[vtkusers] how to implement selection of cells along a line (like autocad's fence)

[Bill Lorensen]

David,

In theory the vtkOBBTree::IntersectWithLine should do the job, but since
that method has 0 test coverage and my preliminary testing indicates it
only returns the first intersection.

More investigation is required.

Bill



On Fri, Apr 5, 2013 at 2:54 PM, David Gobbi <david.gobbi at gmail.com> wrote:

> Hi Andreas,
>
> Look at vtkOBBTree.  It has a method called InstersectWithLine that
> can return the Ids of all of the cells that are intersected by a line.
>
>  - David
>
> On Fri, Apr 5, 2013 at 12:07 PM, Andreas Buykx <A.Buykx at tnodiana.com>
> wrote:
> > Hi all,
> >
> >
> >
> > I’m looking for a way to extract cells from an unstructured grid by a
> > polyline selection, similar to what vtkImplicitSelectionLoop does for a
> > closed polygon. Is this something that can be implemented efficiently
> with
> > algorithms from VTK or should I write a custom algorithm?
> >
> >
> >
> > Thanks,
> >
> > Andreas Buykx
> >
> > Senior Software Engineer
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