IFC export

[cadgiru]

OS: Windows 10 (10.0)
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.19.22164 (Git)
Build type: Release
Branch: master
Hash: f2a9f712e8d68ee2393d0fe748c02096c4148a32
Python version: 3.8.5
Qt version: 5.12.5
Coin version: 4.0.0
OCC version: 7.4.0
Locale: English/United States (en_US)

Probably something Basic I do wrong?

When Exporting to IFC, objects 'Jump'

fc01.jpg (391.23 KiB) Viewed 2932 times

Imported in Blender (BlenderBim) (same result in other ifc viewers:

fc02.jpg (133.31 KiB) Viewed 2932 times

Freecad File attached

[bernd]

I can confirm the problem. In most cases the following export preference helps: "Force export as Brep". but it does not here.

What helped is to use Part --> simple copy to make a copy of all objects. Means something inside the arch objects seams wrong.

Screenshot_20200823_205538.png (444.29 KiB) Viewed 2888 times

[bernd]

attached a file only consisting of two objects. In IfcPlusPlus something is wrong.

structure_ifcexport_problem_01.FCStd

(12.75 KiB) Downloaded 110 times

structure_ifcexport_problem_01.ifc

(4.44 KiB) Downloaded 101 times

Screenshot_20200823_211156.png (352.4 KiB) Viewed 2884 times

[bernd]

BTW: if the ifc is reimported in FreeCAD both are correct imported.

[cadgiru]

Thx
BTW tried recompute on all beams... different, but not desired result

fc03.jpg (82.35 KiB) Viewed 2865 times

BTW 2
Is there a way to define objects in general, in this case Structure/ifcBeam so that it will export to ifc4 with quantities From FreeCAD?

fc04.jpg (142.43 KiB) Viewed 2857 times

Imported to BlenderBIM, looks correct, but no base QTY.
When ticking the boxes in BlenderBIM, we get 'guess' the above data

fc05.jpg (32.43 KiB) Viewed 2857 times

Importing structure_ifcexport_problem_01.ifc in BimSync, no Base QTY show up

If applying Base Qty in BlenderBIM, then exporting, they will


Will try to document this somewhere

[cadgiru]

What is the correct way to copy a structure object, preserving location ?

[bernd]

how did you do it? Can you reproduce the problem in a step by step follow up.

Somehow there some issue with it. But I can not find it. As soon as a simple copy or another structure is made the problem is gone.

[cadgiru]

Will try to
Trying to replicate verbally:

• Create Structure object as Beam
• Move / rotate to correct location
• No recompute after move (Maybe source of problem)
• Copy using Move without having performed a recalculate on original

Will try to replicate in model later.

[bernd]

for me it seams to be a viewerproblem ...

ifc exported from the file provided in the first post ...

only blender does not show the objects.

screens follow ...

DhFundament.ifc

(40.27 KiB) Downloaded 88 times

[bernd]

blender.PNG (589.78 KiB) Viewed 2712 times

collab.PNG (198.01 KiB) Viewed 2712 times

fc.PNG (209.6 KiB) Viewed 2712 times

ifcosweb.PNG (241.07 KiB) Viewed 2712 times