instantiates in the same place

Question

I'm building a platformer, and I'm instantiating prefabs upwards, the problem is, that the prefabs can be instantiated on 1 another, causing multiple prefabs at the same spot, how can i generate them one AFTER another? there's my script, and its attached to a Quad attached to Main Camera using UnityEngine; using System.Collections;

 public class SpawnPlatfoms : MonoBehaviour {
     public GameObject[] obj;
     public float spawnMin = 1f;
     public float spawnMax = 2f;
     // Use this for initialization
     void Start () {
         spawn();
     }
     
     // Update is called once per frame
     void spawn(){
         Instantiate (obj [Random.Range (0, obj.Length )], transform.position, Quaternion.identity);
         Invoke ("spawn", Random.Range (spawnMin, spawnMax));
     }
 }

Answer 1

Answer by lordlycastle · Mar 30, 2015 at 06:42 PM

Don’t call a function from itself, that’s ridiculous. Put it in update if you want it go every frame indefinitely, or use loops; that’s what they are for, looping. If you want them to instantiate at different positions then just change the second argument of Instantiate.

 Vector3 lastObjSpawnPos = new Vector3()
 void spawn(){
     int index = Random.Range(0, obj.Lenght -1);
     //If objects are different sizes, they need a collider to get their size.
     lastObjSpawnPos.y += obj[index].GetComponent<Collider>().bounds.extends.y;
     //otherwise you can just use cached size
     lastObjSpawnPos.y += 2
     Instantiate (obj [index], transform.position + lastObjSpawnPos, Quaternion.identity);
 }

Add comment · Show 1 · Share

SirBoboHobo · Mar 30, 2015 at 07:00 PM 0

Share

ummmm... I have a collider on each object, but my prefabs are like $$anonymous$$i levels that randomly generate, so I don't have a collider on the whole prefab but only on pieces from it. can i get the collider that its y position is the highest and from that collider +2? and also, it gives me an error UnityEngine.Bounds doesnt contain the definition for 'extends', maybe you meant extents?

Answer 2

I don't understand your question perfectly. Do you want them to instantiate one after another and upwards? Then I think you should make Spawn as a Coroutine and wait after each spawn. Also you have to increase the y coordinate :

 public class SpawnPlatforms : MonoBehaviour
 {
     public int platformCount = 10;
     public GameObject[] obj;
     public float spawnMin = 1f;
     public float spawnMax = 2f;
     public float waitBetweenSpawns = 1f;

     // Use this for initialization
     void Start()
     {
         StartCoroutine(Spawn());
     }
 
     IEnumerator Spawn()
     {
         for (int i = 0; i < platformCount; ++i)
         {
             Instantiate(obj[Random.Range(0, obj.Length)], new Vector3(0, i * 3, 0), Quaternion.identity);
             Invoke("spawn", Random.Range(spawnMin, spawnMax));
             yield return new WaitForSeconds(waitBetweenSpawns);
         }
     }
 }

instantiates in the same place

2 Replies

Your answer

Welcome to Unity Answers

Follow this Question

Related Questions