[Imstk-developers] Line mesh connectivity

[Hong Li]

Hi Alexis,
The connectivity info of linemesh was used for collision detection and
handing in PBD, for Line-Line collision pairs.

On Fri, Oct 27, 2017 at 10:43 AM Alexis Girault <alexis.girault at kitware.com>
wrote:

> I don't think we have ever used the line mesh class here (correct me if
> I'm wrong Sreekanth). I think Hong wrote this.
>
> @Hong: would you know if you were not using the connectivity information?
> @Nick: whichever way, it seems we should just try to properly use it.
>
> Alexis Girault
> R&D Engineer in Medical Computing
> Kitware, Inc.
>
> http://www.kitware.com
> (919) 969-6990 x325
>
> On Fri, Oct 27, 2017 at 10:17 AM, Milef, Nicholas Boris <milefn at rpi.edu>
> wrote:
>
>> Right now, the LineMeshRenderDelegate behaves differently than the
>> LineMesh geometry class implies. You can build a line mesh without
>> connectivity information, and it still displays a valid line mesh.
>> Meanwhile, the connectivity information seems to have no effect on the
>> visual mesh itself.
>> ------------------------------
>> *From:* Alexis Girault [alexis.girault at kitware.com]
>> *Sent:* Thursday, October 26, 2017 9:23 AM
>> *To:* Sreekanth Arikatla
>> *Cc:* Milef, Nicholas Boris; imstk-developers at imstk.org
>> *Subject:* Re: [Imstk-developers] Line mesh connectivity
>>
>> LineSource is a filter that uses two points to create a PolyLine.
>> PolyLine is a 1D cell. If the filter does not do enough and you need to
>> create a PolyLine that goes through multiple points, you might have to
>> create your own filter (just a callback really) to update a PolyLine when
>> you add points
>>
>> On Thu, Oct 26, 2017, 09:19 Sreekanth Arikatla <
>> sreekanth.arikatla at kitware.com> wrote:
>>
>>> vtkLineSource is being used inside the render delegate but I believe the
>>> right one is vtkPolyLine which is meant for a line passing through a bunch
>>> of points in the given order like in this example
>>> <https://www.vtk.org/Wiki/VTK/Examples/Cxx/GeometricObjects/PolyLine>.
>>>
>>> On Wed, Oct 25, 2017 at 5:23 PM, Milef, Nicholas Boris <milefn at rpi.edu>
>>> wrote:
>>>
>>>> Is the line mesh connectivity used for anything? I'm looking in the
>>>> line mesh render delegate for VTK, and the connectivity info doesn't appear
>>>> to be used anywhere.
>>>>
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>>>>
>>>>
>>>
>>>
>>> --
>>> Sreekanth Arikatla, Ph.D.,
>>> Senior R&D Engineer,
>>> Kitware, Inc. <http://www.kitware.com>, Carrboro, NC.
>>>
>>> _______________________________________________
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>>> Imstk-developers at imstk.org
>>> http://public.kitware.com/mailman/listinfo/imstk-developers
>>>
>>
>
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