DingiPolygon


@interface DingiPolygon : DingiMultiPoint <DingiOverlay>

An DingiPolygon object represents a closed shape consisting of four or more vertices, specified as CLLocationCoordinate2D instances, and the edges that connect them. For example, you could use a polygon shape to represent a building, a lake, or an area you want to highlight.

You can add polygon shapes to the map by adding them to an DingiShapeSource object. Configure the appearance of an DingiShapeSource’s or DingiVectorTileSource’s polygons collectively using an DingiFillStyleLayer or DingiSymbolStyleLayer object. To access a polygon’s attributes, use an DingiPolygonFeature object.

Alternatively, you can add a polygon overlay directly to a map view using the -[DingiMapView addAnnotation:] or -[DingiMapView addOverlay:] method. Configure a polygon overlay’s appearance using -[DingiMapViewDelegate mapView:strokeColorForShapeAnnotation:] and -[DingiMapViewDelegate mapView:fillColorForPolygonAnnotation:].

The vertices are automatically connected in the order in which you provide them. You should close the polygon by specifying the same CLLocationCoordinate2D as the first and last vertices; otherwise, the polygon’s fill may not cover the area you expect it to. To avoid filling the space within the shape, give the polygon a transparent fill or use an DingiPolyline object.

A polygon may have one or more interior polygons, or holes, that you specify as DingiPolygon objects with the +polygonWithCoordinates:count:interiorPolygons: method. For example, if a polygon represents a lake, it could exclude an island within the lake using an interior polygon. Interior polygons may not themselves have interior polygons. To represent a shape that includes a polygon within a hole or, more generally, to group multiple polygons together in one shape, use an DingiMultiPolygon or DingiShapeCollection object.

To make the polygon straddle the antimeridian, specify some longitudes less than −180 degrees or greater than 180 degrees.

interiorPolygons
The array of polygons nested inside the receiver.

The area occupied by any interior polygons is excluded from the overall shape. Interior polygons should not overlap. An interior polygon should not have interior polygons of its own.

If there are no interior polygons, the value of this property is nil.
Declaration
Objective-C

@property (readonly, nonatomic, nullable) NSArray<DingiPolygon *> *interiorPolygons;
Swift

var interiorPolygons: [DingiPolygon]? { get }


                    
                    
                    +polygonWithCoordinates:count:

Creates and returns an DingiPolygon object from the specified set of coordinates.

Declaration

Objective-C

+ (nonnull instancetype)polygonWithCoordinates:
                            (nonnull const CLLocationCoordinate2D *)coords
                                         count:(NSUInteger)count;

Swift

convenience init(coordinates coords: UnsafePointer<CLLocationCoordinate2D>, count: UInt)

Parameters

`coords`	The array of coordinates defining the shape. The data in this array is copied to the new object.
`count`	The number of items in the `coords` array.

Return Value

A new polygon object.


                    
                    
                    +polygonWithCoordinates:count:interiorPolygons:

Creates and returns an DingiPolygon object from the specified set of coordinates and interior polygons.