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HomeBackend DevelopmentPython Tutorialpython海龟绘图实例教程

本文以实例形式介绍了python turtle模块即海龟绘图的使用方法,对于需要进行图形编程的朋友相信会有一定的借鉴价值。

python turtle模块简介:
 python2.6版本中引入的一个简单的绘图工具,叫做海龟绘图(Turtle Graphics)

1.使用海龟绘图首先我们需要导入turtle,如下所示:

 from turtle import * #将turtle中的所有方法导入

2.海龟绘图属性:

 (1)位置
 (2)方向
 (3)画笔(画笔的属性,颜色、画线的宽度)

3.操纵海龟绘图有着许多的命令,这些命令可以划分为两种:一种为运动命令,一种为画笔控制命令

(1)运动命令:

  forward(degree)  #向前移动距离degree代表距离
  backward(degree)  #向后移动距离degree代表距离
  right(degree)    #向右移动多少度
 left(degree)  #向左移动多少度
 goto(x,y)  #将画笔移动到坐标为x,y的位置
  stamp()     #复制当前图形
 speed(speed)  #画笔绘制的速度范围[0,10]整数

(2)画笔控制命令:

 down() #移动时绘制图形,缺省时也为绘制
 up() #移动时不绘制图形
 pensize(width) #绘制图形时的宽度
 color(colorstring) #绘制图形时的颜色
 fillcolor(colorstring) #绘制图形的填充颜色
 fill(Ture)
 fill(false)

4.关于turtle简介许多下面我们看个实例:

(一)绘制正方形:

 import turtle
 import time
#定义绘制时画笔的颜色
 turtle.color("purple")
#定义绘制时画笔的线条的宽度
 turtle.size(5)
#定义绘图的速度 
turtle.speed(10)
#以0,0为起点进行绘制
 turtle.goto(0,0)
#绘出正方形的四条边
 for i in range(4):
   turtle.forward(100)
   turtle.right(90)
#画笔移动到点(-150,-120)时不绘图
 turtle.up()
 turtle.goto(-150,-120)
#再次定义画笔颜色
 turtle.color("red")
#在(-150,-120)点上打印"Done"
 turtle.write("Done")
 time.sleep(3)

(二)绘制五角星:

import turtle
import time
turtle.color("purple")
turtle.pensize(5)
turtle.goto(0,0)
turtle.speed(10)
for i in range(6):
 turtle.forward(100)
 turtle.right(144)
turtle.up()
turtle.forward(100)
turtle.goto(-150,-120)
turtle.color("red")
turtle.write("Done")
time.sleep(3)

这里给出了两个简单的实例,大家可以根据上面的思路与方法进一步拓展,绘制出一些更复杂的图形。

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