操縱海龜繪圖有著許多的命令,這些命令可以劃分為兩種:壹種為運動命令，壹種為畫筆控制命令
1. 運動命令:
forward(degree) ?#向前移動距離degree代表距離
backward(degree) #向後移動距離degree代表距離
right(degree) #向右移動多少度
left(degree) ?#向左移動多少度
goto(x,y) ? #將畫筆移動到坐標為x,y的位置
stamp() ? #復制當前圖形
speed(speed) #畫筆繪制的速度範圍[0,10]整數
2. 畫筆控制命令:
down() #移動時繪制圖形,缺省時也為繪制
up() ?#移動時不繪制圖形
pensize(width) #繪制圖形時的寬度
color(colorstring) #繪制圖形時的顏色
fillcolor(colorstring) #繪制圖形的填充顏色
fill(Ture)
fill(false)
lucy : 夢想照進現實；露茜；青春風采；
draw_flower1.py
[python]?view plain?copy
#?-*-?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?葉子?and?fill?it."""?
t.begin_fill()?#?Begin?the?fill?process.?
t.down()?
flower(t,?1,?40,?80,?180)?
t.end_fill()?
def?main():?
window=turtle.Screen()?#creat?a?screen?
window.bgcolor("blue")?
lucy=turtle.Turtle()?
lucy.shape("turtle")?
lucy.color("red")?
lucy.width(5)?
lucy.speed(0)?
#?Drawing?flower?
flower(lucy,?7,?60,?100,?360)?
#?Drawing?pedicel?
lucy.color("brown")?
lucy.rt(90)?
lucy.fd(200)?
#?Drawing?leaf?
lucy.rt(270)?
lucy.color("green")?
leaf(lucy,?40,?80,?180)?
lucy.ht()?
window.exitonclick()?
main() ?