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| """ turtle-example-suite:
|
| tdemo_wikipedia3.py
|
| This example is
| inspired by the Wikipedia article on turtle
| graphics. (See example wikipedia1 for URLs)
|
| First we create (ne-1) (i.e. 35 in this
| example) copies of our first turtle p.
| Then we let them perform their steps in
| parallel.
|
| Followed by a complete undo().
| """
| from turtle import Screen, Turtle, mainloop
| from time import clock, sleep
|
| def mn_eck(p, ne,sz):
| turtlelist = [p]
| #create ne-1 additional turtles
| for i in range(1,ne):
| q = p.clone()
| q.rt(360.0/ne)
| turtlelist.append(q)
| p = q
| for i in range(ne):
| c = abs(ne/2.0-i)/(ne*.7)
| # let those ne turtles make a step
| # in parallel:
| for t in turtlelist:
| t.rt(360./ne)
| t.pencolor(1-c,0,c)
| t.fd(sz)
|
| def main():
| s = Screen()
| s.bgcolor("black")
| p=Turtle()
| p.speed(0)
| p.hideturtle()
| p.pencolor("red")
| p.pensize(3)
|
| s.tracer(36,0)
|
| at = clock()
| mn_eck(p, 36, 19)
| et = clock()
| z1 = et-at
|
| sleep(1)
|
| at = clock()
| while any([t.undobufferentries() for t in s.turtles()]):
| for t in s.turtles():
| t.undo()
| et = clock()
| return "Laufzeit: %.3f sec" % (z1+et-at)
|
|
| if __name__ == '__main__':
| msg = main()
| print msg
| mainloop()
|
|
