pulling objects

Hey there,

try the following:

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 
 public class PullScript : MonoBehaviour {
 
     private List<GameObject> pullObjects;
     public Vector3 pullDirection;
     public float pullSpeed;
     void Start () {
         pullObjects = new List<GameObject> ();
     }
 
     void Update () {
         foreach (GameObject obj in pullObjects) {
             obj.transform.Translate (Time.deltaTime * pullSpeed * pullDirection);
         }
     }
 
     public void OnTriggerEnter(Collider col)
     {
         Debug.Log ("object entered");
         pullObjects.Add (col.gameObject);
     }
 
 
     public void OnTriggerExit(Collider col)
     {
         pullObjects.Remove (col.gameObject);
     }
 
 }

Attach this script to an object that should pull others through. You can define a speed and a pullDirection in the editor. Both objects need a trigger Collider! One of them additionaly needs to have a rigidbody attached. Otherwise unity will not register any collision.