[vtkusers] implicitmodeller - negative distance inside object

[Arturo Caissut]

Hi,
I had a similar need some time ago during a project developed with a 
teacher of mine, and we created a "custom" Implicit Modeller class. 
Maybe it could be a good starting point for you: the main (only?) 
difference with vtkImplicitModeller is that into the class a "IN/OUT" 
check is performed, so that internal points are considered to have 
positive distance while external points have a negative one.
It was originally intended as a quick "filling" filter for a 3D surface 
polydata, setting a high enough distance value, it generates a full volume.
Hope it'll help you.

Regards,
Arturo



Rashindra Manniesing ha scritto:
>
>  
>
> I am new to VTK so please forgive if the following question has a 
> trivial answer.
>
>  
>
> I am using ImplicitModeller to get from a PolyData object to a 
> distance map, and I was wondering whether it is possible to specify an 
> inside and outside of the polydata object, such that the distances 
> inside has different sign than the distances outside ?
>
>  
>
> Best regards,
>
> Rashindra Manniesing
>
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