2d rigidbody falling from the collider when it is moved

Question

I have a box made of four rectangles. A 2D box collider is attached to each of the square. The box rotates in both the directions upon receiving the commands. The square inside the box has a rigidbody attached to it. The square rests on the box when pressed play however when I am rotating the box, the square jumps down the box and keep going down. Please suggest a resolution for it. Below is a screenshot. alt text

After rotating the box

alt text

Answer 1

Answer by megastacks_13 · Feb 13, 2020 at 09:16 AM

@shakti_patra You will probably need to add a single collider to each of the rectangles that form the big square because if you put a single collider, it will fall. I think this is the solution, tell me if it works :)

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Answer 2

Answer by shakti_patra · Feb 13, 2020 at 09:26 AM

Thank you for the response however I am already using individual 2D box colliders for the sides and facing this issue. I also tried using single polygon collider however still facing the same issue. I tried decreasing the rotation speed of the box and issue was fixed but my game requires high rotation speed. Any help is highly appreciated..

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megastacks_13 · Feb 13, 2020 at 09:43 AM 0

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Do you have the collision detection in continous? It show in discrete by default I think that is in the rigidbody componernt

shakti_patra megastacks_13 · Feb 13, 2020 at 09:47 AM 0

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I have tried with both continuous and discrete but the results are same.. issue persists.. i think it has to be something with the rotation speed.

megastacks_13 · Feb 13, 2020 at 09:46 AM 0

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The discrete collision detection, is checking a collider every frame, so if you go to quick, it won't detect the collider and fall, the continous detection, detects the collider all the time. Waiting fon an answer

Answer 3

Answer by Merivo · May 25 at 11:03 PM

I know this is a necropost but I had this issue and found a solution. Give it both a box collider and a slightly smaller circle collider. Due to how circle colliders work they almost never fall through other colliders. Making it slightly smaller also means the box collider behaviour gets priority.

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2d rigidbody falling from the collider when it is moved

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