Javadoc
Radius neighbor search in an Euclidean space. The interface describes
implementations that perform the search for a specified reference location
and radius, and provide access to the data, location, and distance of the
found neighbors until the next search is performed. For every search, the
user can choose whether the found neighbors are returned in arbitrary order
or sorted by distance to the reference location.
In a multi-threaded application, each thread will need its own
RadiusNeighborSearch.