private void SplitBlock(SpatialSplitInfo spatialSplitInfo)
{
var block = spatialSplitInfo.Block;
lastBlock++;
var splitInfo = block.Split(GetFileName(lastBlock));
spatialSplitInfo.SplitByLatitude = splitInfo.SplitByLatitude;
spatialSplitInfo.SplitValue = splitInfo.SplitValue;
spatialSplitInfo.FirstChild = splitInfo.FirstChild;
spatialSplitInfo.SecondChild = splitInfo.SecondChild;
spatialSplitInfo.Block = null;
}
private void SplitToReducedSize(SpatialSplitInfo spatialSplitInfo)
{
if (spatialSplitInfo.Block == null)
{
SplitToReducedSize(spatialSplitInfo.FirstChild);
SplitToReducedSize(spatialSplitInfo.SecondChild);
}
else
{
if (spatialSplitInfo.Block.Size > ReducedBlockLimit)
{
SplitBlock(spatialSplitInfo);
SplitToReducedSize(spatialSplitInfo);
}
}
}
private void WriteSplitInfo(SpatialSplitInfo spatialSplitInfo, BinaryWriter writer)
{
if (spatialSplitInfo.Block == null)
{
writer.Write(spatialSplitInfo.SplitByLatitude ?(byte)1 : (byte)2);
if (!spatialSplitInfo.SplitValue.HasValue)
{
throw new InvalidOperationException("SpatialSplitInfo must have SplitValue when no Block is defined.");
}
writer.Write(spatialSplitInfo.SplitValue.Value);
WriteSplitInfo(spatialSplitInfo.FirstChild, writer);
WriteSplitInfo(spatialSplitInfo.SecondChild, writer);
}
else
{
spatialSplitInfo.Block.Flush();
writer.Write((byte)0);
writer.Write(spatialSplitInfo.Block.FileName);
}
}
