FABRIK Algorithm (2D)

The FABRIK algorithm is an amazingly clever solution to the Inverse Kinematics problem – how to adjust the joints of an arm to reach a target location.

In this tutorial, I go over how the core algorithm works in 2D, building up from simple concepts.

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Two-Dimensional Bin Packing

Given a collection of different sized images, how can you efficiently pack them into one big image?

Brute-forcing the problem is too expensive - so here we come up with a simple heuristic that works pretty well.

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