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Re: ParamtricPlot3D

• To: mathgroup at smc.vnet.net
• Subject: [mg32132] Re: ParamtricPlot3D
• From: Ronald Bruck <bruck at math.usc.edu>
• Date: Sat, 29 Dec 2001 00:46:52 -0500 (EST)
• References: <a0h7np$spj$1@smc.vnet.net>
• Sender: owner-wri-mathgroup at wolfram.com

Have you tried the add-on MathGL3D? 

<http://phong.informatik.uni-leipzig.de/~kuska/mathgl3dv3/index.htm>

Speaking of which, does anybody know if there's going to be a version
of this for Mac OS X?

--Ron Bruck

In article <a0h7np$spj$1 at smc.vnet.net>, Erich Neuwirth
<erich.neuwirth at univie.ac.at> wrote:

> when displaying s sphere with
> 
> ParametricPlot3D[{Sin[u]*Cos[v],Cos[u]*Cos[v],Sin[v]},{u,-Pi,Pi},{v,-Pi,Pi}]
> 
> the resultig display does NOT have a convex surface.
> 
> and so does
> ParametricPlot3D[{Sin[u]*Sin[v],Cos[u]*Sin[v],Cos[v]},{u,-Pi,Pi},{v,-Pi,Pi}]
> 
> 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 http://sunsite.univie.ac.at
> Phone: +43-1-4277-38624 Fax: +43-1-4277-9386