[vtkusers] Minimum distance between two vtkPolyData objects?

[jozzas]

Hi, I'm trying to determine the minimum distance between two vtkPolyData
objects (assume two simple cubes for now). There are algorithms like GJK
that do this, and I was hoping that something like this already exists in
VTK, but I can't seem to find anything. Note that I'm not interested in 
collision detection - just determining the distance between vtkPolyData 
objects.

I've tried using vtkDistancePolyDataFilter, but this appears to calculate
the distances between pairs of vertices, and so does not actually calculate
the true minimum distance in all cases. It can be quite inaccurate if, for
example, the closest distance vector between two objects intersects an
edge or face of one or both of them.

Can anyone point to something in VTK that can do this, or will I be forced
to implement some form of GJK-like algorithm myself?

Cheers,

John



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