Topic: boolean operation with newly created entity

[danadrian.baluta@yahoo.co]

Hi

I'm trying to create a box and intersect it with an existing entity.

I don't know how to select the box as a solid3d, so that i can pas it to the boolean operation.

I tried Editor.SelecLast, but it doesn't return Solid3d.

Please help me!

Thank you!

Here's the code:

Code - C#: [Select]

1. // start creating box
2.                         using (Transaction createBoxTrans = database.TransactionManager.StartTransaction())
3.                         {
4.                             BlockTable acBlkTbl;
5.                             acBlkTbl = createBoxTrans.GetObject(database.BlockTableId, OpenMode.ForRead) as BlockTable;
6.                             BlockTableRecord acBlkTblRec;
7.                             acBlkTblRec = createBoxTrans.GetObject(acBlkTbl[BlockTableRecord.ModelSpace], OpenMode.ForWrite) as BlockTableRecord;
8.                             using (Solid3d myBox = new Solid3d())
9.                             {
10.                                 myBox.CreateBox(250, 250, 800);
11.                                 myBox.TransformBy(Matrix3d.Displacement(new Point3d(100, 100, 0) - Point3d.Origin));
12.                                 acBlkTblRec.AppendEntity(myBox);
13.                                 createBoxTrans.AddNewlyCreatedDBObject(myBox, true);
14.                             }
15.                             createBoxTrans.Commit();
16.                         }
17.                         // end creating box
18. entity.BooleanOperation(BooleanOperationType.BoolIntersect, ed.SelectLast);
19.  

[gile]

Hi you do not show where 'entity' come from, but it would be opened in a transaction (opened with or add to this transaction). so, you should create the box using the same transaction so that you can simply do:

Code - C#: [Select]

1. entity.BooleanOperation(BooleanOperationType.BoolIntersect, myBox);

[danadrian.baluta@yahoo.co]

Thank you for the answer!
I didn't know if i can use the box before the creation transaction was closed.
I made the change as per your comment.
Now i can't create the box because i get a message saying 'eLockViolation' when i try to open the block table record for write.
I open an existing drawing and try to loop through all it's entities.

Thank you for the help!

Code - C#: [Select]

1. DocumentCollection acDocMgr = Autodesk.AutoCAD.ApplicationServices.Core.Application.DocumentManager;
2.  
3.             int ct = 0;//cycle through quarters
4.             int ct1 = 0;//cycle thorugh 16th
5.             string file = cale + deTaiat + "\\" + deTaiat+"_"+quarter[0]+"_SOLID.dwg";
6.             if (File.Exists(file))
7.             {
8.                 Document almeu = acDocMgr.Open(file, false);
9.                 acDocMgr.MdiActiveDocument = almeu;
10.                 string drName = Path.GetFileName(almeu.Name);
11.             }
12.             else
13.             {
14.                 acDocMgr.MdiActiveDocument.Editor.WriteMessage("File " + file+" does not exist.");
15.             }
16.            
17.             Document doc = Autodesk.AutoCAD.ApplicationServices.Core.Application.DocumentManager.MdiActiveDocument;
18.             string drawingName = Path.GetFileName(doc.Name);
19.             Editor ed = acDocMgr.MdiActiveDocument.Editor;
20.             ed.WriteMessage(drawingName);
21.             Database database = HostApplicationServices.WorkingDatabase;
22.             using (Transaction transaction = database.TransactionManager.StartTransaction())
23.             {
24.                 Point3d tileMin = new Point3d(grandOffset.X+bigOffset[ct].X+smallOffset[ct1].X, grandOffset.Y + bigOffset[ct].Y + smallOffset[ct1].Y, 0.0);
25.                 Point3d tileMax = new Point3d(grandOffset.X + bigOffset[ct].X + smallOffset[ct1].X+250.0, grandOffset.Y + bigOffset[ct].Y + smallOffset[ct1].Y+250.0, 1000.0);
26.  
27.                 BlockTableRecord btRecord = (BlockTableRecord)transaction.GetObject(SymbolUtilityServices.GetBlockModelSpaceId(database), OpenMode.ForWrite);
28.                 foreach (ObjectId id in btRecord)
29.                 {
30.  
31.                     Solid3d entity = (Solid3d)transaction.GetObject(id, OpenMode.ForWrite);
32.                     ObjectId intityId = entity.ObjectId;
33.                     Extents3d ext = entity.GeometricExtents;
34.  
35.                     ////////// if entity intersects OS box, then create box and do boolean
36.                     if (((ext.MinPoint.X<tileMin.X)&& (ext.MaxPoint.X < tileMin.X))||
37.                         ((ext.MinPoint.X > tileMax.X) && (ext.MaxPoint.X > tileMax.X)) ||
38.                         ((ext.MinPoint.Y < tileMin.Y) && (ext.MaxPoint.Y < tileMin.Y)) ||
39.                         ((ext.MinPoint.Y > tileMax.Y) && (ext.MaxPoint.Y > tileMax.Y)))//if outside
40.                     {
41.                         //delete entity
42.                     }
43.                     else if (!((ext.MinPoint.X>tileMin.X)&&(ext.MinPoint.Y>tileMin.Y)&&
44.                         (ext.MaxPoint.X < tileMax.X) && (ext.MaxPoint.Y < tileMax.Y)))//else if not completely inside
45.                         {
46.                         // start creating box
47.                         using (Transaction createBoxTrans = database.TransactionManager.StartTransaction())
48.                         {
49.                             Database db = HostApplicationServices.WorkingDatabase;
50.                             BlockTable acBlkTbl;
51.                             acBlkTbl = createBoxTrans.GetObject(db.BlockTableId, OpenMode.ForWrite) as BlockTable;
52.                             BlockTableRecord acBlkTblRec;
53.                             acBlkTblRec = createBoxTrans.GetObject(acBlkTbl[BlockTableRecord.ModelSpace], OpenMode.ForWrite) as BlockTableRecord;
54.                             using (Solid3d myBox = new Solid3d())
55.                             {
56.                                 myBox.CreateBox(250, 250, 800);
57.                                 myBox.TransformBy(Matrix3d.Displacement(new Point3d(100, 100, 0) - Point3d.Origin));
58.                                 acBlkTblRec.AppendEntity(myBox);
59.                                 createBoxTrans.AddNewlyCreatedDBObject(myBox, true);
60.                                 entity.BooleanOperation(BooleanOperationType.BoolIntersect, myBox);
61.                             }
62.                             createBoxTrans.Commit();
63.                         }
64.                         // end creating box
65.                     }
66.                 }
67.  
68.                 transaction.Commit();
69.             }
70.  

[gile]

I replied you there.