Integration of BlenderBIM Feaures : FreeCAD Arch/BIM - Native IFC

[paullee]

Realised I only have 6G physical ram, and 6G swap.

When I have Firefox, and run expanding children at some level, the swap memory availability drop and somehow around below 600mB probably, then FC crash (importing ok). Shell window also crash, so it is difficult to screencapture the exact moment FC crash.

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[paullee]

Another interesting finding - trying to import Brunopostile's ninteen-plots-X-X.ifc.

After importing, it is a village of house; then expanding children, the village disappear and become 1 house only

nineteen-plots-X-X.ifc.zip

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[ragohix769]

Realised I only have 6G physical ram, and 6G swap.

When I have Firefox, and run expanding children at some level, the swap memory availability drop and somehow around below 600mB probably, then FC crash (importing ok). Shell window also crash, so it is difficult to screencapture the exact moment FC crash.

So it's a memory problem, as you argued correctly.

[ragohix769]

Another interesting finding - trying to import Brunopostile's ninteen-plots-X-X.ifc.

In my "old" FC 0.21 (no more updated and not on edge so there is the old NativeIFC and the FC 0.21 of one month ago) I opened this file by BrunoPostile, and in memory I can see (via htop) that it uses 10,9 GB, so maybe this is why you have some problem with only 6 GB of ram

[paullee]

Thanks for testing; so yo have expanded Children and get all the shapes of every house right ?

[paullee]

Have tried again

- No Firefox
- Imported ok, seems everything here
- Then, expand Children; seem swap almost used up but not
- ( just note there is something called zram, not much idea what output means though)
- FC do not crash but just after expand is done, only 1 building is left
- Open Firefox (try to report here)
- Then the Terminals crash, as well as FC

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[paullee]

For reference / record purpose:-

1. Found if apply 'Expand Children' to the My Site object 2nd time, all the houses re-appears
2. Increase the physical ram from 6G to 8G, much better, can have FireFox up, and Expand Children to some level without crash... until 'swap ram' become below around 900Mb again
3. On Fedora system, zRam is used, adding conventional disk swap space has no help at all, super slow then when ram runs out

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[yorik]

Interesting! I'll check that file too. It might have particularities regarding sites/buildings...

Note that the importer now has a "Mesh" import mode, which is much faster than the Shape mode. It should take less memory too. The general idea is that the mesh mode is good enough just to view an IFC file, while the shape mode will be needed when working with the geometry. It's possible to also right-click and switch any object between shape and mesh mode.

[paullee]

Great! There are Mesh and Coin mode in the dialog box, what is the difference?

With Mesh mode, there is also in the context menu ( not in Coin mode ) :-
- Transform
- Display Component
- Display Segment

What do they mean for ?

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[paullee]

Behaviour seems unexpected:-

With mesh import, and expand Children result in 1st object / building seems to be Shape (has colours).

Further expand Children result in all objects / buildings in the village shown, these all objects are Mesh (has no colour).


EDIT - And Convert To Shape seems not working.

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