| Server IP : 68.178.172.28 / Your IP : 216.73.216.152 Web Server : Apache System : Linux 28.172.178.68.host.secureserver.net 4.18.0-553.94.1.el8_10.x86_64 #1 SMP Mon Jan 19 05:45:41 EST 2026 x86_64 User : kiskarnal ( 1003) PHP Version : 8.1.34 Disable Function : NONE MySQL : OFF | cURL : ON | WGET : ON | Perl : ON | Python : ON | Sudo : ON | Pkexec : ON Directory : /opt/python38/lib/python3.8/turtledemo/__pycache__/ |
Upload File : |
U
�i�_ � @ s` d Z ddlmZmZmZmZ dZG dd� de�Z G dd� de�Z
dd � Z e d
kr\e � e� d S ) a� 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.
� )�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 �9/opt/python38/lib/python3.8/turtledemo/planet_and_moon.py�__init__ s zGravSys.__init__c C s | j D ] }|�� qd S )N)r �init)r �pr r r
r s
z GravSys.initc C s6 t d�D ](}| j| j7 _| jD ] }|�� q"qd 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 )N� �?)r r
�acc�ar �r r
r r r
r 1 s
z Star.initc C sR t dd�}| jjD ]:}|| kr|�� | �� }|t|j t|�d | 7 }q|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 < 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' r! zDone!)r �resetZ getscreenZtracerZhtZpu�fd�ltZ
begin_polyr0 Zend_polyZget_polyr Z addcomponentZregister_shaper r r& ZcolorZ shapesizeZpencolorr r )�sZm1Zm2Z planetshapeZgsZsunZearthZmoonr r r
�mainF sD
r8 �__main__N)
�__doc__Zturtler r r r r& r( �objectr r r8 r r r r r
�<module> s '