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Question by tajny · Sep 09, 2013 at 01:51 PM · collidermesh

Mesh collider inside cube - inverted direction

Hi all, i'm new to unity and still learning.

In blender i have created a cube, removed one face from top , recalculated normals with "inside" option.

This model works ok but i have some collision problems, mesh collider is still working from outside the cube not inside while rendering and texturing are working without problem.

To be more precise , onCollisionEnter goes fired only when source target hit outside of this box not inside.

What am i missing ? How to flip mesh collider to work from inside?

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cube-opened.jpg (43.9 kB)
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Answer by Eric5h5 · Sep 09, 2013 at 01:59 PM

Uncheck "convex" on the mesh collider.

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avatar image tajny · Sep 09, 2013 at 02:01 PM 0
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it is unchecked;/

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Answer by Charles-Van-Norman · Jan 09, 2014 at 12:15 AM

Not sure if this will solve your problem, but I believe you need to have a three dimensional wall for the trigger to work from both sides. In other words, your wall needs to have a tiny amount of thickness to it.

Alternatively, try using a different cube than the actual mesh for trigger events, and just look for OnTriggerExit when things leave the cube. Then any object inside that walks outside will trigger the OnTriggerExit function.

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