[vtkusers] clipping plane struggling problem

[Bill Chivas]

Maybe i could use vtkExtractGeometry combined with vtkImplicitFunction. But i don't know how to use the latter to create an Implicit Function for my purpose. So far i have a property for every cell in the grid with its centroid value. But i cannot make it as an implicit function..









Hello all,

i want to use a clipping plane and i found that vtkImplicitPlaneWidget or vtkImplicitPlaneWidge2 should do the job.
The problem is that i want the clipping NOT like vtkClipPolyData which "cuts" through the cells of the dataset but like vtkExtractGeometry, which pulls out entire, uncut cells.
I tried in Paraview pipeline with Source-->Clip-->Extract cells by region which works in some way. What i want is to define whether the centroid (known) of a cell lies in so if it is in the "cut side" of the plane it is pulled out entire. Otherwise, it is not.
A second question does anyone know if the "Extract cells by region" function of Paraview is the  vtkExtractGeometry class?

A Paraview screenshot: on the left is cut, on the right cells are pulled out entirely
http://yfrog.com/74cutorpulledoutentirelyj

  		 	   		  

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