RopeScript.cs

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


public class RopeScript : MonoBehaviour {

	public Vector2 destiny;

	public float speed= 1;


	public float distance = 2;

	public GameObject nodePrefab;

	public GameObject player;

	public GameObject lastNode;


	public LineRenderer lr;

	int vertexCount=2;
	public List<GameObject> Nodes = new List<GameObject>();


	bool done=false;

	// Use this for initialization
	void Start () {
	

		lr = GetComponent<LineRenderer> ();

		player = GameObject.FindGameObjectWithTag ("Player");

		lastNode = transform.gameObject;


		Nodes.Add (transform.gameObject);


	}
	
	// Update is called once per frame
	void Update () {
	

		transform.position = Vector2.MoveTowards (transform.position,destiny,speed);




		if ((Vector2)transform.position != destiny) {

			if (Vector2.Distance (player.transform.position, lastNode.transform.position) > distance) {


				CreateNode ();

			}


		} else if (done == false) {

			done = true;



			while (Vector2.Distance (player.transform.position, lastNode.transform.position) > distance) {
				CreateNode ();
			}


			lastNode.GetComponent<HingeJoint2D> ().connectedBody = player.GetComponent<Rigidbody2D> ();
		} else if (Vector2.Distance (player.transform.position, lastNode.transform.position) > distance) {
			CreateNode ();
			lastNode.GetComponent<HingeJoint2D> ().connectedBody = player.GetComponent<Rigidbody2D> ();
		}


		RenderLine ();
	}


	void RenderLine()
	{

		lr.SetVertexCount (vertexCount);
	
		int i;
		for (i = 0; i < Nodes.Count; i++) {

			lr.SetPosition (i, Nodes [i].transform.position);

		}

		lr.SetPosition (i, player.transform.position);

	}


	void CreateNode()
	{

		Vector2 pos2Create = player.transform.position - lastNode.transform.position;
		pos2Create.Normalize ();
		pos2Create *= distance;
		pos2Create += (Vector2)lastNode.transform.position;

		GameObject go = (GameObject)	Instantiate (nodePrefab, pos2Create, Quaternion.identity);


		go.transform.SetParent (transform);

		lastNode.GetComponent<HingeJoint2D> ().connectedBody = go.GetComponent<Rigidbody2D> ();

		lastNode = go;

		Nodes.Add (lastNode);

		vertexCount++;

	}



}