AccessViolationException Cutting XbimSolid

[andyward]

Model crashes when creating 3DModelContext. See stack trace

Assemblies and versions affected:

Geometry v5.0.118

Minimal file to reproduce the issue:

FKA_ARCH_PODIUM_IFC(EDITED) PROBLEMATIC ELEMENTS ONLY.ifc as provided privately by BT

Application: IfcConverterApplication.exe Framework Version: v4.0.30319 Description: The process was terminated due to an unhandled exception. Exception Info: System.AccessViolationException at <Module>.ShapeUpgrade_UnifySameDomain.Build(ShapeUpgrade_UnifySameDomain*) at Xbim.Geometry.XbimSolid.Cut(Xbim.Common.Geometry.IXbimSolid, Double) at Xbim.Geometry.XbimSolid.Init(Xbim.Ifc4.Interfaces.IIfcBooleanResult) at Xbim.Geometry.XbimSolid.Init(Xbim.Ifc4.Interfaces.IIfcBooleanOperand) at Xbim.Geometry.XbimSolid..ctor(Xbim.Ifc4.Interfaces.IIfcBooleanOperand) at Xbim.Geometry.XbimSolid.Init(Xbim.Ifc4.Interfaces.IIfcBooleanResult) at Xbim.Geometry.XbimSolid.Init(Xbim.Ifc4.Interfaces.IIfcBooleanOperand) at Xbim.Geometry.XbimSolid..ctor(Xbim.Ifc4.Interfaces.IIfcBooleanOperand) at Xbim.Geometry.XbimSolidSet.Init(Xbim.Ifc4.Interfaces.IIfcBooleanResult) at Xbim.Geometry.XbimSolidSet..ctor(Xbim.Ifc4.Interfaces.IIfcBooleanResult) at Xbim.Geometry.XbimGeometryCreator.Create(Xbim.Ifc4.Interfaces.IIfcGeometricRepresentationItem, Xbim.Ifc4.Interfaces.IIfcAxis2Placement3D) at Xbim.Geometry.Engine.Interop.XbimGeometryEngine.Create(Xbim.Ifc4.Interfaces.IIfcGeometricRepresentationItem, Xbim.Ifc4.Interfaces.IIfcAxis2Placement3D) at Xbim.ModelGeometry.Scene.Xbim3DModelContext+<>c__DisplayClass28.<WriteShapeGeometries>b__27(Int32) at System.Threading.Tasks.Parallel+<>c__DisplayClass42_02[[System.Int32, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089],[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]].<PartitionerForEachWorker>b__1() at System.Threading.Tasks.Task.InnerInvoke() at System.Threading.Tasks.Task.InnerInvokeWithArg(System.Threading.Tasks.Task) at System.Threading.Tasks.Task+<>c__DisplayClass176_0.<ExecuteSelfReplicating>b__0(System.Object) at System.Threading.Tasks.Task.InnerInvoke() at System.Threading.Tasks.Task.Execute() at System.Threading.Tasks.Task.ExecutionContextCallback(System.Object) at System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object, Boolean) at System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object, Boolean) at System.Threading.Tasks.Task.ExecuteWithThreadLocal(System.Threading.Tasks.Task ByRef) at System.Threading.Tasks.Task.ExecuteEntry(Boolean) at System.Threading.Tasks.Task.System.Threading.IThreadPoolWorkItem.ExecuteWorkItem() at System.Threading.ThreadPoolWorkQueue.Dispatch() at System.Threading._ThreadPoolWaitCallback.PerformWaitCallback()

[andyward]

Also see 03_interference_detection.ifc which may exhibit the same problem (provided privately)

[SteveLockley]

This is now fixed in the develop branch from build 5.209.

[andyward]

Current state:

• 03_interference_detection.ifc
• FKA_ARCH_PODIUM_IFC(EDITED) PROBLEMATIC ELEMENTS ONLY.ifc

The latter file raises an AccessViolationException in

   at Xbim.Geometry.XbimSolidSet.DoBoolean(Object param)
   at Xbim.Geometry.XbimSolidSet.DoBoolean(IXbimSolidSet arguments, BOPAlgo_Operation operation, Double tolerance, ILogger logger)
   at Xbim.Geometry.XbimSolidSet.Cut(IXbimSolidSet solids, Double tolerance, ILogger logger)
   at Xbim.Geometry.XbimSolidSet.Init(IIfcBooleanResult boolOp, ILogger logger)
   at Xbim.Geometry.XbimGeometryCreator.Create(IIfcGeometricRepresentationItem geomRep, IIfcAxis2Placement3D objectLocation, ILogger logger)

Xbim.Essentials Version="5.0.252-develop"
Xbim.Geometry Version="5.0.211-develop"

[SteveLockley]

The model contains some faceted breps that are incorrectly defined (a solid made of two coincidental faces for example), these are now trapped and the exception is handled

[andyward]

Confirmed fixed in Geometry 5.0.216-develop