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

[Bill Lorensen]

I'm sorry. I should have said I have low confidence that
vtkOBBTree::IntersectWithLine will work. If it does not, it is a bug.

Bill


On Fri, Apr 5, 2013 at 4:39 PM, Bill Lorensen <bill.lorensen at gmail.com>wrote:

> 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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