Lock an axis from rotating

Question

I have a CharacterController that is rotating to always face where the camera is pointing but I want to lock an axis so that it wont lean back and forth when you look up and down.

 void Update() {
     CharacterController controller = GetComponent<CharacterController>();
     Camera cam = GameObject.Find("CharCam").GetComponent<Camera>();
         if (controller.isGrounded) {
             currentSpeedX = Input.GetAxis("Horizontal");
             currentSpeedZ = Input.GetAxis("Vertical");
             moveDirection = new Vector3(currentSpeedX, 0f, currentSpeedZ);
             moveDirection = cam.transform.TransformDirection(moveDirection);
             transform.rotation = cam.transform.rotation;
              moveDirection *= speed;
             } 
             moveDirection.y -= gravity * Time.deltaTime;
             controller.Move(moveDirection * Time.deltaTime); 
 }

Answer 1

Answer by Drakmyth · Dec 30, 2012 at 08:30 PM

I would just set the rotation values for the other two axes to be zero. Right before your transform.rotation line I would say

Vector3 rotVals = new Vector3(0, cam.transform.rotation.y, 0);

Then set transform.rotation to rotVals. Note that t$$anonymous$$s assumes your controller works like the default FPS controller, w$$anonymous$$ch is that the camera itself never rotates left/right, only up/down. Left/right rotation is handled by actually rotating the entire controller (instead of just the camera). If you are actually rotating the camera left/right as well, t$$anonymous$$s obviously won't work and I would recommend using an entirely Quaternion-based rotation system instead.

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Lock an axis from rotating

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