onCollisionEnter doesn't work without RIgidbody?

Question

Hi, I am trying to check the collision between two colliders and OnCollisionEnter() doesn't work unless one of the object is RigidBody. I can't use Rigid Body for all the objects as it's a way expensive....

Also tried with trigger and it doesn't work without Rigidbody too.... Anyone helps me..

Answer 1

Best Answer

Answer by Eric5h5 · Nov 07, 2010 at 06:17 AM

Correct. As shown in the docs, in order for anything to generate OnCollision events, one of the two objects involved must be a rigidbody. There's no way around that. You don't put a rigidbody on everything, just the objects that move.

Add comment · Show 5 · Share

Thet Naing Swe · Nov 07, 2010 at 07:22 AM 0

Share

So.. How about doing something like strategy games? there will be hundreds of moving characters and putting rigidbody on each character will be alot expensive.

Eric5h5 · Nov 07, 2010 at 01:20 PM 0

Share

Strategy games are typically done using a grid, so you can check the grid position of each character in an array ins$$anonymous$$d of using physics.

Thet Naing Swe · Nov 08, 2010 at 06:16 AM 0

Share

Thanks.. I will try to calculate using grid...

giantkilleroverunity3d · May 08, 2020 at 02:27 AM 0

Share

But I need two colliders to tell me when they collide. One is a rigidbody.

guinoalaskapp · Nov 26, 2021 at 04:07 PM 0

Share

Yea but i have a problem, i have 2 gameObjects, both have Colliders and Rigidbody, but they don´t trigger the OnCollision event, why is it?

onCollisionEnter doesn't work without RIgidbody?

1 Reply

Your answer

Follow this Question

Related Questions