not mine but taking the opportunity to repost an amazing one: the quake inverse square root https://betterexplained.com/articles/understanding-quakes-fast-inv

not mine but taking the opportunity to repost an amazing one: the quake inverse square root https://betterexplained.com/articles/understanding-quakes-fast-inverse-square-root/ https://betterexplained.com/articles/understanding-quakes-fa...