[Gmsh] Patch: minimal arrow size

[Christophe Geuzaine]

Jir(í Hnídek wrote:
> Hi,
> I created small patch of GMSH source code. This patch is created from 2
> days old cvs source snapshot (I mentione this, because noticed lot of
> new code in last cvs snapshot). This patch adds option to change minimal
> arrow size. Hopefully, this screenshot describes more:
> 
> http://dl.getdropbox.com/u/369894/GMSH_minimal_arrow_size.png
> 
> Why is it useful for us? We try to do visualization of water flow in a
> underground (simulation of poisoned water, simulation of
> decontamination, etc). There are areas with large flow speed (rifts) and
> very small flow speed (massif). Flows in massif are sometimes so small,
> that are invisible with logarithmic value scale. This option could help
> us see and understand processes in underground better :-).
> 

Hi Jiri - Thanks for the patch. This could indeed be very interesting: 
we'll have a look.

Another thing you could try is to select the "logarithmic" value scale 
mode. That's the mode we usually use when we visualizae vector fields 
with large variations. How does it work on your dataset?


> If you will find my patch interesting, then let me know, I can recreate
> it against new cvs source snapshot. I will try to ask again. Do you have
> any public cvs repository? This would help me very much. Are you

Not public, but we create accounts for frequent contributors.

> interested in any cooperation? I have some ideas to improve GMSH. What

Of course! Don't hesitate to contact us with ideas, remarks, etc.

Cheers,

Christophe

> about my experience with development of graphical programs? Look at my
> ohloh profile: http://www.ohloh.net/accounts/jirihnidek
> 
> Best Regards,
> 
> Jiri
> 
> 
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-- 
Prof. Christophe Geuzaine
University of Liege, Electrical Engineering and Computer Science
http://www.montefiore.ulg.ac.be/~geuzaine