mirror of https://github.com/CGAL/cgal
49 lines
1.9 KiB
C++
49 lines
1.9 KiB
C++
#include <CGAL/Exact_predicates_inexact_constructions_kernel.h>
|
|
#include <CGAL/Search_traits_3.h>
|
|
#include <CGAL/Search_traits_adapter.h>
|
|
#include <CGAL/Orthogonal_k_neighbor_search.h>
|
|
#include <CGAL/Polyhedron_3.h>
|
|
#include <fstream>
|
|
|
|
typedef CGAL::Exact_predicates_inexact_constructions_kernel Kernel;
|
|
typedef Kernel::Point_3 Point_3;
|
|
|
|
typedef CGAL::Polyhedron_3<Kernel> Mesh;
|
|
typedef boost::graph_traits<Mesh>::vertex_descriptor Point;
|
|
|
|
typedef boost::property_map<Mesh,CGAL::vertex_point_t>::type Vertex_point_pmap;
|
|
|
|
typedef CGAL::Search_traits_3<Kernel> Traits_base;
|
|
typedef CGAL::Search_traits_adapter<Point,Vertex_point_pmap,Traits_base> Traits;
|
|
|
|
|
|
typedef CGAL::Orthogonal_k_neighbor_search<Traits> K_neighbor_search;
|
|
typedef K_neighbor_search::Tree Tree;
|
|
typedef Tree::Splitter Splitter;
|
|
typedef K_neighbor_search::Distance Distance;
|
|
|
|
int main(int argc, char* argv[])
|
|
{
|
|
Mesh mesh;
|
|
std::ifstream in((argc>1)?argv[1]:CGAL::data_file_path("meshes/tripod.off"));
|
|
in >> mesh;
|
|
const unsigned int K = 5;
|
|
|
|
Vertex_point_pmap vppmap = get(CGAL::vertex_point,mesh);
|
|
|
|
// Insert number_of_data_points in the tree
|
|
Tree tree(vertices(mesh).begin(), vertices(mesh).end(), Splitter(), Traits(vppmap));
|
|
|
|
// search K nearest neighbors
|
|
Point_3 query(0.0, 0.0, 0.0);
|
|
Distance tr_dist(vppmap);
|
|
|
|
K_neighbor_search search(tree, query, K,0,true,tr_dist);
|
|
std::cout <<"The "<< K << " nearest vertices to the query point at (0,0,0) are:" << std::endl;
|
|
for(K_neighbor_search::iterator it = search.begin(); it != search.end(); it++){
|
|
std::cout << "vertex " << &*(it->first) << " : " << vppmap[it->first] << " at distance "
|
|
<< tr_dist.inverse_of_transformed_distance(it->second) << std::endl;
|
|
}
|
|
return 0;
|
|
}
|