How can i modify a float in another script in C#?

Questions & Answers
1

well i know there’s a ton of questions about this but didnt really understand any of them. i simply want this script to say “when i left click, if the raycasted object is tagged enemy then set the enemy’s health to -33” but every way i try i get a lot of errors. any ideas?

here is the Raycast script:

using UnityEngine;
using System.Collections;

public class WeaponRaycast : MonoBehaviour {

	public GameObject Player;
	float isRay = 0;
	public GameObject bulletDecal;
	public GameObject Enemy;

	// Use this for initialization
	void Start () {

	}
	
	// Update is called once per frame
	void Update () {
		//Debug.Log(isRay);
		RaycastHit hit;
		if(Input.GetButtonDown("Fire1")){
			if(Physics.Raycast(Player.transform.position, Player.transform.forward, out hit, 20f)){
				if(hit.collider.gameObject.CompareTag("Enemy")){
					isRay = 1;
					Enemy.health = -50f;
				}
				else{
					Instantiate(bulletDecal, hit.point, Quaternion.FromToRotation(Vector3.forward, hit.normal));
					isRay = 0;
				}
			}
		}
		Debug.DrawRay(transform.position, transform.forward, Color.green);
	}	
}

and here is the Enemy script:

using UnityEngine;
using System.Collections;

public class Enemy : MonoBehaviour {

	public static float health = 100f;

	// Use this for initialization
	void Start () {
	
	}
	
	// Update is called once per frame
	void Update () {
		Debug.Log(health);
		if(health < 100f){
			Destroy(gameObject);
		}

	}
}
2

In your Raycast script, you define a variable, but it’s unassigned:

public GameObject Enemy;

Before you use it, you need to assign a value to it. Change this code:

if(hit.collider.gameObject.CompareTag("Enemy")){
    isRay = 1;
    Enemy.health = -50f;
}

to:

if(hit.collider.gameObject.CompareTag("Enemy")){
    isRay = 1;
    Enemy = hit.collider.GetComponent<Enemy>();
    if (Enemy != null) Enemy.health = -50f;
}

This gets a reference to the Enemy script on the object that was hit. If the reference is non-null, it sets the health to -50.