1

I have always had trouble with doing this - calling variables from another script.

I have a c# script that calculates gold, and a c# script for enemy AI, including a health variable, etc… What I want, is when the enemy’s HP goes down to 0 or below, a certain amount of gold is given to the player. That means, accessing the gold script and adding an amount to the total gold.

How can I do this?
Thanks in advance!

5

You don’t need to have a static variable to do this. For example: Let’s say you have a gameObject named “Player1”, and another one named “Enemy1”. Enemy1 has a script called “EnemyHealth”. To access this, you first access the gameObject, then the script on the object, then the variable “hp” from that EnemyHealth script. This would work like so:

using UnityEngine;
using System.Collections;

public class Example : MonoBehaviour
{
    GameObject Enemy1;
    int enemyHP;
    int increment = 100;
    
    
    void Update()
    {
        if(GameObject.Find("Enemy1"))
        {
            Enemy1 = GameObject.Find("Enemy1");
            enemyHP = Enemy1.GetComponent<EnemyHealth>().hp;
            if(enemyHP <= 0)
            {
                GetComponent<GoldClass>().gold += increment;
                Destroy(Enemy1);
            }
        }
    }
}

This isn’t specific because it is just an example. This simply focuses on how to access a variable from a script on another gameObject without needing to use static (single instance) variables. Click here for more information on GetComponent

2

int other = gameObject.GetComponent(ScriptName).newNo;
Another method : Make into

public static int newNo;

Get variable as

int otherNo = ScriptName.newNo;

Another method is that you can make into playerprefs

PlayerPrefs.SetInt("PlayerScore", 10);

And get as

PlayerPrefs.GetInt("PlayerScore");
3

You have multiple possibilities:
You can add a public method to the gold script:

public void AddGold (int amount)
{
    this.gold += amount;
}

That allows a controlled gold management, but isn’t the most simple way.

You can also make the variable “gold” public so that the script can directly access the variable. But that isn’t a very clean way (but it works).

To access the method or public field, you can use:

// Get the script that manages the gold of the player
var gScript = (GoldScript)player.GetComponent("GoldScript");
// If you choose the way with the public field, use this line to add gold
gScript.Gold += 50;
// Else use this line of code
gScript.AddGold(50);

“GoldScript” is the script that manages the gold
“player” is the gameobject that contains the script

Hope I was able to help.

Greetings
Chillersanim

4

Although the answers above are acceptable, if you know that there is only one GoldScript in the scene you could use a singleton pattern and call

GoldScript.instance.Gold += 50

or whatever mechanism you use.