PlayerClamped.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;


public class PlayerClamped : MonoBehaviour
{

    private Rigidbody rb;
    private Vector3 moveDirection;
    private float moveSpeed = 4f;
    public static float distance;

    [SerializeField]
    Transform firstChain;
    bool grabbed;
    // Use this for initialization
   public bool inRange;
    void Start()
    {
        rb = GetComponent<Rigidbody>();
    }
    // Update is called once per frame
    void Update()
    {
        if (Input.GetAxis("Horizontal") != 0 || Input.GetAxis("Vertical") != 0)
        {
            moveDirection = new Vector3(Input.GetAxis("Horizontal"), 0, Input.GetAxis("Vertical"));
        }
        else
        {
            moveDirection = Vector3.zero;
        }

        if (Input.GetKeyDown(KeyCode.E) && inRange)
        {
            Grab();
        }

       if (moveDirection != Vector3.zero)
          {
                transform.rotation = Quaternion.Slerp(transform.rotation, Quaternion.LookRotation(moveDirection), 0.15F);
                moveDirection = new Vector3(moveDirection.x * moveSpeed, Mathf.Clamp(rb.velocity.y, -5, 5), moveDirection.z * moveSpeed);
                rb.velocity = moveDirection;

            if (grabbed)
            {
                // towards "player"
                Vector3 dir = transform.position - firstChain.transform.position;
                // clamp length
                dir = Vector3.ClampMagnitude(dir, distance);
                // add clamped length
                transform.position = firstChain.transform.position + dir;
                // look towards movement
                transform.rotation = Quaternion.LookRotation(-dir);
            }
         }
         else
         {
                rb.velocity = new Vector3(moveDirection.x, Mathf.Clamp(rb.velocity.y, -5, 5), moveDirection.z);
         }

    }

    void Grab()
    {
        grabbed = !grabbed;




    }
}