Quaternion problem for character rotation

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Hi, guys! I don't understand much of Unity and C#, yet! So, i could use some help from you.

The code that i implemented in my character isn't working as supposed.
I'm tryint to reproduce the same movement style as in the Super Mario game video.

Here's the code:

 // Update is called once per frame
 void Update() {
     CharacterController controller = GetComponent<CharacterController> ();

     if (controller.isGrounded) {
         moveDirection = new Vector3 (Input.GetAxis ("Horizontal"), 0, Input.GetAxis ("Vertical"));
         moveDirection = transform.TransformDirection (moveDirection);
         moveDirection *= runningSpeed; //Speed when moving

         if (Input.GetButton ("Jump")) {                
             moveDirection.y = jumpSpeed; //1xJump
             anim.SetBool ("Jump", true);
         } else {
             anim.SetBool ("Jump", false);
         }

         //Rotation to the 8 directions
         Vector3 inputDir = new Vector3 (Input.GetAxis ("Horizontal"), 0, Input.GetAxis ("Vertical"));
         Vector3 v = inputDir.normalized;
         v.x = Mathf.Round (v.x);
         v.z = Mathf.Round (v.z);
         if (v.sqrMagnitude > 0.1f)
             targetDir = v.normalized;

         transform.rotation = Quaternion.Slerp (transform.rotation, Quaternion.LookRotation (targetDir), Time.deltaTime * rotationSpeed);

     }
     moveDirection.y -= gravity * Time.deltaTime; // Effect of gravity
     controller.Move (moveDirection * Time.deltaTime);
 }

Here's the issue:

When i type left, my character faces left, like in the Super Mario video posted here, but while facing that new direction, my character moves towards the camera. Same happens when pressing right. And when pressing down, he faces the camera, but instead of moving towards her, he moves in the opposite direction.

Also, he doesn't move in the diagonals, while pressing Up and Right/Left simultaneously.

Console keeps saying: "Look rotation viewing vector is zero"

I hope what i just wrote seems clear to you! Thanks, in advance, for the help given!

Answer 1

Answer by Namey5 · Apr 24, 2017 at 10:21 AM

 moveDirection = transform.TransformDirection (moveDirection);

Remove this line. Because you are rotating the character, transforming the move direction into local space also changes the direction it's moving.

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andre_95 · Apr 24, 2017 at 10:29 AM 0

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@Namey5 I just removed that line, but without it the character doesn't move. Should i remove the lines where moveDirection is mentioned too?

Namey5 andre_95 · Apr 24, 2017 at 01:50 PM 0

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There's no reason why the character would stop moving, are you certain you removed the correct line and nothing else? All this line does is convert it from a world space direction to a local space direction, i.e. a direction relating to the direction in which the object itself is facing. The whole Update void should be the following;

  void Update() {
      CharacterController controller = GetComponent<CharacterController> ();
      if (controller.isGrounded) {
          moveDirection = new Vector3 (Input.GetAxis ("Horizontal"), 0, Input.GetAxis ("Vertical"));
          moveDirection *= runningSpeed; //Speed when moving
          if (Input.GetButton ("Jump")) {                
              moveDirection.y = jumpSpeed; //1xJump
              anim.SetBool ("Jump", true);
          } else {
              anim.SetBool ("Jump", false);
          }
          //Rotation to the 8 directions
          Vector3 inputDir = new Vector3 (Input.GetAxis ("Horizontal"), 0, Input.GetAxis ("Vertical"));
          Vector3 v = inputDir.normalized;
          v.x = $$anonymous$$athf.Round (v.x);
          v.z = $$anonymous$$athf.Round (v.z);
          if (v.sqr$$anonymous$$agnitude > 0.1f)
              targetDir = v.normalized;
          transform.rotation = Quaternion.Slerp (transform.rotation, Quaternion.LookRotation (targetDir), Time.deltaTime * rotationSpeed);
      }
      moveDirection.y -= gravity * Time.deltaTime; // Effect of gravity
      controller.$$anonymous$$ove (moveDirection * Time.deltaTime);
  }

Quaternion problem for character rotation

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