Archived discussion

I could not read advanced_brep_shape_representation's name from step files

Data Exchange and Application FrameworkFri, 07/12/2024 - 10:415 replies

QuestionAuthorFri, 07/12/2024 - 10:41

I have a step file with many parts in it. These parts have names, as shown in Figure 1, stored in the advanced_brep_shape_representation.
But I don't know how to get the names. I used the CAD Assistant to read this file, and the result is shown in Figure 2. The CAD Assistant also couldn't read its name correctly.
The effect I want is to read its name correctly, as shown in Figure 3. Or just read the names and output them in the console.
I really need help.

Discussion

5 archived replies

Posts are displayed in their archived order.

01Commenter-1Fri, 07/12/2024 - 11:10

Hello, extracting names from Step model(Advanced face and other, not assembly entities) into XCAF are not implemented.

You can do that by yourself, after reading XCAF. Please check the source: https://github.com/Open-Cascade-SAS/OCCT/blob/f39f9838e43879ca3a1582de71...

You need to iterate and found your step entities, extract their shape and then find a shape label. StepSession is available from WS.

Feature to extract names is already interested by community. It will be helpfull, if you write your suggesting in the next survey: Shape the Future of OCCT! Your Opinion Matters! - Forum Open Cascade Technology

Best regards, Commenter-1.

02AuthorFri, 07/12/2024 - 11:58

Thank you Very much, Dmitrii. I am trying to do that like you said. Before I succeed, I must first express my thanks to you.(Maybe I will get some new problems haha)
Best regards, Li.

03Commenter-1Fri, 07/12/2024 - 12:22

You are free to consult with your prepared sample. I can review your code. So, if you will have any problems, welcome.

Best regards, Commenter-1.

04Commenter-2Fri, 07/19/2024 - 09:50

Did you finished this project，I need to fix this also

05Commenter-1Sun, 07/21/2024 - 10:15

Extracting name as an attribute: https://dev.opencascade.org/node/84287#comment-23931 and https://dev.opencascade.org/node/84499#comment-24468

Previously I share where code be inserted to put information into XCAF. Additionally in Read name method you can found search shape by entity.

As for a common approach from OCCT side, extracting name from sub-shapes is very expensive task from performance side :(

Best regards, Commenter-1.