/// <summary>
/// Deletes a chunk from the underlying data store at the given local coordinates relative to this region.
/// </summary>
/// <param name="lcx">The local X-coordinate of a chunk relative to this region.</param>
/// <param name="lcz">The local Z-coordinate of a chunk relative to this region.</param>
/// <returns>True if there is a chunk was deleted; false otherwise.</returns>
/// <remarks>If the local coordinates are out of bounds for this region, the action will be forwarded to the correct region
/// transparently.</remarks>
public bool DeleteChunk(int lcx, int lcz)
{
if (!LocalBoundsCheck(lcx, lcz))
{
IRegion alt = GetForeignRegion(lcx, lcz);
return((alt == null) ? false : alt.DeleteChunk(ForeignX(lcx), ForeignZ(lcz)));
}
RegionFile rf = GetRegionFile();
if (!rf.HasChunk(lcx, lcz))
{
return(false);
}
rf.DeleteChunk(lcx, lcz);
ChunkKey k = new ChunkKey(ChunkGlobalX(lcx), ChunkGlobalZ(lcz));
_cache.Remove(k);
if (ChunkCount() == 0)
{
_regionMan.DeleteRegion(X, Z);
_regionFile.Target = null;
}
return(true);
}
// XXX: Consider revising foreign lookup support
/// <inherits />
public ChunkRef GetChunkRef(int lcx, int lcz)
{
if (!LocalBoundsCheck(lcx, lcz))
{
IRegion alt = GetForeignRegion(lcx, lcz);
return((alt == null) ? null : alt.GetChunkRef(ForeignX(lcx), ForeignZ(lcz)));
}
int cx = lcx + _rx * XDIM;
int cz = lcz + _rz * ZDIM;
ChunkKey k = new ChunkKey(cx, cz);
ChunkRef c = _cache.Fetch(k);
if (c != null)
{
return(c);
}
c = ChunkRef.Create(this, lcx, lcz);
if (c != null)
{
_cache.Insert(c);
}
return(c);
}
public ChunkRef Fetch(ChunkKey key)
{
ChunkRef c;
if (!_cache.TryGetValue(key, out c))
{
return(null);
}
return(c);
}
public bool Insert(ChunkRef chunk)
{
ChunkKey key = new ChunkKey(chunk.X, chunk.Z);
ChunkRef c;
if (!_cache.TryGetValue(key, out c))
{
_cache[key] = chunk;
return(true);
}
return(false);
}
private IBoundedDataBlockCollection GetChunk(int x, int z)
{
int cx = x / _xdim + (x >> 31);
int cz = z / _zdim + (z >> 31);
ChunkKey key = new ChunkKey(cx, cz);
IBoundedDataBlockCollection chunk;
if (!_chunks.TryGetValue(key, out chunk))
{
chunk = OnResolveNeighbor(cx, 0, cz);
_chunks[key] = chunk;
}
return(chunk);
}
public bool Remove(ChunkKey key)
{
_dirty.Remove(key);
return(_cache.Remove(key));
}
