Uploaded August 2026 | Updated September 2026, 3 hours ago

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If your loot table is a pile of ifs, you do not have a system — you have magic numbers that break when someone asks for Legendary to be a little rarer. This video builds a weighted loot table instead: each item gets a weight, you pick in proportion to those weights, and the picker code stays put. We walk through prefix sums plus binary search on a number line, then the alias method that turns the same weights into two random calls after setup. A small Unity helper maps an AnimationCurve onto that same weight table so designers can tune rarity without rewriting thresholds. Same odds, no hardcoded luck.

algomaster.io/learn/dsa/random-pick-with-weight

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▬ Contents of this video ▬▬▬▬▬▬▬▬▬▬

0:00 Prefix-Sum and Binary Search
4:27 Alias Method
9:08 Curve Weights
9:50 Demo

*Source code:* gist.github.com/adammyhre/82b04c106bdee0fc6af1cc93be3d76b3

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