/// <summary>
/// 用polygon2d收集点集是为了，删除异常点（单根线端点，共线点）
/// </summary>
public static Polygon2d ToPolygon2d(this Path path)
{
Polygon2d polygon2d = new Polygon2d(path.ToVector2ds());
polygon2d = polygon2d.DelDuplicate();
return(polygon2d.RemoveSharpCcorners());
}
public static CurveLoop ToCurveLoop(this Polygon2d _polygon2d)
{
_polygon2d = _polygon2d.DelDuplicate();
List <Line> lines = new List <Line>();
foreach (var seg in _polygon2d.SegmentItr())
{
lines.Add(seg.ToLine());
}
CurveLoop curves = new CurveLoop();
foreach (Line line in lines)
{
Curve _c = line as Curve;
curves.Append(_c);
}
return(curves);
}
