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HMDVRDevice.getEyeParameters()

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Obsolete
This feature is obsolete. Although it may still work in some browsers, its use is discouraged since it could be removed at any time. Try to avoid using it.

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 getEyeParameters() method of the HMDVRDevice interface returns current parameters for the eye specified as its argument ("left" or "right") — stored in a VREyeParameters object.

This includes field of view information, and more.

Syntax

var myLeftEye = HMDVRDevice.getEyeParameters('left');

Parameters

whichEye
A DOMString representing the eye you want to return information about. The value can be left or right.

Returns

A VREyeParameters object.

Examples

The following example is taken from the Mozilla VR Team's threejs-vr-boilerplate code — to be precise, the VREffect.js file. Early on in the code the getEyeParameters() method is used to access information about each eye, which is then used for rendering calulations later on.

if ( vrHMD.getEyeParameters !== undefined ) {
    var eyeParamsL = vrHMD.getEyeParameters( 'left' );
    var eyeParamsR = vrHMD.getEyeParameters( 'right' );

    eyeTranslationL = eyeParamsL.eyeTranslation;
    eyeTranslationR = eyeParamsR.eyeTranslation;
    eyeFOVL = eyeParamsL.recommendedFieldOfView;
    eyeFOVR = eyeParamsR.recommendedFieldOfView;
} else {
  ...
}

Specifications

Specification Status Comment
WebVR
The definition of 'getEyeParameters()' in that specification.
Editor's Draft Initial definition

Browser compatibility

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari (WebKit)
Basic support (Yes)[1] 39 (39)[2] No support No support No support
Feature Android Firefox Mobile (Gecko) Firefox OS (Gecko) IE Phone Opera Mobile Safari Mobile Chrome for Android
Basic support No support 39.0 (39)[2]
44.0 (44)[3]
No support No support No support No support No support
  • [1] The support in Chrome is currently experimental. To find information on Chrome's WebVR implementation status including supporting builds, check out Bringing VR to Chrome by Brandon Jones.
  • [2] The support for this feature is currently disabled by default in Firefox. To enable WebVR support in Firefox Nightly/Developer Edition, you can go to about:config and enable the dom.vr* prefs. A better option however is to install the WebVR Enabler Add-on, which does this for you and sets up other necessary parts of the environment.
  • [3] The dom.vr* prefs are enabled by default at this point, in Nightly/Aurora editions.

See also

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