Turtle,也叫海龟渲染器,使用Turtle库画图也叫海龟作图。Turtle库是Python语言中一个很流行的绘制图像的函数库。海龟渲染器,和各种三维软件都有着良好的结合。功能强大,使用方便。该渲染器的特色在于其渲染速度可以优海龟渲染器,和各种三维软件都有着良好的结合。使用之前需要导入库:import turtle
绘图命令
操纵海龟绘图有着许多的命令,这些命令可以划分为3种:
一种为运动命令; 一种为画笔控制命令; 还有一种是全局控制命令;
(1) 画笔运动命令:
命令 | 说明 |
---|---|
turtle.forward(distance) | 向当前画笔方向移动distance像素长 |
turtle.backward(distance) | 向当前画笔相反方向移动distance像素长度 |
turtle.right(degree) | 顺时针移动degree° |
turtle.left(degree) | 逆时针移动degree° |
turtle.pendown() | 移动时绘制图形,缺省时也为绘制 |
turtle.goto(x,y) | 将画笔移动到坐标为x,y的位置 |
turtle.penup() | 移动时不绘制图形,提起笔,用于另起一个地方绘制时用 |
turtle.speed(speed) | 画笔绘制的速度范围[0,10]整数 |
turtle.circle() | 画圆,半径为正(负),表示圆心在画笔的左边(右边)画圆 |
(2) 画笔控制命令:
命令 | 说明 |
---|---|
turtle.pensize(width) | 绘制图形时的宽度 |
turtle.pencolor() | 画笔颜色 |
turtle.fillcolor(colorstring) | 绘制图形的填充颜色 |
turtle.color(color1, color2) | 同时设置pencolor=color1, fillcolor=color2 |
turtle.filling() | 返回当前是否在填充状态 |
turtle.begin_fill() | 准备开始填充图形 |
turtle.end_fill() | 填充完成; |
turtle.hideturtle() | 隐藏箭头显示; |
turtle.showturtle() | 与hideturtle()函数对应 |
(3) 全局控制命令
命令 | 说明 |
---|---|
turtle.clear() | 清空turtle窗口,但是turtle的位置和状态不会改变 |
turtle.reset() | 清空窗口,重置turtle状态为起始状态 |
turtle.undo() | 撤销上一个turtle动作 |
turtle.isvisible() | 返回当前turtle是否可见 |
stamp() | 复制当前图形 |
turtle.write(s[,font=("font-name",fontsize,"fonttype")]) | 写文本,s为文本内容,font是字体的参数,里面分别为字体名称,大小和类型;font为可选项, font的参数也是可选项 |
(4)命令详解
turtle.colormode(mode)
1.0:RGB小数模式 255:RGB整数模式
turtle.penup()
别名turtle.pu()
画笔抬起,不留下痕迹turtle.pendown()
别名turtle.pd()`画笔落下,留下痕迹turtle.pensize(width)
别名turtle.width(width)
画笔宽度turtle.pencolor(color)
turtle.pencolor("purple")颜色字符串 turtle.pencolor(0.63,0.13,0.94)RGB的小数值 turtle.pencolor((0.63,0.13,0.94))RGB的元组值
turtle.forword(d)
别名turtle.fd(d)
向前行进 d:行进距离,可以为负数turtle.circle(r,extent=None)
根据半径r,绘制一个extent角度的弧度 r:默认圆心在海龟左侧r距离的位置turtle.setheading(angle)
别名turtle.seth(angle)
改变行进方向angle
:改变方向的角度(绝对坐标下,绝对角度)turtle.left(angle)
turtle.right(angle)
angle:当前方向上转过得角度
让我们用 “社会人” 的方式来练习一下
from turtle import *def nose(x,y):
"""画鼻子"""
pensize(5)
pencolor((255, 155, 192))
penup()
# 将海龟移动到指定的坐标
goto(x,y)
pendown()
# 设置海龟的方向(0-东、90-北、180-西、270-南)
setheading(-30)
begin_fill()
fillcolor(255, 192, 203)
a = 0.4
for i in range(120):
if 0 <= i < 30 or 60 <= i <90:
a = a + 0.08
# 向左转3度
left(3)
# 向前走
forward(a)
else:
a = a - 0.08
left(3)
forward(a)
end_fill()
penup()
setheading(90)
forward(25)
setheading(0)
forward(10)
pendown()
# 设置画笔的颜色(红, 绿, 蓝)
pencolor(255, 155, 192)
setheading(10)
begin_fill()
circle(5)
color(160, 82, 45)
end_fill()
penup()
setheading(0)
forward(20)
pendown()
pencolor(255, 155, 192)
setheading(10)
begin_fill()
circle(5)
color(160, 82, 45)
end_fill()def head(x, y):
"""画头"""
color((255, 155, 192), "pink")
penup() goto(x,y) setheading(0) pendown() begin_fill()
setheading(180) circle(300, -30) circle(100, -60)
circle(80, -100) circle(150, -20) circle(60, -95)
setheading(161) circle(-300, 15) penup()
goto(-100, 100) pendown() setheading(-30)
a = 0.4 for i in range(60):
if 0<= i < 30 or 60 <= i < 90:
a = a + 0.08
lt(3) #向左转3度
fd(a) #向前走a的步长
else:
a = a - 0.08
lt(3)
fd(a)
end_fill()
def ears(x,y):
"""画耳朵"""
color((255, 155, 192), "pink")
penup()
goto(x, y)
pendown()
begin_fill()
setheading(100)
circle(-50, 50)
circle(-10, 120)
circle(-50, 54)
end_fill()
penup()
setheading(90)
forward(-12)
setheading(0)
forward(30)
pendown()
begin_fill()
setheading(90)
circle(-50, 50) circle(-10, 120) circle(-50, 56) end_fill()def eyes(x,y):
"""画眼睛""" color((255, 155, 192), "white") penup() setheading(90)
forward(-20) setheading(0) forward(-95) pendown() begin_fill()
circle(15) end_fill() color("black") penup() setheading(90)
forward(12) setheading(0) forward(-3) pendown()
begin_fill() circle(3) end_fill() color((255, 155, 192), "white")
penup() seth(90) forward(-25) seth(0) forward(40) pendown()
begin_fill() circle(15) end_fill() color("black") penup() setheading(90) forward(12) setheading(0) forward(-3) pendown() begin_fill() circle(3) end_fill()def cheek(x,y): """画脸颊""" color((255, 155, 192)) penup() goto(x,y) pendown() setheading(0) begin_fill() circle(30) end_fill()def mouth(x,y): """画嘴巴""" color(239, 69, 19) penup() goto(x, y) pendown() setheading(-80) circle(30, 40) circle(40, 80)def body(x,y): '''画身体''' penup() goto(x,y) pencolor('red') fillcolor(250,106,106) pendown() begin_fill() setheading(-66) circle(-450,17) setheading(180) forward(185) setheading(85) circle(-450,17) end_fill() '''右手''' penup() goto(110,-45) pendown() pensize(8) pencolor(255, 192, 203) setheading(30) circle(-400,10) penup() goto(167,-5) pendown() setheading(-120) forward(20) left(100) forward(20) '''左手''' penup() goto(-25,-45) pendown() pencolor(255, 192, 203) setheading(150) circle(400,10) penup() goto(-78,-6) pendown() setheading(-60) forward(20) right(100) forward(20)def feet1(x,y): pensize(7) pencolor(255, 192, 203) penup() goto(x,y) setheading(-90) pendown() forward(10) penup() goto(x-12,y-10) pendown() pencolor(238,201,0) fillcolor(238,230,132) begin_fill() setheading(0) forward(24) right(90) forward(36) right(90) forward(40) circle(-10,180) forward(16) left(90) forward(12) end_fill()def feet2(x,y): pensize(7) pencolor(255, 192, 203) penup() goto(x,y) setheading(-90) pendown() forward(10) penup() goto(x-12,y-10) pendown() pencolor(238,201,0) fillcolor(238,230,132) begin_fill() setheading(0) forward(24) right(90) forward(36) right(90) forward(40) circle(-10,180) forward(16) left(90) forward(12) end_fill()def tail(x,y): pensize(8) penup() goto(x,y) pendown() pencolor(255, 192, 203) setheading(-5) circle(30,100) circle(10,180) circle(20,150)def backg(x): penup() goto(-420,x) setheading(0) fillcolor(50,205,50) begin_fill() forward(840) right(90) forward(300) right(90) forward(840) right(90) forward(300) end_fill() setheading(0) fillcolor(0,191,255) begin_fill() forward(840) left(90) forward(600) left(90) forward(840) left(90) forward(600) end_fill()def cloude1(x, y): """画云""" penup() goto(x,y) setheading(90) fillcolor(255,255,255) begin_fill() a = 0.4 for i in range(120): if 0 <= i < 30 or 60 <= i <90: a = a + 0.14 # 向左转3度 left(3) # 向前走 forward(a) else: a = a - 0.15 left(3) forward(a) end_fill()def cloude2(x, y): """画云""" penup() goto(x,y) setheading(90) fillcolor(255,255,255) begin_fill() a = 0.4 for i in range(120): if 0 <= i < 30 or 60 <= i <90: a = a + 0.15 # 向左转3度 left(3) # 向前走 forward(a) else: a = a - 0.13 left(3) forward(a) end_fill()def setting(): """设置参数""" pensize(5) # 隐藏海龟 hideturtle() colormode(255) color((255, 155, 192), "pink") setup(840, 700) speed(10)def main(): """主函数""" setting() backg(0) body(105,-20) nose(-100, 100) head(-69, 167) ears(0, 160) eyes(0, 140) cheek(80, 10) mouth(-20, 30) feet1(10,-150) feet2(90,-150) tail(130,-110) cloude1(-200,200) cloude2(300,300) done()if __name__ == '__main__': main()
turtle作品
1、五角星
import turtle
turtle.color('red','red')
turtle.begin_fill()
for i in range(5):
turtle.forward(100)
turtle.right(144)
turtle.end_fill()
turtle.hideturtle()
turtle.done()
2、粉色心
import turtle
t = turtle.Turtle()
t.speed(0)
def curvemove():
for i in range(200):
t.right(1)
t.forward(1)
t.color('red','pink')
t.begin_fill()
t.left(140)
t.forward(111.65)
curvemove()
t.left(120)
curvemove()
t.forward(111.65)
t.end_fill()
t.hideturtle()
turtle.done()
3、奥运五环
import turtle # 导入turtle模块
turtle.width(5) # 确定圆圈的宽度
turtle.circle(60) # 确定圆的半径
turtle.penup()
turtle.forward(140)
turtle.pendown()
turtle.color("red") # 确定圆圈的颜色
turtle.circle(60)
turtle.penup()
turtle.forward(140)
turtle.pendown()
turtle.color("yellow")
turtle.circle(60)
turtle.penup()
turtle.goto(210, -50)
turtle.pendown()
turtle.color("blue")
turtle.circle(60)
turtle.penup()
turtle.goto(60, -50)
turtle.pendown()
turtle.color("green")
turtle.circle(60)
turtle.done()
4、时钟1
# coding=utf-8
import turtle
from datetime import *
# 抬起画笔,向前运动一段距离放下
def Skip(step):
turtle.penup()
turtle.forward(step)
turtle.pendown()
def mkHand(name, length):
# 注册Turtle形状,建立表针Turtle
turtle.reset()
Skip(-length * 0.1)
# 开始记录多边形的顶点。当前的乌龟位置是多边形的第一个顶点。
turtle.begin_poly()
turtle.forward(length * 1.1)
# 停止记录多边形的顶点。当前的乌龟位置是多边形的最后一个顶点。将与第一个顶点相连。
turtle.end_poly()
# 返回最后记录的多边形。
handForm = turtle.get_poly()
turtle.register_shape(name, handForm)
def Init():
global secHand, minHand, hurHand, printer
# 重置Turtle指向北
turtle.mode("logo")
# 建立三个表针Turtle并初始化
mkHand("secHand", 135)
mkHand("minHand", 125)
mkHand("hurHand", 90)
secHand = turtle.Turtle()
secHand.shape("secHand")
minHand = turtle.Turtle()
minHand.shape("minHand")
hurHand = turtle.Turtle()
hurHand.shape("hurHand")
for hand in secHand, minHand, hurHand:
hand.shapesize(1, 1, 3)
hand.speed(0)
# 建立输出文字Turtle
printer = turtle.Turtle()
# 隐藏画笔的turtle形状
printer.hideturtle()
printer.penup()
def SetupClock(radius):
# 建立表的外框
turtle.reset()
turtle.pensize(7)
turtle.pencolor("#ff5500")
turtle.fillcolor("green")
for i in range(60):
Skip(radius)
if i % 5 == 0:
turtle.forward(20)
Skip(-radius - 20)
Skip(radius + 20)
if i == 0:
turtle.write(int(12), align="center", font=("Courier", 14, "bold"))
elif i == 30:
Skip(25)
turtle.write(int(i / 5), align="center", font=("Courier", 14, "bold"))
Skip(-25)
elif (i == 25 or i == 35):
Skip(20)
turtle.write(int(i / 5), align="center", font=("Courier", 14, "bold"))
Skip(-20)
else:
turtle.write(int(i / 5), align="center", font=("Courier", 14, "bold"))
Skip(-radius - 20)
else:
turtle.dot(5)
Skip(-radius)
turtle.right(6)
def Week(t):
week = ["星期一", "星期二", "星期三",
"星期四", "星期五", "星期六", "星期日"]
return week[t.weekday()]
def Date(t):
y = t.year
m = t.month
d = t.day
return "%s-%d-%d" % (y, m, d)
def Tick():
# 绘制表针的动态显示
t = datetime.today()
second = t.second + t.microsecond * 0.000001
minute = t.minute + second / 60.0
hour = t.hour + minute / 60.0
secHand.setheading(6 * second)
minHand.setheading(6 * minute)
hurHand.setheading(30 * hour)
turtle.tracer(False)
printer.forward(65)
printer.write(Week(t), align="center",
font=("Courier", 14, "bold"))
printer.back(130)
printer.write(Date(t), align="center",
font=("Courier", 14, "bold"))
printer.home()
turtle.tracer(True)
# 100ms后继续调用tick
turtle.ontimer(Tick, 100)
def main():
# 打开/关闭龟动画,并为更新图纸设置延迟。
turtle.tracer(False)
Init()
SetupClock(160)
turtle.tracer(True)
Tick()
turtle.mainloop()
if __name__ == "__main__":
main()
时钟2
# coding=utf-8
import turtle
from datetime import *
# 抬起画笔,向前运动一段距离放下
def Skip(step):
turtle.penup()
turtle.forward(step)
turtle.pendown()
def mkHand(name, length):
# 注册Turtle形状,建立表针Turtle
turtle.reset()
Skip(-length * 0.1)
# 开始记录多边形的顶点。当前的乌龟位置是多边形的第一个顶点。
turtle.begin_poly()
turtle.forward(length * 1.1)
# 停止记录多边形的顶点。当前的乌龟位置是多边形的最后一个顶点。将与第一个顶点相连。
turtle.end_poly()
# 返回最后记录的多边形。
handForm = turtle.get_poly()
turtle.register_shape(name, handForm)
def Init():
global secHand, minHand, hurHand, printer
# 重置Turtle指向北
turtle.mode("logo")
# 建立三个表针Turtle并初始化
mkHand("secHand", 135)
mkHand("minHand", 125)
mkHand("hurHand", 90)
secHand = turtle.Turtle()
secHand.shape("secHand")
minHand = turtle.Turtle()
minHand.shape("minHand")
hurHand = turtle.Turtle()
hurHand.shape("hurHand")
for hand in secHand, minHand, hurHand:
hand.shapesize(1, 1, 3)
hand.speed(0)
# 建立输出文字Turtle
printer = turtle.Turtle()
# 隐藏画笔的turtle形状
printer.hideturtle()
printer.penup()
def SetupClock(radius):
# 建立表的外框
turtle.reset()
turtle.pensize(7)
turtle.pencolor("#ff5500")
turtle.fillcolor("green")
for i in range(60):
Skip(radius)
if i % 5 == 0:
turtle.forward(20)
Skip(-radius - 20)
Skip(radius + 20)
if i == 0:
turtle.write(int(12), align="center", font=("Courier", 14, "bold"))
elif i == 30:
Skip(25)
turtle.write(int(i / 5), align="center", font=("Courier", 14, "bold"))
Skip(-25)
elif (i == 25 or i == 35):
Skip(20)
turtle.write(int(i / 5), align="center", font=("Courier", 14, "bold"))
Skip(-20)
else:
turtle.write(int(i / 5), align="center", font=("Courier", 14, "bold"))
Skip(-radius - 20)
else:
turtle.dot(5)
Skip(-radius)
turtle.right(6)
def Week(t):
week = ["星期一", "星期二", "星期三",
"星期四", "星期五", "星期六", "星期日"]
return week[t.weekday()]
def Date(t):
y = t.year
m = t.month
d = t.day
return "%s-%d-%d" % (y, m, d)
def Tick():
# 绘制表针的动态显示
t = datetime.today()
second = t.second + t.microsecond * 0.000001
minute = t.minute + second / 60.0
hour = t.hour + minute / 60.0
secHand.setheading(6 * second)
minHand.setheading(6 * minute)
hurHand.setheading(30 * hour)
turtle.tracer(False)
printer.forward(65)
printer.write(Week(t), align="center", font=("Courier", 14, "bold"))
printer.back(130)
printer.write(Date(t), align="center", font=("Courier", 14, "bold"))
printer.home()
turtle.tracer(True)
# 100ms后继续调用tick
turtle.ontimer(Tick, 100)
def main():
# 打开/关闭龟动画,并为更新图纸设置延迟。
turtle.tracer(False)
Init()
SetupClock(160)
turtle.tracer(True)
Tick()
turtle.mainloop()
if __name__ == "__main__":
main()
5、树1
from turtle import *from random import *from math import *def tree(n, l): pd() # 下笔 # 阴影效果 t = cos(radians(heading() + 45)) / 8 + 0.25 pencolor(t, t, t) pensize(n / 3) forward(l) # 画树枝 if n > 0: b = random() * 15 + 10 # 右分支偏转角度 c = random() * 15 + 10 # 左分支偏转角度 d = l * (random() * 0.25 + 0.7) # 下一个分支的长度 # 右转一定角度,画右分支 right(b) tree(n - 1, d) # 左转一定角度,画左分支 left(b + c) tree(n - 1, d) # 转回来 right(c) else: # 画叶子 right(90) n = cos(radians(heading() - 45)) / 4 + 0.5 pencolor(n, n*0.8, n*0.8) circle(3) left(90) # 添加0.3倍的飘落叶子 if(random() > 0.7): pu() # 飘落 t = heading() an = -40 + random()*40 setheading(an) dis = int(800*random()*0.5 + 400*random()*0.3 + 200*random()*0.2) forward(dis) setheading(t) # 画叶子 pd() right(90) n = cos(radians(heading() - 45)) / 4 + 0.5 pencolor(n*0.5+0.5, 0.4+n*0.4, 0.4+n*0.4) circle(2) left(90) pu() #返回 t = heading() setheading(an) backward(dis) setheading(t) pu() backward(l)# 退回bgcolor(0.5, 0.5, 0.5) # 背景色ht() # 隐藏turtlespeed(0) # 速度,1-10渐进,0最快tracer(0, 0)pu() # 抬笔backward(100)left(90) # 左转90度pu() # 抬笔backward(300) # 后退300tree(12, 100) # 递归7层done()
6、树
import turtleimport randomfrom turtle import *from time import sleept = turtle.Turtle()w = turtle.Screen()def tree(branchLen, t): if branchLen > 3: if 8 <= branchLen <= 12: if random.randint(0, 2) == 0: t.color('snow') else: t.color('lightcoral') t.pensize(branchLen / 3) elif branchLen < 8: if random.randint(0, 1) == 0: t.color('snow') else: t.color('lightcoral') t.pensize(branchLen / 2) else: t.color('sienna') t.pensize(branchLen / 10) t.forward(branchLen) a = 1.5 * random.random() t.right(20*a) b = 1.5 * random.random() tree(branchLen-10*b, t) t.left(40*a) tree(branchLen-10*b, t) t.right(20*a) t.up() t.backward(branchLen) t.down()def petal(m, t): # 树下花瓣 for i in range(m): a = 200 - 400 * random.random() b = 10 - 20 * random.random() t.up() t.forward(b) t.left(90) t.forward(a) t.down() t.color("lightcoral") t.circle(1) t.up() t.backward(a) t.right(90) t.backward(b)def main(): t = turtle.Turtle() myWin = turtle.Screen() getscreen().tracer(5, 0) turtle.screensize(bg='wheat') t.left(90) t.up() t.backward(150) t.down() t.color('sienna') tree(60, t) petal(100, t) myWin.exitonclick()main()
7、树
from turtle import *from random import *from math import *def tree(n, l): pd() t = cos(radians(heading() + 45)) / 8 + 0.25 pencolor(t, t, t) pensize(n / 4) forward(l) if n > 0: b = random() * 15 + 10 c = random() * 15 + 10 d = l * (random() * 0.35 + 0.6) right(b) tree(n - 1, d) left(b + c) tree(n - 1, d) right(c) else: right(90) n = cos(radians(heading() - 45)) / 4 + 0.5 pencolor(n, n, n) circle(2) left(90) pu() backward(l)bgcolor(0.5, 0.5, 0.5)ht()speed(0)tracer(0, 0)left(90)pu()backward(300)tree(13, 100)done()