Rotation of a family on its axis

Revit
1

Hello,

I have a duct ventilation accessory, and I would like to apply a rotation to it on its axis (angle defined by the XY and Z plane)
I started a script to apply this rotation. He works.
But now we need to know the current angle to calculate the angle of rotation to apply.
This is where I’m stuck
On image 1, the floor view, where I have to apply the rotation on the family on the right
image 1
On image 2, a section (with an example of an angle)
image 2

Rotaion
Rotaion1612×502 44.5 KB

2

Hello @Alain_Hamel …could something here help

Screenshot 2022-04-03 081900
Screenshot 2022-04-03 0819001360×622 135 KB

3

Hello,
Thanks for your answer, but you get the same as me.
With Rotate Fitting, the rotation is made from the starting angle.
You should actually calculate the value of 38°, and apply a value of -38° in your script.
But by default I do not know this value, precisely I would like to calculate it

4

Hi,think it will be difficult as it will depends how your damperfamily is build