Build object using multiple sublabels -- TNaming_Tool

David Jorge
Wed, 06/11/2003 - 21:05

Forums:

Hi cascade users,

suppose i have a TDF tree like:

I want my Final Object to be constructed from the sublabels NammingShapes TopFace,...,BackFace. i want to able to modify only one of the faces, and reconstruct the final object latter from the sublabels TopFace,....,BackFace.
Is there a way to do that?

i think i need TNaming_Tool tool, but the manual's is not clear to me.
Could someone give me an example using TNaming_Tool?

Shawn Yang
Thu, 06/12/2003 - 07:48

Hi:
I think the "TNaming_Tool" that can let you retrieve back the shape that has been stored in the OCAF. The sample is as following:

Handle(TNaming_NamedShape) TNS;
FinalObjectLabel.FindAttribute(TNaming_NamedShape::GetID(),TNS);

TopoDS_Shape aShape=TNaming_Tool::GetShape(TNS);
....

After you get new shape, you have to modify the shape back to the FinalObjectLabel in the OCAF.

TNaming_Builder B(FinalObjectLabel);
B.Modify( aShape, aNewShape);

Then, give the "display" function, again. That will be change the shape on the screen. If you need.

Wish it can help you.

Shawn

David Jorge
Fri, 06/13/2003 - 14:47

Thanks shawn,
this is my first attempt to work with TNamming_Tool package. And what if my finalobjectLabel is empty? it's mandatory have a nammedShape in the finalObjectLabel? I don't know if my question has any sense!

Can you give-me a more detailed example to better understand how TNamming_Builder works?

My goal it's to have the finalobject faces on the sublevel's (of the finalobjec). i'd like to treat a face independently of the the other faces, so i
can apply modifications to only one face. After doing the modification to the face, i want to reconstruct the object.

I don't know if this is the better way to do!

Joyice (not verified)
Tue, 06/17/2003 - 05:21

Hi maybe you can ref. http://www.opencascade.com/community/forum/thread_3065/

Shawn Yang
Tue, 06/17/2003 - 09:10

Hi:
Handle(TNaming_NamedShape) TNS;
if (FinalObjectLabel.FindAttribute(TNaming_NamedShape::GetID(),TNS))

{ //The shape is existing in FinalObjectLabel
TopoDS_Shape aShape=TNaming_Tool::GetShape(TNS);
if (!aShape.IsNull())
{..... //Do Modify shape
}
}
else
{
.....//Set the TNaming_NamedShape attribute
}

Wish it help.

Shawn

David Jorge
Fri, 06/27/2003 - 19:00

Shawn, im my code i'm changing the shape back to the FinalObjectLabel with:

TNaming_Builder B(FinalObjectLabel);
B.Replace( aShape, aNewShape);

and it works fine (my namedShape is updated).

What's the diference between using ::Replace and ::Modify methods of TNaming_Builder?

Thanks in advance,
David Jorge