OnTriggerEnter not working

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Hey there. I'm pretty new to Unity but I am learning how to code now. The problem is the "OnTriggerEnter" function is not working. It doesn't even change color. I got the code from a youtube tutorial so I know it works. Heres the part of the code.

function OnTriggerEnter(other : Collider){

Answer 1

Answer by ryleigh · Sep 20, 2012 at 08:03 AM

Do you have a Rigidbody component on one of the two objects? I believe at least one of them needs to have one.

"Note that trigger events are only sent if one of the colliders also has a rigid body attached." http://docs.unity3d.com/Documentation/ScriptReference/MonoBehaviour.OnTriggerEnter.html

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Answer 2

Answer by jonm4y · Mar 26, 2013 at 10:41 AM

OK, sorry I'm jumping on the band wagon a bit here...but I have just run into this problem myself!

heres the code im using:

var Sound : AudioClip; function OnTriggerEnter(){ audio.PlayOneShot(Sound); }

I have been following this tutorial on activating sound with a trigger: http://www.youtube.com/watch?v=fIGEPFjm4xQ

I followed exactly as he does, but when it comes to entering the code, (at 3:01) my OnTriggerEnter wont change blue. (and consequently doesn't work)

Any ideas?

Oh and I've tried adding a Rigidbody on as mentioned above and that doesn't work either.

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Answer 3

Answer by guavaman · Sep 20, 2012 at 08:36 AM

Check this link out: Unity3D Documentation - Physics

Scroll down to the section "Collision action matrix". This chart will tell you what types of colliders can set off the different trigger types.

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Answer 4

Answer by unityisfun · May 19, 2013 at 03:35 AM

I just ran into this problem as well. In Hierarchy view, I have a parent object with one child object with the same name. Looks like I inadvertently assigned the script handling the OnTriggerEnter event to the parent object, but the collider to the child object. Adding collider to the parent object fixed it. I'm still very new, but I am surprised that having an OnTriggerEnter event in a script attached to object without collider does not generate a compile error or warning message.

(Unity Version 4.1.2f1)

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whydoidoit · May 19, 2013 at 06:26 AM 1

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Nope it will never generate a warning or error, because that's not how Unity operates with its component model. At any moment during gameplay you could add a collider or remove a collider or add a rigidbody to that object (or enable or disable them).

whydoidoit · May 19, 2013 at 07:15 AM 1

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I should point out that your could flag your script as [ReqiureComponent(Some$$anonymous$$indOfCollider)] and it will forcibly add one for you when you attach the script if the component is not found...

Answer 5

Answer by HernandoNJ · Oct 07, 2021 at 02:13 AM

Maybe it helps

https://answers.unity.com/questions/1474449/ontriggerenter-not-working-26.html?childToView=1864967#answer-1864967

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OnTriggerEnter not working

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