[Imstk-developers] Line mesh connectivity

Fri Oct 27 12:18:11 EDT 2017

Ok, I'll have an MR in a few hours for this. It'll work with the load factor as well and have options for colored lines.

@Alexis, I think I caused some confusion. I misinterpreted your @Nick a few messages back to being a quote I made for some reason.
________________________________
From: Sreekanth Arikatla [sreekanth.arikatla at kitware.com]
Sent: Friday, October 27, 2017 11:50 AM
To: Milef, Nicholas Boris
Cc: Alexis Girault; Hong Li; imstk-developers at imstk.org
Subject: Re: [Imstk-developers] Line mesh connectivity

Yes its made of lines.

On Fri, Oct 27, 2017 at 11:46 AM, Milef, Nicholas Boris <milefn at rpi.edu<mailto:milefn at rpi.edu>> wrote:
Is the polydata made up of lines? Or is it wireframe triangles?
________________________________
From: Sreekanth Arikatla [sreekanth.arikatla at kitware.com<mailto:sreekanth.arikatla at kitware.com>]
Sent: Friday, October 27, 2017 11:12 AM
To: Milef, Nicholas Boris
Cc: Alexis Girault; Hong Li; imstk-developers at imstk.org<mailto:imstk-developers at imstk.org>

Subject: Re: [Imstk-developers] Line mesh connectivity

In cameraNavigation we don't use the line mesh from imstk but rather directly use vtk polydata.

On Fri, Oct 27, 2017 at 10:49 AM, Milef, Nicholas Boris <milefn at rpi.edu<mailto:milefn at rpi.edu>> wrote:
I'm talking about the line mesh, not the wireframe. I think you use it for camera nav to visualize the path (at least from the video), but I might be wrong.
________________________________
From: Alexis Girault [alexis.girault at kitware.com<mailto:alexis.girault at kitware.com>]
Sent: Friday, October 27, 2017 10:48 AM
To: Sreekanth Arikatla
Cc: Milef, Nicholas Boris; Hong Li; imstk-developers at imstk.org<mailto:imstk-developers at imstk.org>

Subject: Re: [Imstk-developers] Line mesh connectivity

Nick: are you talking about surface mesh with wireframe representation? Because that is different from Line mesh.

Alexis Girault
R&D Engineer in Medical Computing
Kitware, Inc.

http://www.kitware.com<http://www.kitware.com/>
(919) 969-6990 x325<tel:(919)+969-6990+x325>

On Fri, Oct 27, 2017 at 10:46 AM, Sreekanth Arikatla <sreekanth.arikatla at kitware.com<mailto:sreekanth.arikatla at kitware.com>> wrote:
We have never used the line mesh but would need it though. It makes sense to fix it to use the connectivity information.

On Fri, Oct 27, 2017 at 10:43 AM, Alexis Girault <alexis.girault at kitware.com<mailto: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<http://www.kitware.com/>
(919) 969-6990 x325<tel:(919)+969-6990+x325>

On Fri, Oct 27, 2017 at 10:17 AM, Milef, Nicholas Boris <milefn at rpi.edu<mailto: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<mailto: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<mailto: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<mailto: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<mailto: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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--
Sreekanth Arikatla, Ph.D.,
Senior R&D Engineer,
Kitware, Inc.<http://www.kitware.com>, Carrboro, NC.

--
Sreekanth Arikatla, Ph.D.,
Senior R&D Engineer,
Kitware, Inc.<http://www.kitware.com>, Carrboro, NC.

--
Sreekanth Arikatla, Ph.D.,
Senior R&D Engineer,
Kitware, Inc.<http://www.kitware.com>, Carrboro, NC.

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