Randomise Prefab Position Unity

Question

im creating a game where the player needs to find and pick up a certain number of keys. Currently ive got a spawn container that generates 5 keys in given locations. I want to be able to generate the 5 keys in 5 random locations. So lets say i have 10 spawn points, i want it to randomly pick any of the 5 points and place a key there.

I have the following code so far

  using UnityEngine;
using System.Collections;

public class KeySpawnManager : MonoBehaviour 
{
    // array to store spawnpoints
    private Transform[] spawnTransformList;

    // integer to store number of spawnpoints
    private int numberOfSpawnpoints;

    // the prefab we're going to spawn
    public GameObject prefab;

    private int collectedCount = 0;

    private int currentTime = 0;


    // Singleton Instance
    public static KeySpawnManager Instance { get; private set; } 

    // AWAKE Function - fired on initialization
    void Awake () 
    {
        if (Instance == null) Instance = this;
        else Destroy( gameObject ); 

        numberOfSpawnpoints = transform.childCount;

        spawnTransformList = new Transform[numberOfSpawnpoints];

        for (int i = 0; i < numberOfSpawnpoints; i++) 
        {
            // add the spawn to the array
            spawnTransformList[i] = transform.GetChild(i); // return transform Component of each child object
        }

        for (int j = 0; j < numberOfSpawnpoints; j++)
        {
            GameObject newPrefab = (GameObject) Instantiate(prefab, spawnTransformList[j].position, spawnTransformList[j].rotation);

            newPrefab.transform.parent = transform.position;
        }

    }


}

Any ideas on how to do this? thanks

what is it exactly that your code does and what is it that your code cant do? — Milad Qasemi, Apr 29 '16 at 05:59
So ive created 5 empty game objects, and the code above spawns a key prefab in the position of each empty game object. Im trying to change it to 10 empty game objects but it only spawns 5 keys and choses a random one of the 10 empty objects — Kingspud, Apr 29 '16 at 06:00

score 2 · Answer 1 · edited May 23 '17 at 12:23

2

create your ten empty gameobject in a list then shuffle the list using Fisher-Yates shuffle then use the first five elements of the list and spawn keys in them

Here is the implementation of a Fisher-Yates shuffle in c#

edited May 23 '17 at 12:23

Community

1
1

answered Apr 29 '16 at 06:18

Milad Qasemi

3,011
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score 0 · Answer 2 · answered Apr 29 '16 at 06:08

0

Create a random method using random class that you can pass in the total number of spawn points. Have it return then index for your spawn location.

answered Apr 29 '16 at 06:08

Codyj110

548
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Randomise Prefab Position Unity

2 Answers2