How to enable a variable from one script to another?

Hey guys so basically I got 2 scripts. My first person controller is holding a piece of paper, but I disable it at the start since Unity can't find gameObjects that are disabled from the start. I got everything working except I can't enable it, this is my code:

Code (CSharp):

1. using UnityEngine;
2. using System.Collections;
3. public class CollisionWithPlane : MonoBehaviour
4. {
5.    
6.  
7.     void OnTriggerExit(Collider coll)
8.    {
9.        if (coll.GetComponent<PickUpItem>().isKeyPickedUp)
10.        {
11.            Debug.Log("true");
12.  
13.            transform.position = new Vector3(56f, 0.064f, 94f);
14.        }
15.    }
16.     void OnTriggerEnter(Collider col)
17.     {
18.         if (col.GetComponent<PickUpItem>() != null && col.GetComponent<PickUpItem>().isKeyPickedUp)
19.         {
20.             Debug.Log("Pause");
21.             //This will disable the MouseLook script
22.             MouseLook.instance.enabled = false;
23.             //This will disable the CharacterMotor script
24.             CharacterMotor.instance2.enabled = false;
25.             //This will disable the FPSInputController script
26.             FPSInputController.instance1.enabled = false;
27.             //here is where I try to enable the script. I make a instance of the other class, and the variable is called "sign"
28.             PickUpItem inst = new PickUpItem();
29.             inst.GetComponent<MeshRenderer>().enabled = true;
30.         }      
31.     }
32. }
33.  

 

you can't get the component of a component... that makes no sense.

Is PickUpItem a gameobject or a component? for the majority of that script you're dealing with it as a component, then you try to create a new object of that class and then get a component on that object (that isn't the way you create components, and again, components don't have components you access in that manner).

Perhaps you could explain the hierarchy you have... ?

 

PickUpItem is a script. Here it is

Code (CSharp):

1. using UnityEngine;
2. using System.Collections;
3. public class PickUpItem : MonoBehaviour
4. {
5.     public bool isKeyPickedUp = false;
6.  
7.     public static CharacterController cc;
8.     // Update is called once per frame
9.  
10.     public static GameObject sign;
11.  
12.     void Awake()
13.     {
14.         sign = GameObject.Find("QuickPause");
15.         sign.GetComponent<MeshRenderer>().enabled = false;
16.     }
17.  
18.     void Update()
19.     {
20.         //this is the raycast variable for detecting the key
21.         RaycastHit hitBox;
22.         //if the phyiscs raycast its position looking forwardm hitbox to store the data and a length of 2
23.         if (Physics.Raycast(transform.position, transform.forward, out hitBox, 2))
24.         {
25.             //if the raycast is hitting the tag key and pressing r and iskeypickedup is false then
26.             if (hitBox.collider.gameObject.tag == "Key" && Input.GetKeyDown(KeyCode.R) && isKeyPickedUp == false)
27.             {
28.                 print("HELLO");
29.                 //find the key destroy it
30.                 GameObject keyObject = GameObject.Find("Key");
31.                 GameObject.Destroy(keyObject);
32.  
33.                 //this is true now since the key is picked up
34.                 isKeyPickedUp = true;
35.  
36.                 print("door destroyed!");
37.                 //find bedroom door destroy it
38.                 GameObject BedroomDoor = GameObject.Find("OBedroomDoor");
39.                 GameObject.Destroy(BedroomDoor);            
40.             }
41.         }            
42.     }    
43. }

 

if the MeshRenderer is on the same object like your PickUpItem script, than you can do

Code (CSharp):

1. void OnTriggerEnter(Collider col)
2.     {
3.         if (col.GetComponent<PickUpItem>() != null && col.GetComponent<PickUpItem>().isKeyPickedUp)
4.         {
5.             Debug.Log("Pause");
6.  
7.             MouseLook.instance.enabled = false;
8.  
9.             CharacterMotor.instance2.enabled = false;
10.  
11.             FPSInputController.instance1.enabled = false;
12.  
13.             col.GetComponent<MeshRenderer>().enabled = true;
14.         }    
15.     }

why you have instance1 , instance2 ? strange

 

Code (csharp):

1.  
2. col.GetComponent<PickUpItem>().sign.GetComponent<MeshRenderer>().enabled = true;
3.  

really should just make a function on the pickupitem to handle it, huge opening for a null ref exception here

 

You actually can. Why is a little more esoteric. But you can call GetComponent on any Component or GameObject.

 

Well, when you call GetComponent on a component, it's actually being called on that components gameObjects. So think of it as 'GetSiblingComponent'

 

There is a plane attatched to my first person controller, which has the meshrender on it. Which 'm trying to enable back.

 

if you're disabling a mesh renderer or a component on your object use

Code (CSharp):

1. gameObject.GetCompnent<MeshRenderer>().enabled = true; // or false

if the script is not attached to the object you have to make sure to make a GameObject variable and set it to the object with the mesh renederer. Or if it's on a parent or child object you have to use getComponentInParent or GetComponentInChildren

also if that plane has a collider you might want to disable that to. (do the same thing but instead of mesh renderer use your collider component)

 

Ok thanks