Ways to Unity 7: Global Scripts or Global Manager

The purpose

I just want to call a function every few seconds or minutes. How can do that?

The structure

You can just create an Empty Game Object from the right-click in the Hierarchy window.
Then attach a script to it.
For example, we rename the object to GlobalManager, rename the script to Manager.cs.

The code 

Well, for javascript, it has a function called setTimeout().
For c# in unity, it has a function called InvokeRepeating().

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

public class SpawnManager : MonoBehaviour
{
    public GameObject[] animalPrefabs;

    private float spawnRangeX = 20;
    private float spawnPosZ = 20;

    private float startDelay = 2;
    private float spawnInterval = 1.5f;

    // Start is called before the first frame update
    void Start()
    {
        InvokeRepeating("SpawnRandomAnimal", startDelay, spawnInterval);
    }

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

    void SpawnRandomAnimal()
    {
        int animalIndex = Random.Range(0, animalPrefabs.Length);
        Vector3 spawnPosition = new Vector3(Random.Range(-spawnRangeX, spawnRangeX), 0, spawnPosZ);
        Instantiate(animalPrefabs[animalIndex], spawnPosition, animalPrefabs[animalIndex].transform.rotation);
    }
}

The thinking

I think c# is different across different places. For example, what you use to make a windows application is different than you would use in Unity game development.

The man who wrote this

https://yingshaoxo.blogspot.com/2020/12/ways-to-unity-7-global-scripts-or.html

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