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Question by kasztan165 · Jul 27, 2015 at 11:04 AM · physicsmesh collider

Problem with Mesh Collider - Cup

Hey guys! So I made a glass, i have nice structure to mesh collider and it's going like that: alt text

I add rigidbody, mesh collider and add a basic structure of my cup. What I want is to drop ball into this cup. But it's stuck onto the top of them. Like that: alt text

So my mesh is looking good, why Unity don't make a full collider? Why is closed from top? Any idea?

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avatar image Baste · Jul 27, 2015 at 11:26 AM 2
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Is your mesh collider set to be convex? Convex colliders behaves like what you're describing.

avatar image kasztan165 · Jul 27, 2015 at 11:37 AM 0
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Yes it is. I must have a convex colidier when I want have active rigidbody.

avatar image Baste · Jul 27, 2015 at 11:51 AM 1
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Is the cup going to move? If not, it won't need a rigidbody.

Otherwise, build it from a bunch of invisible cube colliders. The physics engine has a restriction where moving rigidbodies has to have convex colliders, and convex colliders are by nature not hollow like your cup is.

Read up on compound colliders to see how to do this. Go to this page, and scroll down to "compound colliders"

avatar image kasztan165 · Jul 27, 2015 at 12:22 PM 0
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Yeah,i want the cup to "mobile".

Thanks for link, i see what i have to do.

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Answer by kasztan165 · Jul 27, 2015 at 12:22 PM

Thanks for your help this is lightend few things for me. And screen to show how I implementing this: alt text


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