How to use a variable from another script?

Unity Engine
1

Hi!
I’ve been studying unity recently. And through few tutorials I found a problem.
I developed these 2 scripts below (PlayerController and ScoreManager). But I would like to create a statement in the ScoreManager scripting that checks if the player’s health is greater than 0.
I thought about creating a statement that says “if health is greater 0 then increase the score” but how do I access the player health through the ScoreManager script? How do I make a reference to the PlayerController and access the health?

The playercontroller script

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

public class PlayerController : MonoBehaviour
{
    private Vector2 targetPos;
    public float Xincrement;
    public float maxLeft;
    public float maxRight;
    public int health = 5;
    public float maxHeight;
    public float minHeight;
    public float speed;
    public float Yincrement;
    public int numberOfHearts;
    public Image[] hearts;
    public Sprite fullHeart;
    public Sprite emptyHeart;
    public GameObject gameOver;


    void Start()
    {
    }

    void Update()
    {
        if(health <= 0)
        {
            gameOver.SetActive(true);
            Destroy(gameObject);
        
        
        }


        for(int i = 0; i < hearts.Length; i++)
        {
            if(i < health)
            {
                hearts.sprite = fullHeart;
            }
            else
            {
                hearts.sprite = emptyHeart;
            }

            if (i < numberOfHearts)
            {
                hearts.enabled = true;
            }
            else
            {
                hearts.enabled = false;
            }
        }
     

        transform.position = Vector2.MoveTowards(transform.position, targetPos, speed * Time.deltaTime);


        if (Input.GetKeyDown(KeyCode.RightArrow) && transform.position.x < maxRight)
        {
            targetPos = new Vector2(transform.position.x + Xincrement, transform.position.y);
        }
        else if (Input.GetKeyDown(KeyCode.LeftArrow) && transform.position.x > maxLeft)
        {
            targetPos = new Vector2(transform.position.x - Xincrement, transform.position.y);
        }
        else if (Input.GetKeyDown(KeyCode.UpArrow) && transform.position.y < maxHeight)
        {
            targetPos = new Vector2(transform.position.x, transform.position.y + Yincrement);
        }
        else if (Input.GetKeyDown(KeyCode.DownArrow) && transform.position.y > minHeight)
        {
            targetPos = new Vector2(transform.position.x, transform.position.y - Yincrement);
        }
    }
}

The ScoreManager script

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

public class ScoreManager : MonoBehaviour
{
    public Text scoredacerto;
    public Text highScoreText;

    public float scoreCount;
    public float highScoreCount;

 

 

 
    // Start is called before the first frame update
    void Start()
    {
        if (PlayerPrefs.HasKey("Highscore"));
        {
            highScoreCount = PlayerPrefs.GetFloat("Highscore");
        }
     
    }

    // Update is called once per frame
    void Update()
    {
        if(scoreCount > highScoreCount)
        {
            highScoreCount = scoreCount;
            PlayerPrefs.SetFloat("Highscore", highScoreCount);
        }


        scoredacerto.text = "Score: " + scoreCount;
        highScoreText.text = "HighScore:" + highScoreCount;
    }

    private void OnTriggerEnter2D(Collider2D other)
    {
        if(other.CompareTag("Obstacle"))
        {
           scoreCount++;
        }
     
    }
}
2

Please refer to the first post in the forum to learn how to format your code for better readability here.

1 Like
3

In general the approach is to make a public reference to the script.

In your case you would make a public ScoreManager reference in the PlayerController, and then you have access to the ScoreManager’s public methods and fields.

I would recommend taking a moment to make an “AddPoints()” function inside your ScoreManager, and then your PlayerController would call that function instead of doing the math in the PlayerController, where the math doesn’t really belong:

public ScoreManager TheScoreManager;

and then

TheScoreManager.AddScore( points);
1 Like
4

Thanks for your help.
I really do appreciate it!
It worked just fine!
Thanks a lot!

1 Like