转自 # http://blog.tibarazmi.com/draw-flower-using-turtle
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)
lucy : 梦想照进现实；露茜；青春风采；
draw_flower1.py
# -*- coding: cp936 -*- import turtle import math def p_line(t, n, length, angle): """Draws n line segments.""" for i in range(n): t.fd(length) t.lt(angle) def polygon(t, n, length): """Draws a polygon with n sides.""" angle = 360/n p_line(t, n, length, angle) def arc(t, r, angle): """Draws an arc with the given radius and angle.""" arc_length = 2 * math.pi * r * abs(angle) / 360 n = int(arc_length / 4) + 1 step_length = arc_length / n step_angle = float(angle) / n # Before starting reduces, making a slight left turn. t.lt(step_angle/2) p_line(t, n, step_length, step_angle) t.rt(step_angle/2) def petal(t, r, angle): """Draws a 花瓣 using two arcs.""" for i in range(2): arc(t, r, angle) t.lt(180-angle) def flower(t, n, r, angle, p): """Draws a flower with n petals.""" for i in range(n): petal(t, r, angle) t.lt(p/n) def leaf(t, r, angle, p): """Draws a 叶子 and fill it.""" t.begin_fill() # Begin the fill process. t.down() flower(t, 1, r, angle, p) t.end_fill() def main(): window= turtle.Screen() #creat a screen window.bgcolor("white") window.title("draw a flower") lucy= turtle.Turtle() lucy.shape("turtle") lucy.color("red") lucy.width(3) #lucy.speed(10) # Drawing flower flower(lucy, 7, 60, 100, 360) # Drawing pedicel lucy.color("brown") lucy.rt(90) lucy.fd(200) # Drawing leaf 1 lucy.width(1) lucy.rt(270) lucy.color("green") leaf(lucy, 40, 80, 180) lucy.rt(140) lucy.color("black") lucy.fd(30) lucy.lt(180) lucy.fd(30) # Drawing leaf 2 lucy.rt(120) lucy.color("green") leaf(lucy, 40, 80, 180) lucy.color("black") lucy.rt(140) lucy.fd(30) lucy.ht() # hideturtle window.exitonclick() main()
