Hello everyone, i need help about rotating family instance based on line direction angle. I am trying to make a safety line to rounding a pile cap through dynamo So, i did the following. but, the results is not what i expected. I know theres something that im missing cause this maybe a very common use. so steps i already did is: make a rectangle with curves arounding the pile cap get the start point of the 4 sides lines and places the safety line at those point ( the point is located all the edges) from the rectangle curves, get all the Line.direction, and connect it with Vector.AngleWithVector and get the degree value. FamilyInstance.SetRotation connected with the safety lines family and the degree value heres the nodes and the results is: [image] what i expect to happen is, the last safety cables should have close the rectangle and , rounding the pile cap How do i to achieve that? Thankyou very much!

[image] Nick_Boyts: I believe AngleWithVector finds the relative angle, so it only goes up to 180 degrees. Vector.AngleAboutAxis for the win!

I believe AngleWithVector finds the relative angle, so it only goes up to 180 degrees. You would also have to take into account the directionality of the line to know whether it’s a positive or negative 90.

You could make a cable box family and have parameters control the size of the box and the height of the cables. Have the origin/insertion point set to the center/bottom of the cable box. Then use FamilyInstance.ByPoint to place cable box family. The insertion points would be the intersection of the column and the top of the slab, which it looks like you are already getting. From that point it would be just a matter of setting the rotation of the cable box family to align with the slab edge or however you want it. Just a thought, that may prove easier.

[image] Rotate family instances based on line direction angle Revit Vector.AngleAboutAxis for the win! It works perfectly !! Thankyou so much [image]

Rotate family instances based on line direction angle

Revit

jacob.small February 1, 2024, 10:51am 4

Vector.AngleAboutAxis for the win!

Topic		Replies	Views
Trouble to finding the right rotation degree to family instance Revit revit , geometry , dynamo	15	274	July 10, 2024
Rotate family instance as per curve Revit	3	1363	June 24, 2018
Get the rotation value from an already placed Family Instance Revit python , dynamo	6	1556	April 10, 2020
Rotating mutliple families Revit revit , geometry , dynamo , familyinstance , family	8	684	March 7, 2022
Family instance and rotation Revit revit	24	6957	May 30, 2023

Rotate family instances based on line direction angle

Related topics