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31 changes: 22 additions & 9 deletions Lib/turtledemo/penrose.py
Original file line number Diff line number Diff line change
Expand Up @@ -22,6 +22,7 @@
f = (5**0.5-1)/2.0 # (sqrt(5)-1)/2 -- golden ratio
d = 2 * cos(3*pi/10)


def kite(l):
fl = f * l
lt(36)
Expand All @@ -34,6 +35,7 @@ def kite(l):
fd(l)
rt(144)


def dart(l):
fl = f * l
lt(36)
Expand All @@ -46,11 +48,12 @@ def dart(l):
fd(l)
rt(144)


def inflatekite(l, n):
if n == 0:
px, py = pos()
h, x, y = int(heading()), round(px,3), round(py,3)
tiledict[(h,x,y)] = True
h, x, y = int(heading()), round(px, 3), round(py, 3)
tiledict[(h, x, y)] = True
return
fl = f * l
lt(36)
Expand All @@ -68,11 +71,12 @@ def inflatekite(l, n):
inflatedart(fl, n-1)
lt(36)


def inflatedart(l, n):
if n == 0:
px, py = pos()
h, x, y = int(heading()), round(px,3), round(py,3)
tiledict[(h,x,y)] = False
h, x, y = int(heading()), round(px, 3), round(py, 3)
tiledict[(h, x, y)] = False
return
fl = f * l
inflatekite(fl, n-1)
Expand All @@ -87,6 +91,7 @@ def inflatedart(l, n):
fd(l)
rt(144)


def draw(l, n, th=2):
clear()
l = l * f**n
Expand All @@ -103,16 +108,19 @@ def draw(l, n, th=2):
color("black", (0.75, 0, 0))
stamp()


def sun(l, n):
for i in range(5):
inflatekite(l, n)
lt(72)

def star(l,n):

def star(l, n):
for i in range(5):
inflatedart(l, n)
lt(72)


def makeshapes():
tracer(0)
begin_poly()
Expand All @@ -125,14 +133,16 @@ def makeshapes():
register_shape("dart", get_poly())
tracer(1)


def start():
reset()
ht()
pu()
makeshapes()
resizemode("user")

def test(l=200, n=4, fun=sun, startpos=(0,0), th=2):

def test(l=200, n=4, fun=sun, startpos=(0, 0), th=2):
global tiledict
goto(startpos)
setheading(0)
Expand All @@ -148,6 +158,7 @@ def test(l=200, n=4, fun=sun, startpos=(0,0), th=2):
nd = len([x for x in tiledict if not tiledict[x]])
print("%d kites and %d darts = %d pieces." % (nk, nd, nk+nd))


def demo(fun=sun):
start()
for i in range(8):
Expand All @@ -158,21 +169,23 @@ def demo(fun=sun):
if t < 2:
sleep(2 - t)


def main():
#title("Penrose-tiling with kites and darts.")
# title("Penrose-tiling with kites and darts.")
mode("logo")
bgcolor(0.3, 0.3, 0)
demo(sun)
sleep(2)
demo(star)
pencolor("black")
goto(0,-200)
pencolor(0.7,0.7,1)
goto(0, -200)
pencolor(0.7, 0.7, 1)
write("Please wait...",
align="center", font=('Arial Black', 36, 'bold'))
test(600, 8, startpos=(70, 117))
return "Done"


if __name__ == "__main__":
msg = main()
mainloop()