AABB - AABB Collision, which face do I hit?

Posted by PeeS on Game Development See other posts from Game Development or by PeeS
Published on 2012-03-22T08:55:06Z Indexed on 2012/03/22 11:39 UTC
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Filed under:

c++

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collision-detection

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math

To allow my objects to slide when they collide, I need to :

Know which face of the AABB they collide with.
Calculate the normal to that face.
Return the normal and calculate the impulse that to apply to the player's velocity.

Question

How can I calculate which face of the AABB I collided with, knowing that I have two AABB's colliding? One is the player and the other is a world object.

Here's what that looks like (problem collision circled in white):

problem collision

Thank you for your help.

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