[Paraview] ProgrammableSource script executed multiple times on Render()

[David E DeMarle]

This can happen when the extents requested by the pipeline are not
satisfied by the filter. Compare with what the request information
method script says you can provide, with what is requested of and
actually provides by the request data script.

David E DeMarle
Kitware, Inc.
R&D Engineer
21 Corporate Drive
Clifton Park, NY 12065-8662
Phone: 518-881-4909


On Mon, Jun 4, 2012 at 11:53 AM, Hal Canary <hal at cs.unc.edu> wrote:
> Hello,
>
> I have the following macro which creates a ProgrammableSource in ParaView.
>  I'm wondering why the script seems to be called three separate times:
>
>        script = """
>        import time
>        print 'Script was called.',
>        print time.strftime('%H:%M:%S')+'.%03d'%(time.time()%1.0*1000)
>        self.GetImageDataOutput().SetDimensions(100,100,1)
>        # ... do something expensive here ...
>        """
>        script_request_information = """
>        from paraview import util
>        util.SetOutputWholeExtent(self, [0, 100, 0, 100, 0, 0])
>        """
>        ps = ProgrammableSource(
>                OutputDataSetType='vtkImageData',
>                Script=script,
>                ScriptRequestInformation=script_request_information)
>        GetDisplayProperties(ps).Visibility = 1
>        Render()
>
> It prints out once when I turn on visibility and two more times when I
> Render().  How can I keep the script from running more than once?
>
> Thanks!
>
> --
> Hal Canary
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