A little utility to pack a texture atlas at runtime. Written in typescript, used for gdxjs.
$ npm install gdxjs-texture-packer
import { packRuntimeAtlas } from "./gdxjs-texture-packer";
...
const regionsToPack: TextureRegion[] = [];
regionsToPack.push(...originalAtlas.findRegions('name_of_regions_1'));
regionsToPack.push(...originalAtlas.findRegions('name_of_regions_2'));
const runtimeAtlas = packRuntimeAtlas(gl, regionsToPack);