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MathGroup Archive 2001

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Re: Drawing transparent objects.

  • To: mathgroup at smc.vnet.net
  • Subject: [mg30223] Re: Drawing transparent objects.
  • From: Jens-Peer Kuska <kuska at informatik.uni-leipzig.de>
  • Date: Fri, 3 Aug 2001 00:55:55 -0400 (EDT)
  • Organization: Universitaet Leipzig
  • References: <9kav0b$c1o$1@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

Hi,

Mathematica does not support transparence
for PostScript (only PostScript level 3 does this). 

The only solution is to switch to MathGL3d

http://phong.informatik.uni-leipzig.de/~kuska/mathgl3dv3/

and use the MVAlpha option of the MVShow3D[] command.

To get really good renderings of transparent
surfaces you should export the 3d opbjects form
MathgL3d to POVRay or RenderMen and add some
refraction. The reason for that is, the human
eye expect refraction on transparent surfaces
but OpenGL can't do that.

Contact me, if you have problems/questions
with transparence in MathGL3d.

Regards
  Jens

Johannes Ludsteck wrote:
> 
> Dear MathGroup members,
> I would like to draw transparent three-
> dimensional objects
> (cuboids, graphs of functions and such things),
> i.e. objects with unfilled mesh.
> I searched the Mathematica book for a option or
> graphics directive, but didn't find one.
> Is there a simple way solve the problem or have I
> to do this by defining the graphics objects by
> hand?
> 
> Thanks for your help and best regards,
>         Johannes Ludsteck
> 
> <><><><><><><><><><><><><><><><><><>
> Johannes Ludsteck
> Institut fuer Volkswirtschaftslehre
> Lehrstuhl Prof. Dr. Moeller
> Universitaet Regensburg
> Universitaetsstrasse 31
> 93053 Regensburg
> Tel +49/0941/943-2741


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