VRDisplay.requestAnimationFrame()

实验性: 这是一项实验性技术
在将其用于生产之前，请仔细检查浏览器兼容性表格。

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

js

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() (en-US) call to unregister the callback.

Examples

TBD.

Specifications

该 API 在旧的 WebVR API（已被 WebXR Device API 取代）中定义。它不再有望成为标准。

在所有浏览器都实现新的 WebXR API (en-US) 之前，建议使用框架（如：A-Frame、Babylon.js 或 Three.js）或 polyfill 来开发适用于所有浏览器的 WebXR 应用程序。[1]

Browser compatibility

BCD tables only load in the browser

See also