Method normalizeIfNonzero

utils/cpp_utils/include/vec3.h:247–254

If this vec3 is non-zero, then normalize it, else return

    //! If this vec3 is non-zero, then normalize it, else return
    inline void normalizeIfNonzero() {
        const T l = length();
        if (l == static_cast<T>(0)) { return; }  // Better to check against epsilon tolerance
        const T val = static_cast<T>(1) / l;
        array[0] *= val;
        array[1] *= val;
        array[2] *= val;
    }

    inline vec3<T> getNormalized() const {
        T val = (T) 1.0 / length();