vec4: nml::vec4 operator-()

Return the negative of the current vec4.

The negative of a vec4 is calculated this way:

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

Example

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

int main() {
        nml::vec4 v(1.0f, 2.0f, 3.0f, 4.0f);
        std::cout << nml::to_string(-v) << std::endl;

        return 0;
}

Result:

[-1.000000, -2.000000, -3.000000, -4.000000]