[ Feature / Bug ] - Mirror Export to IFC as IFCBuildingElementProxy

[paullee]

Testing an Mirror of Wall exporting to IFC.

Mirror is exported as IfcBuildingElementProxy, not as Wall.

Screenshot from 2019-11-13 01-04-02.png (197.67 KiB) Viewed 1169 times

Screenshot from 2019-11-13 01-08-46.png (47.44 KiB) Viewed 1169 times

Screenshot from 2019-11-13 01-13-52.png (21.79 KiB) Viewed 1169 times

[yorik]

Indeed, the mirror is a Part object with no IFC capabilities..
The easiest solution would be to encapsulate it into a wall. We could think of detecting these objects in the IFC exporter and give them the same type of their original, but not sure that will always be what users want. Also, mirroring is not properly supported in IFC, so there could be some further misinterpretations coming from there...

[Moult]

Just a heads-up that mirroring is possible by using a mapped representation, with a non-uniform cartesian transformation scale of -1 along an axis. This has been implemented in Blender with Blender's mirror modifier

https://github.com/IfcOpenShell/IfcOpen ... c.py#L1492 shows recording the scale value.

https://github.com/IfcOpenShell/IfcOpen ... fc.py#L237 shows looking at Blender's mirror modifier and overriding a -1 scale to achieve it.

[paullee]

Just a heads-up that mirroring is possible by using a mapped representation, with a non-uniform cartesian transformation scale of -1 along an axis. This has been implemented in Blender with Blender's mirror modifier

https://github.com/IfcOpenShell/IfcOpen ... c.py#L1492 shows recording the scale value.

https://github.com/IfcOpenShell/IfcOpen ... fc.py#L237 shows looking at Blender's mirror modifier and overriding a -1 scale to achieve it.

Thanks for information. Hope someone can implement in FC