topic Re: Placing families (structural columns on a line with a specific distance )using C# in Revit API Forum

Placing families (structural columns on a line with a specific distance )using C#

ahmadkhalaf7892 — Wed, 22 Feb 2023 10:39:24 GMT

hi guys I wanted to ask how can I place a family on a model curve with a specific distance in C# (like the photo above ) I have done before using Dynamo , but my company thinks that it would be better to place them via C#. I just need some help because I have only started using C# two month ago.
I would love to hear how it is done, or if I can get the method to place families, or load them according to the shapes above.
Thanks

Re: Placing families (structural columns on a line with a specific distance )using C#

jeremy_tammik — Wed, 22 Feb 2023 10:50:24 GMT

Well, placing the instances is not a problem:

https://thebuildingcoder.typepad.com/blog/about-the-author.html#5.25.2

Determining equidistant points along a straight line is trivial.

The more complex problem of determining equidistant points along a curve is harder and has been discussed here many times. Here are some hits searching for 'equidistant':

Some of those have the exact same goal as you describe.

So, searching can help.

Re: Placing families (structural columns on a line with a specific distance )using C#

ahmadkhalaf7892 — Wed, 22 Feb 2023 11:29:16 GMT

Hi Jeremy,
thanks a lot for the sources. They helped me understand how to divide a line/curve in Revit API. However I was unable to know the method for placing a family in a specific location/point.
May I ask what method is used for such a thing ?
thanks

Re: Placing families (structural columns on a line with a specific distance )using C#

jeremy_tammik — Wed, 22 Feb 2023 13:09:24 GMT

Hmm. That question is answered quite a (large) number of times by the articles in The Building Coder topic group on family instance placement that I pointed out in my previous answer above:

https://thebuildingcoder.typepad.com/blog/about-the-author.html#5.25.2

For an even shorter answer: NewFamilyInstance Method:

https://www.revitapidocs.com/2023/451ee414-cea0-e9bd-227b-c73bc93507dd.htm

Re: Placing families (structural columns on a line with a specific distance )using C#

ahmadkhalaf7892 — Wed, 22 Feb 2023 13:10:50 GMT

Thank you very much