#!/usr/bin/env python
import builtins
import turtle as t
import math
import _lib
builtins.position = (-300, 0)
def koch_curve(iteration, size, angle=60, direction=1):
if iteration == 0:
t.forward(size)
else:
size = size / (2 + 2 * math.cos(math.radians(angle)))
koch_curve(iteration - 1, size, angle, direction)
t.left(angle * direction)
koch_curve(iteration - 1, size, angle, direction)
t.right(2 * angle * direction)
koch_curve(iteration - 1, size, angle, direction)
t.left(angle * direction)
koch_curve(iteration - 1, size, angle, direction)
if __name__ == "__main__":
_lib.init()
koch_curve(iteration, size)
_lib.exit()
#!/usr/bin/env python
import builtins
import turtle as t
import _lib
builtins.position = (-300, -240)
def arrowhead_curve(iteration, size, direction=1):
if iteration == 0:
t.forward(size)
else:
t.left(60 * direction)
arrowhead_curve(iteration-1, size/2, -direction)
t.right(60 * direction)
arrowhead_curve(iteration-1, size/2, direction)
t.right(60 * direction)
arrowhead_curve(iteration-1, size/2, -direction)
t.left(60 * direction)
if __name__ == "__main__":
_lib.init()
arrowhead_curve(iteration, size)
_lib.exit()