VRDisplay.requestAnimationFrame()

这是一个实验中的功能
此功能某些浏览器尚在开发中，请参考浏览器兼容性表格以得到在不同浏览器中适合使用的前缀。由于该功能对应的标准文档可能被重新修订，所以在未来版本的浏览器中该功能的语法和行为可能随之改变。

The requestAnimationFrame() method of the VRDisplay interface is a special implementation of Window.requestAnimationFrame containing a callback function that will be called every time a new frame of the VRDisplay presentation is rendered:

  • When the VRDisplay is not presenting a scene, this is functionally equivalent to Window.requestAnimationFrame.
  • When the VRDisplay is presenting, the callback is called at the native refresh rate of the VRDisplay.

Syntax

var handle = vrDisplayInstance.requestAnimationFrame(callback);

Parameters

callback
A callback function that will be called every time a new frame of the VRDisplay presentation is rendered.

Return value

A long representing the handle of the requestAnimationFrame() call. This can then be passed to a VRDisplay.cancelAnimationFrame() call to unregister the callback.

Examples

TBD.

Specifications

Specification Status Comment
WebVR
requestAnimationFrame()		 Editor's Draft Initial definition

Browser compatibility

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari (WebKit)
Basic support (Yes) (Yes) 未实现 未实现 未实现
Feature Android Firefox Mobile (Gecko) IE Phone Opera Mobile Safari Mobile Chrome for Android
Basic support 未实现 (Yes) 未实现 未实现 未实现 未实现

See also

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