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Object-oriented turtle graphics

import time

# Draw a "circle". Turtle graphics are optimized, so the circle that is
# drawn is really a polygon. However you can see the turtle change its
# heading one degree at a time.
def circle():
  width = 640
  height = 480
  world = makeWorld(width, height) # Make a "canvas" for the turtle to draw on
  turtle = makeTurtle(world) # Create a turtle in the world.

  # Put the turtle somewhere in the middle of the world before drawing
  turtle.penUp()
  turtle.moveTo(int(width/3), int(height/2))
  turtle.penDown()

  # Now, draw the circle
  for degree in range(0, 360):
    turtle.turn(1) # Turn one degree at a time
    turtle.forward(2) # A small circle. One pixel is too small.
    time.sleep(0.05) # So that we can see the turtle doing the drawing

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