[PyFeyn] [cedar] Bug report: Cannot draw straight gluino lines

[Sue Ann Koay]

Thanks for the speedy response. I was actually hunting for a
python-to-diagram interface because I wanted to write python script
that converts a feynman diagram specification given some dot-like
textual input, into a diagram. I could only think of an algorithm for
tree-level diagrams, but thanks to pyfeyn it works nicely and I'm
happy.

One feature that would really be nice would be for the text to be
rotatable (I tried the angle specification but it doesn't seem to have
an effect). In fact it would be lovely for long text lines to know how
to align themselves to the lines they are attached to (of course I can
also calculate tangents and set them by hand), because otherwise they
overlap with the lines themselves.

Anyway, my gratitude for the tool!

-- 
Sue Ann Koay
sueannkoay at gmail.com


On Dec 17, 2007 6:54 PM, Andy Buckley <andy at insectnation.org> wrote:
> Sue Ann Koay wrote:
> > Whenever I try to draw a gluino line just with Gluino(v1, v2), pyfeyn
> > doesn't like it:
>
> > The problem magically disappears when I do Gluino(v1, v2).bend(0.01).
> > bend(0) does not work either.
>
> Thanks for pointing this out! The problem was that for straight lines
> the curvature radius becomes infinite and we didn't have a check for
> that. I've fixed it now and pushed a bug fix version (source tarball)
> out to the HepForge downloads area. I'll upload new "egg" versions to
> the Python package archive later. The new version is 0.3.1.
>
> Please let us know if you find any other problems or if you have any
> feature / interface requirements - we've been having a "development
> break" to work on other things since the 0.3.0 release, but there's
> nothing like user demands to spur development!
>
> > I tried to submit this bug report via Trac, but there seemed to be
> > some unknown handshakes before I am allowed to do that, so I resorted
> > to email. I hope you don't mind.
>
> This is a problem that I'd like to fix (in my HepForge admin role).
> Trac's permissions are set on the server, so you need to have a login
> account to add tickets. Unfortunately if there's no protection, Trac
> gets spammed quite fast. In the meantime, I've made a PyFeyn "guest"
> Trac account (with password the same as the user name).
>
> Cheers,
> Andy
>