public static bool IsHoleReferenced(Entity ent, Transaction tr)
{
if (ent is Polyline2d || ent is Polyline)
{
// 如果不是flag，没有被引用
string cassFlag = CadUtils.GetCassFlag(ent);
if (CassFlagIsland.ToLower() != cassFlag.ToLower())
{
return(false);
}
var groupId = GroupUtils.FindEntityGroupId(tr, ent);
if (!groupId.IsValid)
{
return(false);
}
// 如果不是flag，没有被引用
//ObjectId[] entityIds = GroupUtils.GetGroupedObjects(ent);
//foreach (ObjectId entityId in entityIds)
//{
//}
var realId = ParcelPolygon.FindParcelOfHole(tr, ent);
if (realId.IsNull)
{
return(false);
}
return(true);
}
return(false);
}
public static decimal GetPolygonArea(Transaction tr, Entity entity)
{
var parcelPolygon = new ParcelPolygon(tr, entity as Curve);
return(parcelPolygon.GetArea());
}
public static decimal GetPolygonArea(ObjectId objectId)
{
var parcelPolygon = new ParcelPolygon(objectId);
return(parcelPolygon.GetArea());
}
public static void SelectHoleToRemoveArea()
{
var holeIds = new ObjectId[0];
ObjectId parcelId = ObjectId.Null;
Document document = Application.DocumentManager.MdiActiveDocument;
document.Editor.WriteMessage("\n选择需要扣除面积的孔洞: ");
var result = StartSelectPolyline(false);
if (result.Status != PromptStatus.OK)
{
return;
}
// 洞
if (result.Value.Count >= 1)
{
holeIds = result.Value.GetObjectIds();
}
// 检查地块是否封闭
using (var tr = document.Database.TransactionManager.StartTransaction())
{
foreach (var objectId in holeIds)
{
var curve = tr.GetObject(objectId, OpenMode.ForRead) as Curve;
if (curve != null && !curve.Closed)
{
document.Editor.WriteMessage("\n错误：选择的孔洞不封闭");
return;
}
}
}
// 外边界
Point3d pickedPoint;
if (!SelectPolylineEntity("\n选择要扣除面积的地块界线: ", "\n实体错误", out parcelId, out pickedPoint) ||
parcelId == ObjectId.Null)
{
return;
}
// 检查地块是否封闭
using (var tr = document.Database.TransactionManager.StartTransaction())
{
var curve = tr.GetObject(parcelId, OpenMode.ForRead) as Curve;
if (curve != null && !curve.Closed)
{
document.Editor.WriteMessage("\n错误：选择的地块界线不封闭");
return;
}
}
// 如果地块是合适的
if (parcelId.IsValid && holeIds.Any())
{
foreach (var objectId in holeIds)
{
if (objectId == parcelId)
{
document.Editor.WriteMessage("\n错误：句柄为{0}的孔洞与地块边界相同", objectId.Handle);
return;
}
if (!WithIn(objectId, parcelId))
{
document.Editor.WriteMessage("\n错误：句柄为{0}的孔洞不在地块边界内部", objectId.Handle);
return;
}
}
// 新增孔洞到地块
var parcel = new ParcelPolygon(parcelId);
parcel.AddHoleIds(holeIds);
document.Editor.WriteMessage("\n将{0}个多边形设定为扣除面积的孔洞", holeIds.Count());
}
}
