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I had very large a STEP file(64MB) to be loaded to a TopoDS shape and the loading took more than 6 hours.
Anything I can do to improve it?
The code I used:
Archived image: external image
Discussion
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64mb is not big. 700mb takes about 3-5min usually.
OCCT have a issue when your model is kinda created from planar polygons (thousands of faces inside shell). In that case it will takes a lot time. Is it your case? If yes - i can suggest a workaround while we are preparing fix (will takes a few months). Or if it is not your case - then we need to have a file from your to analyze.
Also, please share the OCCT version used for your import process.
Best regards, Commenter-1.
Thank you for the elaboration.
I'm not sure which case it is, as the file was from a client who is not likely to know it either.
Could you please help analyse the file attached?
Also, the OCCT version is 7.9.1.
Best regards, Author
Yes, it is a case, when model have thousands faces inside single close shell. Please apply parameters from that thread and disable the healing of order of faces inside shell.
Link: STeP Importer stuck and hogging memory - Forum Open Cascade Technology
Best regards, Commenter-1.
Hi Dmitrii,
Thank you for identifying the problem!
I read the thread you mentioned.
It's a bit long and has something I don't quite understand.
So I write down my thoughts here. Please correct me if I get anything wrong.
The loading problem is caused by OCCT trying "FixShellOrientationMode", so I think I should disable it as a workaround.
Since 7.9.0, the shape healing parameters are available in DE Interface. So I changed my code like this:
Archived image: external image
However, it seems not to work. The loading is still stuck at "TransferRoots()".
Did I miss anything import here?
Best regards, Author
It looks as valid usage. I need to check locally, my apologies. Will check during current week.
Best regards, Commenter-1.
Hello Dmitrii,
Any news about the problem?
Best regards,
Author
Hello. Your file have another issue, resolving of which is not done and not yet prioritized.
As for an old issue with stack with huge number of faces per shell - it is waiting for integration now, fixed:Shape Healing - Optimize FixFaceOrientation
As for your fix, could you please create a GH issue with file attached? If issue is critical for you and need to be solved in some near time, please reference to "Bug fixing and correction" commercial request: Custom Software Development & Services - OCCT3D
Best regards, Commenter-1.