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Question by nemerala · Feb 17, 2014 at 12:48 AM · spawnissue

Problem with spawning script

Hi im working on a game which spawns obstacles the player has to jump through. i couldnt find an of these problems online so i decided to ask here. The problem is that the obstacles spawn higher then the ground that i've made.

[1]: /storage/temp/22279-untitled-1.jpg

I also have a problem with the same obstacle spawning up to (x) times in a row, i want it so that the obstacles doesnt spawn twice in a row. this is the script im using so far.

 using UnityEngine;
 using System.Collections;
 
 public class SpawnScript : MonoBehaviour {
 
     
     public GameObject[] obj;
     public float spawnMin = 1f;
     public float spawnMax = 2f;
     
     // Use this for initialization
     void Start () {
         Spawn();
     }
     
     void Spawn()
     {
         Instantiate(obj[Random.Range (0, obj.GetLength(0))], transform.position, Quaternion.identity);
         Invoke ("Spawn", Random.Range (spawnMin, spawnMax));
     }
 }

If there is a tutorial on this it would be much appreciated. Thank you for your help

untitled-1.jpg (178.2 kB)
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Answer by mattyman174 · Feb 17, 2014 at 01:13 AM

You need to keep a reference to the previously spawned Obstacle so that when you want to Instantiate a new one, you can check that the new Obstacle is not the same as the previous one.

 private int previousObstacleIndex = -1; //Not 0 so we dont discount the first Array Element.
 private int currentObstacleIndex;

 void Spawn()
 {
     currentObstacleIndex = Random.Range(0, obj.GetLength(0));

     if (previousObstacleIndex != currentObstacleIndex)
     {
         Instantiate(obj[currentObstacleIndex], transform.position, Quaternion.identity);
         previousObstacleIndex = currentObstacleIndex;
     }

     Invoke("Spawn", Random.Range(spawnMin, spawnMax));
 }
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