[vtkusers] Minimum distance between two vtkPolyData objects?

[jozzas]

Hey Bill,

My understanding is that vtkDistancePolyDataFilter computes the distance at
every point (vertex) in each vtkPolyData object passed to it.

If you imagine two narrow rectangular prisms, one rotated 90 degrees and
slightly above the other in Z, you can see that this algorithm doesn't
calculate the minimum distance between the convex sets defined by those
vtkPolyData instances, as calculating vertex-vertex distances is inaccurate.
The minimum distance between these objects intersects the faces which
overlap in XY, so any algorithm to determine the true minimum distance (like
GJK) will include edges, faces and vertices.



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