How to make random generation of objects according to the coordinates given in the unity array?

Question

C++ / C#

There are certain places where objects are false, but there are more places than objects and they have coordinates. please tell me how to make random generation of items in predefined places in Unity????
for example, write the coordinates of places into an array, and randomly create objects in some of these places, for example, in 5 out of 10 places, how to implement this ???

Answer 1

In general, it's as easy as shelling pears
- as I understand it, you know how to create objects.
- how to create a list of coordinates too
The code is not exact, but simply show the principle
- cycle - by the number of objects that we want to generate.
- selects a random position in the list
- generate an object in this position
- delete this position from the list

for(i=0;i<NeededNumdersOfObject;i++)
{
     int randomNumber = RandomRange(0,listOfTransforms.Count);
     Instantiate(Object,listOfTransforms[randomNumber ].position,....);
     listOfTransforms.RemoveAt(randomNumber)
}

just make sure there are more placement points in the list than the number of objects you want to generate.
and you can also make a copy of the list, since after deleting elements from it during the generation process, you no longer use it again.

Answer 2

If you combine everything that was written here, it will turn out like this. It seems compact and works with a bang.

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

public class Spawner : MonoBehaviour
{
    public List<Transform> spawnPoints = new List<Transform>();
    public List<GameObject> lootPrefabs = new List<GameObject>();
    public int amountEnemies = 5;

    private void Start()
    {
        SpawnEl();
    }

    public void SpawnEl()
    {
        for(int i=0; i < amountEnemies; i ++){
            int randomNumber = Random.Range(0,spawnPoints.Count);
            GameObject loot = SpawnLoot(spawnPoints[randomNumber]);
            spawnPoints.RemoveAt(randomNumber);
            }
    }
    private GameObject SpawnLoot(Transform spawnPoint)
    {
       var prefab = lootPrefabs[Random.Range(0, lootPrefabs.Count)];
        return Instantiate(prefab, spawnPoint.position, spawnPoint.rotation);
    }
}