OnCollisionEnter function problem. JS

Questions & Answers
1

Hi, Im have a game object with lots of children (as a 2d person with ‘limbs’ containing rigid bodies) and an object which hits it, but i need to detect when the collision occurs.

I am using the following script:

#pragma strict

function Start (){

}

function Update (){
var other : Collision;
OnCollisionEnter(other);

}

function OnCollisionEnter(other : Collision){
if (other.gameObject.name == “character”){
Debug.Log(“Smash”);

	}

}

The problem is that firstly, I get an error saying the if(other.gameObject.name == “character”) line ‘object reference not set to an instance of an object’, and also the function doesn’t work as the Debug.Log isn’t activated when the objects collide. I have tried using tags and the name of the whole character with the children inside, but the problem persists, any ideas? cheers guys :slight_smile:

2

This part seems like a very bad idea:

function Update ()
{
    var other : Collision; 
    OnCollisionEnter(other);
}

Firstly, you should probably avoid calling collision functions from your own code – how will you distinguish between those calls and actual collisions?

Secondly, you’re passing in a null reference, which seems to be causing that error you’re getting.

3

Of course! Seems so obvious now, I think I saw that on someone else’s script and copied it across… Thanks a lot I’ll sort it in the morning and let you know if it works, thanks for the quick response.