XRLightEstimate

The XRLightEstimate interface of the WebXR Device API provides the estimated lighting values for an XRLightProbe at the time represented by an XRFrame.

To get an XRLightEstimateobject, call the XRFrame.getLightEstimate() method.

XRLightEstimate.primaryLightDirection Read only

A DOMPointReadOnly representing the direction to the primary light source from the probeSpace of an XRLightProbe.

XRLightEstimate.primaryLightIntensity Read only

A DOMPointReadOnly (with the x, y, z values mapped to RGB) representing the intensity of the primary light source from the probeSpace of an XRLightProbe.

XRLightEstimate.sphericalHarmonicsCoefficients Read only

A Float32Array containing 9 spherical harmonics coefficients.

None.

First, use the XRSession.requestLightProbe() method to get a light probe from a session. Then, within an XRFrame loop, the getLightEstimate() method will return a XRLightEstimate object containing the lighting values for each frame.

const lightProbe = await xrSession.requestLightProbe();

// frame loop
function onXRFrame(time, xrFrame) {
  let lightEstimate = xrFrame.getLightEstimate(lightProbe);

  // Use light estimate data to light the scene

  // Available properties
  lightEstimate.sphericalHarmonicsCoefficients;
  lightEstimate.primaryLightDirection;
  lightEstimate.primaryLightIntensity;
}

• XRFrame.getLightEstimate()