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MathGroup Archive 2001

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Re: coloring everything outside a circle

  • To: mathgroup at smc.vnet.net
  • Subject: [mg31904] Re: coloring everything outside a circle
  • From: Jens-Peer Kuska <kuska at informatik.uni-leipzig.de>
  • Date: Tue, 11 Dec 2001 01:33:39 -0500 (EST)
  • Organization: Universitaet Leipzig
  • References: <9uf7iv$fiv$1@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

Hi,

you can't do this in Mathematica, because Mathematica
generate a PostScript path and close it with "stroke"
command. Since the PostScript interpreter of Mathematica
interpret not the full PostScript header definitions
it will see only the /Mfstroke and /Mistroke commands
in the PostScript and make lines. 

But you can over write the /Mfstroke and /Mistroke definitions
in the Prolog option and a external PostScript interpreter
like ghostscript will work correctly. Here is an example

gg = ParametricPlot[{Cos[t], Sin[t]}, {t, 0, 2Pi},
    Prolog -> {PostScript[
          "/Mfstroke {fill currentdash pop 0 setdash} bind def"],
        PostScript["/Mistroke {} bind def"]}];

Export["test.eps", gg, "EPS"]


Now look to test.eps with ghostscript or print the file and
you have a filled curve.

Regards
  Jens

Mipam wrote:
> 
> Hi,
> 
> Is it possible with Mathematica to draw a circle,
> or parametricplot and paint everything white outside that circle,
> or closed curve (which is given by parametricplot)?
> 
> Or is it possible to paint everything white between two closed
> curves or circles?
> Plz also cc to mipam at ibb.net for i aint subscribed to this list.
> Bye,
> 
> Mipam.


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