cropOutsideWay method

Wayholder? cropOutsideWay(Wayholder wayholder, BoundingBox boundingBox)

An alternative cropping method that reduces the nodes of a way that are outside the given boundingBox.

This is a less aggressive optimization than cropWay and is used in specific scenarios.

Implementation

/// outside the given [boundingBox].
  ///
  /// This is a less aggressive optimization than [cropWay] and is used in
  /// specific scenarios.
  Wayholder? cropOutsideWay(Wayholder wayholder, BoundingBox boundingBox) {
List<Waypath> inner = wayholder.innerRead.map((test) => Waypath(path: _reduceOutside(test, boundingBox))).toList()
  ..removeWhere((Waypath test) => test.isEmpty);
List<Waypath> closedOuters = wayholder.closedOutersRead.map((test) => Waypath(path: _reduceOutside(test, boundingBox))).toList()
  ..removeWhere((Waypath test) => test.isEmpty);
List<Waypath> openOuters = wayholder.openOutersRead.map((test) => Waypath(path: _reduceOutside(test, boundingBox))).toList()
  ..removeWhere((Waypath test) => test.isEmpty);

if (inner.isEmpty && closedOuters.isEmpty && openOuters.isEmpty) return null;

if (closedOuters.isEmpty && openOuters.isEmpty) {
  // only inner is set, move the first inner to the respective outer
  Waypath waypath = inner.first;
  inner.remove(waypath);
  if (waypath.isClosedWay()) {
    closedOuters.add(waypath);
  } else {
    openOuters.add(waypath);
  }
}

// return a new wayholder instance
Wayholder? result = wayholder.cloneWith(inner: inner, closedOuters: closedOuters, openOuters: openOuters);
return result;
  }