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Question by jortd · Sep 29, 2017 at 03:15 PM · c#

Change script variable of object in hierarchy using c#

So, I made this little 2 player 1 keyboard game and i'm currently working on powerups for increasing speed for a certain time etc.

That all works fine, except that both players get the effect because i'm using a Game Manager to spawn the players and declare the rounds etc.

Does any1 know how I can access that object that collides with the power up and increase a variable on a script that both players have but only change the value of 1 player(the one that collides with it)

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Answer by YoucefB · Sep 30, 2017 at 12:49 PM

You need to use tags for this (https://docs.unity3d.com/Manual/Tags.html)

Here is an exemple:

 // attach this to your player Prefab.
     public class player : MonoBehaviour{
     int powerAmmount = 0; 
     int powerToAdd = 10; // when colliding with object this ammount will be added
 
         void OnCollisionEnter (Collision col) // replace it with "void OnCollisionEnter2D(Collision2D col)" for 2D Collisions
         {  
             if (col.gameObject.tag == "PowerUp") { // add "PowerUp" tag to the powerUp gameObject
                 powerAmmount += powerToAdd;
 
                 // destroy the powerUp Object
                 Destroy (col.gameObject);
             }
         }
 
     }

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Answer by FortisVenaliter · Sep 29, 2017 at 04:44 PM

However you're detecting the collision currently should return a reference to the collided object.

Since you've included no code or detail, that's about as specific of an answer as I can provide.

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