How to detech collision without rigidbody

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Hello. I have a game object. I write a script. I wanna make collision detechtion without rigidbody. I try but isn't work.

Answer 1

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Answer by vexe · Sep 14, 2013 at 09:53 AM

You want to walk in a collider area without using a rigidbody component attached to your game object?

Just use OnTriggerEnter and check isTrigger on your collider.

EDIT: Read this, and then this. To have collision between two of your objects one of them has to have a rigidbody component.

If you don't want your object to react with physics due to the fact that it has a rigidbody attached to it, just check isKinematic in the rigidbody component.

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mirkobon · Sep 14, 2013 at 09:56 AM 0

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If answer helped please accept the anwer

sarahnorthway · Dec 27, 2020 at 02:46 AM 0

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From chart at bottom of Unity Docs, for OnTriggerEnter at least one collider needs a RigidBody, but it can be isKinematic if Collider.isTrigger=true. For OnCollisionEnter at least one collider needs a (regular, NOT kinematic) rigidbody. Confusing AF!

Answer 2

Answer by MichLad · Oct 17, 2019 at 01:43 PM

I had problems with the collision. I manually set the position, but the rigidbody caused them to constantly move due to its physics. Vexe's solution didn't work since I didn't have said isKinematic checkbox. But it did lead me to the solution.

My solution:

In a script I set:

myRigidbody.isKinematic = true;

myRigidbody.useFullKinematicContacts = true;

I didn't have the isKinematic checkbox available in the editor. But I believe that setting Body Type from 'dynamic' to 'kinematic', and checking the 'use Full Kinematic Contacts' checkbox will have the same outcome.

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Toscan0 · Apr 26, 2020 at 03:14 PM 0

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This is the right answer, the above one is incompleted. You need to set the rigidbody to Kinematic and set the "Use Full Kinematic Constacts" checbox to true. Here is a pic to help: alt text

screenshot-1.png (13.8 kB)

How to detech collision without rigidbody

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