CGAL 6.1.2 - 2D Polyline Simplification

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Polyline_simplification_2/simplify_overlapping_polylines.cpp
#include <iostream>
#include <CGAL/Exact_predicates_inexact_constructions_kernel.h>
#include <CGAL/Polygon_2.h>
#include <CGAL/Constrained_Delaunay_triangulation_2.h>
#include <CGAL/Constrained_triangulation_plus_2.h>
#include <CGAL/Polyline_simplification_2/simplify.h>
#include <CGAL/Polyline_simplification_2/Squared_distance_cost.h>
namespace PS = CGAL::Polyline_simplification_2;
typedef CGAL::Exact_predicates_inexact_constructions_kernel K;
typedef PS::Vertex_base_2<K> Vb;
typedef CGAL::Constrained_triangulation_face_base_2<K> Fb;
typedef CGAL::Triangulation_data_structure_2<Vb, Fb> TDS;
typedef CGAL::Constrained_Delaunay_triangulation_2<K, TDS, CGAL::Exact_predicates_tag> CDT;
typedef CGAL::Constrained_triangulation_plus_2<CDT> CT;
typedef CT::Point Point;
typedef CT::Constraint_iterator Constraint_iterator;
typedef CT::Vertices_in_constraint_iterator Vertices_in_constraint_iterator;
typedef CT::Points_in_constraint_iterator Points_in_constraint_iterator;
typedef PS::Stop_below_count_ratio_threshold Stop;
typedef PS::Squared_distance_cost Cost;
int main()
{
CT ct;
std::vector<Point> P = { Point(0,1), Point(1,1), Point(2,2), Point(3,1), Point(4,1), Point(4,2), Point(4,1), Point(5,1) };
std::vector<Point> Q = { Point(5,0), Point(4,1), Point(3,1), Point(2,2), Point(1,1), Point(0,0) };
std::vector<Point> R = { Point(3,1), Point(4,1) };
ct.insert_constraint(P);
ct.insert_constraint(Q);
ct.insert_constraint(R);
PS::simplify(ct, Cost(), Stop(0.5));
for(Constraint_iterator cit = ct.constraints_begin();
cit != ct.constraints_end();
++cit) {
std::cout << "simplified polyline" << std::endl;
for(Points_in_constraint_iterator vit =
ct.points_in_constraint_begin(*cit);
vit != ct.points_in_constraint_end(*cit);
++vit)
std::cout << *vit << std::endl;
}
return 0;
}
CGAL::Constrained_Delaunay_triangulation_2
CGAL::Constrained_triangulation_face_base_2
CGAL::Constrained_triangulation_plus_2
CGAL::Constrained_triangulation_plus_2::insert_constraint
Constraint_id insert_constraint(Point a, Point b)
CGAL::Exact_predicates_inexact_constructions_kernel
CGAL::Polyline_simplification_2
Definition: Hybrid_squared_distance_cost.h:24