Autodesk Inventor

[#1]

How do I measue angles between faces in a rule? I want to create a simple if statment depending on the angle between a rotating object and a grounded object. If a certain face of the rotating object is 180 degrees relative a face on the fixated object the rotating object is supposed to rotate around its own axis. 

I've seen the Measure.Angle-function but I can't get it to work.

Thanks!

[#2]

Does it have to be a dimension? are you in an assembly?

[#3]

Yes, it´s in an assembly. 

Well i I just want the rule to measue the angle between the two faces (two different parts) each time the rule iterates to determine the state of the rotating object. As I mentioned before, the rotating objects' angle relative the ground is supposed to be determined depending on the angle between two faces. 

[#4]

How are you controlling the angle?

[#5]

It is constrained on another object which is rotating and the rotating movement is controlled with an angle parameter. 

I simply want a rule to measure an angle between two faces on its own to launch different actions depending on that angle. 

[#6]

Just have the rule read the parameter not a dimension..

[#7]

That´s what I've been doing but I realized that it's not a good way to go. I'm driving the constraint (parameter) now to make the movements the way I want them to be, but later on when I'm going to do simulations the parameter is not going to be the reason the object is rotating. But if i manage to measure the angle between the objects within the code I will be able to determine its position. Do you know if it's possible to do that?