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Question by NicoLocke · Jun 20, 2013 at 09:34 PM · rotationquaternionipadareyes

Limit rotation on x & y axis

I'm working on a project where a set of eyes rotate towards the cameras current position. However, I would like to limit the movement of the eyes on the x & y axis as I am trying to make the eye movement look as natural as possible. Thank you for your time.

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avatar image Graham-Dunnett ♦♦ · Jun 20, 2013 at 09:34 PM 0
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So, what's your question?

avatar image Loius · Jun 20, 2013 at 09:59 PM 0
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http://answers.unity3d.com/questions/58862/limit-local-rotations-on-one-axis.html

avatar image NicoLocke · Jun 21, 2013 at 08:39 AM 0
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"I would like to limit the movement of the eyes on the x & y axis"

Sorry if I didn't make myself clear Graham.

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Answer by aldonaletto · Jun 20, 2013 at 11:22 PM

If you want to limit rotation inside a cone (same angle from the center in any direction), use Vector3.Angle to know the angle relative to the eye forward direction - for instance:

 var maxAngle: float = 15;
 
 private var fwdDir: Vector3;
 
 function Start(){
   fwdDir = transform.forward; // save initial forward direction
 }
 
 function Update(){
   // find direction to camera
   var dir: Vector3 = Camera.main.transform.position - transform.position;
   // if camera inside viewing angle, follow it:
   if (Vector3.Angle(dir, fwdDir) < maxAngle){
     transform.forward = dir;
   }
 }
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avatar image NicoLocke · Jun 21, 2013 at 08:40 AM 0
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$$anonymous$$uch appreciated!

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