mirror of https://github.com/CGAL/cgal
76 lines
2.2 KiB
C++
76 lines
2.2 KiB
C++
#include <CGAL/Exact_predicates_exact_constructions_kernel.h>
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#include <CGAL/Polygon_2.h>
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#include <CGAL/Constrained_Delaunay_triangulation_2.h>
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#include <CGAL/Constrained_triangulation_plus_2.h>
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#include <vector>
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typedef CGAL::Exact_predicates_exact_constructions_kernel K;
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typedef CGAL::Polygon_2<K> Polygon_2;
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typedef CGAL::Exact_intersections_tag Itag;
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typedef CGAL::Constrained_Delaunay_triangulation_2<K,CGAL::Default, Itag> CDT;
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typedef CGAL::Constrained_triangulation_plus_2<CDT> CDTP;
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typedef CDTP::Point Point;
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typedef CDTP::Constraint_id Cid;
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typedef CDTP::Vertex_handle Vertex_handle;
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void
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print(const CDTP& cdtp, Cid cid)
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{
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std::cout << "Polyline constraint:" << std::endl;
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for(Vertex_handle vh : cdtp.vertices_in_constraint(cid)){
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std::cout << vh->point() << std::endl;
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}
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}
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void
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contexts(const CDTP& cdtp)
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{
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for(const auto& sc_and_contexts : cdtp.subconstraints_and_contexts()) {
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const auto& [subconstraint, contexts_list_ptr] = sc_and_contexts;
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Vertex_handle vp = subconstraint.first, vq = subconstraint.second;
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if(cdtp.number_of_enclosing_constraints(vp, vq) == 2){
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std::cout << "subconstraint " << vp->point() << " " << vq->point()
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<< " is on constraints starting at:\n";
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for(const CDTP::Context& c : *contexts_list_ptr) {
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std::cout << (*(c.vertices_begin()))->point() << std::endl;
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}
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}
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}
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}
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int
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main( )
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{
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CDTP cdtp;
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cdtp.insert_constraint(Point(0,0), Point(1,1));
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std::vector<Point> points;
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points.push_back(Point(1,1));
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points.push_back(Point(5,2));
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points.push_back(Point(6,0));
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points.push_back(Point(3,0));
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Cid id1 = cdtp.insert_constraint(points.begin(), points.end());
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print(cdtp, id1);
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Polygon_2 poly;
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poly.push_back(Point(2,3));
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poly.push_back(Point(4,0));
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poly.push_back(Point(5,0));
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poly.push_back(Point(6,2));
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Cid id2 = cdtp.insert_constraint(poly.vertices_begin(), poly.vertices_end(), true);
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print(cdtp, id1);
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print(cdtp, id2);
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contexts(cdtp);
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return 0;
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}
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