VRFieldOfView

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.

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 VRFieldOfView interface of the WebVR API represents a field of view defined by 4 different degree values describing the view from a center point.

Properties

VRFieldOfView.upDegrees Read only: The number of degrees upwards that the field of view extends in.
VRFieldOfView.rightDegrees Read only: The number of degrees to the right that the field of view extends in.
VRFieldOfView.downDegrees Read only: The number of degrees downwards that the field of view extends in.
VRFieldOfView.leftDegrees Read only: The number of degrees to the left that the field of view extends in.

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 'VRFieldOfView' in that specification.	Editor's Draft	Initial definition

Feature	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari
`downDegrees`	(Yes)¹ ²	(Yes)	55³	No	?	?
`leftDegrees`	(Yes)¹ ²	(Yes)	55³	No	?	?
`rightDegrees`	(Yes)¹ ²	(Yes)	55³	No	?	?
`upDegrees`	(Yes)¹ ²	(Yes)	55³	No	?	?
`VRFieldOfView`	No	No	No	No	?	?

Feature	Android	Chrome for Android	Edge mobile	Firefox for Android	IE mobile	Opera Android	iOS Safari
`downDegrees`	No	(Yes)⁴	?	?	No	?	?
`leftDegrees`	No	(Yes)⁴	?	?	No	?	?
`rightDegrees`	No	(Yes)⁴	?	?	No	?	?
`upDegrees`	No	(Yes)⁴	?	?	No	?	?
`VRFieldOfView`	No	No	No	?	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.

Properties

Examples

Specifications

Browser compatibility

See also

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