Re: show mesh in mayavi2, segfault

Ondrej Certik wrote:
> Hi,
> 
> I'd like to visualize a finite element mesh in mayavi2. I have it in
> .vtk file. Is there a way to tell mayavi2 to show it? I didn't figure
> it out.

This should work:

$ mayavi2 -d foo.vtk -m Outline -m IsoSurface

BTW, which version of mayavi2 are you talking about?

$ mayavi2 -V

should help.

> So I adapted this script:
> 
> http://paste.debian.net/11654/
> 
> and it works fine, it shows 4 triangles. Now I'd like to import our
> FEM package that can read the .vtk file and get the mesh data, but
> mayavi2 segfaults, if I uncomment the line 15 in the above script...
> How is that possible?

Good question.  Can you run the script like so:

$ mayavi2 -x show_grid.py

Could you check if that works for now and we can move from there.

[...]

> The sfepy package can be found at: http://code.google.com/p/sfepy/
> 
> Do you have any pointers? If it segfaults, its not very usable, so I'd
> like to fix it. Looking at Objects/frameobject.c:559 it contains:

I suspect it has something to do with the hack we use to allow a user to 
run our standard examples as python example.py *and* mayavi2 example.py. 
  In order to be able to run it as python example.py we need to start up 
mayavi and re-execute the code to run.  It is a hack but we really 
wanted users to be able to run the script as python example.py.

cheers,
prabhu