Introduce a GenericBoundingBox similar to other *Generic struct we already have.
So now,
Polyline, PolylineM, PolylineZ, Polygon, PolygonM, PolygonZ, Multipoint
have a bbox() method to get that bbox
Also this makes all the struct members of the shapes private with the exception of Point, PointM, PointZ because it will allow us to change how we implement things & and we don't want the user to mutate the points because the bbox may become 'out of sync'
Introduce a GenericBoundingBox similar to other *Generic struct we already have.
So now, Polyline, PolylineM, PolylineZ, Polygon, PolygonM, PolygonZ, Multipoint have a
bbox()method to get that bboxAlso this makes all the struct members of the shapes private with the exception of Point, PointM, PointZ because it will allow us to change how we implement things & and we don't want the user to mutate the points because the bbox may become 'out of sync'