Conditions of Use

Copying Conditions

Neper is free software; this means that everyone is free to use it and to redistribute it on a free basis. Neper is not in the public domain; it is copyrighted and there are restrictions on its distribution, but these restrictions are designed to permit everything that a good cooperating citizen would want to do. What is not allowed is to try to prevent others from further sharing any version of Neper that they might get from you.

Specifically, we want to make sure that you have the right to give away copies of Neper, that you receive source code or else can get it if you want it, that you can change Neper or use pieces of Neper in new free programs, and that you know you can do these things.

To make sure that everyone has such rights, we have to forbid you to deprive anyone else of these rights. For example, if you distribute copies of Neper, you must give the recipients all the rights that you have. You must make sure that they, too, receive or can get the source code. And you must tell them their rights.

Also, for our own protection, we must make certain that everyone finds out that there is no warranty for Neper. If Neper is modified by someone else and passed on, we want their recipients to know that what they have is not what we distributed, so that any problems introduced by others will not reflect on our reputation.

The precise conditions of the license for Neper are found in the General Public License that accompanies the source code (GNU General Public License). Further information about this license is available from the GNU Project webpage (GNU General Public License FAQ).

User Guidelines

If you use Neper for your own work, please, mention it explicitly in your reports (papers, books, talks, …) and cite one or several of the following papers, depending of your use of Neper:

  • R. Quey, P.R. Dawson, F. Barbe. Large-scale 3D random polycrystals for the finite element method: Generation, meshing and remeshing. Comput. Methods Appl. Mech. Engrg., vol. 200, pp. 1729–1745, 2011, for Voronoi tessellation, regularization, meshing;

  • R. Quey and L. Renversade, Optimal polyhedral description of 3D polycrystals: Method and application to statistical and synchrotron X-ray diffraction data, Comput. Methods Appl. Mech. Engrg., vol. 330, pp. 308-333, 2018 for tessellation from custom or experimental properties with option -morpho;

  • R. Quey, A. Villani and C. Maurice, Nearly uniform sampling of crystal orientations, J. Appl. Crystallogr., vol. 51, pp. 1162-1173, 2018, for uniform crystal orientation distribution with option -ori uniform.