Question Integer value from child to parent

Hello there

Here I have 2 scripts

The Parent

Code (CSharp):

1. public class car_onoff : MonoBehaviour
2. {
3.        public GameObject BRman;
4.        public int aval;
5.  
6.     void Update()
7.     {
8.      
9.  
10.         if(Input.GetKeyDown("z"))
11.          {
12.                 GetComponent<car_move1>().enabled = false;
13.                 BRman.SetActive(true);
14.                 BRman.GetComponent<charMove>().enabled = true;
15.  
16.                
17.          }
18.  
19.          else if(Input.GetKeyDown("x") && aval == 2)
20.          {
21.                 GetComponent<car_move1>().enabled = true;
22.                 BRman.SetActive(false);
23.                 BRman.GetComponent<charMove>().enabled = false;
24.                
25.          }
26.     }
27. }

For your information - when I press Z key the person should leave the car and control from car passes to person. When I press X , the person should get into the car IF it is on trigger area.



Child code

Code (CSharp):

1. public class checkTr : MonoBehaviour
2. {
3.    
4. public int aval;
5.  
6.     void OnTriggerEnter2D(Collider2D other)
7.     {
8.         if (other.gameObject.CompareTag("PersPlayer"))
9.         {
10.             aval = 2;
11.         }
12.     }
13.  
14.     void OnTriggerExit2D(Collider2D other)
15.     {
16.         if (other.gameObject.CompareTag("PersPlayer"))
17.         {
18.             aval = 3;
19.         }
20.     }
21. }
22.  

Triggers work well, but don't pass the integer value of aval to Parent.
I made this Parent/Child connection in order to move game objects and triggers together.

The question is, how to pass the integer value from child to parent ?

Thank you

 

After the if statement you need to get the parent's component (with transform.parent.getcomponent or with transform.getcomponentinparent)
Then you cah adjust the value of the parent

 

The same way as passing ANYTHING around:

Referencing variables, fields, methods (anything non-static) in other script instances:

https://forum.unity.com/threads/hel...-vars-in-another-script.1076825/#post-6944639

https://forum.unity.com/threads/accessing-a-gameobject-in-different-scene.1103239/

It isn't always the best idea for everything to access everything else all over the place. For instance, it is BAD for the player to reach into an enemy and reduce his health.

Instead there should be a function you call on the enemy to reduce his health. All the same rules apply for the above steps: the function must be public AND you need a reference to the class instance.

That way the enemy (and only the enemy) has code to reduce his health and simultaneously do anything else, such as kill him or make him reel from the impact, and all that code is centralized in one place.

As you might have noticed DevDunk, I have had a huge turn away from these dynamic things in the last year... I have just seen too much cost and confusion come out of them, especially in a team environment where others may be manipulating your scenes / prefabs. But yes, you certainly could use Get- and Find- type constructs, I just think they are over-used, especially in tutorial scripts, and a ton of people end up here going "I got a nullref!"

 

Fair enough. I mostly work alone or am the only developer, so I can get away with a lot (;

Definitely going to change when I get a job in a bit