[vtkusers] Minimum distance between two vtkPolyData objects?

[Bill Lorensen]

 vtkDistancePolyDataFilter
// Computes the signed distance from one vtkPolyData to another. The

// signed distance to the second input is computed at every point in

// the first input using vtkImplicitPolyDataDistance. Optionally, the
signed
// distance to the first input at every point in the second input can

// be computed. This may be enabled by calling

// ComputeSecondDistanceOn().


On Thu, Apr 11, 2013 at 6:15 PM, jozzas <jozzas at hotmail.com> wrote:

> 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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