读取数据代码：

所用离散二维点数据（由于可视化需要输入三维点数据以及其法向量，实际只用到了每行的前两个数据）：

数据点可视化显示：

#include "pch.h"

std::vector<techlego::pos2d> read_asc_file(const std::wstring& path)

{

std::ifstream ifs(path);

std::string line;

std::vector<techlego::pos2d>res;

while (std::getline(ifs, line))

{

if (line.empty())

{

continue;

}

float d0{};

float d1{};

float d2{};

float d3{};

float d4{};

float d5{};

sscanf_s(line.data(), "%f %f %f %f %f %f", &d0, &d1, &d2, &d3, &d4, &d5);

res.emplace_back(techlego::pos2d{ d0, d1 });

}

return res;

}

int main()

{

//测试数据路径

std::wstring data_path = L"D:\\soft_product1\\techlego_sdk\\C++\\examples\\拟合2d圆\\data.asc";

//读取测试数据

std::vector<techlego::pos2d> points = read_asc_file(data_path);

double x{}, y{}, r{};

//进行2D圆粗拟合

auto error = techlego::fit_circle_fast(points, x, y, r);

std::cout << "error:" << error << "\n";

std::cout << "x:" << x << "\n";

std::cout << "y:" << y << "\n";

std::cout << "r:" << r << "\n\n";

//根据粗拟合的结果再进行2D圆拟合

error = techlego::fit_cricle_fine(points, x, y, r);

std::cout << "error:" << error << "\n";

std::cout << "x:" << x << "\n";

std::cout << "y:" << y << "\n";

std::cout << "r:" << r << "\n";

return 0;

}