Collision for Amount of Time

Question

Hi guys,

I'm making a teleportation system that I need help with.

If the player collides with the portal for x amount of seconds, then the player gets teleported. If the player doesn't collide with the portal for X amount of seconds, or just zooms by the portal, then he doesn't get teleported.

Heres my teleportation script:

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

public class Teleportation : MonoBehaviour { //portals public GameObject Portal; public GameObject Portal1; public GameObject Portal2;

 //players
 public GameObject Player1;
 public GameObject Player2;
 public GameObject Player3;
 public GameObject Player4;

 public void OnTriggerStay2D(Collider2D other) //checks if player is interacting with the portal
 {
     if(other.gameObject.name == "Player 1 (Red)")
     {
         StartCoroutine(TeleportP1()); //uses/calls teleportP1 IEnumerator
     }

     if(other.gameObject.name == "Player 2 (Blue)")
     {
         StartCoroutine(TeleportP2());
     }

     if(other.gameObject.name == "Player 3 (Green)")
     {
         StartCoroutine(TeleportP3());
     }

     if(other.gameObject.name == "Player 4 (Yellow)")
     {
         StartCoroutine(TeleportP4());
     }
 }

 IEnumerator TeleportP1()
 {
     yield return new WaitForSeconds(1);
     //teleportation for all players for Portal1
     Player1.transform.position = new Vector2(Portal.transform.position.x, Portal1.transform.position.y);
     Player1.transform.position = new Vector2(Portal1.transform.position.x, Portal.transform.position.y);
     Player1.transform.position = new Vector2(Portal2.transform.position.x, Portal1.transform.position.y);
 }

 IEnumerator TeleportP2()
 {
     yield return new WaitForSeconds(1);
     Player2.transform.position = new Vector2(Portal.transform.position.x, Portal1.transform.position.y);
     Player2.transform.position = new Vector2(Portal1.transform.position.x, Portal.transform.position.y);
     Player2.transform.position = new Vector2(Portal2.transform.position.x, Portal1.transform.position.y);

 }

 IEnumerator TeleportP3()
 {
     yield return new WaitForSeconds(1);
     Player3.transform.position = new Vector2(Portal.transform.position.x, Portal1.transform.position.y);
     Player3.transform.position = new Vector2(Portal1.transform.position.x, Portal.transform.position.y);
     Player3.transform.position = new Vector2(Portal2.transform.position.x, Portal1.transform.position.y);
 }

 IEnumerator TeleportP4()
 {
     yield return new WaitForSeconds(1);
     Player4.transform.position = new Vector2(Portal.transform.position.x, Portal1.transform.position.y);
     Player4.transform.position = new Vector2(Portal1.transform.position.x, Portal.transform.position.y);
     Player4.transform.position = new Vector2(Portal2.transform.position.x, Portal1.transform.position.y);
 }

} alt text

Answer 1

If I may suggest a rewrite instead, you can grab each player anonymously for a teleport instead by using a script attached to each teleporter:

 public class Teleporter : MonoBehaviour
 {
     // Time until teleport while inside trigger area
     public float activationTime = 1.0f;
     // Current targets/players without teleporter
     List<TeleportationTarget> targets;
     // using a Transform allows for a moving,
     // 1-way exit point, if desired
     Transform destination;
 
     void Start()
     {
         targets = new List<TeleportationTarget>();
     }

     void OnTriggerEnter2D(Collider2D other)
     {
         // Determine whether the target is valid
         // A potential example for players only:
         if(other.CompareTag("Player"))
         {
             targets.Add(new TeleportationTarget(other.transform));
         }
     }

     void OnTriggerExit2D(Collider2D other)
     {
         // Check through the list to find where
         // this player was being tracked.
         for(int i = 0; i < targets.Count; i++)
         {
             if(targets[i].target == other.transform)
             {
                 targets.RemoveAt(i);
                 break;
             }
         }
     }

     void Update()
     {
         // Processed in reverse order because the
         // last in would be the last out as well.
         // If a target is removed, the iterator will
         // still be in the right spot.
         for(int i = targets.Count - 1; i >= 0; i--)
         {
             targets[i].elapsedTime += Time.deltaTime;
             if(targets[i].elapsedTime >= activationTime)
             {
                 // Teleportation will result in
                 // OnTriggerExit2D triggering
                 // for the player, but a fallback
                 // removal from the list can
                 // be added here if necessary
                 Teleport(targets[i].target);
             }
         }
     }

     void Teleport(Transform target)
     {
         target.position = destination.position;
     }
 }

 public class TeleportationTarget
 {
     // The target, player or otherwise, for a teleport
     public Transform target;
     // The time the target has spent near this teleporter
     public float elapsedTime;
 
     public TeleportationTarget(Transform target)
     {
         this.target = target;
         elapsedTime = 0.0f;
     }
 }

It may seem a bit lengthy this way, but it improves efficiency by not needing to call OnTriggerStay2D every frame for every object in range, and it allows for the potential to have non-player objects be teleportable (by changing the if(other.CompareTag("Player")) line).

Collision for Amount of Time

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