A java implementation of the HPA* algorithm.
This is based on the paper titled Near Optimal Hiearchial Path-Finding by Adi Botea, Martin Müller, and Jonathan Schaeffer of the Department of Computing Science, University of Alberta.
The paper in pdf form is located at https://webdocs.cs.ualberta.ca/~mmueller/ps/hpastar.pdf at the time of writing this. The library that some classes are based on can be found here https://webdocs.cs.ualberta.ca/~games/pathfind/libpathfind/0.1.0/doc/index.html