A 2D vector class with vector calculation methods.
'@emptyother:registry=https://npm.pkg.github.com' >> .npmrc
npm install @emptyother/vector2d
import Vector2d from '@emptyother/vector2d';
const vec1 = new Vector2d(1,1);
const vec2 = new Vector2d(2,3);
vec1.add(vec2);
vec1.toString(); // (3, 4)
vec1.toArray(); // [3, 4]
vec1.toObject(); // { x: 3, y: 4 }