This is an experimental technology
Check the Browser compatibility table carefully before using this in production.
Deprecated
This feature has been removed from the Web standards. Though some browsers may still support it, it is in the process of being dropped. Avoid using it and update existing code if possible; see the compatibility table at the bottom of this page to guide your decision. Be aware that this feature may cease to work at any time.
The upDegrees read-only property of the VRFieldOfView interface returns the number of degrees upwards that the field of view extends in.
Syntax
var myUpDegrees = VRFieldOfView.upDegrees;
Value
A double.
Examples
var info = document.querySelector('p');
var list = document.querySelector('ul');
var vrDisplay;
if(navigator.getVRDisplays) {
reportFieldOfView();
} else {
info.textContent = 'WebVR API not supported by this browser.'
}
function reportFieldOfView() {
navigator.getVRDisplays().then(function(displays) {
vrDisplay = displays[0];
var lEye = vrDisplay.getEyeParameters('left');
var rEye = vrDisplay.getEyeParameters('right');
// lEye and rEye are VREyeParameters objects
var lFOV = lEye.fieldOfView;
var rFOV = rEye.fieldOfView;
// lFOV and rFOV are VRFieldOfView objects
var listitem1 = document.createElement('li');
var listitem2 = document.createElement('li');
listitem1.innerHTML = '<strong>Left eye parameters</strong>'
+ '<br>Offset: ' + lEye.offset
+ '<br>Render width: ' + lEye.renderWidth
+ '<br>Render height: ' + lEye.renderHeight
+ '<br>Up degrees: ' + lFOV.upDegrees
+ '<br>Right degrees: ' + lFOV.rightDegrees
+ '<br>Down degrees: ' + lFOV.downDegrees
+ '<br>Left degrees: ' + lFOV.leftDegrees
listitem2.innerHTML = '<strong>Right eye parameters</strong>'
+ '<br>Offset: ' + rEye.offset
+ '<br>Render width: ' + rEye.renderWidth
+ '<br>Render height: ' + rEye.renderHeight
+ '<br>Up degrees: ' + rFOV.upDegrees
+ '<br>Right degrees: ' + rFOV.rightDegrees
+ '<br>Down degrees: ' + rFOV.downDegrees
+ '<br>Left degrees: ' + rFOV.leftDegrees
list.appendChild(listitem1);
list.appendChild(listitem2);
});
}
Specifications
| Specification | Status | Comment |
|---|---|---|
| WebVR 1.1 The definition of 'upDegrees' in that specification. |
Draft | Initial definition |
Browser compatibility
| Feature | Chrome | Edge | Firefox | Internet Explorer | Opera | Safari |
|---|---|---|---|---|---|---|
| Basic support | No | 15 | 555 606 | No | ? | ? |
| Feature | Android webview | Chrome for Android | Edge mobile | Firefox for Android | Opera Android | iOS Safari | Samsung Internet |
|---|---|---|---|---|---|---|---|
| Basic support | No | 561 2 3 4 | ? | ? | ? | ? | 6.0 |
1. Only works in an experimental version of Chrome. (Other builds won't return any devices when Navigator.getVRDisplays() is invoked.)
2. Daydream View supported in Chrome 56.
3. Google Cardboard supported in Chrome 57.
4. From version 56: this feature is behind the WebVR preference. To change preferences in Chrome, visit chrome://flags.
5. Windows support was enabled in Firefox 55.
6. macOS support was enabled in Firefox 60.
See also
- WebVR API homepage
- MozVr.com — demos, downloads, and other resources from the Mozilla VR team.