Wrong geometry with booleans

[d-brunet]

Hi, I have an IFC file with a geometric issue. When I'm loading it on BimCollab everything is fine, but when I'm using xBim some boolean operations are missing. It seems that the boolean operation is carried out but that the second operand is merged instead of being removed.

Assemblies and versions affected:

Xbim.Common 4.0.0.0 4.0.1911.29500 Xbim.Geometry.Engine.Interop 4.0.0.0 4.0.1912.28352 Xbim.Ifc 4.0.0.0 4.0.1911.29500 Xbim.Ifc2x3 4.0.0.0 4.0.1911.29500 Xbim.Ifc4 4.0.0.0 4.0.1911.29500 Xbim.IO 4.0.0.0 4.0.1911.29500 Xbim.ModelGeometry.Scene 4.0.0.0 4.0.1912.28352 Xbim.Presentation 4.0.0.0 4.0.2002.10344 Xbim.Tessellator 4.0.0.0 4.0.1911.29500

and

Xbim.Common 5.1.0.0 5.1.289.0 Xbim.Geometry.Engine.Interop 5.1.0.0 5.1.317.0 Xbim.Ifc 5.1.0.0 5.1.289.0 Xbim.Ifc2x3 5.1.0.0 5.1.289.0 Xbim.Ifc4 5.1.0.0 5.1.289.0 Xbim.IO.Esent 5.1.0.0 5.1.289.0 Xbim.IO.MemoryModel 5.1.0.0 5.1.289.0 Xbim.ModelGeometry.Scene 5.1.0.0 5.1.0.0 Xbim.Presentation 5.1.0.0 5.1.0.0 Xbim.Tessellator 5.1.0.0 5.1.289.0

Result expected:

Result obtained with xBim:

File to reproduce: VAGNEY_WALL.zip

Best regards, Damien

[SteveLockley]

If I read you model correctly both results are wrong ans I have the same problem in Solibri, am I right that your model result should be nothing at all ?

[SteveLockley]

If I read you model correctly both results are wrong ans I have the same problem in Solibri, am I right that your model result should be nothing at all ?

[d-brunet]

No, I do the opposite.

This the body:

And I substract this:

[d-brunet]

After more research, the problem appears when the depth of the hole made in the wall is the same as the depth of the wall.