Collider 2d change size in y axis doesnt work

Unity Engine
,
1

When i create a particle system and then add a collider 2d (doesnt matter which collider it is) i cant change the size in the y axis, it stays the same.

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2

You have rotated your GameObject’s Transform so now your BoxCollider2D is lying flat going into the distance.

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Instead, make two child GameObjects, one for the ParticleSystem that is rotated -90 and one for the BoxCollider2D that is not.

EDIT: I see Unity is giving you a spiffy warning about it:

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3

Everything Kurt said above with the added info that rotating a 2D collider (in the XY plane) 90-deg around the X-axis means the collider would be in the XZ plane. For this to exist it would need to be a 3D collider.

Any transformation you make to 2D collider geometry is projected onto the XY plane so for your case above, that means you’re seeing the projection edge-on so with no thickness it has zero area and cannot exist.

Also, that warning couldn’t be any bigger but to this day it’s ignored again and again. Maybe I need to make it flash? :slight_smile: