README.md

In answer to http://stackoverflow.com/questions/44034049/why-doesnt-rollup-js-treeshake-my-library/44036934?noredirect=1#comment75114138_44036934 — paste this code into https://rollupjs.org/repl

goodcore.js

function _Calc() {
}
_Calc.prototype._ = function () {
    return new _Calc();
};
_Calc.prototype.Sign = function (x) {
    return typeof x === "number" ? x ? x < 0 ? -1 : 1 : x === x ? 0 : NaN : NaN;
};
_Calc.prototype.RotationDeg = function (rotation) {
    var rot = (rotation * _Calc.ROTATION_DEGREE_PRECISION) | 0;
    while (rot < 0) {
        rot += _Calc.DEG360;
    }
    while (rot >= _Calc.DEG360) {
        rot -= _Calc.DEG360;
    }
    return _Calc.ROTATION_LOOKUP[rot];
};
_Calc.prototype.RotationRad = function (rotation) {
    var rot = rotation * _Calc.DEGREE_FACTOR * _Calc.ROTATION_DEGREE_PRECISION | 0;
    return this.RotationDeg(rot / _Calc.ROTATION_DEGREE_PRECISION);
};
_Calc.prototype.ClosestRadianRotation = function (rotation) {
    var rot = rotation * _Calc.DEGREE_FACTOR * _Calc.ROTATION_DEGREE_PRECISION | 0;
    while (rot < 0) {
        rot += _Calc.DEG360;
    }
    while (rot >= _Calc.DEG360) {
        rot -= _Calc.DEG360;
    }
    return rot * _Calc.RADIAN_FACTOR / _Calc.ROTATION_DEGREE_PRECISION;
};
_Calc.ROTATION_DEGREE_PRECISION = 1;
_Calc.RADIAN_FACTOR = (1 / 360) * (2 * Math.PI);
_Calc.DEGREE_FACTOR = (1 / (2 * Math.PI) * 360);
_Calc.DEG360 = 360 * _Calc.ROTATION_DEGREE_PRECISION;
//_Calc.ROTATION_LOOKUP = (function () {
//    var lookup = [];
//    for (var i = 0; i < 360 * _Calc.ROTATION_DEGREE_PRECISION; i++) {
//        lookup.push([Math.cos(i * _Calc.RADIAN_FACTOR), Math.sin(i * _Calc.RADIAN_FACTOR)]);
//    }
//    return lookup;
//})();
//var Calc = new _Calc();

export { _Calc as Calc };
//# sourceMappingURL=goodcore.es.js.map

main.js

import { Calc } from './goodcore.js';

// console.log( new Calc() );