How to get True Coordinate of Internal Origin by Revit API?

[gifthelper01]

Hi All,

I am writing an add-in to place family based on several coordinates relative to Revit Coordination System.

I know that Revit API/C# will treat Internal Origin as 0,0,0. However, actually the Internal Origin is not sitting at 0,0,0 in the Revit model.

Is anyone know how to find the "true coordinate" of Internal Origin in Revit model by using Revit API and compare the displacement of Internal Origin from 0,0,0?

Thanks a lot.

[Yien_Chao]

try to get the location by this :

https://www.revitapidocs.com/2022/94d93a9c-04d1-b277-5785-7b661ab2eaba.htm

then get the coordinates.

and for distance relative to the internal origin, use math :

https://www.math.usm.edu/lambers/mat169/fall09/lecture17.pdf

hope that could help