我用 Javascript/ html/ css 编程了一个小小的浏览器游戏。 为了改进游戏的性能, 我想检查游戏在玩游戏的人的浏览器上是否运行缓慢, 并自动降低首选项 。
有人知道如何从当前用户(或硬件数据)中检查每秒的框架吗?
我用 Javascript/ html/ css 编程了一个小小的浏览器游戏。 为了改进游戏的性能, 我想检查游戏在玩游戏的人的浏览器上是否运行缓慢, 并自动降低首选项 。
有人知道如何从当前用户(或硬件数据)中检查每秒的框架吗?
如果您只是使用 javascript、 html 和 cs ( no jquery 或 dojo 或...), 那么您应该自己量度它 。 我想您会有一些同时环可以重新生成整个屏幕或部件 。 请检查这需要多少次, 您可以使用 Date () 来决定一个框架的时间 :
from=new Date();
//render one frame
to = new Date();
dt=to-from;
setFPS(1000/dt);
您可以使用
window. request 动画Frame
requestAnimationFrame = window.requestAnimationFrame || window.mozRequestAnimationFrame ||
window.webkitRequestAnimationFrame || window.msRequestAnimationFrame;
var start = window.mozAnimationStartTime; // Only supported in FF. Other browsers can use something like Date.now().
function step(timestamp) {
var progress = timestamp - start;
d.style.left = Math.min(progress/10, 200) + "px";
if (progress < 2000) {
requestAnimationFrame(step);
}
}
requestAnimationFrame(step);
more on: https://developer.mozilla.org/en/DOM/window.requestAnimationFrame
I am trying to create a search text-field like on the Apple website. The HTML looks like this: <div class="frm-search"> <div> <input class="btn" type="image" src="http://www....
I have a div <div id="masterdiv"> which has several child <div>s. Example: <div id="masterdiv"> <div id="childdiv1" /> <div id="childdiv2" /> <div id="...
I m writing a php script to crop an image. The script overwrites the old image with the new one, but when I reload the page (which is supposed to pickup the new image) I still see the old one. ...
<form><input type="file" name="first" onchange="jsFunction(2);"> <input type="file" name="second" onchange="jsFunction(3);"</form> Possible to pass just numbers to the js ...
So I ve got a menu with a hover/selected state and it loads fine in IE6/IE7. However when I scroll down the page and put the element outside of the viewport and then back in I get a broken image! I ...
I am building some basic HTML code for a CMS. One of the page-related options in the CMS is "background image" and "stretch page width / height to background image width / height." so that with large ...
Is it possible to reload a form after file-input change? I have a form where the user can chose an image for upload. I also have a php script which displays that image resized. I only wonder if it ...
I d like to add a simple separator line in an aspx web form. Does anyone know how? It sounds easy enough, but still I can t manage to find how to do it.. 10x!