Get faces touch between two elements

[NhuTruong_BeyCons]

Dear everyone, how can I get faces to touch between element? Thank you.

[jeremytammik]

Retrieve all faces from both elements, and test them with the GetGeneratingElementIds method:

https://apidocs.co/apps/revit/2019/112590d2-de20-dd1f-ae05-df7dfb3b410f.htm

Cheers,

Jeremy

[NhuTruong_BeyCons]

Thank Jeremy,

In case of that picture shown, how to choose all column 'faces without floor tangency? Thank you.

[NhuTruong_BeyCons]

In Dynamo, I can get all the information at intersecting place, how can I do similar in Revit API. Thank you.