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# examples derived from
# Turtle Geometry: The Computer as a Medium for Exploring Mathematics
# by Harold Abelson and Andrea diSessa
from wrappers import Turtle
class SunTurtle(Turtle):
# p. 10
def arcr(self, r, deg):
for i in range(deg):
self.forward(r)
self.right(1)
# p. 11
def arcl(self, r, deg):
for i in range(deg):
self.forward(r)
self.left(1)
# p. 12
def ray(self, r):
for i in range(2):
self.arcr(r, 90)
self.arcl(r, 90)
"""
self.arcl(r, 90)
self.arcr(r, 90)
self.arcl(r, 90)
self.arcr(r, 90)
"""
# p. 12
def circles(self):
for i in range(9):
self.arcr(1, 360)
self.right(40)
# p. 12
def petal(self, size):
self.arcr(size, 60)
self.right(120)
self.arcr(size, 60)
self.right(120)
# p. 12
def flower(self, size):
for i in range(6):
self.petal(size)
self.right(60)
# p. 12
def sun(self, size):
for i in range(9):
self.ray(size)
self.rt(160)
def draw(canvas):
t = SunTurtle(canvas)
t.cls()
#t.circles()
#t.flower(3)
# simplify coding below by mapping the object methods
pu = t.pu
pd = t.pd
rt = t.rt
lt = t.lt
fd = t.fd
bk = t.bk
sun = t.sun
pu()
lt(90)
fd(225)
rt(90)
bk(100)
pd()
t.color('gold')
sun(1.5)
t.moveTo(10, 10)
t.write("Good Morning!")
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