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Question by MaliusArth · Jun 21, 2014 at 07:19 PM · 2d2d-physics2d platformer2d collision

My 2D objects won't collide at all. Help?

I have a 2D Project
added 2 Sprites via GameObject -> Create other -> Sprite
added Rigidbody 2D & Box Collider 2D to the moving one
alt text

added Box Collider 2D to the static one
alt text

did not change any parameters of the components
Test it: Box won't stay on platform
added Script Component with OnCollisionEnter(Collision2D coll) with Debug.Log("WTF?");
Test it: no collision, no "WTF?"

...WTF? It supposed to be a box falling onto a static platform

unbenannt2.jpg (77.5 kB)
unbenannt1.jpg (113.3 kB)
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avatar image Apinaheebo · Jun 21, 2014 at 07:25 PM 1
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Have you checked 2d physics layers? Edit -> Project Settings -> Physics 2d. And your objects have different Z value, I don't know if that affects anything in 2d.

avatar image Ssiroo · Jun 21, 2014 at 07:31 PM 0
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Not sure if this is right but I think the Z position should be the same for both objects.

avatar image Bunnybomb7670 · Jun 21, 2014 at 07:34 PM 0
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Z position should not matter, however I think the issue with this is that the colliders are too small. 0.04 is a very small collider. I suggest try making it bigger and see if it has the same behaviour. Small colliders I have had trouble with in the past.

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Answer by Voarix · Jun 21, 2014 at 07:47 PM

Due to the small size of the colliders the physics engine skips the position just over it, making the colliders bigger solves this issue.

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