bradb edited this page Jan 19, 2016 · 14 revisions
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Qhull 2015.2 is available on github and www.qhull.org

Qhull 2015.2 fixes memory leaks reported by Marcos Sandim, the Cmake build reported by Niclas Rosenvik, and the DevStudio 2012 build. It fixes the return type of QhullLinkedList::last() and back(), and includes as requested by Ben Boeckel.

Qhull 2015.1 is the first release of Qhull's reentrant library, libqhull_r. If you call Qhull from a program, you should use libqhull_r instead of libqhull or libqhullp. The C++ interface uses libqhull_r.

libqhull_r does not use global variables. Instead, a qhT pointer is the first argument to each procedure. This approach was pioneered by Pete Klosterman in 2010.

Qhull 2015.1 fixes error QH6228 "all neighbors ... are flipped or upper Delaunay". This error occurred rarely with nine reports. J. Metz provided input that triggered this error.

Qhull 2015.1 includes rbox option 'Cn,r,m' to generate nearly coincident points. This is a newly understood, bad case for Qhull. It will be fixed in a later version of Qhull by merging facets before adding a new point. A bounding box for Delaunay triangulations and Voronoi diagrams may alleviate the problem. For more information, see "Nearly coincident points on an edge" in Nearly coincident points on an edge.

Version 2015.0.7 cleans up Qhull's collection classes and iterators, with thanks to Filip Jares for reporting these problems.

Version 2015.0.6 makes it easier to remove references to exit(), stderr, and stdout from libqhull, libqhull_r, and libqhullcpp. By redefining usermem_r.c, all references are removed except for two instances of stderr (to initialize a null FILE* parameter) [D. Sterratt].

Version 2015.0.1 increased the maximum vertex ID and ridge ID from 16M to 4G [H. Strandenes, C. Cantwell]

Comments, errors, suggestions are welcome.