On Tuesday 12 July 2011 10:14 PM, pellegrini wrote:
> def pickupatoms(self):
> e = tvtk.ExtractSelectedFrustum()
> e.set_input(0, pts.mlab_source.dataset)
> e.frustum = scene.interactor.picker.frustum
> o = e.get_output(0)
> print o.points
>
> as far as I understood 'o.points' should return the points inside my
> selected area. However, it is always equal to None.
> By the way is pts.mlab_source.dataset an object of type 'vtkDataObject'
> ? I ask this question because in the only example
> of ExtractSelectedFrustum I could find on the web, the guys were using
Yes, it is, try this::
pts.mlab_source.dataset.is_a('vtkDataObject')
> 'scene.engine.scenes[0].children[0].data' as an input for the set_input
> method. What would be the equivalent
> in my case ?
You might what to do ::
e.update()
before you get the output, to see if that helps.
cheers,
prabhu
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