MathGroup Archive 2001

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  • Subject: [mg32119] ParamtricPlot3D
  • From: Erich Neuwirth <erich.neuwirth at>
  • Date: Fri, 28 Dec 2001 02:41:34 -0500 (EST)
  • Sender: owner-wri-mathgroup at

when displaying s sphere with


the resultig display does NOT have a convex surface.

and so does

in the second case, in the horizontal crosscuts
ther points go "in and out", one is close, ons is farther next is closer
to the center.

since i want to create 3d objects in other programs,
this is not good.

setting PlotPoints higher 
does not completely solve the problem.
is there an easy solution?

Erich Neuwirth, Computer Supported Didactics Working Group
Visit our SunSITE at
Phone: +43-1-4277-38624 Fax: +43-1-4277-9386

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