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Autodesk / revit-ifc

IFC for Revit and Navisworks (2019+)
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Circular openings in slanted slabs export as hexagons in IFC4 RV Arch #561

Open andydandy74 opened 1 year ago

andydandy74 commented 1 year ago

Openings with curved edges in slanted slabs are grossly simplified in IFC 4 RV Arch. (IFC2x3 CV 2.0 is fine): grafik

grafik

AngelVelezSosa commented 1 year ago

A hexagon does seem on the simpler side ... we will look into why the tessellation is so coarse. @parrela, please file this also.

andydandy74 commented 1 year ago

Here's a model. Happens with floor slabs and foundation slabs. Roofs and ceilings work fine. 115_IFC_CircularSlabOpeningsExportAsHexagons.zip

YasmineArcadis commented 1 year ago

Not sure if this is completely relevant, so if not just ignore this, but we also tested whether the opening is exported as an IfcOpening and this isn't the case for every kind of 'void' or 'opening' you make in Revit. I have some pictures below showing depending on which type of 'opening' you create (i.e. vertical opening/edit footprint/void family/...) whether it gets exported to an IfcOpening or not (all test were done with Revit 2022.1.3 and exporter 22.5.0.0.): v = checked '-' = not applicable x = no IfcOpening ! = solved in Revit 2023 2022-12-08 The purple ones are the IfcOpenings Picture1

andydandy74 commented 1 year ago

@YasmineArcadis Awesome work! We've had an internal issue for this, too, that I meant to post here, but hadn't finished my testing yet. Our preliminary tests also showed that no IfcOpening entities were created for openings in beams, columns, structural columns or foundations (not sure about foundation slabs).

I would suggest you create a separate issue for this so it gets the attention it deserves.

What also bugs me is the inconsistent naming of IfcOpening profile names (but that would be yet another issue).

AngelVelezSosa commented 1 year ago

@YasmineArcadis do you have that Revit file?

YasmineArcadis commented 1 year ago

BPL-000_MOD_Empty Template Openings.zip This is the RVT file (2022)

parrela commented 1 year ago

OK, thank you @YasmineArcadis for that comprehensive document! In Dev-2024 I only see two cases where openings become hexagons: when the floor is edited. So I will file that to get looked at. I will also file an item for IfcOpening elements that should be created.

JOuellette-Autodesk commented 1 year ago

https://jira.autodesk.com/browse/REVIT-200695

andydandy74 commented 7 months ago

Solved for floor slabs in 24.2. Still an issue for foundation slabs.

grafik