Вопрос - ответ

   default:
       var qual = m_cfg.P_LOW;
       break;
    }

   default:
       var qual = m_cfg.P_ULTRA;
       break;
    }

"use strict"

// register the application module
b4w.register("app_my", function(exports, require) {

// import modules used by the app

    var m_anim   = require("animation");
    var m_data   = require("data");
    var m_app    = require("app");
    var m_cfg    = require("config");
    var m_mat    = require("material");
    var m_obj    = require("objects");
    var m_scenes = require("scenes");
    var m_rgb    = require("rgb");
    var m_trans  = require("transform");
    var m_vec    = require("vec3");
    var m_main   = require("main");
    var m_camera = require("camera");
    var m_ctl    = require("controls");
    var m_time   = require("time");
    var m_util   = require("util");
    var m_container = require("container");
	var m_storage  = require("storage");
	var m_preloader = require("preloader");


/**
 * export the method to initialize the app (called at the bottom of this file)
 */
 
	


exports.init = function() {
set_quality_config();
    m_app.init({
        canvas_container_id: "Gas_id",
		callback: init_cb,
        show_fps: true,
        console_verbose: true,
        autoresize: true,
		physics_enabled: false
		
    });
}



/**
 * callback executed when the app is initialized 
 */
function init_cb(canvas_elem, success) {


    if (!success) {
        console.log("b4w init failure");
        return;
    }


	
	m_cfg.set("background_color", new Float32Array([0.01, 0.02, 0.17, 1.0]));
	
		m_preloader.create_simple_preloader({
           bg_color:"#00000000",
           bar_color:"#FFF",
           background_container_id: "preloader",
           canvas_container_id: "Gas_id",
           preloader_fadeout: true});


	load();
}

//загрузка файла
function load() {
  var p_cb = preloader_cb;
  m_data.load("app_my.json", load_cb,p_cb,true);
}
 
//обновление “полоски”
function preloader_cb(percentage) {
  m_preloader.update_preloader(percentage);
}

/**


/**
 * callback executed when the scene is loaded
 */
function load_cb(data_id, success) {
    if (!success) {
        console.log("b4w load failure");
        return;
    }
    //init_interface();	
    m_app.enable_camera_controls();

    // place your code here

}

function set_quality_config() {
    var quality = m_storage.get("quality");

    if (!quality)
        return;

    switch (quality) {
    case "ULTRA":
        var qual = m_cfg.P_ULTRA;
        break;
    case "HIGH":
        var qual = m_cfg.P_HIGH;
        break;
    case "LOW":
        var qual = m_cfg.P_LOW;
        break;
    case "CUSTOM":
        var qual = m_cfg.P_CUSTOM;
        break;
   default:
       var qual = m_cfg.P_ULTRA;
       break;
    }

    m_cfg.set("quality", qual);
}

// function init_interface() {
   // var set_low_q_btn = document.getElementById("low_q_button");
   // var set_ultra_q_btn = document.getElementById("ultra_q_button");

    // set_low_q_btn.onclick = function() {
        // m_storage.set("quality", "LOW");
        // window.location.reload(); // reload page
    // }
    // set_ultra_q_btn.onclick = function() {
        // m_storage.set("quality", "ULTRA");
        // window.location.reload(); // reload page
    // }
// }
  
});



// import the app module and start the app by calling the init method
b4w.require("app_my").init();

function set_quality_config() {
    var quality = m_storage.get("quality");

    if (!quality)
        return;

    switch (quality) {
    case "ULTRA":
        var qual = m_cfg.P_ULTRA;
        break;
    case "HIGH":
        var qual = m_cfg.P_HIGH;
        break;
    case "LOW":
        var qual = m_cfg.P_LOW;
        break;
    case "CUSTOM":
        var qual = m_cfg.P_CUSTOM;
        break;
   default:
       var qual = m_cfg.P_ULTRA;
       break;
    }
    console.log("!!!!!!!!!!!", qual)
    m_cfg.set("quality", qual);
}

exports.P_LOW    = 1;  // maximize performance
exports.P_HIGH   = 2;  // use all requested features
exports.P_ULTRA  = 3;  // use all requested features and maximize quality
exports.P_CUSTOM = 4;  // use exports.defaults

b4w.min.js:425 B4W LOG: INIT ENGINE 16.03 RELEASE (31.03.2016 11:34:06)
b4w.min.js:425 B4W LOG: INIT WEBGL 1
b4w.min.js:425 B4W LOG: GET EXTENSION WEBGL_debug_renderer_info
b4w.min.js:425 B4W LOG: RENDERER INFO: Google Inc., ANGLE (NVIDIA GeForce GTX 660 Ti Direct3D11 vs_5_0 ps_5_0)
b4w.min.js:425 B4W LOG: INIT WEBAUDIO: 48000Hz
b4w.min.js:425 B4W LOG: GET EXTENSION WEBGL_depth_texture
b4w.min.js:425 B4W LOG: GET EXTENSION WEBGL_compressed_texture_s3tc
b4w.min.js:425 B4W LOG: Chrome detected. Some of deprecated functions related to the Doppler effect won't be called.
b4w.min.js:425 B4W LOG: SET PRECISION: highp
b4w.min.js:425 B4W LOG: LOAD METADATA app_my.json?t=31032016113406
b4w.min.js:425 B4W LOG: LOAD BINARY app_my.bin?t=31032016113406
b4w.min.js:425 B4W LOG: GET EXTENSION OES_element_index_uint
b4w.min.js:425 B4W LOG: PHYSICS READY
b4w.min.js:425 B4W LOG: LOAD IMAGE 128x128 map/metal.jpg?t=31032016113406
b4w.min.js:425 B4W LOG: LOAD IMAGE 1024x1024 map/wal1024.jpg?t=31032016113406
b4w.min.js:425 B4W LOG: LOAD IMAGE 81x64 map/screen.jpg?t=31032016113406
b4w.min.js:425 B4W LOG: LOAD IMAGE 512x512 map/cem.jpg?t=31032016113406
b4w.min.js:425 B4W LOG: LOAD IMAGE 716x128 map/roof_shd.png?t=31032016113406
b4w.min.js:425 B4W LOG: LOAD IMAGE 768x512 map/forest_cubemap3.png?t=31032016113406
b4w.min.js:425 B4W LOG: LOADED ALL IMAGES
b4w.min.js:425 B4W LOG: START NLA
b4w.min.js:425 B4W LOG: THREAD 0: LOADED CALLBACK

function set_quality_config() {
    var quality = m_storage.get("quality");
    switch (quality) {
    case "ULTRA":
        var qual = m_cfg.P_ULTRA;
        break;
    case "HIGH":
        var qual = m_cfg.P_HIGH;
        break;
    case "LOW":
        var qual = m_cfg.P_LOW;
        break;
    case "CUSTOM":
        var qual = m_cfg.P_CUSTOM;
        break;
   default:
       var qual = m_cfg.P_ULTRA;
       break;
    }
    m_cfg.set("quality", qual);
}

 if (!quality)
        return;