Кнопки изменения материала в HTML

<script type="module" src="simple_app.js"></script>

"use strict"

// register the application module
b4w.register("project1_main", function(exports, require) {

// import modules used by the app
var m_app       = require("app");
var m_cfg       = require("config");
var m_data      = require("data");
var m_preloader = require("preloader");
var m_ver       = require("version");

// detect application mode
var DEBUG = (m_ver.type() == "DEBUG");

// automatically detect assets path
var APP_ASSETS_PATH = m_cfg.get_assets_path("project1");

/**
 * export the method to initialize the app (called at the bottom of this file)
 */
exports.init = function() {
    m_app.init({
        canvas_container_id: "main_canvas_container",
        callback: init_cb,
        show_fps: DEBUG,
        console_verbose: DEBUG,
        autoresize: true
    });
}

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

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

    m_preloader.create_preloader();

    // ignore right-click on the canvas element
    canvas_elem.oncontextmenu = function(e) {
        e.preventDefault();
        e.stopPropagation();
        return false;
    };

    load();
}

/**
 * load the scene data
 */
function load() {
    m_data.load(APP_ASSETS_PATH + "ring_5.json", load_cb, preloader_cb);
}

/**
 * update the app's preloader
 */
function preloader_cb(percentage) {
    m_preloader.update_preloader(percentage);
}

exports.inherit_mat = function(obj_name, mat_name) {
    var m_mat = require("material");
    var m_scenes = require("scenes");

    var ring = m_scenes.get_object_by_name("01");
    var Sphere_001 = m_scenes.get_object_by_name(obj_name);
    m_mat.inherit_material(ring, "gold_nod", Sphere_001, mat_name);
}

/**
 * callback executed when the scene data is loaded
 */
function load_cb(data_id, success) {

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

    m_app.enable_camera_controls();

    // place your code here

}


});

function inherit_mat1() {
    b4w.require("project1_main").inherit_mat("Sphere.001", "chrome");
}

function inherit_mat2() {
    b4w.require("project1_main").inherit_mat("Sphere", "chrome.003");
}

// import the app module and start the app by calling the init method
b4w.require("project1_main").init();

function inherit_mat1() {
    b4w.require("project1_main").inherit_mat("Sphere.001", "chrome");
}

function inherit_mat2() {
    b4w.require("project1_main").inherit_mat("Sphere", "chrome.003");
}