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Game Development How to Make a Video Game Pickups Spawn Pickups Randomly

Posted by Sean Gwall
Sean Gwall
984 Points

No new flies spawning?

After I collect a fly in the game, a new one won't respawn?

using System.Collections; using System.Collections.Generic; using UnityEngine;

public class FlySpawner : MonoBehaviour {

// Variables
[SerializeField]
private GameObject flyPrefab;

[SerializeField]
private int totalFlyMinimum = 12;

[SerializeField]
private float spawnArea = 25f;

public static int totalFlies;


// Use this for initialization
void Start () {
    totalFlies = 0;

    //While the total number of flies is less then the minimum...
    while (totalFlies < totalFlyMinimum) {

        // Add 1 to totalFlies
        totalFlies++;

        // Create a random position for a fly
        float positionX = Random.Range(-spawnArea, spawnArea);
        float positionZ = Random.Range(-spawnArea, spawnArea);

        Vector3 flyPosition = new Vector3 (positionX, 2f, positionZ);

        // Create a new fly
        Instantiate(flyPrefab, flyPosition, Quaternion.identity);


    }

}

// Update is called once per frame
void Update () {


}

}

using System.Collections; using System.Collections.Generic; using UnityEngine;

public class FlyPickup : MonoBehaviour {

[SerializeField]
private GameObject pickupPrefab;

void OnTriggerEnter(Collider other) {

    // If the collider other is tagged with "Player"
    if (other.CompareTag ("Player")) {

        // Add the pickup particules
        Instantiate(pickupPrefab, transform.position, Quaternion.identity);

        // Remove 1 from the total number of flies
        FlySpawner.totalFlies--;

        Destroy (gameObject);


    }

}

}

nathanmendes
nathanmendes
6,929 Points
nathanmendes
nathanmendes
6,929 Points

Hey, I'm replying to this long after you posted it, but I'll reply just in case. All you need to do is move your while loop in your FlySpawner script from the start method to the update method. Otherwise the code is only calling the while loop once at the beginning of the game and not checking up again on the variables as the game progresses. Hope this helps!