Obtain angle from given rotation

Question

Hi there!

I've been searching around the Community and I didn't find a suitable response for me, or at least I cannot get the possible solutions working on my project.

I want to simulate wind on a 2D environment, making this wind affecting an object. I get a random angle between 1 and 360 and compare it with the angle of the object. I'm obtaining this angle with:

 Quaternion.Angle(transform.rotation, Quaternion.identity)

The problem is that this value varies between 0 and 180, unsigned, no matter the rotation of the object. I need to know the sign because if the angles are the same, the object reaches maximum speed in the direction it is facing, stopping if they are contrary.

How can I obtain the object's angle having its rotation?

Thanks!

Answer 1

Answer by slavo · Dec 15, 2017 at 12:10 PM

Hi if you are in 2d, only angle you need to take care is you Euler Z. It it angle relative to Right Vector

     float angle = transform.rotation.eulerAngles.z; //0 - 360 comapring to Vector2.right anti clockwise
     float signedAngle = angle > 180 ? angle - 360f : angle; //-180, 180 comapring to Vector2.right

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Obtain angle from given rotation

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