I want to know how to wait before I can pick up something

Questions & Answers
1

Here’s my pickup code for my 2 items

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

public class ItemPickup : MonoBehaviour
{
    public Inventory inventory;
    private void OnTriggerEnter(Collider other)
{
    if (other.tag == "Rock")
    {
        inventory.rockAmount += 1;
        Destroy(other.gameObject);
    }
    if (other.tag == "Log")
    { 
        inventory.logAmount += 1;
        Destroy(other.gameObject);
    }
  }
}

And I want to know how to make it wait like 3 seconds before being able to pick up an item if I grabbed the other item

2

If we assume that you want to be able to sit on another item until you’re allowed to pick it up, it might look something like this:

public float pickupInterval = 3f;

// This can be set to -pickupInterval in Start() instead, based on preference
float lastPickupTime = Mathf.negativeInfinity;

// Check every frame, in case player is sitting on a pickup
void OnTriggerStay(Collider other)
{
	// If it's been at least interval-seconds since last pickup...
	if(Time.time - lastPickupTime > pickupInterval)
	{
		// Processes faster than ([tag] == "string")
		if(other.CompareTag("rock"))
		{
			inventory.rockAmount += 1;
			lastPickupTime = Time.time;
			Destroy(other.gameObject);
		}
		else if(other.CompareTag("Log"))
		{
			// etc.
		}
	}
}
3

I’m no expert on the best way to do this but I will give it a shot. Let me know if this works.

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

public class ItemPickup : MonoBehaviour
{
    public Inventory inventory;

    [SerializeField] private float delay = 3.0f; // this is the wait time
    private float timer = 0;
    private bool isPickingUp = false;

    private void OnTriggerEnter(Collider other)
    {
        // if you aren't currently picking something up
        if (!isPickingUp)
        {
            if (other.tag == "Rock")
            {
                inventory.rockAmount += 1;
                Destroy(other.gameObject);
                isPickingUp = true; // you are now picking something up
            }
            if (other.tag == "Log")
            {
                inventory.logAmount += 1;
                Destroy(other.gameObject);
                isPickingUp = true; // you are now picking something up
            } 
        }
    }

    private void Update()
    {
        Timer();
    }

    private void Timer()
    {
        // if you pick up item
        if (isPickingUp)
        {
            // timer increases gradually
            timer += Time.deltaTime;

            // if timer becomes greater than the delay
            if (timer > delay)
            {
                // you have finished picking up item
                isPickingUp = false;
                // reset the timer
                timer = 0;
            } 
        }     
    }
}