mirror of https://github.com/CGAL/cgal
120 lines
4.6 KiB
C++
120 lines
4.6 KiB
C++
#include<CGAL/Exact_predicates_inexact_constructions_kernel.h>
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#include<CGAL/Polygon_2.h>
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#include<CGAL/create_offset_polygons_2.h>
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#include<CGAL/draw_straight_skeleton_2.h>
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#include <memory>
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#include <iostream>
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#include <vector>
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typedef CGAL::Exact_predicates_inexact_constructions_kernel K;
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typedef K::Point_2 Point;
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typedef CGAL::Polygon_2<K> Polygon_2;
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typedef std::shared_ptr<Polygon_2> PolygonPtr;
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void low_precision_run()
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{
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Polygon_2 poly;
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poly.push_back(Point(3.4641, 16.9915));
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poly.push_back(Point(3.4641, 15.4955));
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poly.push_back(Point(3.4641, 13.0989));
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poly.push_back(Point(3.4641, 9.94113));
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poly.push_back(Point(3.4641, 6.20559));
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poly.push_back(Point(3.4641, 2.10939));
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poly.push_back(Point(3.4641, -2.10939));
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poly.push_back(Point(3.4641, -6.20559));
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poly.push_back(Point(3.4641, -9.94113));
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poly.push_back(Point(3.4641, -13.0989));
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poly.push_back(Point(3.4641, -15.4955));
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poly.push_back(Point(3.4641, -16.9915));
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poly.push_back(Point(3.4641, -17.5));
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poly.push_back(Point(-6.52835e-17, -19.5));
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poly.push_back(Point(-6.33865e-17, -18.9334));
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poly.push_back(Point(-5.78057e-17, -17.2664));
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poly.push_back(Point(-4.88654e-17, -14.596));
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poly.push_back(Point(-3.70853e-17, -11.0773));
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poly.push_back(Point(-2.31499e-17, -6.9148));
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poly.push_back(Point(-7.86906e-18, -2.35047));
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poly.push_back(Point(7.86906e-18, 2.35047));
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poly.push_back(Point(2.31499e-17, 6.9148));
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poly.push_back(Point(3.70853e-17, 11.0773));
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poly.push_back(Point(4.88654e-17, 14.596));
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poly.push_back(Point(5.78057e-17, 17.2664));
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poly.push_back(Point(6.33865e-17, 18.9334));
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poly.push_back(Point(6.52835e-17, 19.5));
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poly.push_back(Point(3.4641, 17.5));
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assert(poly.is_simple());
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if(poly.is_clockwise_oriented())
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poly.reverse_orientation();
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std::vector<PolygonPtr> exteriorSkeleton =
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CGAL::create_exterior_skeleton_and_offset_polygons_2(1e-5, poly);
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assert(exteriorSkeleton.size() == 2);
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assert(exteriorSkeleton[0]->size() == 4);
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assert(exteriorSkeleton[0]->is_simple());
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assert(exteriorSkeleton[1]->is_simple());
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}
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void high_precision_run()
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{
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Polygon_2 poly;
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poly.push_back(Point(3.4641015529632568, 16.991481781005859));
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poly.push_back(Point(3.4641015529632568, 15.495480537414551));
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poly.push_back(Point(3.4641015529632568, 13.09893798828125));
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poly.push_back(Point(3.4641015529632568, 9.9411334991455078));
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poly.push_back(Point(3.4641015529632568, 6.2055854797363281));
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poly.push_back(Point(3.4641015529632568, 2.1093919277191162));
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poly.push_back(Point(3.4641015529632568, -2.1093919277191162));
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poly.push_back(Point(3.4641015529632568, -6.2055854797363281));
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poly.push_back(Point(3.4641015529632568, -9.9411334991455078));
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poly.push_back(Point(3.4641015529632568, -13.09893798828125));
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poly.push_back(Point(3.4641015529632568, -15.495480537414551));
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poly.push_back(Point(3.4641015529632568, -16.991481781005859));
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poly.push_back(Point(3.4641015529632568, -17.5));
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poly.push_back(Point(-6.5283512761760263e-17, -19.5));
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poly.push_back(Point(-6.3386490615069335e-17, -18.933364868164063));
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poly.push_back(Point(-5.7805677252904074e-17, -17.266391754150391));
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poly.push_back(Point(-4.8865411228468343e-17, -14.595959663391113));
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poly.push_back(Point(-3.7085263204542273e-17, -11.077262878417969));
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poly.push_back(Point(-2.314985300804045e-17, -6.9147953987121582));
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poly.push_back(Point(-7.8690580132517397e-18, -2.3504652976989746));
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poly.push_back(Point(7.8690580132513576e-18, 2.3504652976989746));
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poly.push_back(Point(2.3149853008040067e-17, 6.9147953987121582));
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poly.push_back(Point(3.7085263204541891e-17, 11.077262878417969));
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poly.push_back(Point(4.8865411228467961e-17, 14.595959663391113));
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poly.push_back(Point(5.7805677252903704e-17, 17.266391754150391));
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poly.push_back(Point(6.3386490615068965e-17, 18.933364868164063));
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poly.push_back(Point(6.5283512761759894e-17, 19.5));
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poly.push_back(Point(3.4641015529632568, 17.5));
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assert(poly.is_simple());
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if(poly.is_clockwise_oriented())
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poly.reverse_orientation();
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std::vector<PolygonPtr> exteriorSkeleton =
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CGAL::create_exterior_skeleton_and_offset_polygons_2(1e-5, poly, K());
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assert(exteriorSkeleton.size() == 2);
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assert(exteriorSkeleton[0]->is_simple());
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assert(exteriorSkeleton[0]->size() == 4);
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assert(exteriorSkeleton[1]->is_simple());
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}
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int main()
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{
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std::cout << "------------------- low precision test ---------------------" << std::endl;
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low_precision_run();
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std::cout << "------------------- high precision test ---------------------" << std::endl;
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high_precision_run();
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return EXIT_SUCCESS;
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}
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