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from wrappers import CurvesTurtle
class SimpleTurtle(CurvesTurtle):
def square1(self, distance):
self.polygon(4, distance)
# just to be different, turn right instead of left
def square2(self, distance):
for i in range(4):
self.forward(distance)
self.right(90)
def polygon(self, sides, distance):
angle = 360.0 / sides
for i in range(sides):
self.forward(distance)
self.left(angle)
def draw(canvas):
t = SimpleTurtle(canvas)
t.color('blue')
t.rDragon(3, 12)
t.color('orange')
t.cCurve(5, 10)
t.color('black')
t.square2(30)
t.square1(100)
t.polygon(6, 30)
#print t._invradian
#print t.angle
# I would like to be able to call routines like square2 and polygon1
# without having refer to the object if something like below
# is possible?
#def polygon(sides, distance): tc.polygon1(sides, distance)
#polygon(3, 60)
# I got this from chapter 4 of Learning Python, it seems to work
# functions are just objects
# so we create local objects that point to the methods of the object
# this only works for the object, not the class in general, so a
# different solution might be more appropriate
square = t.square1
polygon = t.polygon
t.color('green')
# test to see if we get a green square
square(150)
# this also shows some kind of truncation or rounding error
# the top corners of the triangle are off by one pixel
t.color('black')
t.pu()
t.home()
t.lt(180)
t.fd(200)
t.rt(180)
t.pd()
t.color('blue')
for i in range(5):
polygon(5, 40)
#t.polygon(5, 40)
t.left(360.0 / 5)
t2 = SimpleTurtle(canvas)
t2.color('red')
t2.polygon(16, 10)
t.color('blue')
#t.forward(200)
polygon(8, 80)
# if this works correctly
# the arcs will be different colors
# so _goto has to be changed to set the pen characteristics
# before drawing
for i in range(18):
#t.color('blue')
t.forward(50)
t.right(30)
#t2.color('red')
t2.fd(50)
t2.rt(30)
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