polyhedron cgal_to_polyhedron( const Nef_polyhedron &NP ){
Polyhedron P;
polyhedron ret;
if( NP.is_simple() ){
NP.convert_to_polyhedron(P);
std::vector<double> coords;
std::vector<int> tris;
int next_id = 0;
std::map< Polyhedron::Vertex*, int > vid;
for( Polyhedron::Vertex_iterator iter=P.vertices_begin(); iter!=P.vertices_end(); iter++ ){
coords.push_back( CGAL::to_double( (*iter).point().x() ) );
coords.push_back( CGAL::to_double( (*iter).point().y() ) );
coords.push_back( CGAL::to_double( (*iter).point().z() ) );
vid[ &(*iter) ] = next_id++;
}
for( Polyhedron::Facet_iterator iter=P.facets_begin(); iter!=P.facets_end(); iter++ ){
Polyhedron::Halfedge_around_facet_circulator j = iter->facet_begin();
tris.push_back( CGAL::circulator_size(j) );
do {
tris.push_back( std::distance(P.vertices_begin(), j->vertex()) );
} while ( ++j != iter->facet_begin());
}
ret.initialize_load_from_mesh( coords, tris );
} else {
std::cout << "resulting polyhedron is not simple!" << std::endl;
}
return ret;
}
void transform_big(Nef_polyhedron& N,int n, int s) {
Vertex_const_iterator vi(N.vertices_begin());
x_min = vi->point().hx()/vi->point().hw();
x_max = vi->point().hx()/vi->point().hw();
y_min = vi->point().hy()/vi->point().hw();
y_max = vi->point().hy()/vi->point().hw();
z_min = vi->point().hz()/vi->point().hw();
z_max = vi->point().hz()/vi->point().hw();
for(;vi != N.vertices_end();++vi) {
if(vi->point().hx()/vi->point().hw() < x_min)
x_min = vi->point().hx()/vi->point().hw();
if(vi->point().hx()/vi->point().hw() > x_max)
x_max = vi->point().hx()/vi->point().hw();
if(vi->point().hy()/vi->point().hw() < y_min)
y_min = vi->point().hy()/vi->point().hw();
if(vi->point().hy()/vi->point().hw() > y_max)
y_max = vi->point().hy()/vi->point().hw();
if(vi->point().hz()/vi->point().hw() < z_min)
z_min = vi->point().hz()/vi->point().hw();
if(vi->point().hz()/vi->point().hw() > z_max)
z_max = vi->point().hz()/vi->point().hw();
}
// x_min-=(x_min<=0?0:1);
// y_min-=(y_min<=0?0:1);
// z_max+=(z_max<=0?1:0);
N.transform(Aff_transformation_3(CGAL::TRANSLATION, Vector_3(-x_min,-y_min,-z_max)));
N.transform(Aff_transformation_3(CGAL::SCALING, n*s+2,x_max-x_min));
N.transform(Aff_transformation_3(CGAL::TRANSLATION, Vector_3(0,0,s/2)));
}
int main(int argc, char* argv[]) {
assert(argc>1 && argc < 7);
int nx = argc>2 ? std::atoi(argv[2]) : 2;
int ny = argc>3 ? std::atoi(argv[3]) : 2;
int nz = argc>4 ? std::atoi(argv[4]) : 2;
std::ifstream in(argv[1]);
Nef_polyhedron Nin;
in >> Nin;
Nin.transform(Aff_transformation_3(CGAL::SCALING,2,1));
std::ostringstream out1;
ggen g(out1, Nin);
g.print(nx,ny,nz);
std::istringstream in1(out1.str());
Nef_polyhedron N1;
in1 >> N1;
RT s = g.size_x();
N1.transform(Aff_transformation_3(CGAL::TRANSLATION,Vector_3(s,s,s,2)));
CGAL_assertion(N1.is_valid());
std::ostringstream out2;
CGAL::Random r;
if(argc>5) {
tgen t2(out2,s,std::atoi(argv[5]));
t2.create_tetrahedra(nx+1,ny+1,nz+1);
} else {
tgen t2(out2,s);
t2.create_tetrahedra(nx+1,ny+1,nz+1);
}
std::istringstream in2(out2.str());
Nef_polyhedron N2;
in2 >> N2;
CGAL_assertion(N2.is_valid());
cgal_nef3_timer_on = true;
#if defined CGAL_NEF3_UNION
N1.join(N2);
#elif defined CGAL_NEF3_INTERSECTION
N1.intersection(N2);
#elif defined CGAL_NEF3_DIFFERENCE
N1.difference(N2);
#else
N1.symmetric_difference(N2);
#endif
}
void transform_form(const Nef_polyhedron& N, Nef_polyhedron& F) {
Vertex_const_iterator vi(N.vertices_begin());
x_max = CGAL_NTS abs(vi->point().hx()/vi->point().hw());
y_max = CGAL_NTS abs(vi->point().hy()/vi->point().hw());
z_max = CGAL_NTS abs(vi->point().hz()/vi->point().hw());
for(; vi != N.vertices_end(); ++vi) {
if(CGAL_NTS abs(vi->point().hx()/vi->point().hw()) > x_max)
x_max = CGAL_NTS abs(vi->point().hx()/vi->point().hw());
if(CGAL_NTS abs(vi->point().hy()/vi->point().hw()) > y_max)
y_max = CGAL_NTS abs(vi->point().hy()/vi->point().hw());
if(CGAL_NTS abs(vi->point().hz()/vi->point().hw()) > z_max)
z_max = CGAL_NTS abs(vi->point().hz()/vi->point().hw());
}
x_max*105/100;
y_max*105/100;
z_max*105/100;
F.transform(Aff_transformation_3(x_max,0,0, 0,y_max,0, 0,0,z_max, 1));
F.transform(Aff_transformation_3(CGAL::TRANSLATION,Vector_3(0,0,z_max)));
}
void transform_small(Nef_polyhedron& N, int s, int l, int x, int y) {
N.transform(Aff_transformation_3(CGAL::TRANSLATION, Vector_3(-x_min,-y_min,-z_min)));
N.transform(Aff_transformation_3(CGAL::SCALING, s*l, x_max-x_min));
N.transform(Aff_transformation_3(CGAL::TRANSLATION, Vector_3((2*x+1)*s/2,(2*y+1)*s/2,s/4)));
}
int main(int argc, char* argv[]) {
// We've put the typedefs here as VC7 gives us an ICE if they are global typedefs
typedef Nef_polyhedron::SNC_structure SNC_structure;
typedef CGAL::visual_hull_creator<SNC_structure> VHC;
if(argc!=2) {
std::cerr << "Usage: visual_hull file" << std::endl;
std::cerr << "For more information read the README file" << std::endl;
return 1;
}
std::ifstream in(argv[1]);
NaryInt ni;
CGAL::Timer t;
Point_3 room_min = read_point(in);
Point_3 room_max = read_point(in);
int ncameras;
in >> ncameras;
for(int cam=0; cam<ncameras; ++cam) {
Point_3 camera(read_point(in));
int npolygons;
in >> npolygons;
std::list<std::list<Point_3> > polygon_list;
for(int poly=0; poly<npolygons; ++poly) {
int npoints;
in >> npoints;
std::list<Point_3> input_points;
for(int pnt=0; pnt<npoints; ++pnt)
input_points.push_back(read_point(in));
polygon_list.push_back(input_points);
}
std::list<std::list<Point_3> >::iterator li;
for(li=polygon_list.begin(); li!=polygon_list.end(); ++li) {
std::list<Point_3>::iterator pi(li->begin()), pimin(pi), pi_next,pi_prev;
for(; pi!=li->end(); ++pi) {
if(CGAL::lexicographically_xyz_smaller(*pi,*pimin))
pimin=pi;
}
pi_next=pi_prev=pimin;
++pi_next;
if(pi_next==li->end()) pi_next=li->begin();
if(pi_prev==li->begin()) pi_prev=li->end();
--pi_prev;
if(CGAL::orientation(*pi_prev,*pimin,*pi_next,camera)
== CGAL::POSITIVE)
li->reverse();
}
t.start();
Nef_polyhedron N;
VHC vhc(room_min, room_max, camera, polygon_list);
N.delegate(vhc,true);
CGAL_assertion(N.is_valid());
t.stop();
std::cerr << "create view " << t.time() << std::endl;
t.reset();
ni.add_polyhedron(N);
}
Nef_polyhedron result = ni.get_intersection();
QApplication a(argc,argv);
CGAL::Qt_widget_Nef_3<Nef_polyhedron>* w =
new CGAL::Qt_widget_Nef_3<Nef_polyhedron>(result);
a.setMainWidget(w);
w->show();
a.exec();
}
int main(int argc, char *argv[]) {
int c;
while (EOF != (c = getopt(argc, argv, "dPXACSp:")))
switch (c) {
case 'd':
if (debuglevel == LOG_DEBUG) {
debuglevel++;
} else {
debuglevel = LOG_DEBUG;
}
break;
case 'P':
support_enable = false;
break;
case 'X':
axes_enable = false;
break;
case 'A':
axessupport_enable = false;
break;
case 'C':
characteristics_enable = false;
break;
case 'S':
solution_enable = false;
break;
case 'p':
prefix = std::string(optarg);
break;
}
Nef_nary_union unioner;
// solution
try {
if (solution_enable) {
unioner.add_polyhedron(build_solution(thickness));
}
} catch (std::exception& x) {
debug(LOG_ERR, DEBUG_LOG, 0, "failed to add solution: %s",
x.what());
}
// characteristics
try {
if (characteristics_enable) {
unioner.add_polyhedron(build_characteristics());
}
} catch (std::exception& x) {
debug(LOG_ERR, DEBUG_LOG, 0, "failed to add charactistics: %s",
x.what());
}
// add the cut support
try {
if (support_enable) {
unioner.add_polyhedron(
build_cutsupport(2 * thickness));
}
} catch (std::exception& x) {
debug(LOG_ERR, DEBUG_LOG, 0, "failed to add cut supports: %s",
x.what());
}
// add the axes support
try {
if (axessupport_enable) {
unioner.add_polyhedron(
build_axessupport(thickness));
}
} catch (std::exception& x) {
debug(LOG_ERR, DEBUG_LOG, 0, "failed to add axes supports: %s",
x.what());
}
// axes
try {
if (axes_enable) {
unioner.add_polyhedron(build_axes());
}
} catch (std::exception& x) {
debug(LOG_ERR, DEBUG_LOG, 0, "failed to add axes: %s", x.what());
}
// extract
debug(LOG_DEBUG, DEBUG_LOG, 0, "extracting image");
Nef_polyhedron image = unioner.get_union();
// output
debug(LOG_DEBUG, DEBUG_LOG, 0, "convert for output");
Polyhedron P;
image.convert_to_polyhedron(P);
std::cout << P;
// output halves
if (prefix.size() > 0) {
PartWriter pw(prefix);
pw(PartWriter::BACK_PART, image, offset);
pw(PartWriter::FRONT_PART, image, offset);
pw(PartWriter::LEFT_PART, image, offset);
pw(PartWriter::RIGHT_PART, image, offset);
pw(PartWriter::TOP_PART, image, offset);
pw(PartWriter::BOTTOM_PART, image, offset);
} else {
debug(LOG_DEBUG, DEBUG_LOG, 0, "part output suppressed");
}
debug(LOG_DEBUG, DEBUG_LOG, 0, "output complete");
return EXIT_SUCCESS;
}
int main(int argc, char* argv[]) {
assert(argc>1 && argc < 7);
int nx = argc>2 ? std::atoi(argv[2]) : 2;
int ny = argc>3 ? std::atoi(argv[3]) : 2;
int nz = argc>4 ? std::atoi(argv[4]) : 2;
std::ifstream in(argv[1]);
Nef_polyhedron Nin;
in >> Nin;
Nin.transform(Aff_transformation_3(CGAL::SCALING,2,1));
std::ostringstream out1;
ggen g(out1, Nin);
g.print(nx,ny,nz);
std::istringstream in1(out1.str());
Nef_polyhedron N1;
in1 >> N1;
RT s = g.size_x();
N1.transform(Aff_transformation_3(CGAL::TRANSLATION,Vector_3(s,s,s,2)));
CGAL_assertion(N1.is_valid());
std::ostringstream out2;
CGAL::Random r;
if(argc>5) {
tgen t2(out2,s,std::atoi(argv[5]));
t2.create_tetrahedra(nx+1,ny+1,nz+1);
} else {
tgen t2(out2,s);
t2.create_tetrahedra(nx+1,ny+1,nz+1);
}
std::istringstream in2(out2.str());
Nef_polyhedron N2;
in2 >> N2;
CGAL_assertion(N2.is_valid());
char* dir="nef3/";
char* tetrahedra="tetrahedra";
char* grid="grid";
char* suffix=".nef3";
char* us="_";
char* full_suffix = new char[strlen(argv[2])+strlen(argv[3])+strlen(argv[4])+strlen(argv[5])+strlen(suffix)+5];
strcpy(full_suffix, us);
strcat(full_suffix, argv[2]);
strcat(full_suffix, us);
strcat(full_suffix, argv[3]);
strcat(full_suffix, us);
strcat(full_suffix, argv[4]);
strcat(full_suffix, us);
strcat(full_suffix, argv[5]);
strcat(full_suffix, suffix);
char* full_tetrahedra = new char[strlen(dir)+strlen(tetrahedra)+strlen(full_suffix)+1];
strcpy(full_tetrahedra, dir);
strcat(full_tetrahedra, tetrahedra);
strcat(full_tetrahedra, full_suffix);
std::ofstream out_tetrahedra(full_tetrahedra);
out_tetrahedra << N2;
char* full_grid = new char[strlen(dir)+strlen(grid)+strlen(full_suffix)+1];
strcpy(full_grid, dir);
strcat(full_grid, grid);
strcat(full_grid, full_suffix);
std::ofstream out_grid(full_grid);
out_grid << N1;
}
/**
* \brief main function for example6
*/
int main(int argc, char *argv[]) {
int c;
while (EOF != (c = getopt(argc, argv, "dSACIXNPFxp:")))
switch (c) {
case 'd':
if (debuglevel == LOG_DEBUG) {
debuglevel++;
} else {
debuglevel = LOG_DEBUG;
}
break;
case 'S':
show_solution = !show_solution;
break;
case 'A':
show_alternatives = !show_alternatives;
break;
case 'C':
show_characteristics = !show_characteristics;
break;
case 'I':
show_initial = !show_initial;
break;
case 'X':
show_axes = !show_axes;
break;
case 'N':
show_negative = !show_negative;
break;
case 'F':
show_fcurve = !show_fcurve;
break;
case 'P':
show_support = !show_support;
break;
case 'p':
prefix = std::string(optarg);
break;
case 'x':
yzslicing = false;
break;
}
debug(LOG_DEBUG, DEBUG_LOG, 0, "nonuniqueness of solution of a "
"partial differential equation");
// start building up the union of things to be restricted to a box
Nef_nary_union unioner;
// create a the solution surface
try {
if (show_solution) {
debug(LOG_DEBUG, DEBUG_LOG, 0, "adding solution surface");
unioner.add_polyhedron(build_solution(sheetthickness));
debug(LOG_DEBUG, DEBUG_LOG, 0, "solution surface added");
}
} catch (std::exception& x) {
debug(LOG_ERR, DEBUG_LOG, 0, "failed to add solution: %s",
x.what());
}
// create an alternative solution surface
try {
if (show_alternatives) {
debug(LOG_DEBUG, DEBUG_LOG, 0, "adding alternatives");
unioner.add_polyhedron(build_alternative(sheetthickness));
debug(LOG_DEBUG, DEBUG_LOG, 0, "alternatives added");
}
} catch (std::exception& x) {
debug(LOG_ERR, DEBUG_LOG, 0, "failed to add alternatives: %s",
x.what());
}
// add additional characteristics
try {
if (show_characteristics) {
debug(LOG_DEBUG, DEBUG_LOG, 0, "adding characteristics");
unioner.add_polyhedron(build_characteristics());
debug(LOG_DEBUG, DEBUG_LOG, 0, "characteristics added");
}
} catch (std::exception& x) {
debug(LOG_ERR, DEBUG_LOG, 0, "failed to add characteristics: %s",
x.what());
}
// add negative characteristics
try {
if (show_negative) {
debug(LOG_DEBUG, DEBUG_LOG, 0, "adding neg characteristics");
unioner.add_polyhedron(build_xcharacteristics());
debug(LOG_DEBUG, DEBUG_LOG, 0, "neg characteristics added");
}
} catch (std::exception& x) {
debug(LOG_ERR, DEBUG_LOG, 0, "failed to add negative characteristics: %s",
x.what());
}
// add the FCurve
try {
if (show_fcurve) {
debug(LOG_DEBUG, DEBUG_LOG, 0, "adding fcurve");
unioner.add_polyhedron(build_fcurve());
debug(LOG_DEBUG, DEBUG_LOG, 0, "fcurve added");
}
} catch (std::exception& x) {
debug(LOG_ERR, DEBUG_LOG, 0, "failed to add fcurve: %s",
x.what());
}
// add the support sheet
try {
if (show_support) {
debug(LOG_DEBUG, DEBUG_LOG, 0, "adding support");
unioner.add_polyhedron(build_support(sheetthickness));
debug(LOG_DEBUG, DEBUG_LOG, 0, "support added");
}
} catch (std::exception& x) {
debug(LOG_ERR, DEBUG_LOG, 0, "failed to add support: %s",
x.what());
}
// add the initial curve
if (show_initial) {
debug(LOG_DEBUG, DEBUG_LOG, 0, "adding initial curve");
unioner.add_polyhedron(build_initialcurve());
debug(LOG_DEBUG, DEBUG_LOG, 0, "initial curve added");
}
// extract union
debug(LOG_DEBUG, DEBUG_LOG, 0, "extract the image component union");
Nef_polyhedron image = unioner.get_union();
debug(LOG_DEBUG, DEBUG_LOG, 0, "base image constructed");
// restrict everything to a box
debug(LOG_DEBUG, DEBUG_LOG, 0, "restrict to a box");
Build_Box box(point(-0.1, -2, -2), point(4, 2, 2));
Polyhedron boxp;
boxp.delegate(box);
image = image * boxp;
debug(LOG_DEBUG, DEBUG_LOG, 0, "restriction complete");
// add axes
if (show_axes) {
debug(LOG_DEBUG, DEBUG_LOG, 0, "adding axes");
image = image + build_axes();
debug(LOG_DEBUG, DEBUG_LOG, 0, "axes added");
}
// output
Polyhedron P;
debug(LOG_DEBUG, DEBUG_LOG, 0, "convert to polyhedron for output");
image.convert_to_polyhedron(P);
std::cout << P;
// write parts
if (prefix.size() > 0) {
PartWriter pw(prefix);
pw(PartWriter::LEFT_PART, image);
pw(PartWriter::RIGHT_PART, image);
pw(PartWriter::FRONT_PART, image);
pw(PartWriter::BACK_PART, image);
} else {
debug(LOG_DEBUG, DEBUG_LOG, 0, "part output suppressed");
}
// that's it
debug(LOG_DEBUG, DEBUG_LOG, 0, "output complete");
return EXIT_SUCCESS;
}
int main(int argc, char* argv[]) {
assert(argc>1 && argc < 8);
int nx = argc>2 ? std::atoi(argv[2]) : 2;
int ny = argc>3 ? std::atoi(argv[3]) : 2;
int nz = argc>4 ? std::atoi(argv[4]) : 2;
int n = argc>5 ? std::atoi(argv[5]) : 2;
std::ifstream in(argv[1]);
Nef_polyhedron Nin;
in >> Nin;
Nin.transform(Aff_transformation_3(CGAL::SCALING,100,1));
std::ostringstream out1;
ggen g(out1, Nin);
g.print(nx,ny,nz);
std::istringstream in1(out1.str());
Nef_polyhedron N1;
in1 >> N1;
RT s = g.size_x();
N1.transform(Aff_transformation_3(CGAL::TRANSLATION,Vector_3(s,s,s,2)));
CGAL_assertion(N1.is_valid());
std::ostringstream out2;
if(argc>6) {
tgen t2(out2,s,std::atoi(argv[6]));
t2.create_tetrahedra(nx+1,ny+1,nz+1);
} else {
tgen t2(out2,s);
t2.create_tetrahedra(nx+1,ny+1,nz+1);
}
std::istringstream in2(out2.str());
Nef_polyhedron N2;
in2 >> N2;
CGAL_assertion(N2.is_valid());
#if defined CGAL_NEF3_UNION
N1=N1.join(N2);
#elif defined CGAL_NEF3_INTERSECTION
N1=N1.intersection(N2);
#elif defined CGAL_NEF3_DIFFERENCE
N1=N1.difference(N2);
#else
N1=N1.symmetric_difference(N2);
#endif
RT b=s*(nx+1);
N1.transform(Aff_transformation_3(CGAL::TRANSLATION,Vector_3(-b,-b,-b,2)));
CGAL::Timer pl;
pl.start();
Point_source P(CGAL::to_double(b)/2);
for(int i=0;i<n;++i) {
N1.locate(*P++);
}
pl.stop();
std::cout << "Input_size: " << N1.number_of_vertices() << std::endl;
std::cout << "Number_of_point_location_queries: " << n << std::endl;
std::cout << "Total_runtime: " << pl.time() << std::endl;
std::cout << "Runtime_per_query: " << pl.time()/n << std::endl;
}