public void rotateVect(Vector3f vec) {
        float vx = vec.x, vy = vec.y, vz = vec.z;

        vec.x = vx * m00 + vy * m01 + vz * m02;
        vec.y = vx * m10 + vy * m11 + vz * m12;
        vec.z = vx * m20 + vy * m21 + vz * m22;
    }
Rotate the specified Vector3f using the rotation component of this 3-D
coordinate transform.

@param vec the Vector3f to rotate (not null, modified)
jme3-core/src/main/java/com/jme3/math/Matrix4f.java