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QhullFacet.cpp
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Wed, Jul 16, 14:34

QhullFacet.cpp
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/****************************************************************************
**
** Copyright (c) 2008-2015 C.B. Barber. All rights reserved.
** $Id: //main/2011/qhull/src/libqhullpcpp/QhullFacet.cpp#2 $$Change: 1810 $
** $DateTime: 2015/01/17 18:28:15 $$Author: bbarber $
**
****************************************************************************/
#//! QhullFacet -- Qhull's facet structure, facetT, as a C++ class
#include "QhullError.h"
#include "QhullSet.h"
#include "QhullPoint.h"
#include "QhullPointSet.h"
#include "QhullRidge.h"
#include "QhullFacet.h"
#include "QhullFacetSet.h"
#include "QhullVertex.h"
#include <ostream>
using std::endl;
using std::string;
using std::vector;
using std::ostream;
#ifdef _MSC_VER // Microsoft Visual C++ -- warning level 4
#pragma warning( disable : 4611) // interaction between '_setjmp' and C++ object destruction is non-portable
#pragma warning( disable : 4996) // function was declared deprecated(strcpy, localtime, etc.)
#endif
namespace orgQhull {
#//class statics
facetT QhullFacet::
s_empty_facet= {0,0,0,0,{0},
0,0,0,0,0,
0,0,0,0,0,
0,0,0,0,0,
0,0,0,0,0,
0,0,0,0,0,
0,0,0,0,0,
0,0,0,0};
#//GetSet
int QhullFacet::
dimension() const
{
if(qh_facet->ridges){
setT *s= qh_facet->ridges;
ridgeT *r= reinterpret_cast<ridgeT *>(SETfirst_(s));
return r ? QhullSetBase::count(r->vertices)+1 : 0;
}else{
return QhullSetBase::count(qh_facet->vertices);
}
}//dimension
//! Return voronoi center or facet centrum. Derived from qh_printcenter [io.c]
//! printFormat=qh_PRINTtriangles if return centrum of a Delaunay facet
//! Sets center if needed
//! Code duplicated for PrintCenter and getCenter
//! .empty() if none or qh_INFINITE
QhullPoint QhullFacet::
getCenter(int qhRunId, qh_PRINT printFormat)
{
UsingLibQhull q(qhRunId);
if(qh CENTERtype==qh_ASvoronoi){
if(!qh_facet->normal || !qh_facet->upperdelaunay || !qh ATinfinity){
if(!qh_facet->center){
int exitCode = setjmp(qh errexit);
if(!exitCode){ // no object creation -- destructors skipped on longjmp()
qh_facet->center= qh_facetcenter(qh_facet->vertices);
}
q.maybeThrowQhullMessage(exitCode);
}
return QhullPoint(qh hull_dim-1, qh_facet->center);
}
}else if(qh CENTERtype==qh_AScentrum){
volatile int numCoords= qh hull_dim;
if(printFormat==qh_PRINTtriangles && qh DELAUNAY){
numCoords--;
}
if(!qh_facet->center){
int exitCode = setjmp(qh errexit);
if(!exitCode){ // no object creation -- destructors skipped on longjmp()
qh_facet->center= qh_getcentrum(getFacetT());
}
q.maybeThrowQhullMessage(exitCode);
}
return QhullPoint(numCoords, qh_facet->center);
}
return QhullPoint();
}//getCenter
//! Return innerplane clearly below the vertices
//! from io.c[qh_PRINTinner]
QhullHyperplane QhullFacet::
innerplane(int qhRunId) const{
UsingLibQhull q(qhRunId);
realT inner;
// Does not error
qh_outerinner(const_cast<facetT *>(getFacetT()), NULL, &inner);
QhullHyperplane h= hyperplane();
h.setOffset(h.offset()-inner); //inner is negative
return h;
}//innerplane
//! Return outerplane clearly above all points
//! from io.c[qh_PRINTouter]
QhullHyperplane QhullFacet::
outerplane(int qhRunId) const{
UsingLibQhull q(qhRunId);
realT outer;
// Does not error
qh_outerinner(const_cast<facetT *>(getFacetT()), &outer, NULL);
QhullHyperplane h= hyperplane();
h.setOffset(h.offset()-outer); //outer is positive
return h;
}//outerplane
//! Set by qh_triangulate for option 'Qt'.
//! Errors if tricoplanar and facetArea() or qh_getarea() called first.
QhullFacet QhullFacet::
tricoplanarOwner() const
{
if(qh_facet->tricoplanar){
if(qh_facet->isarea){
throw QhullError(10018, "Qhull error: facetArea() or qh_getarea() previously called. triCoplanarOwner() is not available.");
}
return qh_facet->f.triowner;
}
return 0; // FIXUP QH11009 Should false be the NULL facet or empty facet
}//tricoplanarOwner
QhullPoint QhullFacet::
voronoiVertex(int qhRunId)
{
if(
#if qh_QHpointer
!qh_qh ||
#endif
qh CENTERtype!=qh_ASvoronoi){
throw QhullError(10052, "Error: QhullFacet.voronoiVertex() requires option 'v' (qh_ASvoronoi)");
}
return getCenter(qhRunId);
}//voronoiVertex
#//Value
//! Disables tricoplanarOwner()
double QhullFacet::
facetArea(int qhRunId)
{
if(!qh_facet->isarea){
UsingLibQhull q(qhRunId);
int exitCode = setjmp(qh errexit);
if(!exitCode){ // no object creation -- destructors skipped on longjmp()
qh_facet->f.area= qh_facetarea(qh_facet);
qh_facet->isarea= True;
}
q.maybeThrowQhullMessage(exitCode);
}
return qh_facet->f.area;
}//facetArea
#//Foreach
QhullPointSet QhullFacet::
coplanarPoints() const
{
return QhullPointSet(dimension(), qh_facet->coplanarset);
}//coplanarPoints
QhullFacetSet QhullFacet::
neighborFacets() const
{
return QhullFacetSet(qh_facet->neighbors);
}//neighborFacets
QhullPointSet QhullFacet::
outsidePoints() const
{
return QhullPointSet(dimension(), qh_facet->outsideset);
}//outsidePoints
QhullRidgeSet QhullFacet::
ridges() const
{
return QhullRidgeSet(qh_facet->ridges);
}//ridges
QhullVertexSet QhullFacet::
vertices() const
{
return QhullVertexSet(qh_facet->vertices);
}//vertices
}//namespace orgQhull
#//operator<<
using std::ostream;
using orgQhull::QhullFacet;
using orgQhull::QhullFacetSet;
using orgQhull::QhullPoint;
using orgQhull::QhullPointSet;
using orgQhull::QhullRidge;
using orgQhull::QhullRidgeSet;
using orgQhull::QhullSetBase;
using orgQhull::QhullVertexSet;
using orgQhull::UsingLibQhull;
ostream &
operator<<(ostream &os, const QhullFacet::PrintFacet &pr)
{
QhullFacet f= *pr.facet;
if(f.getFacetT()==0){ // Special values from set iterator
os << " NULLfacet" << endl;
return os;
}
if(f.getFacetT()==qh_MERGEridge){
os << " MERGEridge" << endl;
return os;
}
if(f.getFacetT()==qh_DUPLICATEridge){
os << " DUPLICATEridge" << endl;
return os;
}
os << f.printHeader(pr.run_id);
if(!f.ridges().isEmpty()){
os << f.printRidges(pr.run_id);
}
return os;
}//operator<< PrintFacet
//! Print Voronoi center or facet centrum to stream. Same as qh_printcenter [io.c]
//! Code duplicated for PrintCenter and getCenter
//! Sets center if needed
ostream &
operator<<(ostream &os, const QhullFacet::PrintCenter &pr)
{
facetT *f= pr.facet->getFacetT();
if(qh CENTERtype!=qh_ASvoronoi && qh CENTERtype!=qh_AScentrum){
return os;
}
if (pr.message){
os << pr.message;
}
int numCoords;
if(qh CENTERtype==qh_ASvoronoi){
numCoords= qh hull_dim-1;
if(!f->normal || !f->upperdelaunay || !qh ATinfinity){
if(!f->center){
f->center= qh_facetcenter(f->vertices);
}
for(int k=0; k<numCoords; k++){
os << f->center[k] << " "; // FIXUP QH11010 qh_REAL_1
}
}else{
for(int k=0; k<numCoords; k++){
os << qh_INFINITE << " "; // FIXUP QH11010 qh_REAL_1
}
}
}else{ // qh CENTERtype==qh_AScentrum
numCoords= qh hull_dim;
if(pr.print_format==qh_PRINTtriangles && qh DELAUNAY){
numCoords--;
}
if(!f->center){
f->center= qh_getcentrum(f);
}
for(int k=0; k<numCoords; k++){
os << f->center[k] << " "; // FIXUP QH11010 qh_REAL_1
}
}
if(pr.print_format==qh_PRINTgeom && numCoords==2){
os << " 0";
}
os << endl;
return os;
}//operator<< PrintCenter
//! Print flags for facet to stream. Space prefix. From qh_printfacetheader [io.c]
ostream &
operator<<(ostream &os, const QhullFacet::PrintFlags &p)
{
const facetT *f= p.facet->getFacetT();
if(p.message){
os << p.message;
}
os << (p.facet->isTopOrient() ? " top" : " bottom");
if(p.facet->isSimplicial()){
os << " simplicial";
}
if(p.facet->isTriCoplanar()){
os << " tricoplanar";
}
if(p.facet->isUpperDelaunay()){
os << " upperDelaunay";
}
if(f->visible){
os << " visible";
}
if(f->newfacet){
os << " new";
}
if(f->tested){
os << " tested";
}
if(!f->good){
os << " notG";
}
if(f->seen){
os << " seen";
}
if(f->coplanar){
os << " coplanar";
}
if(f->mergehorizon){
os << " mergehorizon";
}
if(f->keepcentrum){
os << " keepcentrum";
}
if(f->dupridge){
os << " dupridge";
}
if(f->mergeridge && !f->mergeridge2){
os << " mergeridge1";
}
if(f->mergeridge2){
os << " mergeridge2";
}
if(f->newmerge){
os << " newmerge";
}
if(f->flipped){
os << " flipped";
}
if(f->notfurthest){
os << " notfurthest";
}
if(f->degenerate){
os << " degenerate";
}
if(f->redundant){
os << " redundant";
}
os << endl;
return os;
}//operator<< PrintFlags
//! Print header for facet to stream. Space prefix. From qh_printfacetheader [io.c]
ostream &
operator<<(ostream &os, const QhullFacet::PrintHeader &pr)
{
QhullFacet facet= *pr.facet;
facetT *f= facet.getFacetT();
os << "- f" << facet.id() << endl;
os << facet.printFlags(" - flags:");
if(f->isarea){
os << " - area: " << f->f.area << endl; //FIXUP QH11010 2.2g
}else if(qh NEWfacets && f->visible && f->f.replace){
os << " - replacement: f" << f->f.replace->id << endl;
}else if(f->newfacet){
if(f->f.samecycle && f->f.samecycle != f){
os << " - shares same visible/horizon as f" << f->f.samecycle->id << endl;
}
}else if(f->tricoplanar /* !isarea */){
if(f->f.triowner){
os << " - owner of normal & centrum is facet f" << f->f.triowner->id << endl;
}
}else if(f->f.newcycle){
os << " - was horizon to f" << f->f.newcycle->id << endl;
}
if(f->nummerge){
os << " - merges: " << f->nummerge << endl;
}
os << facet.hyperplane().print(" - normal: ", "\n - offset: "); // FIXUP QH11010 %10.7g
if(qh CENTERtype==qh_ASvoronoi || f->center){
os << facet.printCenter(pr.run_id, qh_PRINTfacets, " - center: ");
}
#if qh_MAXoutside
if(f->maxoutside > qh DISTround){
os << " - maxoutside: " << f->maxoutside << endl; //FIXUP QH11010 %10.7g
}
#endif
QhullPointSet ps= facet.outsidePoints();
if(!ps.isEmpty()){
QhullPoint furthest= ps.last();
if (ps.size() < 6) {
os << " - outside set(furthest p" << furthest.id(pr.run_id) << "):" << endl;
for(QhullPointSet::iterator i=ps.begin(); i!=ps.end(); ++i){
QhullPoint p= *i;
os << p.print(pr.run_id, " ");
}
}else if(ps.size()<21){
os << ps.print(pr.run_id, " - outside set:");
}else{
os << " - outside set: " << ps.size() << " points.";
os << furthest.print(pr.run_id, " Furthest");
}
#if !qh_COMPUTEfurthest
os << " - furthest distance= " << f->furthestdist << endl; //FIXUP QH11010 %2.2g
#endif
}
QhullPointSet cs= facet.coplanarPoints();
if(!cs.isEmpty()){
QhullPoint furthest= cs.last();
if (cs.size() < 6) {
os << " - coplanar set(furthest p" << furthest.id(pr.run_id) << "):" << endl;
for(QhullPointSet::iterator i=cs.begin(); i!=cs.end(); ++i){
QhullPoint p= *i;
os << p.print(pr.run_id, " ");
}
}else if(cs.size()<21){
os << cs.print(pr.run_id, " - coplanar set:");
}else{
os << " - coplanar set: " << cs.size() << " points.";
os << furthest.print(pr.run_id, " Furthest");
}
zinc_(Zdistio);
double d= facet.distance(furthest);
os << " furthest distance= " << d << endl; //FIXUP QH11010 %2.2g
}
QhullVertexSet vs= facet.vertices();
if(!vs.isEmpty()){
os << vs.print(pr.run_id, " - vertices:");
}
QhullFacetSet fs= facet.neighborFacets();
fs.selectAll();
if(!fs.isEmpty()){
os << fs.printIdentifiers(" - neighboring facets:");
}
return os;
}//operator<< PrintHeader
//! Print ridges of facet to stream. Same as qh_printfacetridges [io.c]
//! If qhRunId==UsingLibQhull::NOqhRunId, does not use qh
ostream &
operator<<(ostream &os, const QhullFacet::PrintRidges &pr)
{
const QhullFacet facet= *pr.facet;
facetT *f= facet.getFacetT();
QhullRidgeSet rs= facet.ridges();
if(!rs.isEmpty()){
if(pr.run_id!=UsingLibQhull::NOqhRunId){
UsingLibQhull q(pr.run_id);
// No calls to libqhull
if(f->visible && qh NEWfacets){
os << " - ridges(ids may be garbage):";
for(QhullRidgeSet::iterator i=rs.begin(); i!=rs.end(); ++i){
QhullRidge r= *i;
os << " r" << r.id();
}
os << endl;
}else{
os << " - ridges:" << endl;
}
}else{
os << " - ridges:" << endl;
}
// Keep track of printed ridges
for(QhullRidgeSet::iterator i=rs.begin(); i!=rs.end(); ++i){
QhullRidge r= *i;
r.getRidgeT()->seen= false;
}
int ridgeCount= 0;
if(facet.dimension()==3){
for(QhullRidge r= rs.first(); !r.getRidgeT()->seen; r= r.nextRidge3d(facet)){
r.getRidgeT()->seen= true;
os << r.print(pr.run_id);
++ridgeCount;
if(!r.hasNextRidge3d(facet)){
break;
}
}
}else {
QhullFacetSet ns(facet.neighborFacets());
for(QhullFacetSet::iterator i=ns.begin(); i!=ns.end(); ++i){
QhullFacet neighbor= *i;
QhullRidgeSet nrs(neighbor.ridges());
for(QhullRidgeSet::iterator j=nrs.begin(); j!=nrs.end(); ++j){
QhullRidge r= *j;
if(r.otherFacet(neighbor)==facet){
r.getRidgeT()->seen= true;
os << r.print(pr.run_id);
ridgeCount++;
}
}
}
}
if(ridgeCount!=rs.count()){
os << " - all ridges:";
for(QhullRidgeSet::iterator i=rs.begin(); i!=rs.end(); ++i){
QhullRidge r= *i;
os << " r" << r.id();
}
os << endl;
}
for(QhullRidgeSet::iterator i=rs.begin(); i!=rs.end(); ++i){
QhullRidge r= *i;
if(!r.getRidgeT()->seen){
os << r.print(pr.run_id);
}
}
}
return os;
}//operator<< PrintRidges
// "No conversion" error if defined inline
ostream &
operator<<(ostream &os, QhullFacet &f)
{
os << f.print(UsingLibQhull::NOqhRunId);
return os;
}//<< QhullFacet

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