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MathGroup Archive 1999

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Re: Removing Graphics3D polygon edges

  • To: mathgroup at smc.vnet.net
  • Subject: [mg18981] Re: Removing Graphics3D polygon edges
  • From: "Allan Hayes" <hay at haystack.demon.co.uk>
  • Date: Tue, 3 Aug 1999 13:44:30 -0400
  • References: <7nrdrp$ibd@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

Greg Keogh <greg at mira.net> wrote in message news:7nrdrp$ibd at smc.vnet.net...
> Hello from Melbourne Australia,
>
> I can't figure out how to remove the edges of polygons on the surface of a
> Graphics3D object created by a ParametricPlot3D. The skeleton of my call
> looks like this:
>
> ParametricPlot3D[{ , , },{ , , },{ , , },
>       BoxRatios->{1,1,2},Axes->False,Boxed->False,
>       PlotPoints->40]
>
> I want the equivalent smooth appearance one gets from Mesh->False in a
> surface plot. I think I'm supposed to include an EdgeForm[] directive, but
I
> 'm having trouble with the syntax.
>
> Cheers,
> Greg Keogh greg at mira.net
>


ParametricPlot3D allows a fourth coordintate for styling:  we put the
directive EdgeForm[] in this

ParametricPlot3D[{ x, y , x y , EdgeForm[]}, {x , -1 , 1}, {y , -1, 1},
BoxRatios -> {1, 1, 2}, Axes -> False, Boxed -> False,
PlotPoints -> 40]

We can do much more:

ParametricPlot3D[{ x, y , x y , {EdgeForm[], FaceForm[Hue[x]] }} (*List
needed*), {x , -1 ,
    1}, {y , -1, 1},
BoxRatios -> {1, 1, 2}, Axes -> False, Boxed -> False,
PlotPoints -> 40,
  Lighting -> False]

This sort of thing  is dealt with  in Mathamatica in Education and Research,
Vol 8 No.1 Winter 1999 pp 35-40


Allan
---------------------
Allan Hayes
Mathematica Training and Consulting
Leicester UK
www.haystack.demon.co.uk
hay at haystack.demon.co.uk
Voice: +44 (0)116 271 4198
Fax: +44 (0)870 164 0565





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