Issue when freezing Quaternion rotation in one axis?

Questions & Answers
1

Hi,

how can i freeze the rotation to an axis so that the character does not bend over to look at his target?

I have tried to copy the character’s rotation in y or z, but the result is not what i would expect:

This is the wrong result : (the character is bending over)

425206-wrong.png42

var rot : Quaternion = Quaternion.identity;

//in UPDATE
var dir : Vector3 = vectorEndPoint - thisTransform.position; //vectorEndPoint = the ball; thisTransform = the character
			
rot = Quaternion.LookRotation( dir ); 
rot.eulerAngles.z = thisTransform.rotation.z;	//y or z	    
thisTransform.rotation = Quaternion.Slerp( thisTransform.rotation, rot, Time.deltaTime * 5 );

//or this way :

var dir : Vector3 = vectorEndPoint - thisTransform.position;

//TEST	    
thisTransform.rotation = Quaternion.Slerp( thisTransform.rotation, rot, Time.deltaTime * 5 );
thisTransform.localEulerAngles = new Vector3(thisTransform.localEulerAngles.x, 0, thisTransform.localEulerAngles.z);

Would you know you to achieve this?

Thanks

SOLUTION:

var newRotation = Quaternion.LookRotation( dir );
newRotation.x = 0.0;
newRotation.z = 0.0;
thisTransform.rotation = Quaternion.Slerp( thisTransform.rotation, newRotation, Time.deltaTime * 5 );
2

Thanks Owen for the comment, here is the solution :

            var newRotation = Quaternion.LookRotation( dir );
		    newRotation.x = 0.0;
		    newRotation.z = 0.0;
		    thisTransform.rotation = Quaternion.Slerp( thisTransform.rotation, newRotation, Time.deltaTime * 5 );