how to make one script change a variable in another scipt

Questions & Answers
1

I want this script to change a variable in another script. The variable is called boxamount, in the script called Placegadget. this is what i have tried, but it won’t worke.

using UnityEngine;
using System.Collections;

public class Pickupgadget : MonoBehaviour {

void Update () {
	if (Input.GetKeyDown(KeyCode.E))
	    {
		Placegadget placegadget = GetComponent<Placegadget>();
		placegadget.transform.SendMessage("plus",SendMessageOptions.DontRequireReceiver);
	
Vector3 fwd = transform.TransformDirection(Vector3.forward);
		RaycastHit hit;
	
			if (Physics.Raycast(transform.position, fwd, out hit, 1.5f))
		{
			 Debug.DrawRay(transform.position, fwd, Color.green);
	
				hit.transform.SendMessage("PickMeUp",SendMessageOptions.DontRequireReceiver);
 }
}

}
}

2

I don’t see where is the variable you’re trying to change, so I’ll stay generic :

To access a variable of an object, you an instance and the right to access it (=> public/protected/private, to keep it simple). Make sure your boxamount is public.

Also, I see your accessing the component Placegadget from the same object, to SendAMessage. You don’t need to do that to a function from it. It wored, but you didn’t take the shortest way (Get the component, get it’s transform, send a message to every components of that object, the first component pick it up, execute) when you just need to call SendMessage from the script you wrote.

3

Here is an example how:

var objectWithTheScript : GameObject;
var theScript;

function Start() {
    theScript = objectWithTheScript.GetComponent("The Scripts Name");
}

function Update() {
    theScript.variableInTheScript = (whatever);
}

Now you can get much more complicated with that but that’s it really!