[vtkusers] vtk window closes unexpectedly in vtkImageAccumulate

[David Gobbi]

Hi Lizeth,

Many (most?) of the tests are written to exit as soon as the window
pops up, because that's all the testing system needs.

The easiest way to get the program to stick around is to run python
with the "-i" option:

python -i TestAccumulate.py

To make the program stick around without the "-i" option, you have to
connect a vtkRenderWindowInteractor and then call interactor.Start()
at the end of the code.

 - David


On Mon, Dec 1, 2014 at 5:23 PM, Lizeth Castellanos <
castellanoslizan at gmail.com> wrote:

> Hello vtk-users!
>
>
> I'm using the TestAccumulate.py from
> http://vtk.org/gitweb?p=VTK.git;a=blob;f=Imaging/Core/Testing/Python/TestAccumulate.py;h=40054f0e43dbf7914f911815172d8c02378826ee;hb=HEAD
>
> I don't get see the result. The test ran without  compilation errors, but
> the vtk window closes unexpectedly.
>
> Any idea?
>
> Thanks!
>
> -Lizeth
>
> My Code here:
>
> #!/usr/bin/env python
> import vtk
> from vtk.test import Testing
>
> reader = vtk.vtkPNGReader()
> reader.SetFileName("/home/user/Downloads/fullhead15.png")
>
> smooth = vtk.vtkImageGaussianSmooth()
> smooth.SetDimensionality(2)
> smooth.SetStandardDeviations(1,1)
> smooth.SetInputConnection(reader.GetOutputPort())
>
> imageAppend = vtk.vtkImageAppendComponents()
> imageAppend.AddInputConnection(reader.GetOutputPort())
> imageAppend.AddInputConnection(smooth.GetOutputPort())
>
> clip = vtk.vtkImageClip()
> clip.SetInputConnection(imageAppend.GetOutputPort())
> clip.SetOutputWholeExtent(0,255,0,255,20,22)
>
> accum = vtk.vtkImageAccumulate()
> accum.SetInputConnection(clip.GetOutputPort())
> accum.SetComponentExtent(0,255,0,255,0,0)
> accum.SetComponentSpacing(12,12,0.0)
> accum.Update()
>
> viewer = vtk.vtkImageViewer()
> viewer.SetInputConnection(accum.GetOutputPort())
> viewer.SetColorWindow(4)
> viewer.SetColorLevel(2)
> viewer.Render()
>
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