Make script affect multiple objects simultaneously

Unity Engine
, ,
1

Hi! I am still quite a noob when it comes to coding with C#.
I was designing this game, where the player basically cuts grass.

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

public class tool : MonoBehaviour
{



    private SpriteRenderer sprite;
    private BoxCollider2D bcollider;
    public float timer = 0f;
    public float GrowTime = 20.0f;
    public float maxSize = 1f;

    public float score;
    public Text scoretext;
    private GameObject grass;
   

    public bool isMaxSize = false;
    // Start is called before the first frame update
    void Start()
    {
       
      
       
    }

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

    }

    private void FixedUpdate()
    {
        UpdateScore();
    }

    private IEnumerator Grow()
    {
        Vector2 startScale = grass.transform.localScale;
        Vector2 maxScale = new Vector2(maxSize, maxSize);

        do
        {
            grass.transform.localScale = Vector3.Lerp(startScale, maxScale, timer / GrowTime);
            timer += Time.deltaTime;
            yield return null;
        }
        while (timer < GrowTime);

        isMaxSize = true;
    }

 


    public void cooldown()
    {
        grass.GetComponent<BoxCollider2D>().enabled = true;
    }
   

    public void AddScore(int newScore)
    {
        score += newScore - 1;
    }
    public void UpdateScore()
    {
        scoretext.text = "" + score;
    }
    public void grassrepsawn()
    {
       
        grass.GetComponent<SpriteRenderer>().enabled = true;
        timer = 0f;
        StartCoroutine(Grow());
        Invoke(nameof(cooldown), 20f);




    }


    private void OnTriggerEnter2D(Collider2D collision)
    {
        if (collision.gameObject.tag == "grass")
        {
            score = score + 1;
            print("grasscutted");
            grass = collision.gameObject;
            collision.gameObject.GetComponent<BoxCollider2D>().enabled = false;
           
            collision.gameObject.GetComponent<SpriteRenderer>().enabled = false;
          
            collision.gameObject.transform.localScale = new Vector3(0.001f, 0.001f, 0.001f);
           


          
            isMaxSize = false;

            Invoke(nameof(grassrepsawn), 2.0f);

        }
    }
   

}

This script is inside the hitbox of the tool that the player is holding.
My problem is that when I cut a piece of grass, the code works like normal, but when i try to cut another piece of grass while the first one is still not done growing back, everything breaks.
Does anyone here have suggestions on how to make the script complete fully for each grass block, and not break when another one is cut?
I know the script is messy, sorry about that.
Thank you!

2

I would start with any of the “farming game” or “harvesting stuff” kinda tutorials for Unity3D.

You might even get some good insight from “open door” tutorial, as causing a door to open is analogous to causing a piece of grass to be destroyed: it’s a random thing you walk up to, identify, begin interacting, and wait until you’re done interacting.

The basics will involve identifying the thing you are interested in (by collider, trigger, coordinate check or any of other methods), then initiating some kind of animation to harvest it, then changing its look to be harvested.

An awful lot of that isn’t going to be simply code but rather very specific and precise prefab and scene setup, so it isn’t really going to be describe-able much more in this little text box.

3

When your tool cuts the grass it can place a GrassGrow script onto the grass sprite if one isn’t already present. The script then removes/destroys itself once the grass has fully grown back.

4

That is a good idea but I do not know how to implement it.
You could explain how one adds a script to a gameobject inside a script?
Thank you!

5 
    private void OnTriggerEnter2D(Collider2D collision)
    {
        if (collision.gameObject.tag == "grass")
        {
            score = score + 1;
            print("grasscutted");
            grass = collision.gameObject;
            grass.GetComponent<BoxCollider2D>().enabled = false;
            grass.GetComponent<SpriteRenderer>().enabled = false;
            grass.transform.localScale = new Vector3(0.001f, 0.001f, 0.001f);
            if (!grass.GetComponent<GrassGrow>()) // if grow script isn't present..
                grass.AddComponent<GrassGrow>(); // add it..
        }
    }
6

Alright thank you!