Re: Graphics3D of the official "arbitrary surface"
- To: mathgroup at smc.vnet.net
- Subject: [mg76178] Re: Graphics3D of the official "arbitrary surface"
- From: Jens-Peer Kuska <kuska at informatik.uni-leipzig.de>
- Date: Thu, 17 May 2007 06:02:49 -0400 (EDT)
- Organization: Uni Leipzig
- References: <f2em3g$2oo$1@smc.vnet.net>
- Reply-to: kuska at informatik.uni-leipzig.de
Hi, form Plot3D[] or ParametricPlot3D[] you get an polygonal approximation of the surface but never the surface. If you wish to use the polygons just take the first argument of the Graphics3D[] object or for versions < 5.2 convert the SurfaceGraphics[] to a Graphis3D[] object. Regards Jens Hatto von Aquitanien wrote: > In virtually every math book which deals with multivariable/multi-valued > functions, there are diagrams showing an "arbitrary surface". Often there > is a vector and/or a curve drawn on that surface. The surface itself is > the kind of thing we get from Plot3D or ParametricPlot3D. I know I can > coble together a surface from polygons, but seems reasonable that there > should be a way of using what's already built in. Is the way to do this > simply to use Plot3D or ParametricPlot3D, and pull the graphics data out of > the resulting object? > > I'd like to be able to simply create a surface "in place" rather than having > to transform some externally generated object into place. If I want to > create the surface directly without using Plot3D, etc., does that mean I > have to roll my own from scratch?