2D colliders not detecting collision

Unity Engine
1

Hello everyone!

Im new to unity and coding in general and i’m running in to an issue i cant seem to figure out.

I’m trying to make a simple 2d platformer game to get going with learning so i’ve been following videos and looking online for help. My problem is that i’ve attached a 2D box collider and rigidbody to my player as well as a 2d box collider to the ground sprite and when i hit play the character falls straight through. But if i add a regular 3D collider and 3D rigidbody to everything, it all works fine. Ive checked the layers (maybe i dont have them set up right) and ive tried making the player’s collider a trigger as well.

Does anyone know why this would happen?
Also, is it bad practice to use 3d colliders with small Z values in a 2d game to get around a problem like this?

I added pictures of my setting if it helps.

Thank in advance for any help!!!

4772129--454439--player settings.png
4772129--454439--player settings.png1920×1080 202 KB
4772129--454442--box setttings.png
4772129--454442--box setttings.png1920×1080 162 KB

2

Welcome.

Going to need slightly more information, because what you show should work. Can you share your scene file?

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3

Your ground object has a 3D collider in your screenshot, it should have a 2D collider. The 3D and 2D physics systems do not interact.

2 Likes
4

Ok idk what happened but i mistakenly left the 3d collider on the ground while testing to see if 3d colliders would work. for some reason after i changed it back to a 2d collider it started working. i know that it should work i just don’t know how its working all of a sudden because i know for a fact had 2d colliders on everything the first time i tried it.

But anyway im glad its working now and Thank you guys for the help!!

1 Like