code: public long gridDistance(int x, int y, int z, int w) {
          return Math.abs(x - x()) + Math.abs(y - y()) + Math.abs(z - z()) + Math.abs(w - w());
      }
docs: /* (non-Javadoc)
  @see org.joml.Vector4ic#distanceSquared(int, int, int, int)