The fillPoses() method of the XRFrame interface populates a Float32Array with the matrices of the poses relative to a given base space and returns true if successful for all spaces.

spaces

An array of XRSpace objects for which to get the poses.

baseSpace

An XRSpace object to use as the base or origin for the relative position and orientation.

transforms

A Float32Array that is populated with the matrices of the poses relative to the given baseSpace.

A boolean indicating if all of the spaces have a valid pose.

TypeError

Thrown if the length of spaces multiplied by 16 is larger than the number of elements in transforms.

To efficiently get all poses for all 25 joints of each XRHand, you can use the fillPoses() method.

let poses1 = new Float32Array(16 * 25);
let poses2 = new Float32Array(16 * 25);

function onXRFrame(xrFrame, renderer) {
  let hand1 = xrFrame.session.inputSources[0].hand;
  xrFrame.fillPoses(hand1.values(), renderer.referenceSpace, poses1);
  let hand2 = xrFrame.session.inputSources[1].hand;
  xrFrame.fillPoses(hand2.values(), renderer.referenceSpace, poses2);
}

• XRHand
• XRJointSpace
• Float32Array