Wolfram Demonstrations Projecthttp://demonstrations.wolfram.com/An Open Resource of Interactive Mathematica VisualizationsCopyright 2009 Wolfram Demonstrations Project & ContributorsParametric Plots from Rectangular Plotshttp://demonstrations.wolfram.com/ParametricPlotsFromRectangularPlots/]]>http://demonstrations.wolfram.com/ParametricPlotsFromRectangularPlots/