Good evening Dynamo Community!
I have created front views and planviews of columns and now I want to rotate the planview to match the orientation of the front view.
I use a Vector from the front surface of the column and a new vector to get the rotation between the two vectors. Now I´m getting different angles depending on the vector direction respectively the location of the front surface, i think.
Here are the angles I get for these two columns. I think they are not correct because they should have a difference of 180°. Should be 205° and not 155°?!
I can only get it working for some views but some views get the wrong rotation as you can see here:
Is the Problem the direction of the vectors? Should i work with the coordinate systems instead? I already have the coordinate systems of each column.
Would be really happy about any advice!
Have a nice weekend!
Kind regards,
Gerhard
No succes after hours of trying 
I`m now using the Element Coordinatesystems but i can´t get the right angles.
When i use 1/0/0 as reference vector i get both angles wrong:
When i use -1/0/0 as reference vector one angle is right:
So my method of getting the rotation of the coordinate system doesnt work
Edit:
Oh it seems the 2 Columns have the same coordinate system, only the vector is going in the other direction
I think i found the solution, i have to consider 3 cases and make 3 groups of columns:
- x vector = +
- x vector = -
- x vector = 0
It was a wild ride but i did it 
These are examples of the 3 cases of view directions that can happen:
First i filter the columns with x=0, that means all with vertical front surface.
Then i split the remaining columns in x = + and x = -
Maybe there would have been a cleaner way, but I´m good as long as it works.
The Structural plans are now all rotated right:
