Method constructor

docs/app/js/sanddance-app.js:69062–69073

(x = 0, y = 0)

var _glMatrixExtras = require("../lib/gl-matrix-extras");
class Vector2 extends (0, _vectorDefault.default) {
    constructor(x = 0, y = 0){
        super(2);
        if ((0, _common.isArray)(x) && arguments.length === 1) this.copy(x);
        else {
            if ((0, _common.config).debug) {
                (0, _validators.checkNumber)(x);
                (0, _validators.checkNumber)(y);
            }
            this[0] = x;
            this[1] = y;
        }
    }
    set(x, y) {
        this[0] = x;
        this[1] = y;