nml::vec4 operator-(nml::vec4 lhs, const nml::vec4& rhs)

Return a vec4 that is the difference between two vec4.

The difference between two vec4 is calculated this way:

\(\begin{bmatrix} lhs.x \\ lhs.y \\ lhs.z \\ lhs.w \end{bmatrix} - \begin{bmatrix} rhs.x \\ rhs.y \\ rhs.z \\ rhs.w \end{bmatrix} = \begin{bmatrix} lhs.x - rhs.x \\ lhs.y - rhs.y \\ lhs.z - rhs.z \\ lhs.w - rhs.w \end{bmatrix}\)

Example

#include "include/vec4.h"
#include <iostream>

int main() {
        nml::vec4 a(2.0f, 5.0f, 7.0f, 8.0f);
        nml::vec4 b(1.0f, 2.0f, 6.5f, 7.0f);
        nml::vec4 c = a - b;
        std::cout << nml::to_string(c) << std::endl;

        return 0;
}

Result:

[1.000000, 3.000000, 0.500000, 1.000000]