[PyFeyn] New marker for PyFeyn

[George S. Williams]

Hello, Jeremi,

Thanks for the contribution. I tested it by adding the code to points.py 
and it works great. The main developers are generally receptive to 
additions that are useful to the community, so I think that this is a 
good candidate for inclusion in a future update to PyFeyn.

I would like to look into the problem that you had with 0.3.4. If you 
could briefly describe the problem, and tell me what operating system 
and versions of Python and PyX you are using I would appreciate it.

Thanks,
George


On 3/21/2014 1:11 PM, Jeremi Piotrowski wrote:
> Hi,
>
> To begin with, I would like to thank you for creating this awesome 
> package. As a master student in physics, being able to plot feynman 
> diagrams (in the wonderful language that is python) has made my life a 
> heck of a lot easier.
> I have however found the need for markers shaped like an "X" to 
> symbolize neutrino oscillations. I could do that by creating 2 pairs 
> of points and joining points within a pair with a line, but I decide 
> to go for a more permanent solution. So I wrote a piece of code, 
> defining the CrossMark class, with the size of the cross depending on 
> the "size" parameter.
> It's a very easy code, I'm sending it to you in the attachment, if you 
> choose to you could incorporate it into the main code (I work with 
> pyfeyn 0.3.3, 0.3.4 doesn't work for me for some reason).
> So once again, thank you and keep up the good work.
>
> Jeremi
>
> PS. I'm thinking of writing a "zig-zag" line class, that's the 
> convention I was taught for weak interaction bosons.
>