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Improve ReadBlockStatesField

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This commit is contained in:
BruceChen 2022-08-25 10:40:55 +08:00
parent 64915c87cf
commit 5f520e2cf4
3 changed files with 20 additions and 22 deletions
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6
MinecraftClient/Mapping/ChunkColumn.cs
View file

@ -18,7 +18,7 @@ namespace MinecraftClient.Mapping
/// <summary>
/// Blocks contained into the chunk
/// </summary>
private readonly Chunk[] chunks;
private readonly Chunk?[] chunks;
/// <summary>
/// Create a new ChunkColumn
@ -26,7 +26,7 @@ namespace MinecraftClient.Mapping
public ChunkColumn(int size = 16)
{
ColumnSize = size;
chunks = new Chunk[size];
chunks = new Chunk?[size];
}
/// <summary>
@ -35,7 +35,7 @@ namespace MinecraftClient.Mapping
/// <param name="chunkX">ChunkColumn X</param>
/// <param name="chunkY">ChunkColumn Y</param>
/// <returns>chunk at the given location</returns>
public Chunk this[int chunkY]
public Chunk? this[int chunkY]
{
get
{

4
MinecraftClient/Mapping/World.cs
View file

@ -118,10 +118,9 @@ namespace MinecraftClient.Mapping
/// <param name="chunkColumnSize">ChunkColumn size</param>
/// <param name="chunk">Chunk data</param>
/// <param name="loadCompleted">Whether the ChunkColumn has been fully loaded</param>
public void StoreChunk(int chunkX, int chunkY, int chunkZ, int chunkColumnSize, Chunk chunk, bool loadCompleted)
public void StoreChunk(int chunkX, int chunkY, int chunkZ, int chunkColumnSize, Chunk? chunk, bool loadCompleted)
{
ChunkColumn? chunkColumn = null;
chunksLock.EnterUpgradeableReadLock();
try
{
@ -151,7 +150,6 @@ namespace MinecraftClient.Mapping
{
chunksLock.ExitUpgradeableReadLock();
}
chunkColumn[chunkY] = chunk;
if (loadCompleted)
chunkColumn.FullyLoaded = true;

32
MinecraftClient/Protocol/Handlers/Protocol18Terrain.cs
View file

@ -2,6 +2,7 @@
using System.Collections.Generic;
using System.Numerics;
using System.Threading;
using System.Threading.Tasks;
//using System.Linq;
//using System.Text;
using MinecraftClient.Mapping;
@ -32,9 +33,8 @@ namespace MinecraftClient.Protocol.Handlers
/// <summary>
/// Reading the "Block states" field: consists of 4096 entries, representing all the blocks in the chunk section.
/// </summary>
/// <param name="chunk">Blocks will store in this chunk</param>
/// <param name="cache">Cache for reading data</param>
private Chunk? ReadBlockStatesField(ref Chunk chunk, Queue<byte> cache)
private Chunk? ReadBlockStatesField(Queue<byte> cache)
{
// read Block states (Type: Paletted Container)
byte bitsPerEntry = dataTypes.ReadNextByte(cache);
@ -44,18 +44,20 @@ namespace MinecraftClient.Protocol.Handlers
{
// Palettes: Single valued - 1.18(1.18.1) and above
ushort blockId = (ushort)dataTypes.ReadNextVarInt(cache);
Block block = new(blockId);
dataTypes.SkipNextVarInt(cache); // Data Array Length will be zero
// Empty chunks will not be stored
if (new Block(blockId).Type == Material.Air)
if (block.Type == Material.Air)
return null;
Chunk chunk = new();
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.SetWithoutCheck(blockX, blockY, blockZ, new Block(blockId));
chunk.SetWithoutCheck(blockX, blockY, blockZ, block);
return chunk;
}
else
{
@ -79,6 +81,7 @@ namespace MinecraftClient.Protocol.Handlers
// Block IDs are packed in the array of 64-bits integers
ulong[] dataArray = dataTypes.ReadNextULongArray(cache);
Chunk chunk = new();
int longIndex = 0;
int startOffset = 0 - bitsPerEntry;
for (int blockY = 0; blockY < Chunk.SizeY; blockY++)
@ -87,10 +90,6 @@ namespace MinecraftClient.Protocol.Handlers
{
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 += bitsPerEntry;
@ -105,8 +104,9 @@ namespace MinecraftClient.Protocol.Handlers
longIndex++;
}
// Extract Block ID
blockId = (ushort)((dataArray[longIndex] >> startOffset) & valueMask);
// 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 = (ushort)((dataArray[longIndex] >> startOffset) & valueMask);
// Map small IDs to actual larger block IDs
if (usePalette)
@ -129,9 +129,8 @@ namespace MinecraftClient.Protocol.Handlers
}
}
}
return chunk;
}
return chunk;
}
/// <summary>
@ -156,11 +155,13 @@ namespace MinecraftClient.Protocol.Handlers
{
// 1.17 and above chunk format
// Unloading chunks is handled by a separate packet
for (int chunkY = 0; chunkY < chunkColumnSize; chunkY++)
{
int lastChunkY = 0;
int lastChunkY;
if (protocolversion == Protocol18Handler.MC_1_17_Version || protocolversion == Protocol18Handler.MC_1_17_1_Version)
{
lastChunkY = 0;
for (int i = verticalStripBitmask!.Length - 1; i >= 0; --i)
{
if (verticalStripBitmask![i] != 0)
@ -187,8 +188,7 @@ namespace MinecraftClient.Protocol.Handlers
int blockCnt = dataTypes.ReadNextShort(cache);
// Read Block states (Type: Paletted Container)
Chunk chunk = new Chunk();
ReadBlockStatesField(ref chunk, cache);
Chunk? chunk = ReadBlockStatesField(cache);
// check before store chunk
if (cancellationToken.IsCancellationRequested)