C++ boost::geometry模块 linestring使用案例

以下是一些个人使用的C++ boost::geometry模块中的linestring 向量测试案例
包括了boost::geometry中的函数、linestring的函数以及部分STL函数

#pragma once
#include 
#include 
#include 
#include 
#include 

#include 
#include 

#include 

namespace bg = boost::geometry;
namespace bga = boost::assign;

using namespace std;
using namespace bga;

typedef bg::model::d2::point_xy BGPoint;
typedef bg::model::linestring BGVector;


// linestring 测试使用
namespace linestringTest {

	void test_init();
	void test_point();
	void test_append();
	void test_add();
	void test_size();
	void test_distance();
	void test_output_vector();
	void test_foreach();
	void test_namespace_assign();
	void test_reverse();
	void test_length();
	void test_delete_insert();
	void test_simplify();
	void test_foreach_point();
	void test_intersects();
	void test_output_as_json();



	void test_init() {

		BGVector vector{ {0, 1}, {2, 1} };

		int len = bg::length(vector);
		cout << "length: " << len << endl;
	}

	void test_point() {
		BGPoint point(1, 2);

		cout << point.x() << " " << point.y() << endl;
	}

	void test_append() {

		BGVector vector;

		// 一条经过三个点的折线
		bg::append(vector, BGPoint(0, 0));
		bg::append(vector, BGPoint(1, 1));
		bg::append(vector, BGPoint(2, 0));

		double len = bg::length(vector);
		cout << "长度为: " << len << endl;
	}

	void test_add() {
		BGVector vector;

		// namespace boost::assign 中包含的运算符 +=
		vector += BGPoint(1, 1);
		vector += BGPoint(1, 3), BGPoint(3, 3);

		double len = bg::length(vector);
		// dsv()
		cout << "add--长度为: " << len << endl;
		cout << "dsv(输出所有点): " << bg::dsv(vector) << endl;
	}

	void test_size() {
		BGVector vector;

		bg::append(vector, BGPoint(1, 1));
		bg::append(vector, BGPoint(2, 2));
		bg::append(vector, BGPoint(2, 3));
		bg::append(vector, BGPoint(3, 4));

		// linestring.size : 输出点(BGPoint)的个数
		cout << "linestring.size : " << vector.size() << endl;
		cout << "boost::size : " << boost::size(