This is an experimental technology
Check the Browser compatibility table carefully before using this in production.
The leftBounds
property of the VRLayerInit
interface (dictionary) defines the left texture bounds of the canvas whose contents will be presented by the VRDisplay
.
var myVRLayerInit = { }; myVRLayerInit.leftBounds = [0.0, 0.0, 0.5, 1.0];
An array of four floating point values, which can take values from 0.0–1.0:
If leftBounds
is not specified in the dictionary, the default value used is [0.0, 0.0, 0.5, 1.0]
.
// currently returns an empty array var layers = vrDisplay.getLayers(); if(navigator.getVRDisplays) { console.log('WebVR 1.1 supported'); // Then get the displays attached to the computer navigator.getVRDisplays().then(function(displays) { // If a display is available, use it to present the scene if(displays.length > 0) { 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'); // Here it returns an array of VRLayerInit objects var layers = vrDisplay.getLayers(); ... }); }); } }); }
VRLayerInit
objects look something like this:
{ leftBounds : [ ... ], rightBounds: [ ... ], source: canvasReference }
Note: The canvasReference
refers to the <canvas>
element itself, not the WebGL context associated with the canvas. The other two members are arrays
Specification | Status | Comment |
---|---|---|
WebVR 1.1 The definition of 'leftBounds' in that specification. | Draft | Initial definition |
Desktop | ||||||
---|---|---|---|---|---|---|
Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | |
Basic support | No | Yes | 55
|
No | ? | ? |
Mobile | |||||||
---|---|---|---|---|---|---|---|
Android webview | Chrome for Android | Edge Mobile | Firefox for Android | Opera for Android | iOS Safari | Samsung Internet | |
Basic support | No | 56
|
? | ? | ? | ? | 6.0 |
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Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/API/VRLayerInit/leftBounds