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  • Brad Barber's avatar
    Qhull 2020.1 2020/05/29 (8.0.0) released · 4733a95b
    Brad Barber authored
    Qhull 2020.1 enhances the C++ interface with QhullUser and support for Voronoi diagrams.  See user_eg3
    for C++ examples.  Qhull builds support pkg-config, SONAME,
    DESTDIR for staged installs, PREFIX, QhullExport, and CMAKE_CURRENT_SOURCE_DIR.
    
    * QhullLinkedList::const_iterator fixed operator->().
    
    * RoadError::stringGlobalLog returns std::string instead of const char *
    
    * QhullUser is a user-modifiable interface to Qhull using a custom qh_fprintf.
    Option '[Ta](http://www.qhull.org/html/qh-optt.htm#Ta)' displays the message codes for Qhull output.
    qh_fprintf can trap these codes and transfer the data to QhullUser.
    
    * user_eg3 adds examples for convex hulls, Delaunay triangulations, and Voronoi diagrams.
    The examples can take their input from rbox or qhull.  'user_eg3 rbox' preserves the dimension for multiple options.
    
    * The new C++ methods are Qhull::isDelaunay, Qhull::prepareVoronoi,
    QhullFacet::visitId, QhullFacet::nextFacet2d, QhullFacet::setFacetT,
    QhullRidge::qh, QhullRidge::setRidgeT, and QhullVertex::setVertexT.
    
    * qh_order_vertexneighbors [io_r.c] orders facet neighbors of a vertex by 2-d (orientation), 3-d (adjacency), or n-d (f.visitid,id).
    
    * qh_nextfacet2d [poly2_r.c] returns 2-d facets and vertices in counter-clockwise order.
    
    * Qhull install adds pkg-config support via CMakeLists.txt and Makefile.  The template is qhull.pc.in.
    
    * CMakeLists.txt increases SOVERSION to 8.0.  Makefile reads SOVERSION from CMakeLists and creates a symbolic link for SONAME.  Qhull 2019.1 had ABI breakage that was not indicated by its SOVERSION 7.
    
    * CMakeLists.txt creates QhullExport/ for QhullConfig.  CMakeLists sets POSITION_INDEPENDENT_CODE for libqhullcpp.
    
    * Makefile supports GNU Makefile standards for DESTDIR and PREFIX.  Previous Qhull Makefiles used DESTDIR instead of PREFIX.
    
    * By default, Makefile compiles without -m32 and with -fpic.  Use variables M32 and FPIC for 32-bit builds without -fpic on 64-bit hosts.
    This reduces memory requirements and may be faster on older processors.
    
    * The -lm linker flag moved to the end of the linker command.
    4733a95b
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