def run(self, turtle: Turtle, depth: int, step: float, angle: float = 90, thickness='constant'):
s = self.generate_string(depth)
stack = []
for i in s:
if i == '[':
stack.append((turtle.position, turtle.angle))
elif i == ']':
turtle.position, turtle.angle = stack.pop()
elif i == '+':
turtle.right(angle)
elif i == '-':
turtle.left(angle)
elif i == '|':
turtle.left(180)
elif i.islower():
turtle.forward(step, usepen=False)
elif i.isupper():
if thickness == 'constant':
thicknessVal = 1
elif thickness == 'sq':
thicknessVal = 1.5 / (len(stack) + 1) ** 0.5
else:
raise ValueError()
turtle.forward(step, usepen=True, thickness=thicknessVal)
else:
raise ValueError("Incorrect action")
def kochline(self, turtle: Turtle, depth, size):
if depth == 1:
turtle.forward(size * 3**depth)
return
self.kochline(turtle, depth - 1, size)
turtle.left(60)
self.kochline(turtle, depth - 1, size)
turtle.right(120)
self.kochline(turtle, depth - 1, size)
turtle.left(60)
self.kochline(turtle, depth - 1, size)
def run(self, fnprovider: AbstractFilenameProvider):
fn = fnprovider.get_filename(suffix='.svg', name="shapes")
turtle = Turtle(fn, (50, 50))
polygon(turtle, 5, 50)
turtle.penup()
turtle.forward(100)
turtle.pendown()
star(turtle, 5, 50)
turtle.penup()
turtle.forward(100)
turtle.pendown()
star(turtle, 7, 50)
turtle.save(frame=(280, 100))
return fn
def cantor(fn, length=300):
turtle = Turtle(fn, (20, 10))
lsystem = LSystem(
{
'F': lambda: turtle.forward(length),
'f': lambda: turtle.forward(length, usepen=False)
}, {
'F': 'FfF',
'f': 'fff'
}, 'F')
for i in range(7):
turtle.resetpos((0, i * 20))
lsystem.run(i)
length /= 3
turtle.save(fn, (350, 100))
def crystal(fn):
turtle = Turtle(fn, (2, 2))
lsystem = LSystem(
{
'F': lambda: turtle.forward(2),
'+': lambda: turtle.right(90)
}, {'F': 'FF+F++F+F'}, 'F+F+F+F')
lsystem.run(5)
turtle.save(fn, (490, 490))
def triangle(fn):
angle = 120
length = 10
turtle = Turtle(fn, (80, 250))
lsystem = LSystem(
{
'F': lambda: turtle.forward(length),
'f': lambda: turtle.forward(length, usepen=False),
'+': lambda: turtle.right(angle),
'-': lambda: turtle.left(angle)
}, {'F': 'F-F+F'}, 'F+F+F')
lsystem.run(0)
turtle.resetpos((50, 0))
lsystem.run(1)
turtle.resetpos((100, 0))
lsystem.run(2)
turtle.resetpos((160, 0))
lsystem.run(3)
turtle.resetpos((280, 0))
lsystem.run(4)
turtle.resetpos((400, 0))
lsystem.run(5)
turtle.save(frame=(500, 150))
def square_sierpinsky(fn):
angle = 90
length = 3
turtle = Turtle(fn, (10, 100))
turtle.left(90)
lsystem = LSystem(
{
'F': lambda: turtle.forward(length),
'X': lambda: None,
'+': lambda: turtle.right(angle),
'-': lambda: turtle.left(angle)
}, {
'F': 'F',
'X': 'XF-F+F-XF+F+XF-F+F-X'
}, 'F+XF+F+XF')
lsystem.run(4)
turtle.save(fn, (200, 100))
def pentagon(self, turtle: Turtle, depth, size):
outerangle = 360 / 5
innerangle = 180 - outerangle
if depth == 0:
for _ in range(5):
turtle.forward(size)
turtle.right(outerangle)
return
for _ in range(5):
self.pentagon(turtle, depth - 1, size)
turtle.forward(self.pentsize(depth) * size, usepen=False)
turtle.right(outerangle)
prevsize = self.pentsize(depth - 1) * size
turtle.forward(prevsize, usepen=False)
turtle.right(outerangle)
turtle.forward(prevsize, usepen=False)
turtle.right(outerangle - innerangle)
self.pentagon(turtle, depth - 1, size)
turtle.left(outerangle - innerangle)
turtle.back(prevsize, usepen=False)
turtle.left(outerangle)
turtle.back(prevsize, usepen=False)
def flower(self, turtle: Turtle):
for _ in range(12):
for _ in range(12):
turtle.forward(20)
turtle.right(360 / 12)
turtle.right(360 / 12)
def star(turtle: Turtle, n: int, size: float):
angle = 180 - 2 * (90 - 360 / n)
for _ in range(n):
turtle.forward(size)
turtle.right(angle)
def polygon(turtle: Turtle, n: int, size: float):
angle = 360 / n
for _ in range(n):
turtle.forward(size)
turtle.right(angle)
def hilbert(self, turtle: Turtle, depth, size):
turtle.right(90)
if depth == 0:
turtle.forward(size * 3)
turtle.left(90)
turtle.forward(size * 3)
turtle.left(90)
turtle.forward(size * 3)
turtle.right(90)
else:
innersize = self.hs(depth - 1) * size * 3
turtle.forward(innersize, usepen=False)
turtle.right(180)
self.hilbert(turtle, depth - 1, size)
turtle.right(180)
turtle.forward(innersize, usepen=False)
turtle.forward(size * 3)
turtle.left(90)
self.hilbert(turtle, depth - 1, size)
turtle.forward(size * 3)
self.hilbert(turtle, depth - 1, size)
turtle.left(90)
turtle.forward(size * 3)
turtle.forward(innersize, usepen=False)
turtle.right(180)
self.hilbert(turtle, depth - 1, size)
turtle.right(180)
turtle.forward(innersize, usepen=False)
turtle.right(90)