Character look to mouse

Unity Engine
1

I am trying to get my character to look to where my mouse is pointing while using the wasd keys for movement. I have tried several different scripts but none have worked. I’m not sure what it is that is hindering my character from turning. Any suggestions?

2 
using UnityEngine;
using System.Collections;

[System.Serializable]
public class Boundary
{
    public float xMin, xMax, zMin, zMax;
}

public class PlayerController : MonoBehaviour
{
    public float speed;
    Vector3 movement;
    public Boundary boundary;
    new Rigidbody rigidbody;
    int floorMask;
    float camRayLength = 100f;

    public GameObject shot;
    public Transform shotSpawn;
    public float fireRate;

    private float nextFire;

    void Update()
    {
       
        if (Input.GetButton ("Fire1") && Time.time > nextFire) {
            nextFire = Time.time + fireRate;
            Instantiate (shot, shotSpawn.position, shotSpawn.rotation);
            GetComponent<AudioSource>().Play ();
        }
    }

    void Start()
    {

        floorMask = LayerMask.GetMask("Floor");
        rigidbody = GetComponent<Rigidbody> ();
    }

    void FixedUpdate ()
    {

        float h = Input.GetAxis ("Horizontal");
        float v = Input.GetAxis ("Vertical");

        Move(h, v);

        Turning();

        rigidbody.position = new Vector3
            (
                Mathf.Clamp(rigidbody.position.x, boundary.xMin, boundary.xMax),
                0.0f,
                Mathf.Clamp(rigidbody.position.z, boundary.zMin, boundary.zMax)
                );

       
    }

    void Move(float h, float v)
    {
        movement.Set(h, 0f, v);

        movement = movement.normalized * speed * Time.deltaTime;

        rigidbody.MovePosition(transform.position + movement);
    }

    void Turning()
    {
        Ray camRay = Camera.main.ScreenPointToRay(Input.mousePosition);

        RaycastHit floorHit;

        if (Physics.Raycast(camRay, out floorHit, camRayLength, floorMask))
        {
            Vector3 playerToMouse = floorHit.point - transform.position;

            playerToMouse.y = 0f;

            Quaternion newRotation = Quaternion.LookRotation(playerToMouse);

            rigidbody.MoveRotation(newRotation);
        }
    }
}
3

There are a few tiny issues. For one, I think you want the inverse of floorMask (~floorMask) to pass into the raycast check.

Also, I changed the contents of your “if” statement block to simply be:

        if (Physics.Raycast(camRay, out floorHit, camRayLength, ~floorMask))
        {
            transform.LookAt ( floorHit.point);
        }

Now when I did that, the act of rotating the rigidbody “drives” it funny on the map, so it is probably best to rotate a sub component of the player rather than his rigidbody. I will leave that change to you!