private void RenderChunk(Chunk c, Bitmap b, int offsetX, int offsetY)
{
int[] heightmap = (int[])c.Root["Level"]["HeightMap"];
TAG_Compound[] sections = new TAG_Compound[16];
int highest = -1;
foreach (TAG t in (TAG[])c.Root["Level"]["Sections"])
{
byte index = (byte)t["Y"];
if (index > highest)
highest = index;
sections[index] = (TAG_Compound)t;
}
//chunk exists but all blocks are air
if (highest < 0)
return;
highest = ((highest + 1) * 16) - 1;
if (highest > UpperLimit)
highest = UpperLimit;
if (highest < LowerLimit)
highest = LowerLimit;
TAG biomes = null;
c.Root["Level"].TryGetValue("Biomes", out biomes);
for (int z = 0; z < 16; z++)
{
for (int x = 0; x < 16; x++)
{
int y = GetHeight(sections, x, z, highest, LowerLimit, Only, Exclude);
if (y < LowerLimit)
continue;
byte id, data;
GetBlock(sections, x, y, z, out id, out data);
byte biome = 255;
if(ConsiderBiomes && biomes != null)
biome = ((byte[])biomes)[x + z * 16];
Color color = ColorPalette.Lookup(id, data, biome);
if (Transparency)
{
y--;
while (color.A < 255 && y >= LowerLimit)
{
GetBlock(sections, x, y, z, out id, out data);
if (Only != null && !Only.Contains(id))
id = 0;
if (Exclude != null && Exclude.Contains(id))
id = 0;
Color c2 = ColorPalette.Lookup(id, data, biome);
color = Blend(color, c2);
y--;
}
}
else
color = Color.FromArgb(255, color.R, color.G, color.B);
if (ShowHeight)
{
//brighten/darken by height; arbitrary value, but /seems/ to look okay
color = AddtoColor(color, (int)(y / 1.7 - 42));
}
b.SetPixel(offsetX + x, offsetY + z, color);
}
}
}
private void RenderChunkBiomes(Chunk c, Bitmap b, int offsetX, int offsetY)
{
TAG t = null;
if (c.Root["Level"].TryGetValue("Biomes", out t))
{
byte[] biomes = (byte[])t;
for (int z = 0; z < 16; z++)
{
for (int x = 0; x < 16; x++)
{
byte biome = biomes[x + z * 16];
Color color = ColorPalette.Lookup(biome);
b.SetPixel(offsetX + x, offsetY + z, color);
}
}
}
else
{
Color color = ColorPalette.Lookup(255);
for (int z = 0; z < 16; z++)
{
for (int x = 0; x < 16; x++)
{
b.SetPixel(offsetX + x, offsetY + z, color);
}
}
}
}
//http://www.minecraftwiki.net/wiki/Region_file_format
public void Read(String path, int startX, int endX, int startZ, int endZ)
{
Chunks = new Chunk[32, 32];
Match m = Regex.Match(path, @"r\.(-?\d+)\.(-?\d+)\.mca");
Coords.X = int.Parse(m.Groups[1].Value);
Coords.Z = int.Parse(m.Groups[2].Value);
if (!File.Exists(path))
return;
signal = new ManualResetEvent(false);
taskCount = (endX - startX + 1) * (endZ - startZ + 1);
byte[] header = new byte[8192];
using (MemoryMappedFile file = MemoryMappedFile.CreateFromFile(path, FileMode.Open))
{
using (MemoryMappedViewStream reader = file.CreateViewStream())
{
reader.Read(header, 0, 8192);
for (int chunkZ = startZ; chunkZ <= endZ; chunkZ++)
{
for (int chunkX = startX; chunkX <= endX; chunkX++)
{
Chunk c = new Chunk();
c.Coords.X = Coords.X;
c.Coords.Z = Coords.Z;
c.Coords.RegiontoChunk();
c.Coords.Add(chunkX, chunkZ);
int i = 4 * (chunkX + chunkZ * 32);
byte[] temp = new byte[4];
temp[0] = 0;
Array.Copy(header, i, temp, 1, 3);
if (BitConverter.IsLittleEndian)
Array.Reverse(temp);
long offset = ((long)BitConverter.ToInt32(temp, 0)) * 4096;
int length = header[i + 3] * 4096;
temp = new byte[4];
Array.Copy(header, i + 4096, temp, 0, 4);
if (BitConverter.IsLittleEndian)
Array.Reverse(temp);
c.Timestamp = BitConverter.ToInt32(temp, 0);
if (offset == 0 && length == 0)
{
Chunks[chunkX, chunkZ] = c;
if (Interlocked.Decrement(ref taskCount) == 0)
signal.Set();
continue;
}
reader.Seek(offset, SeekOrigin.Begin);
temp = new byte[4];
reader.Read(temp, 0, 4);
if (BitConverter.IsLittleEndian)
Array.Reverse(temp);
int exactLength = BitConverter.ToInt32(temp, 0);
c.CompressionType = (byte)reader.ReadByte();
c.RawData = new byte[exactLength - 1];
reader.Read(c.RawData, 0, exactLength - 1);
Chunks[chunkX, chunkZ] = c;
ThreadPool.QueueUserWorkItem(Decompress, c);
}
}
reader.Close();
}
}
signal.WaitOne();
signal.Dispose();
signal = null;
}
// DIRTY: this class can be done in a less confusing way!
public static void AddToMesh(Chunk chunk, int x, int y, int z, int id, List<Vector3> vertices, List<int> triangles, List<Vector2> uv)
{
// top
if (chunk == null || chunk.IsTransparent(x, y + 1, z))
AddFace(new Vector3(x, y + 1, z), id, Vector3.up, vertices, triangles, uv);
// bottom
if (chunk == null || chunk.IsTransparent(x,y - 1,z))
AddFace(new Vector3(x, y, z), id, Vector3.down, vertices, triangles, uv);
// left
if (chunk == null || chunk.IsTransparent(x - 1, y, z))
AddFace(new Vector3(x, y, z + 1), id, Vector3.left, vertices, triangles, uv);
// right
if (chunk == null || chunk.IsTransparent(x + 1, y, z))
AddFace(new Vector3(x + 1, y, z + 1), id, Vector3.right, vertices, triangles, uv);
// front
if (chunk == null || chunk.IsTransparent(x, y, z + 1))
AddFace(new Vector3(x, y, z + 1), id, Vector3.forward, vertices, triangles, uv);
// back
if (chunk == null || chunk.IsTransparent(x, y, z - 1))
AddFace(new Vector3(x, y, z), id, Vector3.back, vertices, triangles, uv);
}
//http://www.minecraftwiki.net/wiki/Region_file_format
public void Read(String path)
{
Chunks = new Chunk[32, 32];
Match m = Regex.Match(path, @"r\.(-?\d+)\.(-?\d+)\.mc[ar]");
Coords.X = int.Parse(m.Groups[1].Value);
Coords.Z = int.Parse(m.Groups[2].Value);
byte[] header = new byte[8192];
using (BinaryReader file = new BinaryReader(File.Open(path, FileMode.Open)))
{
file.Read(header, 0, 8192);
for (int chunkZ = 0; chunkZ < 32; chunkZ++)
{
for (int chunkX = 0; chunkX < 32; chunkX++)
{
Chunk c = new Chunk();
c.Coords.X = Coords.X;
c.Coords.Z = Coords.Z;
c.Coords.RegiontoChunk();
c.Coords.Add(chunkX, chunkZ);
int i = 4 * (chunkX + chunkZ * 32);
byte[] temp = new byte[4];
temp[0] = 0;
Array.Copy(header, i, temp, 1, 3);
if (BitConverter.IsLittleEndian)
Array.Reverse(temp);
long offset = ((long)BitConverter.ToInt32(temp, 0)) * 4096;
int length = header[i + 3] * 4096;
temp = new byte[4];
Array.Copy(header, i + 4096, temp, 0, 4);
if (BitConverter.IsLittleEndian)
Array.Reverse(temp);
c.Timestamp = BitConverter.ToInt32(temp, 0);
if (offset == 0 && length == 0)
{
Chunks[chunkX, chunkZ] = c;
continue;
}
file.BaseStream.Seek(offset, SeekOrigin.Begin);
temp = new byte[4];
file.Read(temp, 0, 4);
if (BitConverter.IsLittleEndian)
Array.Reverse(temp);
int exactLength = BitConverter.ToInt32(temp, 0);
c.CompressionType = file.ReadByte();
if (c.CompressionType == 1) //GZip
{
c.RawData = new byte[exactLength - 1];
file.Read(c.RawData, 0, exactLength - 1);
GZipStream decompress = new GZipStream(new MemoryStream(c.RawData), CompressionMode.Decompress);
MemoryStream mem = new MemoryStream();
decompress.CopyTo(mem);
mem.Seek(0, SeekOrigin.Begin);
c.Root = new TAG_Compound(mem);
}
else if (c.CompressionType == 2) //Zlib
{
c.RawData = new byte[exactLength - 1];
file.Read(c.RawData, 0, exactLength - 1);
ZlibStream decompress = new ZlibStream(new MemoryStream(c.RawData), CompressionMode.Decompress);
MemoryStream mem = new MemoryStream();
decompress.CopyTo(mem);
mem.Seek(0, SeekOrigin.Begin);
c.Root = new TAG_Compound(mem);
}
else
{
throw new Exception("Unrecognized compression type");
}
Chunks[chunkX, chunkZ] = c;
}
}
file.Close();
}
}
private static void RenderChunktobePopulated(Chunk c, Graphics g, Brush brush, int offsetX, int offsetY)
{
if (((byte)c.Root["Level"]["TerrainPopulated"]) == 0)
{
g.FillRectangle(brush, offsetX, offsetY, 16, 16);
}
}
private static void RenderChunkBiomes(Chunk c, Bitmap b, String[,] toolTips, int offsetX, int offsetY)
{
TAG t = null;
if (c.Root["Level"].TryGetValue("Biomes", out t))
{
byte[] biomes = (byte[])t;
for (int z = 0; z < 16; z++)
{
for (int x = 0; x < 16; x++)
{
byte biome = biomes[x + z * 16];
Color color;
if (BiomeType.Biomes[biome] != null)
{
color = BiomeType.Biomes[biome].Color;
toolTips[offsetX + x, offsetY + z] = BiomeType.Biomes[biome].Name;
}
else
{
color = Color.Black;
toolTips[offsetX + x, offsetY + z] = String.Format("Unknown biome: {0}", biome);
}
b.SetPixel(offsetX + x, offsetY + z, color);
}
}
}
else
{
for (int z = 0; z < 16; z++)
{
for (int x = 0; x < 16; x++)
{
toolTips[offsetX + x, offsetY + z] = BiomeType.Biomes[(int)Biome.Unspecified].Name;
b.SetPixel(offsetX + x, offsetY + z, BiomeType.Biomes[(int)Biome.Unspecified].Color);
}
}
}
}
