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Question by LinkUpGames · Nov 29, 2016 at 08:16 AM · c#vector3quaternion

Look rotation viewing vector is zero

Hi there, this question has been asked numerous times as I found by Googling the solution. However the solution everyone gave was to place the Quaternion within an if statement declaring

 if(NextDir != Vector3.zero){}

The problem being that my Quaternion rotation is already inside that if statement and it still gives me the "error"

Here is my code I'm not sure exactly where the issue lies:

         CharacterController controller = GetComponent<CharacterController>();
         NextDir = new Vector3(Input.GetAxisRaw("Horizontal"), 0, Input.GetAxisRaw("Vertical"));
         Quaternion wantedRotation = Quaternion.LookRotation(NextDir);
         if (NextDir != Vector3.zero)
         {
             this.transform.rotation = Quaternion.RotateTowards(this.transform.rotation, wantedRotation, rotateSpeed * Time.deltaTime);
         }
         NextDir *= speed;
         controller.Move(NextDir * Time.deltaTime);
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Answer by slavo · Nov 29, 2016 at 01:00 PM

Hi you are calculating LookRotation before sanity check.

   CharacterController controller = GetComponent<CharacterController>();
          NextDir = new Vector3(Input.GetAxisRaw("Horizontal"), 0, Input.GetAxisRaw("Vertical"));
 
          if (NextDir != Vector3.zero)
          {
         // Do not calculate rotation if dir is zero
          Quaternion wantedRotation = Quaternion.LookRotation(NextDir);
              this.transform.rotation = Quaternion.RotateTowards(this.transform.rotation, wantedRotation, rotateSpeed * Time.deltaTime);
          }
          NextDir *= speed;
          controller.Move(NextDir * Time.deltaTime);


This should remove your warning.

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avatar image LinkUpGames · Nov 29, 2016 at 08:06 PM 0
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Oh wow I should've noticed that! Thank you very much!

avatar image Anomaex · Aug 18, 2017 at 05:36 PM 0
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Thanks you!

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