XRRay

Limited availability

This feature is not Baseline because it does not work in some of the most widely-used browsers.

Secure context: This feature is available only in secure contexts (HTTPS), in some or all supporting browsers.

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

The XRRay interface of the WebXR Device API is a geometric ray described by an origin point and a direction vector.

XRRay objects can be passed to XRSession.requestHitTestSource() or XRSession.requestHitTestSourceForTransientInput() to perform hit testing.

Constructor

XRRay() Experimental

Creates a new XRRay object.

Instance properties

XRRay.direction Read only Experimental

A DOMPointReadOnly representing the ray's 3-dimensional directional vector.

XRRay.matrix Read only Experimental

A transform that can be used to position objects along the XRRay. This is a 4 by 4 matrix given as a 16 element Float32Array in column major order.

XRRay.origin Read only Experimental

A DOMPointReadOnly representing the 3-dimensional point in space that the ray originates from, in meters.

Instance methods

None.

Examples

Using XRRay to request a hit test source

The XRSession.requestHitTestSource() method takes an XRRay object for its offsetRay option. In this example, the hit test source is positioned slightly above the viewer as the application has some UI elements at the bottom while wanting to maintain the perception of a centered cursor.

js
const xrSession = navigator.xr.requestSession("immersive-ar", {
  requiredFeatures: ["local", "hit-test"],
});

let hitTestSource = null;

xrSession
  .requestHitTestSource({
    space: viewerSpace, // obtained from xrSession.requestReferenceSpace("viewer");
    offsetRay: new XRRay({ y: 0.5 }),
  })
  .then((viewerHitTestSource) => {
    hitTestSource = viewerHitTestSource;
  });

Specifications

Specification
WebXR Hit Test Module
# xrray-interface

Browser compatibility

Report problems with this compatibility data on GitHub
desktopmobile
Chrome
Edge
Firefox
Opera
Safari
Chrome Android
Firefox for Android
Opera Android
Safari on iOS
Samsung Internet
WebView Android
WebView on iOS
XRRay
Experimental
XRRay() constructor
Experimental
direction
Experimental
matrix
Experimental
origin
Experimental

Legend

Tip: you can click/tap on a cell for more information.

Full support
Full support
No support
No support
Experimental. Expect behavior to change in the future.
See implementation notes.

See also