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NelleVNelleV
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Merge pull request #7747 from ianthomas23/update_qhull_2015.2
Update qhull to 2015.2
2 parents b1f4820 + 9a658c0 commit 3290d19

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‎doc/api/api_changes/2017-01-06-IT.rst

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Updated qhull to 2015.2
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```````````````````````
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The version of qhull shipped with Matplotlib, which is used for
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Delaunay triangulation, has been updated from version 2012.1 to
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2015.2.

‎extern/qhull/COPYING.txt renamed to ‎extern/libqhull/COPYING.txt

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Qhull, Copyright (c) 1993-2012
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Qhull, Copyright (c) 1993-2015
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C.B. Barber
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Arlington, MA
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Arlington, MA
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and
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The National Science and Technology Research Center for
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email: [email protected]
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This software includes Qhull from C.B. Barber and The Geometry Center.
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Qhull is copyrighted as noted above. Qhull is free software and may
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be obtained via http from www.qhull.org. It may be freely copied, modified,
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This software includes Qhull from C.B. Barber and The Geometry Center.
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Qhull is copyrighted as noted above. Qhull is free software and may
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be obtained via http from www.qhull.org. It may be freely copied, modified,
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and redistributed under the following conditions:
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1. All copyright notices must remain intact in all files.
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2. A copy of this text file must be distributed along with any copies
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of Qhull that you redistribute; this includes copies that you have
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modified, or copies of programs or other software products that
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2. A copy of this text file must be distributed along with any copies
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of Qhull that you redistribute; this includes copies that you have
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modified, or copies of programs or other software products that
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include Qhull.
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3. If you modify Qhull, you must include a notice giving the
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name of the person performing the modification, the date of
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modification, and the reason for such modification.
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4. When distributing modified versions of Qhull, or other software
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products that include Qhull, you must provide notice that the original
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4. When distributing modified versions of Qhull, or other software
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products that include Qhull, you must provide notice that the original
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source code may be obtained as noted above.
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5. There is no warranty or other guarantee of fitness for Qhull, it is
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provided solely "as is". Bug reports or fixes may be sent to
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[email protected]; the authors may or may not act on them as
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5. There is no warranty or other guarantee of fitness for Qhull, it is
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provided solely "as is". Bug reports or fixes may be sent to
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[email protected]; the authors may or may not act on them as
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they desire.

‎extern/qhull/geom.c renamed to ‎extern/libqhull/geom.c

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see qh-geom.htm and geom.h
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Copyright (c) 1993-2012 The Geometry Center.
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$Id: //main/2011/qhull/src/libqhull/geom.c#3 $$Change: 1464 $
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$DateTime: 2012/01/25 22:58:41 $$Author: bbarber $
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Copyright (c) 1993-2015 The Geometry Center.
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$Id: //main/2015/qhull/src/libqhull/geom.c#2 $$Change: 1995 $
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$DateTime: 2015/10/13 21:59:42 $$Author: bbarber $
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infrequent code goes into geom2.c
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*/
@@ -465,7 +465,7 @@ facetT *qh_findbestnew(pointT *point, facetT *startfacet,
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} /* end of !flipped */
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} /* FORALLfacet from startfacet or qh newfacet_list */
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}
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if (testhorizon || !bestfacet)
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if (testhorizon || !bestfacet) /* testhorizon is always True. Keep the same code as qh_findbest */
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bestfacet= qh_findbesthorizon(!qh_IScheckmax, point, bestfacet ? bestfacet : startfacet,
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!qh_NOupper, &bestdist, numpart);
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*dist= bestdist;
@@ -502,7 +502,7 @@ facetT *qh_findbestnew(pointT *point, facetT *startfacet,
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notes:
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assumes numrow == numcol-1
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see Golub & van Loan 4.4-9 for back substitution
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see Golub & van Loan, 1983, Eq. 4.4-9 for "Gaussian elimination with complete pivoting"
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solves Ux=b where Ax=b and PA=LU
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b= [0,...,0,sign or 0] (sign is either -1 or +1)
@@ -682,7 +682,7 @@ pointT *qh_getcenter(setT *vertices) {
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*coord= 0.0;
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FOREACHvertex_(vertices)
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*coord += vertex->point[k];
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*coord /= count;
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*coord /= count; /* count>=2 by QH6003 */
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}
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return(center);
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} /* getcenter */
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if nearzero
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sets norm to direction of maximum value
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*/
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void qh_normalize2 (coordT *normal, int dim, boolT toporient,
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void qh_normalize2(coordT *normal, int dim, boolT toporient,
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realT *minnorm, boolT *ismin) {
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int k;
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realT *colp, *maxp, norm= 0, temp, *norm1, *norm2, *norm3;
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pointT *newpoint, *np, *normal;
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int normsize= qh normal_size;
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int k;
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void **freelistp; /* used !qh_NOmem */
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void **freelistp; /* used if !qh_NOmem by qh_memalloc_() */
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qh_memalloc_(normsize, freelistp, newpoint, pointT);
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np= newpoint;
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int normsize= qh normal_size;
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int k,i, oldtrace= 0;
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realT dist;
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void **freelistp; /* used !qh_NOmem */
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void **freelistp; /* used if !qh_NOmem by qh_memalloc_() */
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coordT *coord, *gmcoord;
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pointT *point0= SETfirstt_(facet->vertices, vertexT)->point;
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boolT nearzero= False;
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if (dim == 2) {
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normal[0]= dY(1,0);
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normal[1]= dX(0,1);
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qh_normalize2 (normal, dim, toporient, NULL, NULL);
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qh_normalize2(normal, dim, toporient, NULL, NULL);
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*offset= -(point0[0]*normal[0]+point0[1]*normal[1]);
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*nearzero= False; /* since nearzero norm => incident points */
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}else if (dim == 3) {
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dX(2,0), dZ(2,0));
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normal[2]= det2_(dX(2,0), dY(2,0),
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dX(1,0), dY(1,0));
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qh_normalize2 (normal, dim, toporient, NULL, NULL);
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qh_normalize2(normal, dim, toporient, NULL, NULL);
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*offset= -(point0[0]*normal[0] + point0[1]*normal[1]
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+ point0[2]*normal[2]);
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maxround= qh DISTround;
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normal[3]= det3_(dX(2,0), dY(2,0), dZ(2,0),
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dX(1,0), dY(1,0), dZ(1,0),
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dX(3,0), dY(3,0), dZ(3,0));
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qh_normalize2 (normal, dim, toporient, NULL, NULL);
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qh_normalize2(normal, dim, toporient, NULL, NULL);
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*offset= -(point0[0]*normal[0] + point0[1]*normal[1]
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+ point0[2]*normal[2] + point0[3]*normal[3]);
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maxround= qh DISTround;
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for (k=dim-1; k--; )
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*offset -= *pointcoord++ * *normalcoef++;
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} /* sethyperplane_gauss */
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‎extern/qhull/geom.h renamed to ‎extern/libqhull/geom.h

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see qh-geom.htm and geom.c
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Copyright (c) 1993-2012 The Geometry Center.
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$Id: //main/2011/qhull/src/libqhull/geom.h#3 $$Change: 1464 $
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$DateTime: 2012/01/25 22:58:41 $$Author: bbarber $
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Copyright (c) 1993-2015 The Geometry Center.
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$Id: //main/2015/qhull/src/libqhull/geom.h#1 $$Change: 1981 $
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$DateTime: 2015/09/28 20:26:32 $$Author: bbarber $
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#ifndef qhDEFgeom
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pointT *qh_getcentrum(facetT *facet);
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realT qh_getdistance(facetT *facet, facetT *neighbor, realT *mindist, realT *maxdist);
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void qh_normalize(coordT *normal, int dim, boolT toporient);
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void qh_normalize2 (coordT *normal, int dim, boolT toporient,
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void qh_normalize2(coordT *normal, int dim, boolT toporient,
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realT *minnorm, boolT *ismin);
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pointT *qh_projectpoint(pointT *point, facetT *facet, realT dist);
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pointT *qh_voronoi_center(int dim, setT *points);
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#endif /* qhDEFgeom */
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