Draining a Polygon - or - Rolling a Ball out of a Polygon.

Greg Aloupis Jean Cardinal Sébastien Collette Ferran Hurtado Stefan Langerman Joseph O'Rourke Draining a Polygon - or - Rolling a Ball out of a Polygon. 2008 CCCG conf/cccg/2008 db/conf/cccg/cccg2008.html#AloupisCCHLO08