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It was the challenge for me. Seeing some difficult-to-solve problem, attacking it, and actually solving it after much perseverance.

Kind of stemming from the mindspace "If they can build X, I can build X!"

I'd explicitly not look up tutorials, just so I'd have the opportunity to solve the mathemathics myself. Like building a 3D physics engine. (I did look up colission detection after struggling with it for a month or so, inventing GJK is on another level)




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