[vtkusers] Problems using vtkGenericClip

[Luca Penasa]

Hi everybody... I need some help...

I have an unstructured grid called 'grid' and i want to extract some
points using the vtkGenericClip function. As clip fuction i used a
vtkSphere object... this is the code i wrote:

	sphere = vtkSphere()
        sphere.SetCenter(x_coord, y_coord, z_coord)
        sphere.SetRadius(radius)
        
        cutter = vtkGenericClip()
        cutter.SetClipFunction(sphere)
        cutter.SetInsideOut(0)
        cutter.SetInput(grid)
        cutter.Update()
        
        smallgrid = cutter.GetOutput()
        smallgrid.Update()

	
after that 'cutter.GetNumberOfPoints()' always gives me 0 as result!!
i cannot understend why...
coordinates and radius of sphere are correctly set...
'smallgrid' object is an unstructured grid object as expected...


thank you!!



-- 
---------------------------
Luca Penasa
Student at Geosciences Dpt.
University of Padua (IT)
luca.penasa at email.it
---------------------------

 
 
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