bool loadDatabase()
{
Info.print("Loading game world: {0}", myFilename);
if (File.Exists(myFilename) == false)
{
Error.print("Unable to find game world {0}", myFilename);
return(true);
}
using (BinaryReader reader = new BinaryReader(File.Open(myFilename, FileMode.Open)))
{
//read the header
Char[] fileType = reader.ReadChars(4);
if (fileType[0] != 'O' ||
fileType[1] != 'C' ||
fileType[2] != 'T' ||
fileType[3] != 'A')
{
return(false);
}
int version = reader.ReadInt32();
if (version != 1)
{
return(false);
}
int indexCount = reader.ReadInt32();
Info.print("Reading {0} chunk records", indexCount);
for (int i = 0; i < indexCount; i++)
{
ChunkCache ti = new ChunkCache();
UInt64 id = reader.ReadUInt64();
ti.byteCount = reader.ReadInt32();
ti.compresedData = reader.ReadBytes(ti.byteCount);
myCacheDb[id] = ti;
//update metric
sizeInBytes += ti.byteCount;
chunkCount++;
}
Info.print("Done");
}
return(true);
}
public Chunk findChunk(UInt64 id)
{
Chunk chunk = null;
ChunkCache ti = null;
if (myCacheDb.TryGetValue(id, out ti) == false) // is it loaded, but compressed?
{
return(null); //this means that the generator needs to create it
}
else //decompress it
{
chunk = new Chunk(Vector3.Zero);
chunk.chunkKey = new ChunkKey(id);
if (ti.byteCount != 0)
{
byte[] data = decompressChunk(ti.compresedData);
chunk.deserialize(data);
}
}
return(chunk);
}