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A .NET library to work with data in the IFC format. This is the core component of the Xbim Toolkit

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I want to use XbimGeometryEngine to create solids for many entities, so I will use Parallel.ForEach to improve performance. In earch Parallel.ForEach loop, it will use IXbimGeometryEngine.CreateXXX to create IXbimSolid,...

I get an validation error by xBIM on IfcShapeRepresentation with RepresentationIdentifier='SolidModel' containing boolean operations. #### Assemblies and versions affected: Xbim.Essentials 5.1.341 (and earlier) #### Steps (or code) to reproduce the...

XBim have “IfcStore.AddModelReference” API,but where is the "Remove ModelReference" API ?

Hello, xBim team! I'm getting geometry for a model using this code ``` m_3DMdlContext = new Xbim3DModelContext(m_model); m_3DMdlContext.MaxThreads = 1; m_3DMdlContext.CreateContext(); m_ShapeInsts = m_3DMdlContext.ShapeInstances().ToList(); ``` This way generates ShapeInstances for...

Hello everyone, We have 2 IFC files with minor changes with time, the first model is built in 2020 but after a while, we have a core test in a...

If you open the attached file in XBimXplorer 4.0, no geometry is displayed at all. Using XBimXplorer 5.1 very few IFC elements are displayed. ![image](https://github.com/xBimTeam/XbimEssentials/assets/1231891/7cffae81-4ec3-40a8-ab4c-484bf5c571d4) The file contains IFCWALL's which...

Hello everyone, I'm currently stuck with an engineering question about the IFC. I would like to get the normal vector pointing outwards of IfcBuildingElements (see image below). The normal vector...

Hello, xBim team! I got this validation error `IfcBuilding '{label}' has null IIfcSite (invalid parent){}` while analizing IFC file, created with xBim. But BimVision shows project hierarchy correctly. Building is...

I attempted to generate a solid object by following a designated path while utilizing a profile of my choosing. The build completed successfully without any errors. But I am unable...

Hi, everyone. XbimP21StringDecoder.cs provides a string decoder for IFC. If I want to write some words with string encoding using Xbim, is there some existed classes could be used for...