function AlphaFilter(alpha) {
        if (alpha === void 0) { alpha = 1.0; }
        var _this = _super.call(this, _pixi_core__WEBPACK_IMPORTED_MODULE_0__.defaultVertex, fragment, { uAlpha: 1 }) || this;
        _this.alpha = alpha;
        return _this;
    }
@param alpha - Amount of alpha from 0 to 1, where 0 is transparent