public static IEnumerable <List <CPoint> > GetIpgInteriorCptLtEb(IPolygon4 ipg)
{
//ipg.Close();
if (ipg.ExteriorRingCount != 1)
{
throw new ArgumentException(
"I have not considered such a complicated case! A hole contains other holes! ");
}
IRing2 pExteriorRing = (ipg.ExteriorRingBag as IGeometryCollection).get_Geometry(0) as IRing2;
IGeometryCollection pGeoColInteriorRing = (IGeometryCollection)ipg.get_InteriorRingBag(pExteriorRing);
for (int i = 0; i < pGeoColInteriorRing.GeometryCount; i++)
{
yield return(GetCptEbByICol(pGeoColInteriorRing.get_Geometry(i) as IPointCollection4).ToList());
}
}
//static int intCount = 0;
/// <summary>
/// 通过面要素(IPolygon4)获取点数组
/// </summary>
/// <param name="ipg">面要素</param>
/// <returns>点数组</returns>
/// <remarks>currently, we assume that there is only one exterior ring for ipg</remarks>
public static IEnumerable <CPoint> GetIpgExteriorCptLt(IPolygon4 ipg)
{
//ipg.Close();
IRing2 pExteriorRing = (ipg.ExteriorRingBag as IGeometryCollection).get_Geometry(0) as IRing2;
var cptlt = GetCptEbByICol(pExteriorRing as IPointCollection4).ToList();
if (ipg.ExteriorRingCount != 1)
{
var x1 = cptlt[0].X;
var y1 = cptlt[0].Y;
//var x = pCol.Point[0].X;
//var y = pCol.Point[0].Y;
throw new ArgumentException(
"I have not considered such a complicated case! A hole contains other holes! ");
}
return(cptlt);
}
