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Question by dearhpc · Jul 05, 2011 at 06:10 AM · physics

How to disable physics?

I don't need any physics, so how to disable it?

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avatar image Dreamblur · Jul 05, 2011 at 06:13 AM 1
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Just don't use any colliders and rigidbodies.

avatar image dearhpc · Jul 05, 2011 at 06:22 AM 0
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i didn't use any colliders and rigidbodies, but Physics.Simulate still cost time when viewed in Profile

avatar image jonas-echterhoff ♦♦ · Jul 05, 2011 at 06:54 AM 1
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If you don't use any colliders, rigidbodies or cloths, the time spent in Physics.Simulate should be insignificant.

avatar image Dreamblur · Jul 05, 2011 at 07:07 AM 0
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So you want to completely disable the actual physics engine? Well, the physics engine is built-in and fully integrated into the game engine. Unless you have access to the source code, there's generally no way to do what you want to do. It might be possible to do it with some kind of intrusive plug-in, but I haven't heard of any forays into that area, since it's really kinda pointless. People usually want physics of some kind, and those who don't need it simply ignore it. Those who want to use a different physics engine and those who don't need physics in their game at all and require all resources used for physics to be freed usually just opt to use a different game engine.

avatar image dearhpc · Jul 05, 2011 at 01:33 PM 0
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Thank you for your reply! In my 2D game, I don't need physics, yes, unity is not the right engine to do that!

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Answer by Eric5h5 · Jul 05, 2011 at 07:24 AM

In the time settings, set the fixed timestep to 10 (the maximum). That's as disabled as it gets.

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Answer by mnml_ · Mar 20, 2019 at 11:52 AM

I'd try to set

 Physics.autoSimulation = false;
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