/* ---------------------------------
merge.h
header file for merge.c
see qh-merge.htm and merge.c
Copyright (c) 1993-2012 C.B. Barber.
$Id: //main/2011/qhull/src/libqhull/merge.h#3 $$Change: 1464 $
$DateTime: 2012/01/25 22:58:41 $$Author: bbarber $
*/
#ifndef qhDEFmerge
#define qhDEFmerge 1
#include "libqhull.h"
/*============ -constants- ==============*/
/*----------------------------------
qh_ANGLEredundant
indicates redundant merge in mergeT->angle
*/
#define qh_ANGLEredundant 6.0
/*----------------------------------
qh_ANGLEdegen
indicates degenerate facet in mergeT->angle
*/
#define qh_ANGLEdegen 5.0
/*----------------------------------
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
/*----------------------------------
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;
/*----------------------------------
qh_MERGEapex
flag for qh_mergefacet() to indicate an apex merge
*/
#define qh_MERGEapex True
/*============ -structures- ====================*/
/*----------------------------------
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- =========================*/
/*----------------------------------
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 FOREACHsetelement_
*/
#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 */