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✏️ tdemo_planet_and_moon.pyo
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� A fc @ s� d Z d d l m Z m Z m Z m Z d d l m Z d Z d e f d � � YZ d e f d � � YZ d � Z e d k r� e � e � n d S( s� turtle-example-suite: tdemo_planets_and_moon.py Gravitational system simulation using the approximation method from Feynman-lectures, p.9-8, using turtlegraphics. Example: heavy central body, light planet, very light moon! Planet has a circular orbit, moon a stable orbit around the planet. You can hold the movement temporarily by pressing the left mouse button with the mouse over the scrollbar of the canvas. i����( t Shapet Turtlet mainloopt Vec2D( t sleepi t GravSysc B s# e Z d � Z d � Z d � Z RS( c C s g | _ d | _ d | _ d S( Ni g{�G�z�?( t planetst tt dt( t self( ( s9 /usr/lib64/python2.7/Demo/turtle/tdemo_planet_and_moon.pyt __init__ s c C s" x | j D] } | j � q Wd S( N( R t init( R t p( ( s9 /usr/lib64/python2.7/Demo/turtle/tdemo_planet_and_moon.pyR s c C sK xD t d � D]6 } | j | j 7_ x | j D] } | j � q/ Wq Wd S( Ni' ( t rangeR R R t step( R t iR ( ( s9 /usr/lib64/python2.7/Demo/turtle/tdemo_planet_and_moon.pyt start! s ( t __name__t __module__R R R ( ( ( s9 /usr/lib64/python2.7/Demo/turtle/tdemo_planet_and_moon.pyR s t Starc B s, e Z d � Z d � Z d � Z d � Z RS( c C sp t j | d | �| j � | | _ | j | � | | _ | j j | � | | _ | j d � | j � d S( Nt shapet user( R R t penupt mt setpost vR t appendt gravSyst resizemodet pendown( R R t xR R R ( ( s9 /usr/lib64/python2.7/Demo/turtle/tdemo_planet_and_moon.pyR ( s c C s: | j j } | j � | _ | j d | | j | _ d S( Ng �?( R R t acct aR ( R R ( ( s9 /usr/lib64/python2.7/Demo/turtle/tdemo_planet_and_moon.pyR 2 s c C sr t d d � } x\ | j j D]N } | | k r | j � | j � } | t | j t | � d | 7} q q W| S( Ni i ( t VecR R t post GR t abs( R R t planetR ( ( s9 /usr/lib64/python2.7/Demo/turtle/tdemo_planet_and_moon.pyR 6 s *c C s� | j j } | j | j � | | j � | j j j | � d k rh | j | j | j j d � � n | j � | _ | j | | j | _ d S( Ni ( R R R R" R R t indext setheadingt towardsR R ( R R ( ( s9 /usr/lib64/python2.7/Demo/turtle/tdemo_planet_and_moon.pyR = s #( R R R R R R ( ( ( s9 /usr/lib64/python2.7/Demo/turtle/tdemo_planet_and_moon.pyR ' s c C s� t � } | j � | j d d � | j � | j � | j d � | j d � | j � | j d d � | j � | j � } | j � | j d d � | j � | j � } t d � } | j | d � | j | d � | j � j d | � | j d d � t � } t d t d d � t d d � | d � } | j d � | j d � | j � t d t d d � t d d � | d � } | j d � | j d � t d t d d � t d d � | d � } | j d � | j d � | j � | j � d S( Ni i iZ i� t compoundt oranget blueR% i i@B g �t circlet yellowg������?i�0 i� i� t greeng�������?i� i' g �?s Done!( R t resett tracert htt put fdt ltt begin_polyR, t end_polyt get_polyR t addcomponentt getscreent register_shapeR R R! t colort shapesizet pencolorR R ( t st m1t m2t planetshapet gst sunt eartht moon( ( s9 /usr/lib64/python2.7/Demo/turtle/tdemo_planet_and_moon.pyt mainG sD * * * t __main__N( t __doc__t turtleR R R R R! t timeR R# t objectR R RF R ( ( ( s9 /usr/lib64/python2.7/Demo/turtle/tdemo_planet_and_moon.pyt <module> s " '
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