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Re: Graphics3D of the official "arbitrary surface"
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?