Falling object gravity interval of time

Question

I made this code where I have 8 objects and each object has this script, where between a random time interval the objects drop randomly

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 
 public class cylinderFallv2 : MonoBehaviour
 {
     private Rigidbody temp;
 
     // Start is called before the first frame update
     void Start()
     {
         temp = GetComponent<Rigidbody>();
         StartCoroutine(waitTime());
     }
 
     public IEnumerator waitTime() {
         temp.useGravity = false;
         float wait_time = Random.Range (3.0f;, 12.0f;);
         yield return new WaitForSeconds(wait_time);
         temp.useGravity = true;
     }
 
 }

what he intended was for the objects to fall one by one with an interval between them in a random order. any ideas?

What is the question? Isn't the objects falling, or are they falling in an unexpected order? — Andulf Games - Anders Bjerin, Dec 27 '21 at 20:27
yeah, i awnt they fall one-by-one, 1 second difference for example and in a random order. — mtpog093, Dec 27 '21 at 23:04

Andulf Games - Anders Bjerin · Accepted Answer · 2021-12-28T13:58:05.430

If you want to control several objects, and they have some relation to each other, it is usually best to have one script on any GameObject, and let that script handle the other objects. The following example script can be placed on any GameObject.

using System.Collections;
using System.Linq;
using UnityEngine;

public class RandomFall : MonoBehaviour
{
    public Rigidbody[] rigidbodies;
    public float minTime = 3.0f;
    public float maxTime = 12.0f;

    private void Start()
    {
        foreach (Rigidbody rigidbody in rigidbodies)
            rigidbody.useGravity = false;
        StartCoroutine(dropRandomly());
    }

    public IEnumerator dropRandomly()
    {
        foreach (var rigidbody in rigidbodies.OrderBy(r => Random.value))
        {
            float wait_time = Random.Range(minTime, maxTime);
            Debug.Log($"Waiting {wait_time:0.0} seconds...");
            yield return new WaitForSeconds(wait_time);
            Debug.Log($"Dropping {rigidbody.name}...");
            rigidbody.useGravity = true;
        }
        Debug.Log("All dropped!");
    }
}

You then have to add references to the objects you want to drop in the scene editor. It should look something like this (I have added four cylinders). Note that the objects you try to add must of course already have a Rigidbody component on them.

Instead of your copieng the list and `while` loop I would suggest using linq and do `foreach(var rigidbody in rigidbodies.OrderBy(r => Random.value))` that seems cleaner to me ;) — derHugo, Dec 28 '21 at 13:26
Indeed, much nicer - old habits here :). Thanks, I have updated the answer. — Andulf Games - Anders Bjerin, Dec 28 '21 at 13:56
if i do for example "float wait_time = time;" where time is 2.0f, shouldn't each cylinder drop every 2 seconds?? sometimes several fall at the same time. Ty tho for the help — mtpog093, Dec 28 '21 at 15:39
Yes, as long as you only have the script on one GameObject. I guess you have the script (or another old copy of the script) on two or more GameObjects. — Andulf Games - Anders Bjerin, Dec 28 '21 at 15:47

Falling object gravity interval of time

1 Answers1