BKDTree offers a simple and high performant implementation of a growing only BKDTree<T> and a static KDTree<T> for C# and .NET.
A BKDTree and an KDTree allow storing any queying of multidimensional data. Non of these support a method for removing items.
For nearest neighbor queries there are dediated variants like MetricBKDTree<T> and MetricKDTree<T>. As nearest neighbor queries require to calculate euclidean distance between values T must implement IMetricTreeItem<in T>.
Items of type T that shall be stored in a BKDTree<T> or a KDTree<T> must implement the interface ITreeItem<T> with its method CompareDimensionTo().
public interface ITreeItem<in T>
{
int CompareDimensionTo(T other, int dimension);
}For nearest neighbor queries there are dediated variants MetricBKDTree<T> and MetricKDTree<T> while T must implement IMetricTreeItem<in T> to allow calculation of euclidean distance between values.
public interface IMetricTreeItem<in T> : ITreeItem<T>
{
double GetDimension(int dimension);
}Contributions are welcome.
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