Topic: SetExtensionDictionaryEntryFilter Method

[It's Alive!]

If you mean Xdata transform, sure

Some Xdata entries are modified in AcDbObject::xDataTransformBy. See this link for the codes
https://help.autodesk.com/view/OARX/2023/ENU/?guid=OARX-RefGuide-AcDbObject__xDataTransformBy_AcGeMatrix3d_

So, if I create an object with these transformable codes, I can read them back later and see how the state has changed.
Why is this useful? Some objects may not store a normal, or a direction and it can be impossible to determine the width, height, or depth once the object is moved or rotated.

Armed with Xdata, you can build a matrix to transform the entity back to its original state to get it’s bounding box

I’m using Python here, but it should be readable

Code - Python: [Select]

1. import traceback
2. from pyrx_imp import Rx
3. from pyrx_imp import Ge
4. from pyrx_imp import Gi
5. from pyrx_imp import Db
6. from pyrx_imp import Ap
7. from pyrx_imp import Ed
8. from pyrx_imp import Gs
9.  
10. def PyRxCmd_doit() -> None:
11.     try:
12.         Db.Core.regApp("MYXD")
13.        
14.         solid = Db.Solid3d()
15.         solid.createBox(2.0,4.0,96.0)
16.        
17.         xd = [(Db.DxfCode.kDxfRegAppName, "MYXD"),
18.               (Db.DxfCode.kDxfXdWorldXCoord, Ge.Point3d(0, 0, 0)),
19.               (Db.DxfCode.kDxfXdWorldXDir, Ge.Vector3d.kXAxis),
20.               (Db.DxfCode.kDxfXdWorldXDir, Ge.Vector3d.kYAxis),
21.               (Db.DxfCode.kDxfXdWorldXDir, Ge.Vector3d.kZAxis)]
22.        
23.         solid.setXData(xd)
24.         print("\nBefore",solid.xData("MYXD"))
25.        
26.         mat = Ge.Matrix3d()
27.        
28.         mat.setCoordSystem(
29.             Ge.Point3d(100,100,100),
30.             Ge.Vector3d.kZAxis,
31.             Ge.Vector3d.kXAxis,
32.             Ge.Vector3d.kYAxis)
33.        
34.         solid.transformBy(mat)
35.         print("\nAfter",solid.xData("MYXD"))
36.        
37.         db = Db.curDb()
38.         db.addToModelspace(solid)
39.  
40.     except Exception as err:
41.         traceback.print_exception(err)
42.  

Before [(1001, 'MYXD'),
(1011, <PyGe.Point3d(0.00000000000000,0.00000000000000,0.00000000000000)>),
(1013, <PyGe.Point3d(1.00000000000000,0.00000000000000,0.00000000000000)>),
(1013, <PyGe.Point3d(0.00000000000000,1.00000000000000,0.00000000000000)>),
(1013, <PyGe.Point3d(0.00000000000000,0.00000000000000,1.00000000000000)>)]

After [(1001, 'MYXD'),
(1011, <PyGe.Point3d(100.00000000000000,100.00000000000000,100.00000000000000)>),
(1013, <PyGe.Point3d(0.00000000000000,0.00000000000000,1.00000000000000)>),
(1013, <PyGe.Point3d(1.00000000000000,0.00000000000000,0.00000000000000)>),
(1013, <PyGe.Point3d(0.00000000000000,1.00000000000000,0.00000000000000)>)]

[It's Alive!]

Here’s a better sample
https://help.autodesk.com/view/ACDLT/2024/ENU/?guid=GUID-3481BF7B-73CB-4FD5-B421-C25BE92C6D56

Code - Python: [Select]

1. def PyRxCmd_doit() -> None:
2.     try:
3.         Db.Core.regApp("MYXD")
4.        
5.         solid = Db.Solid3d()
6.         solid.createBox(2.0,4.0,96.0)
7.        
8.         xd = [(Db.DxfCode.kDxfRegAppName, "MYXD"),
9.               (Db.DxfCode.kDxfXdWorldXCoord, Ge.Point3d(0, 0, 0)),
10.              
11.               (Db.DxfCode.kDxfXdWorldXDir, Ge.Vector3d.kXAxis),
12.               (Db.DxfCode.kDxfXdWorldXDir, Ge.Vector3d.kYAxis),
13.               (Db.DxfCode.kDxfXdWorldXDir, Ge.Vector3d.kZAxis),
14.              
15.               (Db.DxfCode.kDxfXdWorldXDisp,Ge.Vector3d.kXAxis),
16.               (Db.DxfCode.kDxfXdWorldXDisp,Ge.Vector3d.kYAxis),
17.               (Db.DxfCode.kDxfXdWorldXDisp,Ge.Vector3d.kZAxis)]
18.        
19.         solid.setXData(xd)
20.         print("\nBefore",solid.xData("MYXD"))
21.        
22.         mat = Ge.Matrix3d()
23.         mat.setCoordSystem(
24.             Ge.Point3d(100,100,100), #pos
25.             Ge.Vector3d.kZAxis * 2,  #dir + scale
26.             Ge.Vector3d.kXAxis * 2,
27.             Ge.Vector3d.kYAxis * 2)
28.        
29.         solid.transformBy(mat)
30.         print("\nAfter",solid.xData("MYXD"))
31.        
32.         db = Db.curDb()
33.         db.addToModelspace(solid)
34.  
35.     except Exception as err:
36.         traceback.print_exception(err)
37.  

[(1001, 'MYXD'),
(1011, <PyGe.Point3d(0.00000000000000,0.00000000000000,0.00000000000000)>),

(1013, <PyGe.Vector3d(1.00000000000000,0.00000000000000,0.00000000000000)>),
(1013, <PyGe.Vector3d(0.00000000000000,1.00000000000000,0.00000000000000)>),
(1013, <PyGe.Vector3d(0.00000000000000,0.00000000000000,1.00000000000000)>),
 
(1012, <PyGe.Vector3d(1.00000000000000,0.00000000000000,0.00000000000000)>),
(1012, <PyGe.Vector3d(0.00000000000000,1.00000000000000,0.00000000000000)>),
(1012, <PyGe.Vector3d(0.00000000000000,0.00000000000000,1.00000000000000)>)]

After [(1001, 'MYXD'),
(1011, <PyGe.Point3d(100.00000000000000,100.00000000000000,100.00000000000000)>),

(1013, <PyGe.Vector3d(0.00000000000000,0.00000000000000,1.00000000000000)>),
(1013, <PyGe.Vector3d(1.00000000000000,0.00000000000000,0.00000000000000)>),
(1013, <PyGe.Vector3d(0.00000000000000,1.00000000000000,0.00000000000000)>),

(1012, <PyGe.Vector3d(0.00000000000000,0.00000000000000,2.00000000000000)>),
(1012, <PyGe.Vector3d(2.00000000000000,0.00000000000000,0.00000000000000)>),
(1012, <PyGe.Vector3d(0.00000000000000,2.00000000000000,0.00000000000000)>)]

I just changed the python wrappers to return the correct type, pretty sure .NET returns points instead of vectors

[Augusto]

Thanks for the answer with examples. It was very clear to me.