VRDisplayCapabilities

我们的志愿者还没有将这篇文章翻译为 中文 (简体)。加入我们帮助完成翻译！
您也可以阅读此文章的English (US)版。

This is an experimental technology
Because this technology's specification has not stabilized, check the compatibility table for usage in various browsers. Also note that the syntax and behavior of an experimental technology is subject to change in future versions of browsers as the specification changes.

The VRDisplayCapabilities interface of the WebVR API describes the capabilities of a VRDisplay — its features can be used to perform VR device capability tests, for example can it return position information.

This interface is accessible through the VRDisplay.capabilities property.

Properties

VRDisplayCapabilities.canPresent Read only
Returns a Boolean stating whether the VR display is capable of presenting content (e.g. through an HMD).
VRDisplayCapabilities.hasExternalDisplay Read only
Returns a Boolean stating whether the VR display is separate from the device's primary display.
VRDisplayCapabilities.hasOrientation  Read only
Returns a Boolean stating whether the VR display can track and return orientation information.
VRDisplayCapabilities.hasPosition Read only
Returns a Boolean stating whether the VR display can track and return position information.
VRDisplayCapabilities.maxLayers Read only
Returns a number indicating the maximum number of VRLayers that the VR display can present at once (e.g. the maximum length of the array that VRDisplay.requestPresent() can accept.)

Examples

function reportDisplays() {
  navigator.getVRDisplays().then(function(displays) {
    for(var i = 0; i < displays.length; i++) {
      var cap = displays[i].capabilities;
      // cap is a VRDisplayCapabilities object
      var listItem = document.createElement('li');
      listItem.innerHTML = '<strong>Display ' + (i+1) + '</strong>'
                   + '<br>VR Display ID: ' + displays[i].displayId
                   + '<br>VR Display Name: ' + displays[i].displayName
                   + '<br>Display can present content: ' + cap.canPresent
                   + '<br>Display is separate from the computer\'s main display: ' + cap.hasExternalDisplay
                   + '<br>Display can return position info: ' + cap.hasPosition
                   + '<br>Display can return orientation info: ' + cap.hasOrientation
                   + '<br>Display max layers: ' + cap.maxLayers;
      list.appendChild(listItem);
    }
  });
}

Specifications

Specification Status Comment
WebVR 1.1
The definition of 'VRDisplayCapabilities' in that specification.		 Editor's Draft Initial definition

Browser compatibility

FeatureChromeEdgeFirefoxInternet ExplorerOperaSafari
canPresent (Yes)1 2 (Yes)553 No ? ?
hasExternalDisplay (Yes)1 2 (Yes)553 No ? ?
hasPosition (Yes)1 2 (Yes)553 No ? ?
hasOrientation (Yes)1 2 (Yes)553 No ? ?
maxLayers (Yes)1 2 (Yes)553 No ? ?
FeatureAndroidChrome for AndroidEdge mobileFirefox for AndroidIE mobileOpera AndroidiOS Safari
canPresent No (Yes)4 ? ? No ? ?
hasExternalDisplay No (Yes)4 ? ? No ? ?
hasPosition No (Yes)4 ? ? No ? ?
hasOrientation No (Yes)4 ? ? No ? ?
maxLayers No (Yes)4 ? ? No ? ?

1. Only works on desktop in an experimental version of Chrome (other builds won't return any devices when Navigator.getVRDisplays() is invoked).

2. , this feature is behind the WebVR preference. To change preferences in Chrome, visit chrome://flags.

3. Currently only Windows support is enabled by default. Mac support is available in Firefox Nightly.

4. Currently supported only by Google Daydream.

See also

文档标签和贡献者