topic Re: Geometry aligned Bounding Box in Revit API Forum

Geometry aligned Bounding Box

zrodgersTSSSU — Mon, 14 Jun 2021 12:04:00 GMT

Hey everyone, I was wondering if there was a way like in dynamo to generate an align bounding box using a coordinate system? I found this and didnt know if something similar would be possible through the API.

Re: Geometry aligned Bounding Box

jeremy_tammik — Mon, 14 Jun 2021 12:41:38 GMT

Not really, I'm afraid. In the Revit API, the bounding boxes are always axis aligned. That is what makes them so fast and efficient.

Re: Geometry aligned Bounding Box

JeremyvU2GS6 — Sat, 15 Feb 2025 19:21:20 GMT

Is this still the case now that dynamo has a Z only axis aligned bounding box? Is there an API call for that?

Re: Geometry aligned Bounding Box

jeremy_tammik — Sat, 15 Feb 2025 20:05:23 GMT

Don't know about Dynamo, I'm afraid. In Revit bounding boxes are aligned with the global coordinate system three cardinal axes X, Y and Z.

Re: Geometry aligned Bounding Box

jeremy_tammik — Sat, 15 Feb 2025 20:08:18 GMT

Actually, the Revit API BoundingBoxXYZ class does indeed sport a Transform property:

https://www.revitapidocs.com/2024/297887ab-69bb-548e-cfb6-a3a23f410604.htm

I have not seen it used, though. It would be interesting to see and hear about usage examples of that.

Re: Geometry aligned Bounding Box

JeremyvU2GS6 — Sat, 15 Feb 2025 21:35:16 GMT

Thanks for the response. I want to elevate elements (curtain walls, windows, doors) to their exterior face. I know of a dynamo method to get only Z aligned BB around geometry to get a face I can use for crop regions etc. Transform will help thanks. Well I use that bounding box and an intersection plane of the element location to ensure its front on