File: //usr/local/lib/python3.7/turtledemo/__pycache__/planet_and_moon.cpython-37.opt-2.pyc
B
"��g � @ s\ d dl mZmZmZmZ dZG dd� de�ZG dd� de�Z dd� Z
e d krXe
� e� d
S ) � )�Shape�Turtle�mainloop�Vec2D� c @ s$ e Zd Zdd� Zdd� Zdd� ZdS )�GravSysc C s g | _ d| _d| _d S )Nr g{�G�z�?)�planets�t�dt)�self� r �6/usr/local/lib/python3.7/turtledemo/planet_and_moon.py�__init__ s zGravSys.__init__c C s x| j D ] }|�� qW d S )N)r �init)r �pr r r
r s z GravSys.initc C s> x8t d�D ],}| j| j7 _x| jD ] }|�� q&W q
W d S )Ni' )�ranger r
r �step)r �ir r r r
�start s z
GravSys.startN)�__name__�
__module__� __qualname__r r r r r r r
r s r c @ s, e Zd Zdd� Zdd� Zdd� Zdd� Zd S )
�Starc C sT t j| |d� | �� || _| �|� || _|j�| � || _| � d� | �
� d S )N)�shape�user) r r Zpenup�m�setpos�vr �append�gravSysZ
resizemodeZpendown)r r �xr r r r r r
r ' s
z
Star.__init__c C s, | j j}| �� | _| jd| | j | _d S )Ng �?)r r
�acc�ar )r r
r r r
r 1 s
z Star.initc C sV t dd�}xF| jjD ]:}|| kr|�� | �� }|t|j t|�d | 7 }qW |S )Nr � )�Vecr r �pos�Gr �abs)r r" �planetr r r r
r! 5 s
"zStar.accc C sj | j j}| �| �� || j � | j j�| �dkrJ| �| �| j jd �� | � � | _
| j|| j
| _d S )Nr ) r r
r r% r r �indexZ
setheadingZtowardsr! r" )r r
r r r
r < s
z Star.stepN)r r r r r r! r r r r r
r & s
r c C s| t � } | �� | �� �dd� | �� | �� | �d� | �d� | �� | � dd� | �
� | � � }| �� | � dd� | �
� | � � }t d�}|�
|d� |�
|d� | �� �d|� | �� �d d� t� }td
tdd�tdd �|d �}|�d
� |�d� |�� tdtdd�tdd�|d�}|�d� |�d� td tdd�tdd�|d�}|�d� |�d� |�� |�� dS )Nr � �Z � ZcompoundZorangeZbluer( � i@B g ��circleZyellowg������?i�0 �� �� Zgreeng�������?�� i' g �?zDone!)r �resetZ getscreenZtracerZhtZpu�fd�ltZ
begin_polyr. Zend_polyZget_polyr Z addcomponentZregister_shaper r r$ ZcolorZ shapesizeZpencolorr r )�sZm1Zm2Z planetshapeZgsZsunZearthZmoonr r r
�mainF sD
r6 �__main__N) Zturtler r r r r$ r& �objectr r r6 r r r r r
�<module> s '