I wrote and update an applet (openGL version) for parametric surfaces, using the very good library gl4java.
With it, the applet is accessible on the net at :
http://perso.wanadoo.fr/aetius.attila/Cafe/SurfaceGL/SurfaceGLBase.html
Can you try this version and say to me if the program is correst on your computer (gime your configuration/video card…)
Thank’s