FOSDEM 2020 anyone?

[carlopav]

Yup. I'm not coming, but if there will be someway to do something for non attenders, i'll be glad to participate.

[saso]

https://opencollective.com/open-source- ... 0-96f78c6c

On Saturday, February 1 we’ll be organizing ‘Speed Dating’ sessions with Open Source Experts. Share your project, get feedback and advice from established leaders in the field, and have the chance to win $10,000 USD seed awards from open source funders.

[JulianTodd]

Just as an update, I'll be staying at same place as @sliptonic at the following hostel from Thursday 30/1 to Sunday 2/2.
https://www.meininger-hotels.com/en/hot ... ty-center/


My main objective is to find a proper home for my laserplacer application I wrote in Javascript and is still being used by a sailmaker to draw and cut out his sails on a 15m long laser cutter.
https://goatchurch.bitbucket.io/laserplacer.html

His work-flow depends on the following tool-chain that is theoretically available in FreeCAD but is not good enough at the moment to use: (1) DXF loading, (2) Area grouping (cuts and pen marks), (3) Nesting, (4) G-code/plotter code output.

I'd like to make contributions into each of these components, starting with the DXF loading.

Last time I looked at this I found a "legacy" Python DXF importer and an unfinished C++ DXF importer that was being developed under the assumption that the Python code was too slow. For example, when I tried out a 700kB DXF file from the sailmaker the Python code took 4 minutes to load, but the C++ version took only 8 seconds (but it ignored splines so was incomplete).

Then I made my own Python macro based it on the external library ezdxf, and it took about 16 seconds to load, including getting the colours and layers right:
https://github.com/goatchurchprime/tran ... rs.FCMacro

This seems conclusive. However, I remembered Yorik's challenge about the C++ importer being able to painlessly swallow 50Mb DXF files: https://forum.freecadweb.org/viewtopic. ... 93#p271139

The only 50Mb DXF file I could find is one here made of triangular facets:
http://cadkit.blogspot.com/p/sample-dxf-files.html

Because it's 3D and I don't know which mesh surface to use, I've loaded this example outside of FreeCAD on this notebook:
https://github.com/goatchurchprime/tran ... 50Mb.ipynb

Complete parsing the 50Mb file with ezdxf takes 35 seconds, and converting the points into a mesh takes 12 seconds. All pure un-optimized Python. The right algorithm eats raw code speed for breakfast.

If this goes well, the next chapter is to look again at the area-grouping in Sketcher, and whether we can pick out the regions that are extruded like you can in other CAD packages.

[yorik]

Good news, we will have an informal FreeCAD event at Brussels Hackerspace (close to BruxellesMidi train/metro station - see map) on thursday january 30th, around 18:00h. At least me and sliptonic will be there.. Join us if you are around!

[toralf]

Great.

I decided to stay home for that weekend. I assume the benefit of travel to Brussels does not outweigh the burden for me. Sorry. Good luck and have fun.

[DeepSOIC]

I'm afraid I'm not coming too. I was still undecided if I go or don't, leaning to "don't" side, and now I'm pretty certain.

[sliptonic]

I'm afraid I'm not coming too. I was still undecided if I go or don't, leaning to "don't" side, and now I'm pretty certain.

Sorry to hear that. The forums, gitter, and IRC are great for day-to-day communication but there are some conversations that are just too difficult to pull off online. I'm looking forward to meeting people face to face for a change.

[keithsloan52]

Will any of the sessions be video'ed? Or broadcast?

[shiftee]

Most of the FOSDEM talks will be live streamed and should appear in/around this page: https://fosdem.org/2020/schedule/streaming

Looks like the FreeCAD talk will be in room H.2213

The recorded video will be available a few weeks later

[carlopav]

I guess this is the link for the talk streamed at 11:20. Good luck guys!
https://live.fosdem.org/watch/h2213