typedef struct {
    float x;
    float y;
    float z;
} t_vect;

t_vect u_vect_add(t_vect a, t_vect b) {
    /* result */
    t_vect r = {
        a.x + b.x,
        a.y + b.y,
        a.z + b.z
    };

    return(r);
}

t_vect u_vect_sub(t_vect a, t_vect b) {
    /* result */
    t_vect r = {
        a.x - b.x,
        a.y - b.y,
        a.z - b.z
    };

    return(r);
}

t_vect u_vect_mul(t_vect a, float k) {
    /* result */
    t_vect r = {
        a.x * k,
        a.y * k,
        a.z * k
    };

    return(r);
}

t_vect u_vect_div(t_vect a, float k) {
    /* result */
    t_vect r = {
        a.x / k,
        a.y / k,
        a.z / k
    };

    return(r);
}