Method length2

jni/venus/vec4.h:99–99

	friend bool fuzzyEqual(const vec4<T>& lhs, const vec4<T>& rhs) { return lhs == rhs; }

	T length2() const { return x*x + y*y + z*z + w*w; }
	T length() const { return std::sqrt(x*x + y*y + z*z + w*w); }
	void normalize() { *this /= length(); }