private Point3d?getInnerBoPoint()
{
Point3d?innerP = Utility2d.getPoint("\n请指定内边界内一点:");
if (innerP == null)
{
return(null);
}
return(innerP);
}
public static KeyValuePair <Point3d, Vector2d>?getLeftMost(Point3d innerP, List <Autodesk.AutoCAD.DatabaseServices.Line> ll, PLDictionary plDic)
{
try
{
Point3d? startP = Utility2d.getBoStartPoint(innerP, ll, plDic);
Vector2d?startV = plDic.getStartVector(startP);
if (startV == null)
{
return(null);
}
return(new KeyValuePair <Point3d, Vector2d>(startP.Value, startV.Value));
}
catch (System.Exception ex)
{
}
return(null);
}
//从直线集合中计算外围边界，直线在相交处都是打断的。得出的边界用点列表表示
public static List <Point3d> getOuterBoundaryFromLine(ObjectId[] ids, Point3d?innerP)
{
List <Point3d> ret = null;
try
{
PLDictionary plDic = new PLDictionary();
// Get the current document and database
Document acDoc = Application.DocumentManager.MdiActiveDocument;
Database acCurDb = acDoc.Database;
Editor ed = acDoc.Editor;
// Start a transaction
using (Transaction acTrans = acCurDb.TransactionManager.StartTransaction())
{
// Open the Block table for read
BlockTable acBlkTbl;
acBlkTbl = acTrans.GetObject(acCurDb.BlockTableId,
OpenMode.ForRead) as BlockTable;
// Open the Block table record Model space for write
BlockTableRecord acBlkTblRec;
acBlkTblRec = acTrans.GetObject(acBlkTbl[BlockTableRecord.ModelSpace],
OpenMode.ForWrite) as BlockTableRecord;
List <Autodesk.AutoCAD.DatabaseServices.Line> ll = new List <Autodesk.AutoCAD.DatabaseServices.Line>();
DBObjectCollection acDBObjColl = new DBObjectCollection();
for (int i = 0; i < ids.Length; i++)
{
if (ids[i].ObjectClass != RXClass.GetClass(typeof(Autodesk.AutoCAD.DatabaseServices.Line)))
{
continue;
}
Autodesk.AutoCAD.DatabaseServices.Line line = acTrans.GetObject(ids[i], OpenMode.ForRead) as Autodesk.AutoCAD.DatabaseServices.Line;
ll.Add(line);
}
ll = ll.Distinct(new My.CompareLine()).ToList();// as List<Autodesk.AutoCAD.DatabaseServices.Line>;
plDic.Add(ll);
KeyValuePair <Point3d, Vector2d>?kvp = null;
if (innerP == null)
{
kvp = plDic.getLeftMost();//外部边界起始
}
else
{
//内部边界起始
kvp = Utility2d.getLeftMost(innerP.Value, ll, plDic);
}
if (kvp == null)
{
return(null);
}
Point3d startP = kvp.Value.Key;
Point3d curP = kvp.Value.Key;
Vector2d curV = kvp.Value.Value;
List <Point3d> plist = new List <Point3d>();
plist.Add(curP);
int maxLoopCount = plDic.Count;
while (maxLoopCount-- > 0)
{
Point3d?p = plDic.getMaxAnglePoint(curP, curV);
//ed.DrawVectors()
if (p == null)
{
break;
}
if (p.Value == startP)
{
break;
}
curV = new Vector2d(curP.X - p.Value.X, curP.Y - p.Value.Y);
curP = p.Value;
plist.Add(p.Value);
}
ret = plist;
acTrans.Commit();
}
}
catch (System.Exception ex)
{
}
return(ret);
}