Движение объекта на плоскости по клику мыши

void Update()
    {
        if (Input.GetMouseButtonDown(0))
        {
            Vector3 pos2 = Terrain1.hit.point;
            transform.LookAt(pos2);
            rigidbody.position += (-rigidbody.transform.forward + pos2).normalized*Time.deltaTime;
        }
    }

public class ClickMove : MonoBehaviour
{
    public float stopStart = 1.5f, speed = 5f, rotationSpeed = 100f, heightPlayer = 1f;
    private float mag, angleToTarget;
    private Ray ray;
    private RaycastHit hit;
    private Vector3 dir;
    private Vector3 target = new Vector3 ();
    private Vector3 lastTarget = new Vector3 ();
    private bool walk;
    
    private void Update ()
    {
        if (Input.GetMouseButton (1)) {
            Graphic.wasClicked = true;
            ray = UnityEngine.Camera.mainCamera.ScreenPointToRay (Input.mousePosition);
            if (Physics.Raycast (ray, out hit, 10000.0f)) {
                target = hit.point;
            }
        }
        LookAtThis ();
        MoveTo ();
    }
 
    private void CalculateAngle (Vector3 temp)
    {
        dir = new Vector3 (temp.x, transform.position.y, temp.z) - transform.position;
        angleToTarget = Vector3.Angle (dir, transform.forward);
    }
 
    private void LookAtThis ()
    {
        if (target != lastTarget) {
            CalculateAngle (target);
            if (angleToTarget > 3)
                transform.rotation = Quaternion.RotateTowards (transform.rotation, Quaternion.LookRotation (dir), rotationSpeed * UnityEngine.Time.deltaTime);
        }
    }
 
    private void MoveTo ()
    {
        if (target != lastTarget) {
            if ((transform.position - target).sqrMagnitude > heightPlayer + 0.1f) {
                if (!walk) {
                    Debug.Log ("walk");
                    //animation.Play("run", PlayMode.StopAll);
                    walk = true;
                }
                mag = (transform.position - target).magnitude;
                transform.position = Vector3.MoveTowards (transform.position, target, mag > stopStart ? speed * UnityEngine.Time.deltaTime : Mathf.Lerp (speed * 0.5f, speed, mag / stopStart) * UnityEngine.Time.deltaTime);
                ray = new Ray (transform.position, -Vector3.up);
                if (Physics.Raycast (ray, out hit, 1000.0f)) {
                    transform.position = new Vector3 (transform.position.x, hit.point.y + heightPlayer, transform.position.z);
                }
            } else {
                lastTarget = target;
                if (walk) {
                    Debug.Log ("idle");
                    //animation.Play("idle", PlayMode.StopAll);
                    walk = false;
                }
            }
        }
    }
}