How I do spawn prefabs as children of another game object?

Question

I am trying to spawn prefabs as the children of another game object so that object's transform will affect the spawned prefabs as well. I appreciate any help.

Here is my code so far:

using UnityEngine; using System.Collections;

public class Spawner : MonoBehaviour { public GameObject[] testObject; public float xRange = 1.0f; public float yRange = 1.0f; public float minSpawnTime = 1.0f; public float maxSpawnTime = 10.0f;

 // Use this for initialization
 void Start () 
 {
     Invoke ("SpawnItem", Random.Range (minSpawnTime, maxSpawnTime));
 }
 
 // Update is called once per frame
 void SpawnItem () 
 {
     float xOffset = Random.Range (-xRange, xRange);
     float yOffset = Random.Range (-yRange, yRange);
     int spawnObjectIndex = Random.Range (0, testObject.Length);
     Instantiate (testObject [spawnObjectIndex], transform.position + new Vector3 (xOffset, yOffset, 0.0f), testObject [spawnObjectIndex].transform.rotation);
     testObject [spawnObjectIndex].transform.parent = transform; 
     Invoke ("SpawnItem", Random.Range (minSpawnTime, maxSpawnTime));
 }

}

Answer 1

Answer by PaulOrac · Aug 16, 2014 at 05:26 PM

 You are assiging the prefab as parent and not the Instance of the object you have spawned, you where close anyways, try whith this tiny modification

 using UnityEngine; 
     using System.Collections;
     
     public class Spawner : MonoBehaviour { 
     public GameObject[] testObject; 
     public float xRange = 1.0f; 
     public float yRange = 1.0f; 
     public float minSpawnTime = 1.0f; 
     public float maxSpawnTime = 10.0f;
     
     // Use this for initialization
     void Start () 
     {
         Invoke ("SpawnItem", Random.Range (minSpawnTime, maxSpawnTime));
     }
      
     // Update is called once per frame
     void SpawnItem () 
     {
         float xOffset = Random.Range (-xRange, xRange);
         float yOffset = Random.Range (-yRange, yRange);
         int spawnObjectIndex = Random.Range(0, testObject.Length);
         GameObject goInst = (GameObject) Instantiate (testObject [spawnObjectIndex], transform.position + new Vector3 (xOffset, yOffset, 0.0f), testObject [spawnObjectIndex].transform.rotation);
          goInst.transform.parent = transform;
         Invoke ("SpawnItem", Random.Range (minSpawnTime, maxSpawnTime));
     }
     }

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Servebot · Aug 16, 2014 at 05:38 PM 0

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So I tried this and got an error - error CS0266: Cannot implicitly convert type UnityEngine.Object' to UnityEngine.GameObject'. An explicit conversion exists (are you missing a cast?)

PaulOrac · Aug 16, 2014 at 05:40 PM 0

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Veeeery sorry my friend I was indeed missing a cast hehe. I have just edited it. $$anonymous$$y apologies!

Servebot · Aug 19, 2014 at 03:02 AM 0

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So I tried the changes, but not it isnt spawning anything at all anymore.

Servebot · Aug 19, 2014 at 09:07 PM 0

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Got it working, thanks everyone!

Answer 2

Answer by smoggach · Aug 16, 2014 at 04:55 PM

If you want your offsets to be affected by the parent position Instantiate them at Vector3.zero instead. Then afterwards apply your offsets to testObject.transform.localPosition

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How I do spawn prefabs as children of another game object?

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