Autodesk / Autodesk/revit-ifc

IFC Shared Parameters-RevitIFCBuiltIn*.txt: wrong Parameter Type for PanelWidth

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#199 3 comments 0 reactions 0 assignees View on GitHub
parameters-properties Triage
Dominant language
C#
Stars
637
Forks
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PR merge metrics
No merged PRs in 30d

Description

I was experimenting with an IfcDoor and wanted to get the optional Property **PanelWidth** correct in Ifc.

I think this Property should be a IfcNormalizedRatioMeasure (NUMBER)
instead of IfcPositiveLengthMeasure (LENGTH).

https://standards.buildingsmart.org/IFC/RELEASE/IFC2x3/TC1/HTML/ifcsharedbldgelements/lexical/ifcdoorpanelproperties.htm

When I enter the actual PanelWidth (930mm) the Ifc Property will become 1.
When I enter the ratio (0.5) the Ifc Property will become 0.00164.
Since it's a double door, the ratio should be 0.5.
(Or more precise: 0.468 taking in account LiningThickness.)

Not sure who actually uses this Property for it's 'ratio-purposes' but it's available so it should be correct right?

Contributor guide

Open the contributing guide

Research direction

Start with the IFC Shared Parameters-RevitIFCBuiltIn*.txt file and compare the PanelWidth definition with the IFC2x3 IfcDoorPanelProperties reference linked in the issue. Trace how the parameter type is interpreted during export, then verify that a double-door ratio such as 0.5 is preserved as a normalized ratio rather than converted from a length.

Written by the indexing model from the issue text.

Assessment

Tech stack
csharp
Domain
tooling
Issue type
Bug
Difficulty
3/5
Estimated time
1-2 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
45/100

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