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Re: Unwanted lined in PDF-exported Graphics3D

  • To: mathgroup at smc.vnet.net
  • Subject: [mg86690] Re: Unwanted lined in PDF-exported Graphics3D
  • From: Szabolcs Horvát <szhorvat at gmail.com>
  • Date: Wed, 19 Mar 2008 05:20:19 -0500 (EST)
  • Organization: University of Bergen
  • References: <fro362$i47$1@smc.vnet.net>

Mariano Suárez-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_thread/thread/2f61a13953fc1973/553f73ed80fea6c3#553f73ed80fea6c3


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