/// <summary>
/// ersetzt die Polyline in <see cref="DetailMap.Poly"/> durch den Pfad vom Clipping (in MapUnits)
/// </summary>
/// <param name="path"></param>
/// <param name="area"></param>
static void SetClipperPath2Area(ClipperPath path, DetailMap.Poly area)
{
area.Clear();
foreach (var item in path)
{
area.AddPoint(new MapUnitPoint(item.X, item.Y), false);
}
}
/// <summary>
/// "sichere" Flächen erzeugen (ev. aufteilen)
/// </summary>
/// <param name="area"></param>
/// <param name="maxsize">max. "quadratisches" Umgrenzung in MapUnits</param>
/// <returns></returns>
static List <DetailMap.Poly> MakeSafeAreas(DetailMap.Poly area, int maxsize)
{
List <DetailMap.Poly> lst = new List <DetailMap.Poly>();
ClipperPath p = MapUnitPointList2ClipperPath(area.GetMapUnitPoints());
bool counterclockwise = Clipper.Orientation(p);
ClipperPaths newpolys = SplitClipperPath(MapUnitPointList2ClipperPath(area.GetMapUnitPoints()), maxsize);
for (int i = 0; i < newpolys.Count; i++)
{
if (Clipper.Orientation(newpolys[i]) != counterclockwise)
{
newpolys[i].Reverse();
}
}
if (newpolys.Count > 1) // es ist eine Teilung erfolgt
{
foreach (var newpoly in newpolys)
{
DetailMap.Poly newarea = new DetailMap.Poly(area);
newarea.Clear();
foreach (var pt in newpoly)
{
newarea.AddPoint(new MapUnitPoint((int)pt.X, (int)pt.Y), false);
}
lst.Add(newarea);
}
}
else
{
lst.Add(area);
}
return(lst);
}