symbian-qemu-0.9.1-12/python-2.6.1/Demo/turtle/tdemo_wikipedia.py
author mikek
Mon, 17 May 2010 18:37:02 +0100
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permissions -rw-r--r--
Build was broken by a type in gui_common.h
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"""      turtle-example-suite:
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          tdemo_wikipedia3.py
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This example is
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inspired by the Wikipedia article on turtle
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graphics. (See example wikipedia1 for URLs)
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First we create (ne-1) (i.e. 35 in this
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example) copies of our first turtle p.
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Then we let them perform their steps in
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parallel.
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Followed by a complete undo().
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"""
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from turtle import Screen, Turtle, mainloop
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from time import clock, sleep
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def mn_eck(p, ne,sz):
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    turtlelist = [p]
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    #create ne-1 additional turtles
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    for i in range(1,ne):
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        q = p.clone()
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        q.rt(360.0/ne)
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        turtlelist.append(q)
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        p = q
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    for i in range(ne):
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        c = abs(ne/2.0-i)/(ne*.7)
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        # let those ne turtles make a step
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        # in parallel:
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        for t in turtlelist:
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            t.rt(360./ne)
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            t.pencolor(1-c,0,c)
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            t.fd(sz)
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def main():
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    s = Screen()
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    s.bgcolor("black")
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    p=Turtle()
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    p.speed(0)
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    p.hideturtle()
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    p.pencolor("red")
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    p.pensize(3)
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    s.tracer(36,0)
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    at = clock()
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    mn_eck(p, 36, 19)
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    et = clock()
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    z1 = et-at
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    sleep(1)
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    at = clock()
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    while any([t.undobufferentries() for t in s.turtles()]):
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        for t in s.turtles():
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            t.undo()
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    et = clock()
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    return "Laufzeit: %.3f sec" % (z1+et-at)
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if __name__ == '__main__':
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    msg = main()
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    print msg
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    mainloop()