Bones – connecting joints

Bones are the visual representation between joints. They don't have any physical presence and that is why we are calling them virtual. The complete hierarchy of a skeleton is composed of a series of bones, which is the connection of all the tracked joints with the joint collection of that skeleton.

The skeleton representation is a hierarchical representation of a bone and each bone in a skeleton hierarchy has a parent joint and a child joint. This also implies that every joint can be a parent and child joint unless it is a leaf joint, such as Head Joint, Hand Joints, and so on. Parent joints are always above child joints in the hierarchy.

For example, consider the Right Leg of a skeleton which consists of Hip Center, Hip Right, Knee Right, Ankle Right, and Foot Right joints. Now for a bone between Hip Center and Hip Right, Hip Center is the parent and Hip Right is the child. Similarly, for another bone between Hip Right and Knee Right, Hip Right is a parent joint...