chromium/src/third_party/blink/renderer/modules/xr/xr_hand.idl

// Copyright 2020 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

//https://immersive-web.github.io/webxr-hand-input/#idl-index
enum XRHandJoint {
  "wrist",
  "thumb-metacarpal",
  "thumb-phalanx-proximal",
  "thumb-phalanx-distal",
  "thumb-tip",
  "index-finger-metacarpal",
  "index-finger-phalanx-proximal",
  "index-finger-phalanx-intermediate",
  "index-finger-phalanx-distal",
  "index-finger-tip",
  "middle-finger-metacarpal",
  "middle-finger-phalanx-proximal",
  "middle-finger-phalanx-intermediate",
  "middle-finger-phalanx-distal",
  "middle-finger-tip",
  "ring-finger-metacarpal",
  "ring-finger-phalanx-proximal",
  "ring-finger-phalanx-intermediate",
  "ring-finger-phalanx-distal",
  "ring-finger-tip",
  "pinky-finger-metacarpal",
  "pinky-finger-phalanx-proximal",
  "pinky-finger-phalanx-intermediate",
  "pinky-finger-phalanx-distal",
  "pinky-finger-tip"
};

//https://immersive-web.github.io/webxr-hand-input/#idl-index
[
    SecureContext,
    Exposed=Window,
    RuntimeEnabled=WebXRHandInput
] interface XRHand {
    iterable<XRHandJoint, XRJointSpace>;

    readonly attribute unsigned long size;
    XRJointSpace get(XRHandJoint key);
};