Asking Box2d if a collision happened

Posted by Rosarch on Stack Overflow See other posts from Stack Overflow or by Rosarch
Published on 2010-03-25T21:53:32Z Indexed on 2010/03/26 15:23 UTC
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Filed under:

c#

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box2d

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physics-engine

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XNA

I'm using Box2dx (ported to C#; optimized for XNA). It handles collision resolution, but how can I tell if two objects are currently colliding?

This is the function I'm trying to write:

public bool IsColliding(GameObjectController collider1, GameObjectController collider2)

Where collider1.Model.Body is the Box2d Body, and collider1.Model.BodyDef is the Box2d BodyDef. (The same goes for collider2, of course.)

UPDATE: Looks like contact listeners or this could be useful:

        AABB collisionBox;
        model.Body.GetFixtureList().GetAABB(out collisionBox);

Why does GetFixtureList() return one fixture?

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