Spawn Question

Hi ,I have some strange issues with the spawn of my ball i don't know why when I collide with the ground insted o 1 ball 1000 of balls appear .What Can i do?

Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using UnityEngine;
4.  
5. public class RespawnFromGround : MonoBehaviour {
6.     public GameObject Ball;
7.  
8.  
9.     private float minX = -2.65f, minY = -2.40f, maxX = 7.0f, maxY = 3.21f;//This position are the minimux and maximum value where the ball will be spawned
10.     // Use this for initialization
11.     IEnumerator Respawn(){
12.         yield return new WaitForSeconds (2f);
13.         GameObject Clone=Instantiate (Ball, new Vector3 (Random.Range (minX, maxX), Random.Range (minY, maxY), 0), Quaternion.identity)as GameObject;//We instatiate the object ball randomly
14.  
15.     }
16.     void OnCollisionEnter2D(Collision2D target)
17.     {
18.         if (target.gameObject.tag == "Ball")
19.         {
20.             Debug.Log("collisone");
21.             StartCoroutine (Respawn ());
22.             Debug.Log("partira");
23.         }
24.     }
25. }

 

When a new ball is spawned, it immediately collides with the floor, which spawns another ball. Which immediately collides with floor. Etc.

One solution would be to keep track of the last ball that was spawned and when it was spawned. If the new collision is that same ball and it's been less than say 0.25 seconds, then don't spawn another one.

Code (csharp):

1. private GameObject lastSpawned;
2. float timeLastSpawned;
3. IEnumerator Respawn(){
4.         yield return new WaitForSeconds (2f);
5.         lastSpawned=Instantiate (Ball, new Vector3 (Random.Range (minX, maxX), Random.Range (minY, maxY), 0), Quaternion.identity)as GameObject;//We instatiate the object ball randomly
6. timeLastSpawned = Time.time;
7.     }
8.  
9. void OnCollisionEnter2D(Collision2D target)
10.     {
11.         if (target.gameObject.tag == "Ball" && !(target.gameObject == lastSpawned && Time.time < 0.25 + timeLastSpawned) )
12.         {
13. // etc

 

Hi and thanks for your reply i ve tried you suggestions but nothing has changed after the collision i have 6/7 ball clones

 

That's probably due to the fact that onCollison is calling multiple times.

 

Ok man thanks so how can i avoid the collision go on?

 

This might help:
https://answers.unity.com/questions/738991/ontriggerenter-being-called-multiple-times-in-succ.html

 

Another idea comes to mind. If this new ball is going to be used to go up in the air and come back down, have a variable on it that's set to 'BeenUp = false' or something. Now, when it leaves the ground set it to true and only allow the respawn to happen if BeenUp is true.
(This response is given with a little bias towards imaging the OP is shooting basket balls , based on a previous private conversation..)

If you describe the game play situation a little bit, Simon, people might have a better understanding