升压交叉

本文介绍了升压交叉的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述 29岁程序员，3月因学历无情被辞！ 我有一个boost交叉算法的问题。我不知道我是否有错误或是错误。I have a problem with boost intersection algorithm. I am not sure if I did an error or it is a bug.#include <boost/geometry/algorithms/intersection.hpp>#include <boost/version.hpp>#include <boost/geometry.hpp>#include <boost/geometry/geometries/point_xy.hpp>#include <boost/geometry/geometries/ring.hpp>#include <boost/geometry/geometries/polygon.hpp>int main(){ typedef boost::geometry::model::d2::point_xy<double> BoostPointXY; typedef boost::geometry::model::polygon<BoostPointXY> BoostPolygon; BoostPolygon polyOne, polyTwo; boost::geometry::read_wkt( "POLYGON((45, 4), (45, 17), (44, 19), (44, 22), (50, 20), (51.5, 17), (58, 4), (60, 0), (53, 0), (45, 0), (45, 4))", polyOne); boost::geometry::read_wkt( "POLYGON((-10, -5), (0, 25), (43, 25), (45, 20), (50, 20), (60, 0), (5, 0), (5, -5), (-10, -5))", polyTwo); std::vector<BoostPolygon> multiPoly; boost::geometry::correct(polyOne); boost::geometry::correct(polyTwo); boost::geometry::intersection(polyOne,polyTwo,multiPoly); std::cout << "Size of Multi " << multiPoly.size() << std::endl; std::cout << "Using Boost " << BOOST_VERSION / 100000 << "." // major version << BOOST_VERSION / 100 % 1000 << "." // minior version << BOOST_VERSION % 100 // patch level << std::endl;}输出：Size of Multi 0Using Boost 1.55.0但是multiPolygon的大小应该是1还是？当它是一个错误，有人可以用当前提升1.57测试它吗？我现在不能改变我的boost版本。But the size of the multiPolygon should be 1 or? When it is a bug, can someone test it with the current boost 1.57 ? I can't change my boost version at the moment.感谢推荐答案您的WKT资料无效：boost::geometry::read_wkt("POLYGON((45 4, 45 17, 44 19, 44 22, 50 20, 51.5 17, 58 4, 60 0, 53 0, 45 0, 45 4))", polyOne);boost::geometry::read_wkt("POLYGON((-10 -5, 0 25, 43 25, 45 20, 50 20, 60 0, 5 0, 5 -5, -10 -5))", polyTwo);您的示例刚刚使用了许多无效（？）内圈。Your sample just used many invalid(?) inner rings.现在你得到：Size of Multi 1 >#include <boost/geometry.hpp>#include <boost/geometry/algorithms/intersection.hpp>#include <boost/geometry/geometries/point_xy.hpp>#include <boost/geometry/geometries/polygon.hpp>#include <boost/geometry/geometries/ring.hpp>#include <boost/geometry/io/io.hpp>#include <fstream>#include <iostream>int main() { typedef boost::geometry::model::d2::point_xy<double> BoostPointXY; typedef boost::geometry::model::polygon<BoostPointXY> BoostPolygon; BoostPolygon polyOne, polyTwo; boost::geometry::read_wkt("POLYGON((45 4, 45 17, 44 19, 44 22, 50 20, 51.5 17, 58 4, 60 0, 53 0, 45 0, 45 4))", polyOne); boost::geometry::read_wkt("POLYGON((-10 -5, 0 25, 43 25, 45 20, 50 20, 60 0, 5 0, 5 -5, -10 -5))", polyTwo); boost::geometry::correct(polyOne); boost::geometry::correct(polyTwo); { std::ofstream svg("/tmp/svg.svg"); boost::geometry::svg_mapper<BoostPointXY> mapper(svg, 400, 400); mapper.add(polyOne); mapper.add(polyTwo); mapper.map(polyOne, "fill-opacity:0.5;fill:rgb(153,204,0);stroke:rgb(153,204,0);stroke-width:2"); mapper.map(polyTwo, "fill-opacity:0.5;fill:rgb(204,153,0);stroke:rgb(204,153,0);stroke-width:2"); } std::vector<BoostPolygon> multiPoly; boost::geometry::intersection(polyOne,polyTwo,multiPoly); std::cout << "Size of Multi " << multiPoly.size() << std::endl;} 这篇关于升压交叉的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！ 上岸，阿里云！