OpenNL (Open Numerical Library) is a library for solving sparse linear systems, especially designed for the Computer Graphics community. The goal for OpenNL is to be as small as possible, while offering the subset of functionalities required by this application field. The Makefiles of OpenNL can generate a single .c + .h file, very easy to integrate in other projects. The distribution includes an implementation of our Least Squares Conformal Maps parameterization method.

New version: OpenNL 3.2.1, includes support for CUDA and Fermi architecture (Concurrent Number Cruncher and Nathan Bell's ELL formats)

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OpenNL offers the following set of functionalities:

• Efficient sparse matrix data structure (for non-symmetric and symmetric matrices)
• Iterative builder for sparse linear system
• Iterative builder for sparse least-squares problems
• Iterative solvers: conjugate gradient, BICGStab, GMRES
• Preconditionners: Jacobi, SSOR
• Iterative solver on the GPU (Concurrent Number Cruncher and Nathan Bell's ELL)
• Sparse direct solvers: OpenNL can be linked with SuperLU
• Simple demo program with LSCM (Least Squares Conformal Maps)

The CGAL Planar Parameterization package is a software library that implements several types of mesh parameterization methods. This package is now part of the standard CGAL distribution, that can be downloaded from the CGAL website . The documentation of the package (written by Laurent Saboret) can be obtained from this webpage. The CGAL Planar Parameterization package was developed in the frame of a cooperation with the Geometrica project-team (with Laurent Saboret, Pierre Alliez and Bruno Lévy).