[Paraview] injecting objects from python

[Gertjan van Zwieten]

Hi Hal, thanks for your quick reply and the example code. That's very
helpful. I do have these remaining questions that perhaps you could help me
with:

   - In your experience, is a programmable source a suitable place to call
   a potentially long running finite element code?
   - Is it possible to update the data structure while it is already being
   displayed, that is, before the script finishes?
   - And is it possible to have a programmable source output multiple data
   sets if necessary?

Thanks again!
Gertjan


On Tue, Jun 19, 2012 at 12:44 PM, Hal Canary <hal at cs.unc.edu> wrote:

> On 06/19/2012 06:10 AM, Gertjan van Zwieten wrote:
>
>> [...]
>>
>> So my question is simply if it is possible to inject objects from python
>> into an already running or separately spawned paraview instance? If so,
>> any pointers in that direction (an example script?) would of course be
>> enormously helpful.
>>
>
> I use a programmable source.  Here's a macro to create an image:
>
> #####################
> script="""
> image = self.GetImageDataOutput()
> image.SetSpacing(0.01,0.01,0.**01)
> image.SetOrigin(0,0,0)
> image.SetDimensions(101,101,**101)
> array = numpy.zeros((101,101,101,), dtype=numpy.float32)
> space = numpy.linspace(0,1,101)
> for i,x in enumerate(space):
>        for j,y in enumerate(space):
>                for k,z in enumerate(space):
>                        array[i,j,k] = (math.sin(4*x)
>                                + math.sin(4*y) + math.sin(4*z))
> image.GetPointData().AddArray(
>        paraview.vtk.dataset_adapter.**numpyTovtkDataArray(
>                array.reshape(101*101*101), name="myarray"))
> """
> script_request_information = """
> from paraview import util
> util.SetOutputWholeExtent(**self, [0, 100, 0, 100, 0, 100])
> """
> ps = ProgrammableSource(
>  guiName="My Source",
>  Script=script,
>  ScriptRequestInformation=**script_request_information,
>  OutputDataSetType='**vtkImageData' )
> Show(ps)
> ##############################**#####
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