How to use OnTriggerEnter in a script used by multiple duplicate objects?

Unity Engine
1

Hello.

Is there a way for the OnTriggerEnter method to be used independently by duplicate objects using the same script? I want each of the objects to use the same OnTriggerEnter method but without creating a separate script for each. Right now the script is attached to all the duplicate objects but only gets called once.

Thanks.

2

I’m not sure I understand what you’re asking. Are you saying that if you have ten identical objects, and one of these objects collides with trigger X, you want to call a function on all ten objects?

3

Let’s say I have 10 identical block objects and a player object, I want the OnTriggerEnter method to execute for a single block when the player triggers it, even though that all 10 blocks use the same script. Here is what I have in my OnTriggerEnter method:

void OnTriggerEnter(Collider other) {
        if (other.tag == "MoveableBlock") {
            blocksLeft--;
            setBlocksLeft();
            Destroy(other.gameObject);
        }
}

Right now when the player triggers the method on a block for the first time, it runs the method fine, but when it triggers its second block, it does not decrement blocksLeft and only destroys the block.

4

Mark blocksLeft as static, so it’s shared between all instances, or store that information in another object all together.

1 Like
5

I would have another script that keeps track of the number of blocks. However…looking at this code, is this on the player?

6

Thank you so much. So it was not a problem with the OnTriggerEnter method but with the variable not being static to be shared among all instances of the object. I was searching for the wrong answer all along, thank you again!