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Question by longarm123 · Aug 02, 2015 at 08:08 AM · unity 5collidercircle

Can you make a ball not hit other balls? (circle colliders)

Right now I have a simple pong game and am trying to make a power up that duplicate balls which works perfectly fine up to the point where the balls hit each other and all the physics go haywire. I want the balls to act like a breakout game where the balls can't hit each other but can still hit the paddles just fine. Is there a way to do that?

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Answer by PatriceVignola · Aug 02, 2015 at 10:33 AM

What you want to do is use layers and the Physics2d (or simply Physics) matrix.

First, add a layer called "Ball" to your ball prefab:

alt text

Then, go to the Edit -> Project Settings -> Physics 2D panel and uncheck the checkmark for the Ball/Ball case:

alt text

And you are set! What this matrix does is basically telling unity if you want collisions to happen between 2 layers or not.


layer2.png (12.5 kB)
newlayer.png (51.7 kB)
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avatar image longarm123 · Aug 02, 2015 at 09:15 PM 0
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Thanks it worked, didn't know you can make layers like that .

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