Pick Point in 3D : how to pick on linked files ?

[igor.barcelosC54YD]

Hi, 

I have used the following solution for pick point in the 3D : 

https://thebuildingcoder.typepad.com/blog/2011/11/pick-a-point-in-3d.html

Ok, that's works fine if I have just one model but I can not select faces on linked files. 

Is there any workaround for this ? 

The solution provided below is limited because as it only takes on element class and not faces.

https://thebuildingcoder.typepad.com/blog/2020/07/selection-link-support-cancel-custom-export-multit...

Any help ? 

[longt61 · Accepted solution]

I think the second link has almost everything you need. You can just get the geometry object from the reference and determine if it is a face.

Just modify the selection filter class to make T inherit from Face then add these 2 lines after you get the element from link file

var geo = e.GetGeometryFromReference(r);
return geo != null && geo is Face;

[igor.barcelosC54YD]

The below post is quitte helpful : 

https://forums.autodesk.com/t5/revit-api-forum/selection-on-both-element-amp-linked-element/td-p/921...

Closing de topic.