ParamtricPlot3D

*To*: mathgroup at smc.vnet.net*Subject*: [mg32119] ParamtricPlot3D*From*: Erich Neuwirth <erich.neuwirth at univie.ac.at>*Date*: Fri, 28 Dec 2001 02:41:34 -0500 (EST)*Sender*: owner-wri-mathgroup at wolfram.com

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