| """ 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 tkinter.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() |