Vtk/Python imageWarp.py example

[Dean N. Williams]

Hi David,

    Thanks for answering my question. But the Vtk/Python examples continue
    to not respond with the "renWin.Render()" call just before the "iren.Start()".

    For example, the code now has:

# prevent the tk window from showing up then start the event loop
#wm withdraw .
renWin.Render()
iren.Start()

    But when I try to execute the code "spToPd.py", I get nothing! Not even
    a canvas! It doesn't core dump either.

    By adding: "USER_CFLAGS = -O2 -D__NO_MATH_INLINES" and
    "USER_CXXFLAGS = -O2 -D__NO_MATH_INLINES" to the user.make
    file, I am now able to run examples like headBone.py and
TestImageMarchingCubes.py.
    Is there something else that I should remove or add in order to run the
examples:
    "imageWarp.py",  "thrshldV.py", "spToPd.py", and "officeStreamPoints.py"?

    It was suggested in a response that I remove the -DVTK_USE_PTHREADS from
CFLAGS
    and CXXFLAGS in the system.make file and then recompile. I did this as well
and still
    the same response. Nothing happens when executing the command. That is, no
canvas,
    no seg fault, no nothing. It just sit there.

    Can anyone give me some guidance on the error? I must get this to work.

    Thanks in advance for any suggestions or comments...

Best Regards,
    Dean

>
> The VTK/Python bug you describe has been around, at least on my
> system, since vtk 2.3 or thereabouts).  It has been reported two or
> three times.  Several of the examples in graphics/examplesPython are
> afflicted.  The bug is not present under Windows, only UNIX.
>
> The symptoms are: an empty window pops up, and clicking in the
> window results in a segfault.
>
> An easy work around is to add "renWin.Render()" immediately
> before "iren.Start()".
>
>  - David
>
> --David Gobbi, MSc                    dgobbi at irus.rri.on.ca
>   Advanced Imaging Research Group
>   Robarts Research Institute, University of Western Ontario
>
> On Fri, 8 Oct 1999, Dean N. Williams wrote:
>
> > Dear Vtk community,
> >
> >     I am developing Vtk visualization using the Python interface and
> > PC/Linux Red Hat 5.2.
> >
> >     I am noticing that certain Vtk/Python scripts are not working. For
> > example: imageWarp.py
> >     just sits at the prompt and does not core dump or display a canvas
> > with an image.
> >
> >     Other do nothing Vtk/Python scripts are: thrshldV.py, spToPd.py, and
> > officeStreamPoints.py
> >
> >     Has anyone else using Vtk/Python run across this same problem, and
> > how did you fix it?
> >
> >     Thanks in advance.
> >
> > Best Regards,
> >         Dean
> >
> >
> > --
> > Dean N. Williams
> > Computer Scientist/Computation Group Leader             o
> > Lawrence Livermore National Laboratory                --
> > Livermore, California 94550                          `\< *
> > Phone: (925) 423-0145    FAX: (925) 422-7675        /  \
> > http://www-pcmdi.llnl.gov                         williams13 at llnl.gov
> >
> >
> >
> >
> >
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> >

--
Dean N. Williams
Computer Scientist/Computation Group Leader             o
Lawrence Livermore National Laboratory                --
Livermore, California 94550                          `\< *
Phone: (925) 423-0145    FAX: (925) 422-7675        /  \
http://www-pcmdi.llnl.gov                         williams13 at llnl.gov





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