/// <summary>
/// Calculate the memory used by this node subgrid. Assume the sub grid reference is the size of a long (8 bytes)
/// </summary>
public int SizeOf()
{
var sum = 0;
if (_cells != null)
{
sum += SubGridTreeConsts.SubGridTreeDimension * SubGridTreeConsts.SubGridTreeDimension * sizeof(long);
}
if (_sparseCells != null)
{
sum += _sparseCells.Length * SubGridTreeSparseCellRecord.SizeOf();
}
sum += sizeof(short); // For sparse cell count
return(sum);
}
