How to get the center line of items in a rebar element?

[hai_nn]

Hello, 

I have a rebar element with 4 lines as you can see in the picture.
I edited each item using edit rebar mode.
Using API how can I get exactly 4 lines of each of these items.

Thank you.

[jeremy_tammik]

Here is a solution to retrieve rebar curves:

• https://thebuildingcoder.typepad.com/blog/2019/07/roadmap-rebar-curves-wizard-zip-and-more.html#3

[hai_nn]

I tried transform but the results don't match the centerline items.

Take a look at the image below.

Can you suggest me more?

[Moustafa_K]

can you send the a Revit file sample, i wasn't able to reproduce different behavior when you use GetCenterlineCurves(). So far it is always in a match with the rebar instances. 

[hai_nn]

Select the edit rebar button to adjust each item
Take a look at a model I created myself

[Moustafa_K · Accepted solution]

you need to use GetTransformedCenterlineCurves instead of  GetCenterlineCurves

var curves = rebar.GetTransformedCenterlineCurves(.......);

[tuan253461]

If I edit the bar and delete some bar items in the rebar element, is there any way I can get the centerlines?

[jeremy_tammik]

I see no connection between the two parts of your question, so, simply ignoring the 'if' aspect, here are some ideas on obtaining rebar centreline curves:

• https://thebuildingcoder.typepad.com/blog/2019/07/roadmap-rebar-curves-wizard-zip-and-more.html#3

That issue has also been discussed repeatedly here in the forum, so a quick search might bring additional more pertinent results.