[vtkusers] Cell locator : find closest point computation details

[Jean-Michel Lucas]

Thank you for your answer David, I'll try and have a look at the code.

Jean-Michel

 

De : David Gobbi [mailto:david.gobbi at gmail.com] 
Envoyé : mardi 23 février 2016 18:47
À : Jean-Michel Lucas
Cc : VTK Users
Objet : Re: [vtkusers] Cell locator : find closest point computation details

 

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

 

 

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