hpp-fcl: merge.h Source File

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 /*<html><pre>  -<a                             href="qh-merge.htm"
   >-------------------------------</a><a name="TOP">-</a>
  
    merge.h
    header file for merge.c
  
    see qh-merge.htm and merge.c
  
    Copyright (c) 1993-2015 C.B. Barber.
    $Id: //main/2015/qhull/src/libqhull/merge.h#1 $$Change: 1981 $
    $DateTime: 2015/09/28 20:26:32 $$Author: bbarber $
 */
  
 #ifndef qhDEFmerge
 #define qhDEFmerge 1
  
 #include "libqhull.h"
  
  
 /*============ -constants- ==============*/
  
 /*-<a                             href="qh-merge.htm#TOC"
   >--------------------------------</a><a name="qh_ANGLEredundant">-</a>
  
   qh_ANGLEredundant
     indicates redundant merge in mergeT->angle
 */
 #define qh_ANGLEredundant 6.0
  
 /*-<a                             href="qh-merge.htm#TOC"
   >--------------------------------</a><a name="qh_ANGLEdegen">-</a>
  
   qh_ANGLEdegen
     indicates degenerate facet in mergeT->angle
 */
 #define qh_ANGLEdegen     5.0
  
 /*-<a                             href="qh-merge.htm#TOC"
   >--------------------------------</a><a name="qh_ANGLEconcave">-</a>
  
   qh_ANGLEconcave
     offset to indicate concave facets in mergeT->angle
  
   notes:
     concave facets are assigned the range of [2,4] in mergeT->angle
     roundoff error may make the angle less than 2
 */
 #define qh_ANGLEconcave  1.5
  
 /*-<a                             href="qh-merge.htm#TOC"
   >--------------------------------</a><a name="MRG">-</a>
  
   MRG... (mergeType)
     indicates the type of a merge (mergeT->type)
 */
 typedef enum {  /* in sort order for facet_mergeset */
   MRGnone= 0,
   MRGcoplanar,          /* centrum coplanar */
   MRGanglecoplanar,     /* angle coplanar */
                         /* could detect half concave ridges */
   MRGconcave,           /* concave ridge */
   MRGflip,              /* flipped facet. facet1 == facet2 */
   MRGridge,             /* duplicate ridge (qh_MERGEridge) */
                         /* degen and redundant go onto degen_mergeset */
   MRGdegen,             /* degenerate facet (!enough neighbors) facet1 == facet2 */
   MRGredundant,         /* redundant facet (vertex subset) */
                         /* merge_degenredundant assumes degen < redundant */
   MRGmirror,            /* mirror facet from qh_triangulate */
   ENDmrg
 } mergeType;
  
 /*-<a                             href="qh-merge.htm#TOC"
   >--------------------------------</a><a name="qh_MERGEapex">-</a>
  
   qh_MERGEapex
     flag for qh_mergefacet() to indicate an apex merge
 */
 #define qh_MERGEapex     True
  
 /*============ -structures- ====================*/
  
 /*-<a                             href="qh-merge.htm#TOC"
   >--------------------------------</a><a name="mergeT">-</a>
  
   mergeT
     structure used to merge facets
 */
  
 typedef struct mergeT mergeT;
 struct mergeT {         /* initialize in qh_appendmergeset */
   realT   angle;        /* angle between normals of facet1 and facet2 */
   facetT *facet1;       /* will merge facet1 into facet2 */
   facetT *facet2;
   mergeType type;
 };
  
  
 /*=========== -macros- =========================*/
  
 /*-<a                             href="qh-merge.htm#TOC"
   >--------------------------------</a><a name="FOREACHmerge_">-</a>
  
   FOREACHmerge_( merges ) {...}
     assign 'merge' to each merge in merges
  
   notes:
     uses 'mergeT *merge, **mergep;'
     if qh_mergefacet(),
       restart since qh.facet_mergeset may change
     see <a href="qset.h#FOREACHsetelement_">FOREACHsetelement_</a>
 */
 #define FOREACHmerge_( merges ) FOREACHsetelement_(mergeT, merges, merge)
  
 /*============ prototypes in alphabetical order after pre/postmerge =======*/
  
 void    qh_premerge(vertexT *apex, realT maxcentrum, realT maxangle);
 void    qh_postmerge(const char *reason, realT maxcentrum, realT maxangle,
              boolT vneighbors);
 void    qh_all_merges(boolT othermerge, boolT vneighbors);
 void    qh_appendmergeset(facetT *facet, facetT *neighbor, mergeType mergetype, realT *angle);
 setT   *qh_basevertices( facetT *samecycle);
 void    qh_checkconnect(void /* qh.new_facets */);
 boolT   qh_checkzero(boolT testall);
 int     qh_compareangle(const void *p1, const void *p2);
 int     qh_comparemerge(const void *p1, const void *p2);
 int     qh_comparevisit(const void *p1, const void *p2);
 void    qh_copynonconvex(ridgeT *atridge);
 void    qh_degen_redundant_facet(facetT *facet);
 void    qh_degen_redundant_neighbors(facetT *facet, facetT *delfacet);
 vertexT *qh_find_newvertex(vertexT *oldvertex, setT *vertices, setT *ridges);
 void    qh_findbest_test(boolT testcentrum, facetT *facet, facetT *neighbor,
            facetT **bestfacet, realT *distp, realT *mindistp, realT *maxdistp);
 facetT *qh_findbestneighbor(facetT *facet, realT *distp, realT *mindistp, realT *maxdistp);
 void    qh_flippedmerges(facetT *facetlist, boolT *wasmerge);
 void    qh_forcedmerges( boolT *wasmerge);
 void    qh_getmergeset(facetT *facetlist);
 void    qh_getmergeset_initial(facetT *facetlist);
 void    qh_hashridge(setT *hashtable, int hashsize, ridgeT *ridge, vertexT *oldvertex);
 ridgeT *qh_hashridge_find(setT *hashtable, int hashsize, ridgeT *ridge,
               vertexT *vertex, vertexT *oldvertex, int *hashslot);
 void    qh_makeridges(facetT *facet);
 void    qh_mark_dupridges(facetT *facetlist);
 void    qh_maydropneighbor(facetT *facet);
 int     qh_merge_degenredundant(void);
 void    qh_merge_nonconvex( facetT *facet1, facetT *facet2, mergeType mergetype);
 void    qh_mergecycle(facetT *samecycle, facetT *newfacet);
 void    qh_mergecycle_all(facetT *facetlist, boolT *wasmerge);
 void    qh_mergecycle_facets( facetT *samecycle, facetT *newfacet);
 void    qh_mergecycle_neighbors(facetT *samecycle, facetT *newfacet);
 void    qh_mergecycle_ridges(facetT *samecycle, facetT *newfacet);
 void    qh_mergecycle_vneighbors( facetT *samecycle, facetT *newfacet);
 void    qh_mergefacet(facetT *facet1, facetT *facet2, realT *mindist, realT *maxdist, boolT mergeapex);
 void    qh_mergefacet2d(facetT *facet1, facetT *facet2);
 void    qh_mergeneighbors(facetT *facet1, facetT *facet2);
 void    qh_mergeridges(facetT *facet1, facetT *facet2);
 void    qh_mergesimplex(facetT *facet1, facetT *facet2, boolT mergeapex);
 void    qh_mergevertex_del(vertexT *vertex, facetT *facet1, facetT *facet2);
 void    qh_mergevertex_neighbors(facetT *facet1, facetT *facet2);
 void    qh_mergevertices(setT *vertices1, setT **vertices);
 setT   *qh_neighbor_intersections(vertexT *vertex);
 void    qh_newvertices(setT *vertices);
 boolT   qh_reducevertices(void);
 vertexT *qh_redundant_vertex(vertexT *vertex);
 boolT   qh_remove_extravertices(facetT *facet);
 vertexT *qh_rename_sharedvertex(vertexT *vertex, facetT *facet);
 void    qh_renameridgevertex(ridgeT *ridge, vertexT *oldvertex, vertexT *newvertex);
 void    qh_renamevertex(vertexT *oldvertex, vertexT *newvertex, setT *ridges,
                         facetT *oldfacet, facetT *neighborA);
 boolT   qh_test_appendmerge(facetT *facet, facetT *neighbor);
 boolT   qh_test_vneighbors(void /* qh.newfacet_list */);
 void    qh_tracemerge(facetT *facet1, facetT *facet2);
 void    qh_tracemerging(void);
 void    qh_updatetested( facetT *facet1, facetT *facet2);
 setT   *qh_vertexridges(vertexT *vertex);
 void    qh_vertexridges_facet(vertexT *vertex, facetT *facet, setT **ridges);
 void    qh_willdelete(facetT *facet, facetT *replace);
  
 #endif /* qhDEFmerge */