需要帮助理解这个基本的 Vector3D 结构的代码

Need help understanding this basic Vector3D structure's code

本文关键字:Vector3D 结构 代码 帮助 助理      更新时间:2023-10-16

我试图通过一本书学习线性代数,作者为Vector3D的基本结构留下了一个代码块。除了float&运算符和常量float&操作人员如果我能在这里得到对代码的深入解释,这可能吗?

我曾尝试在谷歌上搜索运算符的使用情况,这使得这两个代码块看起来像是在进行某种隐式转换,但我仍然对其他一切感到不知所措。

#include <iostream>
using namespace std;
//Math Engine
struct Vector3D
{
float x, y, z;
Vector3D(float X, float Y, float Z)
{
x = X;
y = Y;
z = Z;
}
Vector3D() = default;
float& operator [](int i)
{
return ((&x)[i]);
}
const float& operator [](int i) const
{
return ((&x)[i]);
}
};
int main()
{
return 0;
}
#include <iostream>
using namespace std;
//Math Engine
struct Vector3D
{
//take array instead of separate elements, this it will be contiguous in memory
float x[3];
Vector3D(float X, float Y, float Z)
{
x[0] = X;
x[1] = Y;
x[2] = Z;
}
Vector3D() = default;

//this will allow to Get and Set the value of vector
float& operator [](int i)
{
assert( 0 <= i && i < 3 );
return x[i];
}
//this will **NOT** allow to Set the value of vector but you can get it
const float& operator [](int i) const
{
assert( 0 <= i && i < 3 );
return x[i];
}
};
int main()
{
return 0;
}