babylonjs-重写loading动画

参考链接：https://doc.babylonjs.com/how...

function customLoadingScreen() {     console.log("customLoadingScreen creation") } customLoadingScreen.prototype.displayLoadingUI = function () {     console.log("customLoadingScreen loading")      loadingScreenDiv.innerHTML = "loading"; }; customLoadingScreen.prototype.hideLoadingUI = function () {     console.log("customLoadingScreen loaded")     loadingScreenDiv.style.display = "none";}; var loadingScreen = new customLoadingScreen(); engine.loadingScreen = loadingScreen; engine.displayLoadingUI();