Autodesk / Autodesk/revit-ifc

Revit does not show IfcRevolvedAreaSolid with trapezium-area

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C#
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Description

Revit Version: 20.1.1.1 20190731_1515(x64)

Hi, currently my version of Revit does not show a tapered section created by using an IfcRevolvedAreaSolid with a trapezium-shaped area. As far as I (and [others](https://forums.buildingsmart.org/t/display-problem-with-sectioned-spines/2580) ) have checked, the code seems to be correct.

As you can see below, blender for example shows the marked taperd sections.
![image](https://user-images.githubusercontent.com/64948525/81261994-50218400-903d-11ea-8c0f-b4e3f236e5ae.png)

When opening the file in Revit the mentiond sections are missing.

Contributor guide

Open the contributing guide

Research direction

Start by reproducing the missing tapered section in Revit 20.1.1.1 using an IFC file containing an IfcRevolvedAreaSolid with a trapezium-shaped area, and compare it with the Blender result described in the report. Done means the tapered sections are visible in Revit, with the IFC geometry handled consistently with the valid result shown in Blender.

Written by the indexing model from the issue text.

Assessment

Domain
computer-graphics
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
25/100

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