[vtkusers] vtk - PointInsideObject - is the problem is due to precision?

[Andrea Borsic]

Hi Chiranjib,

Have you tried reducing the spatial tolerance with the method 
SetTolerance() of vtkSelectEnclosedPoints() ?

I have experienced a similar situation, and setting an appropriate 
tolerance (e.g. a small fraction of the size of the object) solved the 
problem.

Cheers,

Andrea




On 1/20/2017 8:27 AM, Chiranjib Sur wrote:
> Hi All,
> I am trying to extend the example to find points inside an object 
> (http://www.vtk.org/Wiki/VTK/Examples/Cxx/PolyData/PointInsideObject 
> <http://www.vtk.org/Wiki/VTK/Examples/Cxx/PolyData/PointInsideObject>). 
> The idea is to fill a 3D volume with points inside it.
>
> While doing so, I am finding that for some points which are actually 
> outside the object are getting detected as inside.
> To picture on the left is my original object and on the right is the 
> object filled with points
>
> Inline image 1 Inline image 2
>
> You will find that few points which are actually outside are getting 
> detected as inside.
>
> Any idea what is happening? The object file and the source codes are 
> attached.
>
> Thanks,
> Chiranjib
>
>
>
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