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Question by 8Eye · Dec 20, 2014 at 03:52 PM · angle

Quaternion.Angle question

Hi. I am trying to make something happen only if the player is looking approximately in the targets position. I tried to use the Quaternion.Angle function but it only works if the enemy is looking at the player, And stops working when the enemy turns away.

This is how i did it.

                     if(Quaternion.Angle(transform.rotation,pc.target.transform.rotation) > 170
                     && Quaternion.Angle(transform.rotation,pc.target.transform.rotation) < 190){


My question is how can i ignore where the enemy is looking and only compare the players rotation with the targets rotation?

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Answer by Baste · Dec 20, 2014 at 04:08 PM

You use LookRotation.

Simply find the rotation you would have if you were looking directly at the target:

 Quaternion wantedRotation = Quaternion.LookRotation(target.transform.position - transform.position);

Find the angle between it and your current rotation:

 float angle = Quaternion.Angle(transform.rotation, wantedRotation)

And do something if the angle is below a certain treshhold:

 if(angle < 20f) { 
     DoMyThing();
 }


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avatar image 8Eye · Dec 20, 2014 at 04:18 PM 0
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Awesome thanks!

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