Avneesh Sud Miguel A. Otaduy Dinesh Manocha DiFi: Fast 3D Distance Field Computation Using Graphics Hardware. 557-566 2004 23 Comput. Graph. Forum 3 http://dx.doi.org/10.1111/j.1467-8659.2004.00787.x db/journals/cgf/cgf23.html#SudOM04