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Poly function

import time

# Draw a repeating geometrical figure with specified side length and
# turning through specified angle.
#
# Rewritten for JES from a LOGO program in Abelson and DiSessa's
# "Turtle Geometry" (1980, p. 15)
#
# Note that this program is deliberately written with an infinite loop.
# It will run for ever, so you have to stop it by pressing the stop button.
#
# Experiment by varying the value of angle. (Changing side will scale
# the shape and stop it from distorting if the turtle runs up against
# the edge of the world. Changing the angle will affect the shape.)

def poly(side, angle):
  world = makeWorld(640, 480)
  turtle = makeTurtle(world)
  while 1: #In other words, repeat FOREVER!!
    forward(turtle, side)
    turn(turtle, angle)
    forward(turtle, side)
    turn(turtle, 2*angle)
    time.sleep(0.5) # Delay half a second so we can watch it draw

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• Spring 2007 materials last edited on 21 August 2007 at 10:44 pm by user-1121vkp.dsl.mindspring.com