How to move character controller only on X and Z axis but not on Y.

Questions & Answers
1

Hello, I am very new to programming in Unity and programming in general, so please forgive me if I don’t describe my question very well or if I ask extremely nooby questions.

I’ve set up an FPS player controller that moves using WASD, and can also look around using a mouse look script. I used a transformdirection so that, for example, if I look to the left and press W, I will move forward in that direction. The problem is that it does this on all three axis x y and z. I only want this to occur when looking left, right, or forwad. (X and Z I think, but correct me if I’m wrong.) What I don’t want is to move upwards if I’m looking up or downwards if I’m looking down (Y axis)

So using the script I have, how can I make it so I move forwards where I’m looking that isn’t up or down relative to the world?

Also since I’m very new to coding, if I have any problems with my script or if it’s using some bad practices that I’m unaware of please let me know.

Here’s my code:

// Use this for initialization
void Start () 
{
    
    controller = GetComponent<CharacterController>();

}

// Update is called once per frame
void Update ()
{
    //WASD movement
    if(controller.isGrounded)
    {
        
        
        movement = new Vector3(Input.GetAxis("Horizontal"), 0f, Input.GetAxis("Vertical"));
        movement = transform.TransformDirection(movement);
        movement *= speed;

        
    }
   

    controller.Move(movement * Time.deltaTime);
    movement.y -= gravity * Time.deltaTime;

    //Mouse Look 
    if (axes == RotationAxes.MouseXAndY)
    {
        float rotationX = transform.localEulerAngles.y + Input.GetAxis("Mouse X") * sensitivityX * Time.deltaTime;

        rotationY += Input.GetAxis("Mouse Y") * sensitivityY * Time.deltaTime;
        rotationY = Mathf.Clamp(rotationY, minimumY, maximumY);

        transform.localEulerAngles = new Vector3(-rotationY, rotationX, 0);
    }
    else if (axes == RotationAxes.MouseX)
    {
        transform.Rotate(0, Input.GetAxis("Mouse X") * sensitivityX * Time.deltaTime, 0);
    }
    else
    {
        rotationY += Input.GetAxis("Mouse Y") * sensitivityY * Time.deltaTime;
        rotationY = Mathf.Clamp(rotationY, minimumY, maximumY);

        transform.localEulerAngles = new Vector3(-rotationY, transform.localEulerAngles.y, 0);
    }
    if (lockCursor)
    {
        Cursor.lockState = CursorLockMode.Locked;
    }

    //transform.Rotate(Input.GetAxis("Mouse Y") * new Vector3(sensitivityY, 0, 0) * Time.deltaTime);

    if (lockCursor)
    {
        Cursor.lockState = CursorLockMode.Locked;
        
    }
    
    

}

}
`

2

Here is a simple script you can use:

public float speed = 3.5f;

void Move () {
// Check if grounded
if(!controller.isGrounded)
    return;

 // Get Axis Inputs
 float x = Input.GetAxis ("Horizontal") * Time.DeltaTime * speed;
 float z = Input.GetAxis ("Vertical") * Time.DeltaTime * speed;

 // Translate the object
 transform.Translate (x , 0, z);
}

public int turnDegrees = 2;

void Rotate () {
 // Don't rotate in air 
 if(controller.isGrounded)
     return;

// If Q and E are pressed
if (Input.GetKey (KeyCode.Q)) 
   transform.Rotate (new Vector3 (0, -turnDegrees, 0));

if (Input.GetKey (KeyCode.E)) 
   transform.Rotate (new Vector3 (0, turnDegrees, 0));
}

void LateUpdate () {
  Move (); // Handles Movement
 Rotate (); Handles Rotation - Might need to change this to your mouse look script
}