code: public Vector3d positiveY(Vector3d dir) {
          dir.x = m12 * m20 - m10 * m22;
          dir.y = m00 * m22 - m02 * m20;
          dir.z = m02 * m10 - m00 * m12;
          return dir.normalize(dir);
      }
docs: /* (non-Javadoc)
  @see org.joml.Matrix3dc#positiveY(org.joml.Vector3d)