exports.partNames = [
  'nose', 'leftEye', 'rightEye', 'leftEar', 'rightEar', 'leftShoulder',
  'rightShoulder', 'leftElbow', 'rightElbow', 'leftWrist', 'rightWrist',
  'leftHip', 'rightHip', 'leftKnee', 'rightKnee', 'leftAnkle', 'rightAnkle',
];
exports.NUM_KEYPOINTS = exports.partNames.length;
exports.partIds = exports.partNames.reduce((result, jointName, i) => {
  result[jointName] = i;
  return result;
}, {});
const connectedPartNames = [
  ['leftHip', 'leftShoulder'], ['leftElbow', 'leftShoulder'],
  ['leftElbow', 'leftWrist'], ['leftHip', 'leftKnee'],
  ['leftKnee', 'leftAnkle'], ['rightHip', 'rightShoulder'],
  ['rightElbow', 'rightShoulder'], ['rightElbow', 'rightWrist'],
  ['rightHip', 'rightKnee'], ['rightKnee', 'rightAnkle'],
  ['leftShoulder', 'rightShoulder'], ['leftHip', 'rightHip'],
];
/*
 * Define the skeleton. This defines the parent->child relationships of our
 * tree. Arbitrarily this defines the nose as the root of the tree, however
 * since we will infer the displacement for both parent->child and
 * child->parent, we can define the tree root as any node.
 */
exports.poseChain = [
  ['nose', 'leftEye'], ['leftEye', 'leftEar'], ['nose', 'rightEye'],
  ['rightEye', 'rightEar'], ['nose', 'leftShoulder'],
  ['leftShoulder', 'leftElbow'], ['leftElbow', 'leftWrist'],
  ['leftShoulder', 'leftHip'], ['leftHip', 'leftKnee'],
  ['leftKnee', 'leftAnkle'], ['nose', 'rightShoulder'],
  ['rightShoulder', 'rightElbow'], ['rightElbow', 'rightWrist'],
  ['rightShoulder', 'rightHip'], ['rightHip', 'rightKnee'],
  ['rightKnee', 'rightAnkle'],
];
exports.connectedPartIndices = connectedPartNames.map(([jointNameA, jointNameB]) => ([exports.partIds[jointNameA], exports.partIds[jointNameB]]));
exports.partChannels = [
  'left_face',
  'right_face',
  'right_upper_leg_front',
  'right_lower_leg_back',
  'right_upper_leg_back',
  'left_lower_leg_front',
  'left_upper_leg_front',
  'left_upper_leg_back',
  'left_lower_leg_back',
  'right_feet',
  'right_lower_leg_front',
  'left_feet',
  'torso_front',
  'torso_back',
  'right_upper_arm_front',
  'right_upper_arm_back',
  'right_lower_arm_back',
  'left_lower_arm_front',
  'left_upper_arm_front',
  'left_upper_arm_back',
  'left_lower_arm_back',
  'right_hand',
  'right_lower_arm_front',
  'left_hand',
];