[vtkusers] recent vtkClipDataSet can give non-tets?

[Adrian Umpleby]

Hi all,

I've been using vtkClipDataSet with version 4.2 of vtk to cut off a 
hexahedral mesh at a scalar value of zero. This gives all tets (though 
some of them are very thin slivers on the cut surface, which I have to 
deal with before continuing), just as the (latest) documentation says:

"vtkClipDataSet will triangulate all types of 3D cells (i.e., create 
tetrahedra). This is true even if the cell is not actually cut. This is 
necessary to preserve compatibility across face neighbors..."


However, I've recently been using it on some upgraded Linux boxes which 
have version 4.4 of vtk, and now I find a whole load of wedges coming 
out of vtkClipDataSet!

Is this the way vtkClipDataSet is supposed to behave now? Is there a 
way to choose to switch it back to tets? (Couldn't see anything in 
member list.)

Thanks,

Adrian