[vtkusers] Cell locator : find closest point computation details

[David Gobbi]

Hi Jean-Michel,

I don't think that the locator uses "cell center" for any of its
computations.  Your best resource is the code itself. Take a look at the
code to see how vtkCellLocator::FindCell() is implemented.

 - David


On Tue, Feb 23, 2016 at 10:27 AM, Jean-Michel Lucas <jm.lucas at gantha.com>
wrote:

> Thank you for your answer David.
>
> I referred to neighbour cells because I wanted to know how the closest
> cell is identified (I assumed it was based on the distance).
>
> My problem is to know, given a point that is in a large cell but actually
> closer to the center of a neighbour smaller cell, which of the two is
> identified as the closest cell.
>
>
>
> Jean-Michel
>
>
>
> *De :* David Gobbi [mailto:david.gobbi at gmail.com]
> *Envoyé :* vendredi 19 février 2016 21:01
> *À :* Jean-Michel Lucas
> *Cc :* VTK Users
> *Objet :* Re: [vtkusers] Cell locator : find closest point computation
> details
>
>
>
> On Fri, Feb 19, 2016 at 10:05 AM, Jean-Michel Lucas <jm.lucas at gantha.com>
> wrote:
>
> Dear all,
>
>
>
> Could someone explain me how the vtkCellLocator::FindClosestPoint method
> works ? More specifically I would like to know how the distance is computed
> from a given point: is it measured with respect to the center of the
> neighbour cells ?
>
>
>
> If used on vtkPolyData, it gives the perpendicular distance to the closest
> surface.  I'm pretty sure that the neighbour cells are not part the
> computation.
>
>
>
>  - David
>
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://public.kitware.com/pipermail/vtkusers/attachments/20160223/40d93ed8/attachment.html>