code: public boolean isIntersectingNE(Envelope2D other) {
  		return ((xmin <= other.xmin) ? xmax >= other.xmin : other.xmax >= xmin)
  				&& // check that x projections overlap
  				((ymin <= other.ymin) ? ymax >= other.ymin : other.ymax >= ymin); // check
  																					// that
  																					// y
  																					// projections
  																					// overlap
  	}
docs: Checks if this envelope intersects the other assuming neither one is empty.
  @param other The other envelope.
  @return True if this envelope intersects the other. Assumes this and
  other envelopes are not empty.