Wolfram Demonstrations Projecthttp://demonstrations.wolfram.com/An Open Resource of Interactive Mathematica VisualizationsCopyright 2009 Wolfram Demonstrations Project & ContributorsGeodesics and Conjugate Loci on a Torushttp://demonstrations.wolfram.com/GeodesicsAndConjugateLociOnATorus/]]>http://demonstrations.wolfram.com/GeodesicsAndConjugateLociOnATorus/