Vector.js

module.exports = class {
    /**
     *
     * @param {Number} x
     * @param {Number} y
     */
    constructor(x, y) {
        /**
         * @type Number
         */
        this.x = x || 0;
        /**
         * @type Number
         */
        this.y = y || 0;
    }
    getDirection() {
        return Math.atan2(this.y, this.x);
    }
    setDirection(angle) {
        var magnitude = this.mag();
        this.x = Math.cos((angle * Math.PI) / 180) * magnitude;
        this.y = Math.sin((angle * Math.PI) / 180) * magnitude;
    }
    mag() {
        return Math.sqrt(this.x * this.x + this.y * this.y);
    }
    setMag(magnitude) {
        var direction = this.getDirection();
        this.x = Math.cos(direction) * magnitude;
        this.y = Math.sin(direction) * magnitude;
    }
    add(v2) {
        this.x += v2.x;
        this.y += v2.y;
    }
    sub(v2) {
        this.x -= v2.x;
        this.y -= v2.y;
    }
    mult(scalar) {
        this.x *= scalar;
        this.y *= scalar;
    }
    div(scalar) {
        this.x /= scalar;
        this.y /= scalar;
    }
    limit(max) {
        if (this.mag > max) {
            this.setMag(max);
            return;
        } else {
            return;
        }
    }
    normalize() {
        var m = this.mag();
        if (m > 0) {
            this.div(m);
        }
    }
    copy() {
        return new Vector(this.x, this.y);
    }
    toString() {
        return 'x: ' + this.x + ', y: ' + this.y;
    }
    toArray() {
        return [this.x, this.y];
    }
    toObject() {
        return { x: this.x, y: this.y };
    }
    getDistance(v2) {
        return Math.sqrt(Math.pow(this.x - v2.x, 2) + Math.pow(this.y - v2.y, 2));
    }
};
PVector = {
    add: function (v1, v2) {
        var v3 = new Vector(v1.x + v2.x, v1.y + v2.y);
        return v3;
    },
    sub: function (v1, v2) {
        var v3 = new Vector(v1.x - v2.x, v1.y - v2.y);
        return v3;
    },
    mult: function (v2, v2) {
        var v3 = new Vector(v1.x * v2.x, v1.y * v2.y);
        return v3;
    },
    div: function (v1, v2) {
        var v3 = new Vector(v1.x / v2.x, v1.y / v2.y);
        return v3;
    },
};