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Question by bagusseno · Jul 15, 2017 at 03:14 PM · rotationquaternionjoystickrotation axisquaternion.slerp

How to Rotate Y axis of an Object toward virtual joystick direction

Hi

I'm creating a third-person game which uses virtual analog/joystick. I have a player and i want it rotate toward the virtual joystick direction. I'm a beginner and i don't know so far about this. But, I have an idea by creating a cube in the middle of analog image as a director then set the rotation of the cube to look at the virtual joystick. This is good but I get the X axis while I need the Y axis since my game is a 3D Third-person. Here is my code so far:

 public virtual void OnDrag(PointerEventData ped)
     {
 // another code
 
             var relativeUp = joystickImg.transform.TransformDirection (Vector3.forward);
             var relativePos = joystickImg.transform.position - director.position;
     
             director.rotation = Quaternion.LookRotation (relativePos, relativeUp);
     
             player.transform.rotation = Quaternion.Slerp(player.transform.rotation, director.rotation, 5 * Time.deltaTime);
 
 }

I really have no idea to swap the X axis of director rotation to Y axis of player rotation. I've tried something and changed the codes like this:

 public virtual void OnDrag(PointerEventData ped)
     {
 // another code
 
         var relativeUp = joystickImg.transform.TransformDirection (Vector3.forward);
         var relativePos = joystickImg.transform.position - director.position;
 
         director.rotation = Quaternion.LookRotation (relativePos, relativeUp);
         var directorRot = director.rotation;
         directorRot.y = directorRot.x;
         directorRot.x = player.transform.rotation.x;
         directorRot.z = player.transform.rotation.z;
 
         player.transform.rotation = Quaternion.Slerp(player.transform.rotation, directorRot, 5 * Time.deltaTime);
 
 }

But that doesn't work, the player rotate to a wrong direction and then stop after it reach some angle (won't rotate). I think now I need the swapping method. Anyone knows how? Thanks!

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