Einar Raknes

Not sure if this is exactly what you are asking for, but here is a script for moving the whole IFC model: https://github.com/IfcOpenShell/IfcOpenShell/blob/v0.6.0/src/ifcpatch/recipes/OffsetObjectPlacements.py . Maybe it helps to see the discussion here for more context: https://community.osarch.org/discussion/47/ifcopenshell-patch-reset-shared-coordinates-possible-to-specify-coordinates-and-rotation#latest

I have posted a similar request on github: https://github.com/Autodesk/revit-ifc/issues/60 Looks like it's possible to get the calculated value by iterating over each row in a schedule: https://apidocs.co/apps/revit/2019/d7f874df-30a8-cf03-f24c-c66f2be91a39.htm . Though I think thats a bit different than the current implementation that only looks at the schedule fields (headers) and figure out what parameters they represent. Combined parameters on the other hand sould be more trivial to implement...

Hi Jon! The export seems to be correct to me. My personal preference would be that the "survey point" option should behave like the "shared coordinates". By that I mean the rotation should be included in the element. But that is only a feeling/personal expectation. Thank you very much for the contributions! Regards, Einar

Hi Jon! Thank you for the example files. I think I'm starting to get this now. Does my answer to Angel make any sense? I didn't realize that moving the PBP unclipped did anything to the IFC export. Did you use the official exporter? I sent you a request for a trial version for your Revit addin.. Thanks, Einar

Hello Angel, For the "Internal" export I was expecting no offset of the geometry (It is as expected: IfcLocalPlacement = Point(0,0,0)) For the "Survey Point" export I was expecting both an offset (point) and a rotation (direction). The offset is as expected, but I also expected to see a direction. I guess it's because I assosiate the survey point with shared coordinates. I guess it makes sense that when the geometry is rotated towards true north in IfcLocalPlacement, the angle to true north is 0...

I have a Revit file with a rotation to true north of 20°. I have exportet two files to IFC, one with "Internal" and one with "Current Shared coordinates". When I linked the IFCs back into Revit I was surprised to see that the "Internal"-file was rotated and the "Shared ..." was not. In Solibri it's the opposite. I found the rotation in a IFC entity called IfcGeometricRepresentationContext, but only in the "Internal" ifc file. Is this expected behavior?

Thank you Angel! I know the easy way(s), but I was tired of mapping parameter values in Revit and manually remember to combine and calulate them before export. I was hoping to achieve this with the method above and a couple of PropertyCalculator Classes. Hopefully I'm on the right track here. Example: I want a IFC-propery to be a combination of the revit paramters"Partition" and "Rebar Number", another calculated as Mass = Volume*7850

I have tried to follow the examples given in the handout and presentation given by Angel Velez in AU2013. I am trying to create an exporter based on the existing IFC exporter, and my goal is simply to add a custom propery set. Here is what I have so far, and now I wonder where and what I call to include the new propery set to the export? namespace EiBreIFC { public class EiBreExporter : Exporter { ..... ..... public EiBreExporter() { InitPropertySetRebar(); //How to add the new property set? } private...