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Re: Unwanted lined in PDF-exported Graphics3D

• To: mathgroup at smc.vnet.net
• Subject: [mg86789] Re: Unwanted lined in PDF-exported Graphics3D
• From: rych <rychphd at gmail.com>
• Date: Fri, 21 Mar 2008 01:52:38 -0500 (EST)
• References: <fro362$i47$1@smc.vnet.net> <frqphe$4mn$1@smc.vnet.net>

Yes, I can confirm the problem on 6.0.2 (AdobeAcrobat8 is installed
too). And it gets worse when using an online viewer
https://share.adobe.com/adc/adc.do?docid=86ab9d5b-f681-11dc-8d05-e59350926=
3b8
Igor



On Mar 20, 8:00 am, Mariano Su=E1rez-Alvarez
<mariano.suarezalva... at gmail.com> wrote:
> On Mar 19, 7:22 am, Szabolcs Horv=E1t <szhor... at gmail.com> wrote:
>
>
>
> > Mariano Su=E1rez-Alvarez wrote:
> > > Simple code as
>
> > > Export["test.pdf",
> > >  Graphics3D[{
> > >     Polygon[Table[Chop[{Cos[t], Sin[t], 0}], {t, 0, 2 Pi, 0.1}]]
> > >    }]
> > >  ]
>
> > > results in a PDF file which has lots of extra lines on the surface.
>
> > > Is there a way to get rid of them?
>
> > In this specific case I cannot see any lines with Adobe Reader 8.1.2.
> > However I think I know the problem that you are referring to.  The lines=

> > are an artifact of antialiasing, so there is not way to get rid of them
> > (apart from using a different PDF reader).
>
> > For some reason Mathematica likes to break up large polygons into many
> > small ones and their edges become visible.
>
> > See this thread:
>
> >http://groups.google.com/group/comp.soft-sys.math.mathematica/browse_...
>
> I guessed it was antialiasing. It very much
> destroys the esthetics of these graphics I'm
> working on (sets of symmetry planes of polyhedra,
> each one drawn as a disc), sadly, for PDF output.
>
> I guess I was wondering if there is some way
> to tell Mathematica to work harder and not use that
> many polygons. Rasterizing in order to include
> in a PDF seems like a very wrong path...
>
> Oh well.
>
> -- m