populated method

@override Polygon populated({ int traverse = 0, bool onBounds = true, PositionScheme scheme = Position.scheme, })

Returns a geometry of the same subtype as this with certain data members populated.

If nothing is populated then this is returned.

If onBounds is true (as by default):

• The bounds in a returned geometry object is ensured to be populated (expect when cannot be calculated, for example in the case of an empty geometry).
• If traverse > 0, then also bounding boxes of child geometry objects of this geometry are populated for child levels indicated by traverse (0: no childs, 1: only direct childs, 2: direct childs and childs of them, ..).

Use scheme to set the position scheme:

• Position.scheme for generic position data (geographic, projected or any other), this is also the default
• Projected.scheme for projected position data
• Geographic.scheme for geographic position data

See also unpopulated.

Implementation

@override
Polygon populated({
  int traverse = 0,
  bool onBounds = true,
  PositionScheme scheme = Position.scheme,
}) {
  if (onBounds) {
    // create a new geometry if bounds was unpopulated or of other scheme
    final b = bounds;
    final empty = rings.isEmpty;
    if ((b == null && !empty) ||
        (b != null && !b.conforming.conformsWith(scheme))) {
      return Polygon(
        rings,
        bounds: empty ? null : exterior?.getBounds(scheme: scheme),
      );
    }
  }
  return this;
}