是requestAnimationFrame实现的递归吗? [英] Is requestAnimationFrame implementation's recursive?

问题描述

我目前正在尝试Three.js，它依赖于 requestAnimationFrame 来执行动画.

I'm currently experimenting with three.js, which relies on requestAnimationFrame to perform animations.

在调用多维数据集旋转和 renderer.render 函数之前，以下代码不会导致无限递归吗?

Wouldn't the following code result in infinite recursion before the cube rotations and renderer.render function are invoked?

function render() {
    requestAnimationFrame(render);
    cube.rotation.x += 0.1;
    cube.rotation.y += 0.1;
    renderer.render(scene, camera); 
}
render();

该代码有效，但是我正在努力提高我对JavaScript的总体了解.

The code works, but I'm trying to improve my overall understanding of JavaScript.

我的看法是，渲染作为回调函数被调用.但这是否意味着JavaScript会继续运行之前函数中的代码，然后停止继续进行下一个调用?

The way I see it, is that render is invoked as a callback function. But does that mean that JavaScript continues running through the code in the function before stopping to move on to the next call?

推荐答案

这仅请求浏览器在下一个渲染循环之前调用您的回调:

This only requests the browser to call your callback before the next rendering loop:

准备在屏幕上更新动画时，应调用此方法.这将要求您的动画函数在浏览器执行下一次重新绘制之前被调用.

You should call this method whenever you're ready to update your animation onscreen. This will request that your animation function be called before the browser performs the next repaint.

因此这里没有递归，您的函数将继续执行.

So there is no recursion here, and your function continue with the execution.

您还可以使用 cancelAnimationFrame 取消对回调的请求.

You can also cancel the request for your callback with cancelAnimationFrame.

在此处中查找.

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