瞎写的一个r=a*(1-sinθ)～

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已于 2023-05-09 18:56:52 修改

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文章标签： c++ 算法开发语言

于 2023-05-09 18:55:04 首次发布

本文链接：https://blog.youkuaiyun.com/weixin_43813647/article/details/130586405

版权

#include <iostream>

#include <cmath>
#include <boost/geometry.hpp>
#include <boost/geometry/geometries/polygon.hpp>
#include <boost/geometry/geometries/adapted/boost_tuple.hpp>

BOOST_GEOMETRY_REGISTER_BOOST_TUPLE_CS(cs::cartesian)

using namespace std;
namespace bg=boost::geometry;
typedef bg::model::d2::point_xy<double> point_t;
typedef bg::model::segment<point_t> segment_t;
typedef bg::model::linestring<point_t> line_t;
typedef bg::model::polygon<point_t> polygon_t;
typedef bg::model::multi_polygon<polygon_t> mpolygon_t;
typedef bg::strategy::transform::rotate_transformer<boost::geometry::radian, double, 2UL, 2UL> rotate_t;

int main()
{
    polygon_t a;
    for(int i=0;i<=360;i++)
    {
        double c;
        point_t b;
        c=(1-sin(M_PI*i/180))*cos(M_PI*i/180);
        b.set<0>(c);
        c=(1-sin(M_PI*i/180))*sin(M_PI*i/180);
        b.set<1>(c);
        a.outer().push_back(b);
    }
    // cout<<sin(M_PI*30/180)<<"\n";
    return 0;
}