We have met Jidong Zhao, the sudoDEM co-author, at the last yade
workshop. Perhaps we should ask him directly?

Bruno Chareyre said:     (by the date of Thu, 27 Feb 2020 15:52:08 +0100)

> Dear Shiewei,
> I was trying to use and to check something in the source code of sudoDEM3D
> today.
> However, I found that the program was distributed only in the form of
> binary code. Did I miss something?
> If not, could you please send me (or provide a link to download same
> versions of) the source codes that were used to generate the binary objects
> available as tarballs for sudoDEM3D at [1]
> <https://www.researchgate.net/profile/Shiwei_Zhao3/project/SudoDEM-a-discrete-element-code-for-non-spherical-particles/attachment/5d37fd89cfe4a7968db8a305/AS:784079259701258@1563950471928/download/SudoDEM3D-1.3.6.rc1.tar.xz?context=ProjectUpdatesLog>
> and for the third party libraries at [2]
> <https://zenodo.org/record/2683766#.XlfQl-F7nRZ>?
> I believe sudoDEM is a great achievement and I'm glad that yade was helpful
> for that work.
> I also think it is very important to comply to the terms and conditions of
> yade's license (GPL2), and I feel annoyed that sudoDEM apparently doesn't.
> In fact, it certainly also breaks the terms and conditions of some third
> party libraries.
> I'm reproducing below relevant subsets of yade's license (GPL2), they speak
> for themselves I think. Please note that mentioning GPL3 on your website is
> irrelevant since the GPL3 applies to a source code only, not to a binary
> code.
> Licensing questions are not always easy, if you are unsure what is
> permitted please contact yade-dev@lists.launchpad.net, we will do our best
> to advise.
> If you are "in the process of" making sources available, then maybe just
> don't distribute binaries meanwhile. In any case, make sure you can always
> provide the exact same sources you use for generating each *.so you
> distribute.
> The easiest (though not mandatory) way to do so, by far, is to
> systematically give links to both binaries and sources for each version. In
> any case, you must provide license in full, and a written notice on how to
> get source codes if you don't provide a link to it.
> Best Regards
> Bruno Chareyre
> ___
> Yade's license says:
> Yade's license says:
>   0.  "work based on the Program" means either the Program or any derivative 
> work
>   1. You may copy and distribute [...] provided that you
> conspicuously and appropriately publish on each copy an appropriate
> copyright notice
>   2. You may modify your copy [...] and distribute such modifications
> under the terms of Section 1 above, provided that you also meet all of these 
> conditions:
>     a) You must cause the modified files to carry prominent notices
>     stating that you changed the files and the date of any change.
>     b) You must cause any work that you distribute [...] to be licensed [...] 
> under the terms of this License.
>   3. You may copy and distribute the Program (or a work based on it,
> under Section 2) in object code or executable form under the terms of
> Sections 1 and 2 above provided that you also do one of the following:
>     a) Accompany it with the complete corresponding machine-readable
>     source code [...]
>     b) Accompany it with a written offer, valid for at least three
>     years, to give any third party [...] the corresponding source code
>   4. You may not [...] distribute the Program
> except as expressly provided under this License. Any attempt
> otherwise [...] will automatically terminate your rights
>   10. If [your] distribution conditions are different, write to the author
> to ask for permission.
> [1]
> https://www.researchgate.net/profile/Shiwei_Zhao3/project/SudoDEM-a-discrete-element-code-for-non-spherical-particles/attachment/5d37fd89cfe4a7968db8a305/AS:784079259701258@1563950471928/download/SudoDEM3D-1.3.6.rc1.tar.xz?context=ProjectUpdatesLog
> [2] https://zenodo.org/record/2683766#.XlfQl-F7nRZ
> -- 
> -- 
> _______________
> Bruno Chareyre
> Associate Professor
> ENSE³ - Grenoble INP
> Lab. 3SR
> BP 53
> 38041 Grenoble cedex 9
> Tél : +33 4 56 52 86 21
> ________________
> Email too brief?
> Here's why: email charter
> <https://marcuselliott.co.uk/wp-content/uploads/2017/04/emailCharter.jpg>

Janek Kozicki, PhD. DSc. Arch. Assoc. Prof.
Gdańsk University of Technology
Faculty of Applied Physics and Mathematics
Department of Theoretical Physics and Quantum Information
http://pg.edu.pl/jkozicki (click English flag on top right)

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