Hello,
It’s been a while. I submitted the final proposal for gSoc on my idea
of point clouds with BRL-CAD. Since I started a bit late, I wasn’t able to
submit a draft proposal and get it reviewed. Nevertheless, I will try to submit
a patch based on integration with PCL in the upcoming week.
Warm regards,
Abhishek
> On Mar 12, 2018, at 2:27 PM, Christopher Sean Morrison <brl...@mac.com
> <mailto:brl...@mac.com>> wrote:
>
> Abhishek,
>
> To expand on that, BRL-CAD’s point cloud primitive was implemented years ago
> for a specific short-term need (a relatively straight-forward scanned point
> visualization). The pnts primitive was added with some structure flexibility
> and input methods but never taken to general feature and isn’t considered a
> published feature (which means it can change as needed).
>
> Design-wise, in my view it’s one of the few entities in BRL-CAD that can
> validly be solid or non-solid, intentionally supporting points with or
> without volume. The on-disk definition was also set up to support per-point
> orientation (e.g., surface normals) and color, data typically available from
> scanners. And that’s about where things were left, but the possibilities are
> wide open.
>
> Integrating with PCL would be good with an appropriate plan — especially if
> it helps get to production-quality capability being able to import, display,
> and render massive point clouds with/without colors, radii, and orientation.
> From there, one of the more useful things to explore would be Smooth Signed
> Distance (SSD) surface reconstruction. That could provide a robust path for
> fixing broken mesh geometries.
>
> Cheers!
> Sean
>
>
>
>
>> On Mar 11, 2018, at 9:22 PM, Abhishek Vasudevan <abhishek.open...@gmail.com
>> <mailto:abhishek.open...@gmail.com>> wrote:
>>
>> Hi Daniel,
>> I was thinking maybe I could integrate the pnts primitive with
>> the PCL library to help with the visualization part. I believe a lot of
>> point cloud functionalities (Segmentation, filters) can be added easily if
>> we were to use PCL. Also, there can be options to open and operate on all
>> formats of point cloud files like PCD, PLY ,etc.
>>
>> Can you provide me the code/documentation that BRL-CAD uses for the pnts
>> primitive? Also, what do you think about using PCL here?
>>
>> Regards,
>> Abhishek
>>
>>
>>> On Mar 11, 2018, at 1:10 AM, Daniel Roßberg <danielmrossb...@gmail.com
>>> <mailto:danielmrossb...@gmail.com>> wrote:
>>>
>>> Hi Abhishek,
>>>
>>> I'm sure there are many ways you can contribute here.
>>> I've just looked for the first time at our pnts primitive (beside a small
>>> fix for a compiler I made there 9 years ago). I think this was meant with
>>> "BRL-CAD has a basic point cloud primitive." And as far as I can see, it
>>> has no real functionality yet. Especially, the pnts primitive doesn't
>>> describe a 3D solid, which is a problem for a software designed to handle
>>> 3D solids. The pnts primitive sketches currently an idea of how a point
>>> cloud could be handled in BRL-CAD. E.g., it provides the necessary load
>>> and save functions and the hooks into the mged and archer GUIs. This
>>> should ease the implementation of the real 3D functionality because you
>>> don't need to struggle with this much any more.
>>>
>>> Therefore, if you have an idea of how to bring pnts to live you are
>>> welcome. Feel free to discuss it here. Point clouds are often the result
>>> from 3D scans and a matter of visualization which we want to have in
>>> BRL-CAD too.
>>>
>>> Regards,
>>> Daniel
>>>
>>> 2018-03-09 14:14 GMT+01:00 Abhishek Vasudevan <abhishek.open...@gmail.com
>>> <mailto:abhishek.open...@gmail.com>>:
>>> Hey guys,
>>> I am a final year undergrad student from India majoring in Information
>>> Technology. I am currently in Australia as a research student at the
>>> University of Melbourne as part of an exchange program. I am working on
>>> point clouds as part of my research here. I’ve learnt quite a lot about
>>> point clouds, their file formats (PLY, PCD, etc.) and also the Point Cloud
>>> Library (PCL).
>>>
>>> I’ve seen the GSoc ideas page and apparently BRL-CAD has a primitive
>>> implementation of point clouds. Is there any documentation on how to use
>>> this in BRL-CAD? Also, what ideas do you have mind in improving the
>>> performance of your point cloud model?
>>>
>>> I have programmed extensively in C,C++ and Python. Is there any way I can
>>> make a contribution here?
>>>
>>> Warm regards,
>>> Abhishek
>>>
>>>
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