This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

The VREyeParameters interface of the WebVR API represents all the information required to correctly render a scene for a given eye, including field of view information.

This interface is accessible through the VRDisplay.getEyeParameters() method.

The values in this interface should not be used to compute view or projection matrices. In order to ensure the widest possible hardware compatibility use the matrices provided by VRFrameData.

Properties

VREyeParameters.offset  Read only
Represents the offset from the center point between the user's eyes to the center of the eye, measured in meters.
VREyeParameters.fieldOfView  Read only
Describes the current field of view for the eye, which can vary as the user adjusts their interpupillary distance (IPD).
VREyeParameters.renderWidth Read only
Describes the recommended render target width of each eye viewport, in pixels.
VREyeParameters.renderHeight Read only
Describes the recommended render target height of each eye viewport, in pixels.

Examples

navigator.getVRDisplays().then(function(displays) {
  // If a display is available, use it to present the scene
  vrDisplay = displays[0];
  console.log('Display found');
  // Starting the presentation when the button is clicked: 
  //   It can only be called in response to a user gesture
  btn.addEventListener('click', function() {
    vrDisplay.requestPresent([{ source: canvas }]).then(function() {
      console.log('Presenting to WebVR display');

      // Set the canvas size to the size of the vrDisplay viewport

      var leftEye = vrDisplay.getEyeParameters('left');
      var rightEye = vrDisplay.getEyeParameters('right');

      canvas.width = Math.max(leftEye.renderWidth, rightEye.renderWidth) * 2;
      canvas.height = Math.max(leftEye.renderHeight, rightEye.renderHeight);

      drawVRScene();
    });
  });
});

Specifications

Specification Status Comment
WebVR 1.1
The definition of 'VREyeParameters' in that specification.
Draft Initial definition

Browser compatibility

FeatureChromeEdgeFirefoxInternet ExplorerOperaSafari
Basic support No Yes

555

606

No ? ?
fieldOfView No15

555

606

No ? ?
maximumFieldOfView No No

555

606

No ? ?
minimumFieldOfView No No

555

606

No ? ?
offset No15

555

606

No ? ?
recommendedFieldOfView No No No No ? ?
renderHeight No15

555

606

No ? ?
renderRect No No No No ? ?
renderWidth No15

555

606

No ? ?
FeatureAndroid webviewChrome for AndroidEdge mobileFirefox for AndroidOpera AndroidiOS SafariSamsung Internet
Basic support No561 2 3 4 ? ? ? ?6.0
fieldOfView No561 2 3 4 ? ? ? ?6.0
maximumFieldOfView No No No ? ? ? No
minimumFieldOfView No No No ? ? ? No
offset No561 2 3 4 ? ? ? ?6.0
recommendedFieldOfView No No No ? ? ? No
renderHeight No561 2 3 4 ? ? ? ?6.0
renderRect No No No ? ? ? No
renderWidth No561 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

Document Tags and Contributors

Contributors to this page: connorshea, jpmedley, Toji, fscholz, chrisdavidmills, abbycar, Sebastianz
Last updated by: connorshea,