Combine family instances without using NewFamilyInstances with face

[an_vuong.nguyen]

Hi everyone,

I was trying to combine two family instances together without using NewFamilyInstace with face. After combining i can move both of them once on plance. I have tried to use Host. Unfortunately we cannot set Host in revit api. Does anyone have solution for my problem?

Thank you all very much

Cheers

An Vuong

[jeremy_tammik]

Please explain two things: (i) what does "move both of them once on plance" mean? (ii) what are the exact detailed steps that you use to move them via the end user interface? If you can achieve the desired result in the UI, there is a good chance it can be done programmatically as well. If not, not.

[an_vuong.nguyen]

Hi Jeremy,

Thank you for your reply.
- "move both of them once on plance" means if i move first instance, the second instance has to be moved as well.

-Detailed steps: After i combined instances, i click on the first instance and drag it somewhere else on plane 3. In meantime the second was moved follow the first one.

I hope that my explaining is understandable. Please let me know

Best regards

An Vuong

[s04049 · Accepted solution]

you can try to use Dynamic Model Update using IUpdater interface,

by using the Element.GetChangeTypeGeometry to trigger the event.

get the elements on data.GetModifiedElementIds().

and setup the element location relation you want and move accordingly.

https://adndevblog.typepad.com/aec/2016/02/revitapi-how-to-use-dmu-dynamic-model-update-api.html

[an_vuong.nguyen]

Hi,
Thank you for your solution. It worked find for me (y)

Best regards

An Vuong