Need help for to create a polygon drawer in a figure window

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Jacob Kiem 2018-5-26

评论： Jacob Kiem 2018-5-27

Hey, So i have to create a polygon drawer in a figure window but i have no idea on how to do it. These are some of the requirements:

Must use plots
The program needs to read the position of the mouse cursor every time the user clicks onthe plot
The program needs to draw a line between the previous and current locations of the mousecursor after each click (assuming that the first line is drawn from 0,0 to the position of themouse in first click.
The program displays a corresponding polygon in a window
The program must allow the user to draw lines until (s)he clicks somewhere close to theorigin with the discrepancy of (0±0.1, 0±0.1)
After clicking near the origin, your program should calculate the perimeter of the polygonand display it either in the figure or command window.
The number of clicks registered by your problem should be displace as well.

please try and use comments so i can understand parts of the code. Thanks