Date: Sun, 27 Aug 2017 10:31:18 -0500 From: Antonio Olivares <olivares14031@gmail.com> To: Matthew Seaman <matthew@freebsd.org> Cc: "freebsd-questions@freebsd.org" <freebsd-questions@freebsd.org> Subject: Re: Create a truncated icosahedron with gnuplot or metapost Message-ID: <CAJ5UdcO2NM7rEgYeRzNM12SyacA1cC8Jb%2BzcGDDbMXckSguyRg@mail.gmail.com> In-Reply-To: <17630349-aa61-9a03-8aa6-bfe7b8f395ce@FreeBSD.org> References: <CAJ5UdcNcEg3PVUVs9W=OyZdujDbtdxYQTZsQgmXYiOwYy9BpPQ@mail.gmail.com> <17630349-aa61-9a03-8aa6-bfe7b8f395ce@FreeBSD.org>
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On Sunday, August 27, 2017, Matthew Seaman <matthew@freebsd.org> wrote: > On 27/08/2017 14:51, Antonio Olivares wrote: > > Dear freebsd-users, > > > > In looking for a way to draw a royalty free soccer ball with open source > > software like gnuplot or metapost, I have found a promising page > > > > http://math.lbl.gov/voro++/examples/platonic/ > > > > I have to run the programs there, but the problem becomes how can we > shade > > the pentagons in black. We can create a sphere in gnuplot, but to change > > the faces into pentagons and hexagons? > > > > http://soukoreff.com/gnuplot/ > > > > I have found a nice page that uses java to draw a soccerball > > > > http://www.hoist-point.com/soccerball.htm > > > > If somehow the github code can be converted to metapost?, or generated to > > get the points and then get the shading correctly. I hope someone can > > help. I have also looked into metapost extensions by Anthony Phan m3D > > package > > > > http://www-math.univ-poitiers.fr/~phan/m3Dplain.html > > > > And unfortunately I do not know enough of metapost coding, other than > > copying examples and run them on my machines. Is there a nice idiot > proof > > way of drawing a soccerball or a truncated icosahedron with gnuplot or > > metapost? If anyone can help/advice/suggest please share your thoughts. > > Is it specifically a truncated icosahedron you want, or a soccer ball? > Because there's this: > > https://en.wikipedia.org/wiki/File:Soccerball.svg > > which is freely available under a creative commons license. You should > be able to use an application like Inkscape (https://inkscape.org/en/) > to manipulate that image. > > There's many other examples of soccerballs available, or indeed > truncated icosahedrons. Just google for 'soccer ball clipart svg' > > Cheers, > > Matthew > > I actually want to be able to draw either but on my own pc and not copy any image out in the www. I would like to draw the soccerball using metapost or gnuplot. Then include it in a tex/latex document. I had a 2d image with points using gnuplot, but it is not mathematically precise. A better image of better quality and I can use my own machine to create it is what I am looking for. Someone has helped generate a soccer field in 3d with metapost, I have created a soccerfield using gnuplot, but I do not have a nice soccerball to include it. The 3d image hopefully can be used to make a shirt as many of our students do not like what the designers provide. A nice accurate picture generated with precision is what is needed. I appreciate some thoughts as well. There is a soccerball generated by tikz on stackexchange, but I do not have texlive on my machine sadly. It is to our advantage to have it on gnuplot or metapost as students can see the mathematics behind it. Best Regards, Antonio
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