[Haskell-cafe] Plotting parametric functions in Haskell

Hello, I think it would be interesting to plot and visualize parametric (and other kind of functions) using the haskell language to define them [functions]. Does anyone know about some software or API that does just that? I started writing a plotter to do that using hopengl. But my computer graphics skills are rather bad and I couldn't produce anything really useful. []'s Rafael