Point Scene::random_point(const CGAL::Bbox_3& bbox)
{
FT x = random_in(bbox.xmin(),bbox.xmax());
FT y = random_in(bbox.ymin(),bbox.ymax());
FT z = random_in(bbox.zmin(),bbox.zmax());
return Point(x,y,z);
}
int main() {
std::cout.precision(17);
Point_3 p;
std::vector<Point_3> points;
while(std::cin >> p){
points.push_back(p);
}
CGAL::Bbox_3 bb = CGAL::bounding_box(points.begin(), points.end()).bbox();
double dx = bb.xmax() - bb.xmin();
double dy = bb.ymax() - bb.ymin();
double dz = bb.zmax() - bb.zmin();
for(int i = 0; i < points.size(); i++){
double rx = CGAL::default_random.get_double();
double ry = CGAL::default_random.get_double();
double rz = CGAL::default_random.get_double();
std::cout << bb.xmin() + dx * rx << " ";
std::cout << bb.ymin() + dy * ry << " ";
std::cout << bb.zmin() + dz * rz << std::endl;
}
return 0;
}
typename K::Point_3 random_point_in(const CGAL::Bbox_3& bbox)
{
typedef typename K::FT FT;
FT x = (FT)random_in(bbox.xmin(),bbox.xmax());
FT y = (FT)random_in(bbox.ymin(),bbox.ymax());
FT z = (FT)random_in(bbox.zmin(),bbox.zmax());
return typename K::Point_3(x,y,z);
}
void
Viewer::sceneChanged()
{
CGAL::Bbox_3 bb = bbox();
this->camera()->setSceneBoundingBox(qglviewer::Vec(bb.xmin(),
bb.ymin(),
bb.zmin()),
qglviewer::Vec(bb.xmax(),
bb.ymax(),
bb.zmax()));
this->showEntireScene();
}
Bbox bbox() const {
if(isEmpty())
return Bbox();
else {
CGAL::Bbox_3 result = c3t3().triangulation().finite_vertices_begin()->point().bbox();
for(Tr::Finite_vertices_iterator
vit = ++c3t3().triangulation().finite_vertices_begin(),
end = c3t3().triangulation().finite_vertices_end();
vit != end; ++vit)
{
result = result + vit->point().bbox();
}
return Bbox(result.xmin(), result.ymin(), result.zmin(),
result.xmax(), result.ymax(), result.zmax());
}
}
void Scene_c3t3_item::compute_bbox() const {
if (isEmpty())
_bbox = Bbox();
else {
CGAL::Bbox_3 result;
for (Tr::Finite_vertices_iterator
vit = ++c3t3().triangulation().finite_vertices_begin(),
end = c3t3().triangulation().finite_vertices_end();
vit != end; ++vit)
{
if(vit->in_dimension() == -1) continue;
result = result + vit->point().bbox();
}
_bbox = Bbox(result.xmin(), result.ymin(), result.zmin(),
result.xmax(), result.ymax(), result.zmax());
}
}
void Scene_c3t3_item::compute_bbox() const {
if (isEmpty())
_bbox = Bbox();
else {
CGAL::Bbox_3 result =
c3t3().cells_in_complex_begin()->vertex(0)->point().bbox();
for (C3t3::Cells_in_complex_iterator
cit = ++c3t3().cells_in_complex_begin(),
cend = c3t3().cells_in_complex_end();
cit != cend; ++cit)
{
result = result + cit->vertex(0)->point().bbox();
//only one vertex should be a satisfactory approximation
}
_bbox = Bbox(result.xmin(), result.ymin(), result.zmin(),
result.xmax(), result.ymax(), result.zmax());
}
}
void random_points(char* fname, CGAL::Bbox_3 bbox, int n)
{
std::cerr << "Write " << n << " points to file " << fname << std::endl;
CGAL::Random rg;
double grid_dx = bbox.xmax() - bbox.xmin();
double grid_dy = bbox.ymax() - bbox.ymin();
double grid_dz = bbox.zmax() - bbox.zmin();
std::ofstream out(fname);
out.precision(16);
for(int i=0; i < n; i++){
out << bbox.xmin() + rg.get_double()* grid_dx << " "
<< bbox.ymin() + rg.get_double()* grid_dy << " "
<< bbox.zmin() + rg.get_double()* grid_dz << std::endl;
}
out.close();
}
// main function with standard unix commandline arguments
// ------------------------------------------------------
int main( int argc, char **argv) {
int n = 0; // number of filenames
char *filename[1] = { NULL }; // stop compiler warning (too hard to rewrite the code to avoid it)
bool help = false;
for (int i = 1; i < argc; i++) { // check commandline options
if ( strcmp( "-v", argv[i]) == 0)
verbose = true;
else if ( strcmp( "-unit", argv[i]) == 0)
unitcube = true;
else if ( (strcmp( "-h", argv[i]) == 0) ||
(strcmp( "-help", argv[i]) == 0))
help = true;
else if ( n < 1 ) {
filename[ n++] = argv[i];
} else {
n++;
break;
}
}
if ((n > 1) || help) {
if ( ! help)
cerr << "Error: in parameter list" << endl;
cerr << "Usage: " << argv[0] << " [<options>] [<infile> [<outfile>]]"
<< endl;
cerr << "Usage: " << argv[0] << " [<options>] [<infile>]" << endl;
cerr << " computes the bbox of the coordinates of an OFF object."
<< endl;
cerr << " -unit prints transformation to unit cube." << endl;
cerr << " (can be used with 'off_transform')" << endl;
cerr << " -v verbose." << endl;
exit( ! help);
}
CGAL::Verbose_ostream verr( verbose);
verr << argv[0] << ": verbosity on." << endl;
const char* name = "cin";
istream* p_in = &cin;
ifstream in;
if ( n > 0) {
in.open( filename[0]);
p_in = ∈
name = filename[0];
}
if ( ! * p_in) {
cerr << argv[0] << ": error: cannot open file '"<< name
<< "' for reading." <<endl;
exit( 1);
}
verr << "CGAL::File_scanner_OFF( " << name << ") ...." << endl;
CGAL::File_scanner_OFF scanner( * p_in);
if ( ! * p_in) {
cerr << argv[0] << ": error: file '"<< name
<< "' is not in OFF format." << endl;
std::abort();
}
if ( scanner.size_of_vertices() <= 0) {
cerr << argv[0] << ": error: file '"<< name
<< "' has no vertices." << endl;
std::abort();
}
size_t v = scanner.size_of_vertices();
CGAL::Bbox_3 bbox;
double x, y, z;
scanner.scan_vertex( x, y, z);
bbox = CGAL::Bbox_3( x,y,z, x,y,z);
v--;
while (v--) {
scanner.scan_vertex( x, y, z);
bbox = bbox + CGAL::Bbox_3( x,y,z, x,y,z);
scanner.skip_to_next_vertex( scanner.size_of_vertices() - v - 1);
}
verr << ".... done." << scanner.size_of_vertices() << " points read."
<< endl;
if ( !in) {
cerr << argv[0] << " read error: while reading file '"<< name << "'."
<< endl;
exit( 1);
}
if ( ! unitcube) {
cout << bbox.xmin() << " " << bbox.ymin() << " " << bbox.zmin()
<< '\n';
cout << bbox.xmax() << " " << bbox.ymax() << " " << bbox.zmax()
<< endl;
} else {
double s = DBL_MAX;
double d = bbox.xmax() - bbox.xmin();
if ( d > 0 && 2/d < s)
s = 2/d;
d = bbox.ymax() - bbox.ymin();
if ( d > 0 && 2/d < s)
s = 2/d;
d = bbox.zmax() - bbox.zmin();
if ( d > 0 && 2/d < s)
s = 2/d;
if ( s == DBL_MAX)
s = 1;
cout << "-trans " << (-(bbox.xmin() + bbox.xmax())/2)
<< " " << (-(bbox.ymin() + bbox.ymax())/2)
<< " " << (-(bbox.zmin() + bbox.zmax())/2)
<< " -scale " << s << endl;
}
return 0;
}