public static HashSet <Point3D> ExternalEdgePoint3Ds(this Face3D face3D, double tolerance = Core.Tolerance.Distance)
{
if (face3D == null)
{
return(null);
}
Face3D face3D_Temp = new Face3D(face3D);
face3D_Temp.Normalize(tolerance);
ISegmentable3D externalEdge = face3D_Temp.GetExternalEdge3D() as ISegmentable3D;
if (externalEdge == null)
{
throw new NotImplementedException();
}
List <Point3D> point3Ds = externalEdge.GetPoints();
if (point3Ds == null)
{
return(null);
}
//Vector3D normal = face3D.GetPlane().Normal;
//if (normal == null)
// return null;
//ISegmentable3D externalEdge = face3D.GetExternalEdge3D() as ISegmentable3D;
//if (externalEdge == null)
// throw new NotImplementedException();
//List<Point3D> point3Ds = externalEdge.GetPoints();
//if (point3Ds == null)
// return null;
//if (!Spatial.Query.Clockwise(point3Ds, normal, Core.Tolerance.Angle, tolerance))
// point3Ds.Reverse();
HashSet <Point3D> result = new HashSet <Point3D>();
if (point3Ds.Count == 0)
{
return(result);
}
for (int i = 0; i < point3Ds.Count; i++)
{
point3Ds[i].Round(tolerance);
result.Add(point3Ds[i]);
}
return(result);
}