c# - Get limit of the human body in Kinect -

i need resolve situation:

need ends of body of person through kinect sensor. thus, need x, y coordinates of each point. have logic it, move skeleton points end of body of person, not know how carry out such operation.

here picture of of points wanted get.

they start points of starting points, are: head, sholder hight, left sholder, hip hight , left hip. please me. i'm sorry text, not speak english. i'm using google translator help.