Calculating modulo with other arithmetic functions (thanks to https://stackoverflow.com/questions/35155598/unable-to-use-in-glsl for the idea)

mod-a-b.js

// neither recursion nor looping is necessary to compute a mod b. That's easily done by a - (b * floor(a/b)).
const mod = (a, b) => a - (b * floor(a/b))

// Simple, but powerful when running on platforms that lack the function but have the floor function (i.e. GLSL for deck.gl)

// Thanks to https://stackoverflow.com/questions/35155598/unable-to-use-in-glsl for the idea