VRLayerInit.leftBounds
Deprecated
This feature is no longer recommended. Though some browsers might still support it, it may have already been removed from the relevant web standards, may be in the process of being dropped, or may only be kept for compatibility purposes. 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 leftBounds
property of the VRLayerInit
interface (dictionary) defines the left texture bounds of the canvas whose contents will be presented by the VRDisplay
.
Syntax
var myVRLayerInit = { };
myVRLayerInit.leftBounds = [0.0, 0.0, 0.5, 1.0];
Value
An array of four floating point values, which can take values from 0.0–1.0:
- The left offset of the bounds.
- The top offset of the bounds.
- The width of the bounds.
- The height of the bounds.
If leftBounds
is not specified in the dictionary, the default value used is [0.0, 0.0, 0.5, 1.0]
.
Examples
// 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
Specifications
Specification | Status | Comment |
---|---|---|
WebVR 1.1 The definition of 'leftBounds' in that specification. |
Draft | Initial definition |
Browser compatibility
BCD tables only load in the browser
See also
- WebVR API homepage
- https://mixedreality.mozilla.org/ — demos, downloads, and other resources from the Mozilla VR team.