Wolfram Demonstrations Projecthttp://demonstrations.wolfram.com/An Open Resource of Interactive Mathematica VisualizationsCopyright 2009 Wolfram Demonstrations Project & ContributorsShortest Path between Two Points in the Unit Disk Reflecting off the Circumferencehttp://demonstrations.wolfram.com/ShortestPathBetweenTwoPointsInTheUnitDiskReflectingOffTheCir/]]>http://demonstrations.wolfram.com/ShortestPathBetweenTwoPointsInTheUnitDiskReflectingOffTheCir/