centre method

Coordinate? centre()

Computes the coordinate of the centre of this envelope (as long as it is non-null

@return the centre coordinate of this envelope null if the envelope is null

Implementation

Coordinate? centre() {
  if (isNull()) return null;
  return Coordinate(
      (getMinX() + getMaxX()) / 2.0, (getMinY() + getMaxY()) / 2.0);
}