(function (root, factory){
    if (typeof define === 'function' && define.amd){ // AMD
        define(factory);
    } else if (typeof module !== 'undefined' && module.exports) { // Node.js
        module.exports = factory();
    } else { // Browser
        root.VectorTile = factory();
    }
})(this, function () {

    function VectorTile(pbf, end) {
        this.layers = pbf.readFields(readTile, {}, end);
    }

    function readTile(tag, layers, pbf) {
        if (tag === 3) {
            var layer = new VectorTileLayer(pbf, pbf.readVarint() + pbf.pos);
            if (layer.length) layers[layer.name] = layer;
        }
    }

    return VectorTile;
});