笔记:python画图,turtle库的使用,用turtle画蟒蛇,(一)turtle的基础知识

淡淡的烟草味﹌ 2023-07-08 09:13 13阅读 0赞

# 用turtle画蟒蛇,(一)turtle的基础知识 #

本文内容为参加北京理工嵩山老师python课学习笔记

最好的参考,官方文档:[https://docs.python.org/zh-cn/3/library/turtle.html][https_docs.python.org_zh-cn_3_library_turtle.html]

# 模块1: turtle库的使用 #

## \-turtle库基本介绍 ##

turtle库概述  
turtle(海龟)库是turtle绘图体系的Python实现  
\-turtle绘图体系: 1969年诞生,主要用于程序设计入门  
\-Python语言的标准库之一  
\-入门级的图形绘制函数库

### Python计算生态=标准库+第3三方库 ###

\-标准库:随解释器直接安装到操作系统中的功能模块  
\-第三方库:需要经过安装才能使用的功能模块  
\-库Library、包Package、 模块Module ，统称模块

# \-turtle绘图窗体布局 #

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2FobWN3dA_size_16_color_FFFFFF_t_70][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2FobWN3dA_size_16_color_FFFFFF_t_70 1][]

.setup()不是必须的,在需要控制窗体的大小和位置时用.

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2FobWN3dA_size_16_color_FFFFFF_t_70 2][]

.setup()后两个参数缺省时,表示窗体中心位于屏幕正中心.

--------------------

## \-turtle空间坐标体系 ##

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2FobWN3dA_size_16_color_FFFFFF_t_70 3][]

### 海龟坐标系相对于窗体画布 ###

.goto(x,y),到指定位置,

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2FobWN3dA_size_16_color_FFFFFF_t_70 4][]

## ![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2FobWN3dA_size_16_color_FFFFFF_t_70 5][] ##

##    \-turtle角度坐标体系 ##

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2FobWN3dA_size_16_color_FFFFFF_t_70 6][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2FobWN3dA_size_16_color_FFFFFF_t_70 7][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2FobWN3dA_size_16_color_FFFFFF_t_70 8][]

从海龟前进的方向,设置改变其前进的方向.

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2FobWN3dA_size_16_color_FFFFFF_t_70 9][]

##    \-RGB色彩体系   ![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2FobWN3dA_size_16_color_FFFFFF_t_70 10][] ##

常用RGB色:

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2FobWN3dA_size_16_color_FFFFFF_t_70 11][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2FobWN3dA_size_16_color_FFFFFF_t_70 12][]

turtle库默认采用小数值来表示颜色,也可用整数:

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2FobWN3dA_size_16_color_FFFFFF_t_70 13][]

turtle.colormode(mode)中的mode,如果用1.0,则后续就要用小数表示颜色;如果是255模式,则后续采用整数值来改变颜色.

# 小结: #

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2FobWN3dA_size_16_color_FFFFFF_t_70 14][]

### 其中海龟坐标和海龟角度都是以海龟当前的位置和朝向为准. ###

[用turtle画蟒蛇,(二)turtle程序语法元素分析][turtle_turtle]

[https_docs.python.org_zh-cn_3_library_turtle.html]: https://docs.python.org/zh-cn/3/library/turtle.html
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[turtle_turtle]: https://mp.csdn.net/console/editor/html/104506779