turtle库的使用:
概括:
-
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
原理:
turtle的原(wan)理(fa)
(turtle(海龟)是一种真实的存在)
-
有一只海龟,其实在窗体正中心,在画布上游走
-
走过的轨迹形成了绘制的图形
-
海龟由程序控制,可以变换颜色、改变宽度等
import turtle turtle.goto( 100, 100) turtle.goto( 100,-100) turtle.goto(-100,-100) turtle.goto(-100, 100) turtle.goto(0,0) #goto : 到达那个点 turtle.seth(angle) seth()改变海龟行进方向 angle为绝对度数 seth()只改变方向但不行进
-
turtle.setup( , , , ) #创建画布(长
turtle.fd() #前进
turtle.circle( , )#画圆
turtle.pensize()#画笔大小
turtle.penup() #抬笔
turtle.pendown()#落笔
turtle.seth()#比的方向
turtle.pencolor("")画笔的颜色
turtle.speed('fast')#0~10
```
```python
import turtle
turtle.left(45)
turtle.fd(150)
turtle.right(135)
turtle.fd(300)
turtle.left(135)
turtle.fd(150)
```
## RGB色彩模式
#### 由三种颜色构成的万物色
- ##### RGB指红蓝绿三个通道的颜色组合
- ##### 覆盖视力所能感知的所有颜色
- ##### RGB每色取值范围0-255整数或0-1小数
trutle库的成品(玫瑰花):
import turtle
设置初始位置
turtle.setup(1500,800)
turtle.penup()
turtle.left(90)
turtle.fd(200)
turtle.pendown()
turtle.right(90)
花蕊
turtle.fillcolor("red")
turtle.begin_fill()
turtle.circle(10, 180)
turtle.circle(25, 110)
turtle.left(50)
turtle.circle(60, 45)
turtle.circle(20, 170)
turtle.right(24)
turtle.fd(30)
turtle.left(10)
turtle.circle(30, 110)
turtle.fd(20)
turtle.left(40)
turtle.circle(90, 70)
turtle.circle(30, 150)
turtle.right(30)
turtle.fd(15)
turtle.circle(80, 90)
turtle.left(15)
turtle.fd(45)
turtle.right(165)
turtle.fd(20)
turtle.left(155)
turtle.circle(150, 80)
turtle.left(50)
turtle.circle(150, 90)
turtle.end_fill()
花瓣1
turtle.left(150)
turtle.circle(-90, 70)
turtle.left(20)
turtle.circle(75, 105)
turtle.setheading(60)
turtle.circle(80, 98)
turtle.circle(-90, 40)
花瓣2
turtle.left(180)
turtle.circle(90, 40)
turtle.circle(-80, 98)
turtle.setheading(-83)
叶子1
turtle.fd(30)
turtle.left(90)
turtle.fd(25)
turtle.left(45)
turtle.fillcolor("green")
turtle.begin_fill()
turtle.circle(-80, 90)
turtle.right(90)
turtle.circle(-80, 90)
turtle.end_fill()
turtle.right(135)
turtle.fd(60)
turtle.left(180)
turtle.fd(85)
turtle.left(90)
turtle.fd(80)
叶子2
turtle.right(90)
turtle.right(45)
turtle.fillcolor("green")
turtle.begin_fill()
turtle.circle(80, 90)
turtle.left(90)
turtle.circle(80, 90)
turtle.end_fill()
turtle.left(135)
turtle.fd(60)
turtle.left(180)
turtle.fd(60)
turtle.right(90)
turtle.circle(200, 60)
turtle.done()