LR B-splines is a technology which enables users to perform local refinement on B-spline surfaces or volumes, which traditionally have been limited to tensor products. This has a wide variety of applications within computer-aided design (CAD) and computer-aided engineering (CAE). While this library was written with the latter in mind, it is also possible to take use of it in a design environment.

This is a research code which was written by researchers for researchers. It is provided as open source under GNU public license v3. We provide here two versions of the code. One full c++ library which may be compiled from source code, and a slightly slower (but more accessible) Matlab overlay of the same code. Note that the volumetric code is currently only available in the c++ libraries.

This code was written by Kjetil Andre Johannessen at the Norwegian University of Science and Technology (NTNU) in collaboration with Sintef Digital.