VectorD.h
//
// Created by LiuQiang on 2020/12/31.
//
#ifndef ROBOTICS_MATH_VECTOR3D_H
#define ROBOTICS_MATH_VECTOR3D_H
#include <Eigen/Dense>
#include <iostream>
namespace math {
template<typename T = double>
class Vector3D {
private:
Eigen::Matrix<T, 3, 1> m_vec;
public:
Vector3D();
Vector3D(T x, T y, T z);
T &operator[](size_t n);
const T &operator[](size_t n) const;
template<typename R> //友元函式需要加這個
friend std::ostream &operator<<(std::ostream &os, const Vector3D<R> &vec);
};
}
#endif //ROBOTICS_MATH_VECTOR3D_H
Vector3D.cpp
//
// Created by LiuQiang on 2020/12/31.
//
#include "Vector3D.h"
#include <cassert>
namespace math {
template<typename T>
Vector3D<T>::Vector3D() {
m_vec << 0, 0, 0;
}
template<typename T>
Vector3D<T>::Vector3D(T x, T y, T z) {
m_vec << x, y, z;
}
template<typename T>
T &Vector3D<T>::operator[](size_t n) {
assert(n <= 2);
return m_vec[n];
}
template<typename T>
const T &Vector3D<T>::operator[](size_t n) const {
assert(n <= 2);
return m_vec[n];
}
template<typename R>
std::ostream &operator<< (std::ostream &os, const Vector3D<R> &vec) {
return os << "Vector3D {" << vec[0] << ", " << vec[1] << ", " << vec[2] << "}";
}
template
class Vector3D<double>; //模板類需要特化
template
class Vector3D<float>; //模板類需要特化
template std::ostream &operator<<(std::ostream &output, const Vector3D<double> &vec); //多載輸出運算子需要特化
template std::ostream &operator<<(std::ostream &output, const Vector3D<float> &vec); //多載輸出運算子需要特化
}
這是我不斷試錯，摸索出來的一個可行的方案，
轉載請註明出處，本文鏈接：https://www.uj5u.com/qukuanlian/244342.html
標籤：區塊鏈