public static IEnumerable <Polygon2d> Union(this Box2d b0, Box2d b1)
{
Polygon2d p0 = new Polygon2d(b0.ComputeCornersCCW());
Polygon2d p1 = new Polygon2d(b1.ComputeCornersCCW());
return(p0.Union(p1));
}
/// <summary>
/// Gets oriented bounding box of this polygon
/// </summary>
public static Polygon2d ComputeOrientedBoundingBox(this Polygon2d polygon)
{
var rot = polygon.ComputeMinAreaEnclosingBoxRotation();
var rotInv = rot.Transposed;
var bbGlobal = new Box2d(polygon.Points.Select(p => rot * p));
return(new Polygon2d(bbGlobal.ComputeCornersCCW().Apply(p => rotInv * p)));
}