/// <summary>
/// Initializes a new instance of the <see cref="SPTreeNode"/> class.
/// </summary>
///
/// <param name="owner">The tree that this node belongs to.</param>
/// <param name="parent">The parent node for this node. Can be null if this node is the root.</param>
/// <param name="corner">The starting point of the spatial cell.</param>
/// <param name="width">The widths of the spatial cell.</param>
/// <param name="index">The index of this node in the children collection of its parent node.</param>
///
public SPTreeNode(SPTree owner, SPTreeNode parent, int index, double[] corner, double[] width)
: base(index)
{
int D = owner.Dimension;
this.owner = owner;
Parent = parent;
this.Index = index;
boundary = new SPCell(corner, width);
center_of_mass = new double[D];
buff = new double[D];
}
