[vtkusers] Coincident topology questions

[Langer, Stephen A. (Fed)]

Hi --

How does one set the arguments to the various vtkMapper::SetRelativeCoincidentTopology methods?  I can't find an explanation for 'factor' and 'units'.

The attached screenshot shows a surface representation of a grid of rectangular voxels and a wire-frame grid of tetrahedra.  Four of the tetrahedral elements are also drawn with a surface representation in red and are supposed to obscure the voxels, but a mix of tex and voxel is drawn instead.  The surfaces of the voxels and the tetrahedral are coplanar.  They don't share nodes and edges, but the points on the x=0 face all have x=0 exactly.  Is the coincident topology resolution machinery expected to work in this case?   

I'm using vtk 8.1.0.

Thanks.
 
      -- Steve

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