qhull用法 C++

Qhull是一个用于计算凸包、Delaunay三角剖分和Voronoi图的库。以下是Qhull的C++用法示例：

1. 引入qhull库的头文件

#include <qhullcpp/Point.h>
#include <qhullcpp/Qhull.h>
#include <qhullcpp/QhullFacetList.h>

2. 创建点集

std::vector<qhullcpp::Point> points;

// 添加点
points.push_back(qhullcpp::Point(0.0, 0.0));
points.push_back(qhullcpp::Point(1.0, 0.0));
points.push_back(qhullcpp::Point(0.0, 1.0));
points.push_back(qhullcpp::Point(1.0, 1.0));

3. 创建Qhull对象并计算凸包

qhullcpp::Qhull qhull;
qhull.computeConvexHull(points);

4. 获取凸包顶点

const std::vector<qhullcpp::Point>& vertices = qhull.vertices();

完整示例代码如下：

#include <iostream>
#include <vector>
#include <qhullcpp/Point.h>
#include <qhullcpp/Qhull.h>
#include <qhullcpp/QhullFacetList.h>

int main()
{
    std::vector<qhullcpp::Point> points;
    points.push_back(qhullcpp::Point(0.0, 0.0));
    points.push_back(qhullcpp::Point(1.0, 0.0));
    points.push_back(qhullcpp::Point(0.0, 1.0));
    points.push_back(qhullcpp::Point(1.0, 1.0));

    qhullcpp::Qhull qhull;
    qhull.computeConvexHull(points);

    const std::vector<qhullcpp::Point>& vertices = qhull.vertices();
    std::cout << "Convex hull vertices:" << std::endl;
    for (const auto& vertex : vertices)
    {
        std::cout << vertex[0] << " " << vertex[1] << std::endl;
    }

    return 0;
}