Hello everybody,
I would like to pickup some points within a scene using a rectangle area.
To do so, I tried something that looks like:
pts = scene.mlab.quiver3d(x, y, z, s, s, s, figure = scene.mayavi_scene)
scene.interactor.interactor_style = tvtk.InteractorStyleRubberBandPick()
scene.interactor.picker = tvtk.AreaPicker()
scene.interactor.picker.add_observer('EndPickEvent', self.pickupatoms)
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
'scene.engine.scenes[0].children[0].data' as an input for the set_input method.
What would be the equivalent
in my case ?
thanks a lot
Eric
--
Eric Pellegrini
Calcul Scientifique
Institut Laue-Langevin
Grenoble, France
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