How should I choose quadtree depth?

Posted by Evpok on Game Development See other posts from Game Development or by Evpok
Published on 2014-06-10T22:24:15Z Indexed on 2014/06/11 15:44 UTC
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collision-detection

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optimization

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quadtree

I'm using a quadtree to prune collision detection pairs in a 2d world. How should I choose to what depth said quadtree is calculated?

The world is made mostly of moving objects¹, so the cost of dispatching the objects between the quadtree cells matters. What is the relationship between the gain from less collision checking and the loss from more dispatching? How can I strike a balance that performs optimally?

¹ To be completely explicit, they are autonomous self-replicating cells competing for food sources. This is an attempt to show my pupils predator-prey dynamics and genetic evolution at work.

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