CODEWITHSUNDEEP
c#androidunity-game-engine
user5677145
user5677145

Reputation:

Spawning game object unity (C#)

I writing simple runner game.

I have game object (quad).

I want it to generate.

I wrote spawnscript:

    using UnityEngine;
using System.Collections;

public class SpawnScript : MonoBehaviour {


    public GameObject[] obj;
    //public GameObject obj;
    public float spawnMin = 1f;
    public float spawnMax = 2f;

    // Use this for initialization
    void Start () {


        Spawn();


    }

    void Spawn()

    {
        //for (int i = 0; i < 10; i++)
          //  Instantiate(obj, new Vector3(i * 2.0f, 0, 0), Quaternion.identity);
         Instantiate(obj[Random.Range(0, obj.GetLength(0))], transform.position, Quaternion.identity);
        Invoke("Spawn", Random.Range(spawnMin, spawnMax)); 

    }
}

But my quad spawning one time.I need it to spawn multiple times.

Where is my problem?

Upvotes: 1

Views: 1180

Answers (2)

Muhammad Faizan Khan
Muhammad Faizan Khan

Reputation: 10551

Use InvokeRepeating instead of Invoke in start event:

// Invokes the method methodName in time seconds, then repeatedly every   repeatRate seconds.
InvokeRepeating("Spawn", 3, 3);

If you do InvokeRepeating("Function", 1.0f, 1.0f), it will call Function one second after the InvokeRepeating call and then every one second thereafter. Hence, you can control the spawn timings.

Update

As asked in comments:

You can also cancel InvokeRepeating any time by calling below code. More information here.

CancelInvoke("Spawn");

Upvotes: 2

Barış &#199;ırıka
Barış &#199;ırıka

Reputation: 1570

There is no problem with code. All GameObjects instantiated same position so you can use code below: 

public float spawnDistanceFactor = 2f; //Value is your choice. You can change it.
void Spawn() 
{ 
     float startPosX = 0f; // I assume your camera look at 0,0,0 point.
     for (int i = 0; i < 10; i++){ 
         Vector3 spawnPos = new Vector3(startPosX,0f,0f);
         Instantiate(obj, spawnPos, Quaternion.identity); 
         startPosX+=spawnDistanceFactor;
     }

}

It is only moves positions on X axis you can move it x,y,z.

Also

You can use Random function for moving spawn position

public float randomMin = 2f;
public float randomMax = 4f;
void Spawn() 
{ 
     float startPosX = 0f; // I assume your camera look at 0,0,0 point.
     for (int i = 0; i < 10; i++){ 
         Vector3 spawnPos = new Vector3(startPosX,0f,0f);
         Instantiate(obj, spawnPos, Quaternion.identity); 
         float randomX = Random.Range(randomMin,randomMax);
         startPosX+=randomX;
     }

}

You can do a lot of things.

For destroying prefabs you can add Destroy script to object (You should create prefab with script) Like:

void DestroyObject(){
     Destroy(this.gameObject);
}

or use list to hold pointers to the GameObjects. Like:

using System.Collections.Generic;      // For list

private List<GameObject> objectList;
public float randomMin = 2f;
public float randomMax = 4f;

void Start(){
  objectList = new List<GameObject>();
  Spawn();
}
void Spawn() 
{ 
     objectList.Clear();     ///For multiple spawn purpose dont dublicate items.
     float startPosX = 0f; // I assume your camera look at 0,0,0 point.
     for (int i = 0; i < 10; i++){ 
         Vector3 spawnPos = new Vector3(startPosX,0f,0f);
         GameObject newObject = Instantiate(obj, spawnPos, Quaternion.identity) as GameObject; 
         objectList.Add(newObject);
         float randomX = Random.Range(randomMin,randomMax);
         startPosX+=randomX;
     }
} 

void DestroyObject(){
     for(int i=0;i<objectList.Count;i++){
         Destroy(objectList[i]);
     }
}

Upvotes: 0

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