[vtkusers] vtkImplicitDataSet

[David Szakovits]

Eventually I have two objects to be intersected using vtkImplicitBoolean 
(difference).  

As a first step I tried to convert an object to a function and back 
using this sequence

vtkPolyDataReader
vtkCleanPolyData
vtkWindowedSyncPolyDataFilter
vtkImplicitDataSet
vtkSampleFunction
vtkContourFilter
vtkPolyDataMapper

I do not see the object.  But with just

vtkPolyDataReader
vtkCleanPolyData
vtkWindowedSyncPolyDataFilter
vtkPolyDataMapper

I see the object.

Has any user had success with vtkImplicitDataSet with PolyData?
Is  there another or better approach for "subtracting" two PolyData objects?

DJS