foreach (var nbtTag in blockEntities)
{
var blockEntityTag = (NbtCompound)nbtTag.Clone();
string entityId = blockEntityTag["id"].StringValue;
int x = blockEntityTag["x"].IntValue;
int y = blockEntityTag["y"].IntValue;
int z = blockEntityTag["z"].IntValue;
if (entityId.StartsWith("minecraft:"))
{
var id = entityId.Split(':')[1];
entityId = id.First().ToString().ToUpper() + id.Substring(1);
blockEntityTag["id"] = new NbtString("id", entityId);
}
BlockEntity blockEntity = BlockEntityFactory.GetBlockEntityById(entityId);
if (blockEntity != null)
{
blockEntityTag.Name = string.Empty;
if (blockEntity is Sign)
{
// Remove the JSON stuff and get the text out of extra data.
// TAG_String("Text2"): "{"extra":["10c a loaf!"],"text":""}"
CleanSignText(blockEntityTag, "Text1");
CleanSignText(blockEntityTag, "Text2");
CleanSignText(blockEntityTag, "Text3");
CleanSignText(blockEntityTag, "Text4");
}
else if (blockEntity is ChestBlockEntity)
{
NbtList items = (NbtList)blockEntityTag["Items"];
if (items != null)
{
//for (byte i = 0; i < items.Count; i++)
//{
// NbtCompound item = (NbtCompound) items[i];
// item.Add(new NbtShort("OriginalDamage", item["Damage"].ShortValue));
// byte metadata = (byte) (item["Damage"].ShortValue & 0xff);
// item.Remove("Damage");
// item.Add(new NbtByte("Damage", metadata));
//}
}
}
chunk.SetBlockEntity(new BlockCoordinates(x, y, z), blockEntityTag);
}
else
{
if (Log.IsDebugEnabled)
{
Log.Debug($"Loaded unknown block entity: {blockEntityTag}");
}
}
}
}
//NbtList tileTicks = dataTag["TileTicks"] as NbtList;
chunk.RecalcHeight();
chunk.isDirty = false;
chunk.NeedSave = false;
if (Config.GetProperty("CalculateLights", false))
{
SkyLightBlockAccess blockAccess = new SkyLightBlockAccess(this, chunk);
new SkyLightCalculations().RecalcSkyLight(chunk, blockAccess);
//TODO: Block lights.
}
return(chunk);
}
}
catch (Exception e)
{
Log.Error($"Loading chunk {coordinates}", e);
var chunkColumn = generator?.GenerateChunkColumn(coordinates);
if (chunkColumn != null)
{
//chunkColumn.NeedSave = true;
}
return(chunkColumn);
}
}
public ChunkColumn GetChunk(ChunkCoordinates coordinates, string basePath, IWorldGenerator generator)
{
try
{
int width = 32;
int depth = 32;
int rx = coordinates.X >> 5;
int rz = coordinates.Z >> 5;
string filePath = Path.Combine(basePath, string.Format(@"region{2}r.{0}.{1}.mca", rx, rz, Path.DirectorySeparatorChar));
if (!File.Exists(filePath))
{
var chunkColumn = generator?.GenerateChunkColumn(coordinates);
if (chunkColumn != null)
{
//chunkColumn.NeedSave = true;
}
return(chunkColumn);
}
using (var regionFile = File.OpenRead(filePath))
{
byte[] buffer = new byte[8192];
regionFile.Read(buffer, 0, 8192);
int xi = (coordinates.X % width);
if (xi < 0)
{
xi += 32;
}
int zi = (coordinates.Z % depth);
if (zi < 0)
{
zi += 32;
}
int tableOffset = (xi + zi * width) * 4;
regionFile.Seek(tableOffset, SeekOrigin.Begin);
byte[] offsetBuffer = new byte[4];
regionFile.Read(offsetBuffer, 0, 3);
Array.Reverse(offsetBuffer);
int offset = BitConverter.ToInt32(offsetBuffer, 0) << 4;
byte[] bytes = BitConverter.GetBytes(offset >> 4);
Array.Reverse(bytes);
if (offset != 0 && offsetBuffer[0] != bytes[0] && offsetBuffer[1] != bytes[1] && offsetBuffer[2] != bytes[2])
{
throw new Exception($"Not the same buffer\n{Package.HexDump(offsetBuffer)}\n{Package.HexDump(bytes)}");
}
int length = regionFile.ReadByte();
if (offset == 0 || length == 0)
{
var chunkColumn = generator?.GenerateChunkColumn(coordinates);
if (chunkColumn != null)
{
//chunkColumn.NeedSave = true;
}
return(chunkColumn);
}
regionFile.Seek(offset, SeekOrigin.Begin);
byte[] waste = new byte[4];
regionFile.Read(waste, 0, 4);
int compressionMode = regionFile.ReadByte();
if (compressionMode != 0x02)
{
throw new Exception($"CX={coordinates.X}, CZ={coordinates.Z}, NBT wrong compression. Expected 0x02, got 0x{compressionMode:X2}. " +
$"Offset={offset}, length={length}\n{Package.HexDump(waste)}");
}
var nbt = new NbtFile();
nbt.LoadFromStream(regionFile, NbtCompression.ZLib);
NbtCompound dataTag = (NbtCompound)nbt.RootTag["Level"];
bool isPocketEdition = false;
if (dataTag.Contains("MCPE BID"))
{
isPocketEdition = dataTag["MCPE BID"].ByteValue == 1;
}
NbtList sections = dataTag["Sections"] as NbtList;
ChunkColumn chunk = new ChunkColumn
{
x = coordinates.X,
z = coordinates.Z,
biomeId = dataTag["Biomes"].ByteArrayValue,
isAllAir = true
};
if (chunk.biomeId.Length > 256)
{
throw new Exception();
}
NbtTag heights = dataTag["HeightMap"] as NbtIntArray;
if (heights != null)
{
int[] intHeights = heights.IntArrayValue;
for (int i = 0; i < 256; i++)
{
chunk.height[i] = (short)intHeights[i];
}
}
// This will turn into a full chunk column
foreach (NbtTag sectionTag in sections)
{
ReadSection(sectionTag, chunk, !isPocketEdition);
}
NbtList entities = dataTag["Entities"] as NbtList;
NbtList blockEntities = dataTag["TileEntities"] as NbtList;
if (blockEntities != null)
{
foreach (var nbtTag in blockEntities)
{
var blockEntityTag = (NbtCompound)nbtTag.Clone();
string entityId = blockEntityTag["id"].StringValue;
int x = blockEntityTag["x"].IntValue;
int y = blockEntityTag["y"].IntValue;
int z = blockEntityTag["z"].IntValue;
if (entityId.StartsWith("minecraft:"))
{
var id = entityId.Split(':')[1];
entityId = id.First().ToString().ToUpper() + id.Substring(1);
blockEntityTag["id"] = new NbtString("id", entityId);
}
BlockEntity blockEntity = BlockEntityFactory.GetBlockEntityById(entityId);
if (blockEntity != null)
{
blockEntityTag.Name = string.Empty;
if (blockEntity is Sign)
{
// Remove the JSON stuff and get the text out of extra data.
// TAG_String("Text2"): "{"extra":["10c a loaf!"],"text":""}"
CleanSignText(blockEntityTag, "Text1");
CleanSignText(blockEntityTag, "Text2");
CleanSignText(blockEntityTag, "Text3");
CleanSignText(blockEntityTag, "Text4");
}
else if (blockEntity is ChestBlockEntity)
{
NbtList items = (NbtList)blockEntityTag["Items"];
if (items != null)
{
//for (byte i = 0; i < items.Count; i++)
//{
// NbtCompound item = (NbtCompound) items[i];
// item.Add(new NbtShort("OriginalDamage", item["Damage"].ShortValue));
// byte metadata = (byte) (item["Damage"].ShortValue & 0xff);
// item.Remove("Damage");
// item.Add(new NbtByte("Damage", metadata));
//}
}
}
chunk.SetBlockEntity(new BlockCoordinates(x, y, z), blockEntityTag);
}
else
{
if (Log.IsDebugEnabled)
{
Log.Debug($"Loaded unknown block entity: {blockEntityTag}");
}
}
}
}
//NbtList tileTicks = dataTag["TileTicks"] as NbtList;
chunk.isDirty = false;
chunk.NeedSave = false;
return(chunk);
}
}
catch (Exception e)
{
Log.Error($"Loading chunk {coordinates}", e);
var chunkColumn = generator?.GenerateChunkColumn(coordinates);
if (chunkColumn != null)
{
//chunkColumn.NeedSave = true;
}
return(chunkColumn);
}
}
public ChunkColumn GetChunk(ChunkCoordinates coordinates, IWorldGenerator generator)
{
var index = BitConverter.GetBytes(coordinates.X).Concat(BitConverter.GetBytes(coordinates.Z)).ToArray();
var versionKey = index.Concat(new byte[] { 0x76 }).ToArray();
var version = _db.Get(versionKey);
ChunkColumn chunkColumn = null;
if (version != null && version.First() == 10)
{
chunkColumn = new ChunkColumn();
chunkColumn.X = coordinates.X;
chunkColumn.Z = coordinates.Z;
for (byte y = 0; y < 16; y++)
{
var chunkDataKey = index.Concat(new byte[] { 0x2f, y }).ToArray();
var sectionBytes = _db.Get(chunkDataKey);
if (sectionBytes == null)
{
for (; y < 16; y++)
{
chunkColumn[y]?.PutPool();
chunkColumn[y] = null;
}
break;
}
ParseSection((SubChunk)chunkColumn[y], sectionBytes);
}
// Biomes
var flatDataBytes = _db.Get(index.Concat(new byte[] { 0x2D }).ToArray());
if (flatDataBytes != null)
{
chunkColumn.biomeId = flatDataBytes.AsSpan().Slice(512, 256).ToArray();
}
// Block entities
var blockEntityBytes = _db.Get(index.Concat(new byte[] { 0x31 }).ToArray());
if (blockEntityBytes != null)
{
var data = blockEntityBytes.AsSpan();
var file = new NbtFile {
BigEndian = false, UseVarInt = false
};
int position = 0;
do
{
position += (int)file.LoadFromStream(new MemoryStream(data.Slice(position).ToArray()), NbtCompression.None);
var blockEntityTag = file.RootTag;
int x = blockEntityTag["x"].IntValue;
int y = blockEntityTag["y"].IntValue;
int z = blockEntityTag["z"].IntValue;
chunkColumn.SetBlockEntity(new BlockCoordinates(x, y, z), (NbtCompound)file.RootTag);
} while (position < data.Length);
}
}
if (chunkColumn == null)
{
if (version != null)
{
Log.Error($"Expected other version, but got version={version.First()}");
}
chunkColumn = generator?.GenerateChunkColumn(coordinates);
if (chunkColumn != null)
{
if (Dimension == Dimension.Overworld && Config.GetProperty("CalculateLights", false))
{
var blockAccess = new SkyLightBlockAccess(this, chunkColumn);
new SkyLightCalculations().RecalcSkyLight(chunkColumn, blockAccess);
}
chunkColumn.IsDirty = false;
chunkColumn.NeedSave = false;
}
}
chunkColumn?.RecalcHeight();
if (Dimension == Dimension.Overworld && Config.GetProperty("CalculateLights", false))
{
SkyLightBlockAccess blockAccess = new SkyLightBlockAccess(this, chunkColumn);
new SkyLightCalculations().RecalcSkyLight(chunkColumn, blockAccess);
//TODO: Block lights.
}
return(chunkColumn);
}
public ChunkColumn GetChunk(ChunkCoordinates coordinates, IWorldGenerator generator)
{
var sw = Stopwatch.StartNew();
byte[] index = Combine(BitConverter.GetBytes(coordinates.X), BitConverter.GetBytes(coordinates.Z));
byte[] versionKey = Combine(index, 0x76);
byte[] version = _db.Get(versionKey);
ChunkColumn chunkColumn = null;
if (version != null && version.First() >= 10)
{
chunkColumn = new ChunkColumn
{
X = coordinates.X,
Z = coordinates.Z
};
var chunkDataKey = Combine(index, new byte[] { 0x2f, 0 });
for (byte y = 0; y < 16; y++)
{
chunkDataKey[9] = y;
byte[] sectionBytes = _db.Get(chunkDataKey);
if (sectionBytes == null)
{
chunkColumn[y]?.PutPool();
chunkColumn[y] = null;
continue;
}
ParseSection(chunkColumn[y], sectionBytes);
}
// Biomes
var flatDataBytes = _db.Get(Combine(index, 0x2D));
if (flatDataBytes != null)
{
chunkColumn.biomeId = flatDataBytes.AsSpan().Slice(512, 256).ToArray();
}
// Block entities
byte[] blockEntityBytes = _db.Get(Combine(index, 0x31));
if (blockEntityBytes != null)
{
var data = blockEntityBytes.AsMemory();
var file = new NbtFile
{
BigEndian = false,
UseVarInt = false
};
int position = 0;
do
{
position += (int)file.LoadFromStream(new MemoryStreamReader(data.Slice(position)), NbtCompression.None);
NbtTag blockEntityTag = file.RootTag;
int x = blockEntityTag["x"].IntValue;
int y = blockEntityTag["y"].IntValue;
int z = blockEntityTag["z"].IntValue;
chunkColumn.SetBlockEntity(new BlockCoordinates(x, y, z), (NbtCompound)blockEntityTag);
} while (position < data.Length);
}
}
if (chunkColumn == null)
{
if (version != null)
{
Log.Error($"Expected other version, but got version={version.First()}");
}
chunkColumn = generator?.GenerateChunkColumn(coordinates);
}
if (chunkColumn != null)
{
if (Dimension == Dimension.Overworld && Config.GetProperty("CalculateLights", false))
{
chunkColumn.RecalcHeight();
var blockAccess = new SkyLightBlockAccess(this, chunkColumn);
new SkyLightCalculations().RecalcSkyLight(chunkColumn, blockAccess);
//TODO: Block lights.
}
chunkColumn.IsDirty = false;
chunkColumn.NeedSave = false;
}
//Log.Debug($"Read chunk {coordinates.X}, {coordinates.Z} in {sw.ElapsedMilliseconds}ms");
return(chunkColumn);
}