XRLightProbe

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 XRLightProbe interface of the WebXR Device API contains lighting information at a given point in the user's environment. You can get an XRLighting object using the XRSession.requestLightProbe() method.

This object doesn't itself contain lighting values, but it is used to collect lighting states for each XRFrame. See XRLightEstimate for the estimated lighting values for an XRLightProbe.

Instance properties

XRLightProbe.onreflectionchange: Event handler property for the reflectionchange event.
XRLightProbe.probeSpace Read only Experimental: An XRSpace tracking the position and orientation the lighting estimations are relative to.

Instance methods

None.

Events

reflectionchange Experimental: Fired each time the estimated reflection cube map changes. (This happens when the user moves around and the environment's lighting changes.)

Examples

Getting an `XRLightProbe` object for a session

Use the XRSession.requestLightProbe() method to get a light probe.

const lightProbe = await xrSession.requestLightProbe();

Getting a probe pose within an `XRFrame`

Pass the light probe's probeSpace to XRFrame.getPose() to get a light probe for a pose.

const probePose = xrFrame.getPose(lightProbe.probeSpace, xrReferenceSpace);

Using the `reflectionchange` event

Pass XRLightProbe to get a reflection cube map whenever the reflectionchange event fires. See also XRWebGLBinding.getReflectionCubeMap().

const glBinding = new XRWebGLBinding(xrSession, gl);
const lightProbe = await xrSession.requestLightProbe();
let glCubeMap = glBinding.getReflectionCubeMap(lightProbe);

lightProbe.addEventListener("reflectionchange", () => {
  glCubeMap = glBinding.getReflectionCubeMap(lightProbe);
});

Specifications

Specification
WebXR Lighting Estimation API Level 1 # xrlightprobe-interface

Browser compatibility

BCD tables only load in the browser