AC21 Building Material Priority

[JGoode]

So I've had a look at the building material option when creating an object. I can't seem to get the building priority to work at all. The objects just merge into each other. How do I get this to work? It's not about the script at all but the priorities just don't work correctly.

Thanks

[Laszlo Nagy]

Check this article in the Help Center:

https://helpcenter.graphisoft.com/guides/archicad-21/archicad-21-reference-guide/elements-of-the-vir...

You will notice that Priority Based Connections (PBC) does not apply to GDL-based element types, such as Objects, Doors, Windows, etc. This is why you see the behavior you are seeing.
I think implementing this within GDL Objects would be a quite complex task because every single geometry with a different Building Material within the GDL Object would have to be calculated.
On the other hand, Building Materials have been incorporated into GDL Objects only in ARCHICAD 21, which opens the door for this capability, so hopefully we will see PBC extended to GDL-based element types as well.

[JGoode]

laszlonagy wrote:
Check this article in the Help Center:

https://helpcenter.graphisoft.com/guides/archicad-21/archicad-21-reference-guide/elements-of-the-vir...

You will notice that Priority Based Connections (PBC) does not apply to GDL-based element types, such as Objects, Doors, Windows, etc. This is why you see the behavior you are seeing.
I think implementing this within GDL Objects would be a quite complex task because every single geometry with a different Building Material within the GDL Object would have to be calculated.
On the other hand, Building Materials have been incorporated into GDL Objects only in ARCHICAD 21, which opens the door for this capability, so hopefully we will see PBC extended to GDL-based element types as well.

It would be very useful further down the line. Just for clarity, it doesn't work with objects at all and objects will continue to merge in an odd way with other objects? Thanks for the help.