[vtkusers] vtkClipPolyData unexpected behaviour ?

[Seven Ph]

Hello all,

I am experimenting with vtkClipPolyData to clip some polydata with a implicit function. For example in this picture :http://img684.imageshack.us/img684/6236/clipping.png , The clip function is two vtkPlanes joined with a vtkImplicitBoolean. Until the two planes are distant enough, everything work as expected (see 1 and 2 on the picture). But when they are too close, i get some artefacts (3 and 4). The same thing happend with intersecting planes, near the intersections ( see http://img689.imageshack.us/img689/5623/boxclipcow.png , obtained with a vtkPlanes, from a vtkBoxWidget ). 

Is this the right behaviour ? Is there any way to obtain a clearly clipped polydata ?


The joined python script is derived from the clipcow vtk example and show this problem.  To enable vtkImplicitPlaneWidget instead of a vtkBowWidget (like in the first picture) set use_boxWidget to False

--
Nicolas



      
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