Home | History | Annotate | Download | only in turtle 
      1 """      turtle-example-suite:
      2 
      3           tdemo_wikipedia3.py
      4 
      5 This example is
      6 inspired by the Wikipedia article on turtle
      7 graphics. (See example wikipedia1 for URLs)
      8 
      9 First we create (ne-1) (i.e. 35 in this
     10 example) copies of our first turtle p.
     11 Then we let them perform their steps in
     12 parallel.
     13 
     14 Followed by a complete undo().
     15 """
     16 from turtle import Screen, Turtle, mainloop
     17 from time import clock, sleep
     18 
     19 def mn_eck(p, ne,sz):
     20     turtlelist = [p]
     21     #create ne-1 additional turtles
     22     for i in range(1,ne):
     23         q = p.clone()
     24         q.rt(360.0/ne)
     25         turtlelist.append(q)
     26         p = q
     27     for i in range(ne):
     28         c = abs(ne/2.0-i)/(ne*.7)
     29         # let those ne turtles make a step
     30         # in parallel:
     31         for t in turtlelist:
     32             t.rt(360./ne)
     33             t.pencolor(1-c,0,c)
     34             t.fd(sz)
     35 
     36 def main():
     37     s = Screen()
     38     s.bgcolor("black")
     39     p=Turtle()
     40     p.speed(0)
     41     p.hideturtle()
     42     p.pencolor("red")
     43     p.pensize(3)
     44 
     45     s.tracer(36,0)
     46 
     47     at = clock()
     48     mn_eck(p, 36, 19)
     49     et = clock()
     50     z1 = et-at
     51 
     52     sleep(1)
     53 
     54     at = clock()
     55     while any([t.undobufferentries() for t in s.turtles()]):
     56         for t in s.turtles():
     57             t.undo()
     58     et = clock()
     59     return "Laufzeit: %.3f sec" % (z1+et-at)
     60 
     61 
     62 if __name__ == '__main__':
     63     msg = main()
     64     print msg
     65     mainloop()
     66