[vtkusers] vtkBooleanPolyDataFilter?

[Cory Quammen]

You are correct in assuming that the filter requires overlap. It sounds
like you want a method that computes Boolean  operations on volume meshes.
I'm not aware of a filter that does that.

Cory
On Nov 18, 2015 4:33 AM, "mbcx9rb9" <richard.j.brown at live.co.uk> wrote:

> Hi all,
>
> I want to create a volume, which is a margin around a previously existing
> volume.
>
> I had initially thought to use vtkBooleanPolyDataFilter, except for two
> sphere sources with matching centres but differing radii,
> SetOperationToDifference returns nothing, but I was hoping that it would
> return a spherical shell.
>
> Looking at the example,
> Examples/Cxx/PolyData/BooleanOperationPolyDataFilter, I get the impression
> that there needs to be intersection between the two polydata, so I guess
> this method won't work for concentric objects.
>
> Can anyone suggest a way to create a polydata shell? At the moment, I will
> settle for methods that only work for vtkSphereSource, but in the future,
> I'll need to be able to extend this to more generic shapes.
>
> Thanks in advance for the help.
>
>
>
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