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Name	Size	Permission
__init__.py	314 B	-rw-r--r--
__main__.py	14.93 KB	-rwxr-xr-x
bytedesign.py	4.15 KB	-rwxr-xr-x
chaos.py	951 B	-rw-r--r--
clock.py	3.11 KB	-rwxr-xr-x
colormixer.py	1.31 KB	-rw-r--r--
forest.py	2.9 KB	-rwxr-xr-x
fractalcurves.py	3.39 KB	-rwxr-xr-x
lindenmayer.py	2.38 KB	-rwxr-xr-x
minimal_hanoi.py	2 KB	-rwxr-xr-x
nim.py	6.36 KB	-rw-r--r--
paint.py	1.26 KB	-rwxr-xr-x
peace.py	1.04 KB	-rwxr-xr-x
penrose.py	3.3 KB	-rwxr-xr-x
planet_and_moon.py	2.76 KB	-rwxr-xr-x
rosette.py	1.33 KB	-rw-r--r--
round_dance.py	1.76 KB	-rw-r--r--
sorting_animate.py	4.93 KB	-rwxr-xr-x
tree.py	1.37 KB	-rwxr-xr-x
turtle.cfg	160 B	-rw-r--r--
two_canvases.py	1.09 KB	-rw-r--r--
yinyang.py	821 B	-rwxr-xr-x

Code Editor : round_dance.py

"""      turtle-example-suite:

tdemo_round_dance.py

(Needs version 1.1 of the turtle module that
comes with Python 3.1)

Dancing turtles have a compound shape
consisting of a series of triangles of
decreasing size.

Turtles march along a circle while rotating
pairwise in opposite direction, with one
exception. Does that breaking of symmetry
enhance the attractiveness of the example?

Press any key to stop the animation.

Technically: demonstrates use of compound
shapes, transformation of shapes as well as
cloning turtles. The animation is
controlled through update().
"""

from turtle import *

def stop():
    global running
    running = False

def main():
    global running
    clearscreen()
    bgcolor("gray10")
    tracer(False)
    shape("triangle")
    f =   0.793402
    phi = 9.064678
    s = 5
    c = 1
    # create compound shape
    sh = Shape("compound")
    for i in range(10):
        shapesize(s)
        p =get_shapepoly()
        s *= f
        c *= f
        tilt(-phi)
        sh.addcomponent(p, (c, 0.25, 1-c), "black")
    register_shape("multitri", sh)
    # create dancers
    shapesize(1)
    shape("multitri")
    pu()
    setpos(0, -200)
    dancers = []
    for i in range(180):
        fd(7)
        tilt(-4)
        lt(2)
        update()
        if i % 12 == 0:
            dancers.append(clone())
    home()
    # dance
    running = True
    onkeypress(stop)
    listen()
    cs = 1
    while running:
        ta = -4
        for dancer in dancers:
            dancer.fd(7)
            dancer.lt(2)
            dancer.tilt(ta)
            ta = -4 if ta > 0 else 2
        if cs < 180:
            right(4)
            shapesize(cs)
            cs *= 1.005
        update()
    return "DONE!"

if __name__=='__main__':
    print(main())
    mainloop()

${this.title}

Code Editor : round_dance.py