KeyPoint, Position, and BodyPart classes in details.

PoseNet library: KeyPoint, Position, BodyPart

// KeyPoint class holds information about each bodyPart, position, and score.
class KeyPoint {
  var bodyPart: BodyPart = BodyPart.NOSE
  var position: Position = Position()
  var score: Float() = 0.0f
}

// Position class contains the x and y coordinates of a key point on the bitmap. 
class Position {
  var x: Int = 0
  var y: Int = 0
}

// BodyPart class holds the names of seventeen body parts.
enum class BodyPart {
  NOSE, 
  LEFT_EYE, 
  RIGHT_EYE, 
  ... 
  RIGHT_ANKLE
}