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Simple 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
  penUp(turtle)
  moveTo(turtle, int(width/3), int(height/2))
  penDown(turtle)

  # Now, draw the circle
  for degree in range(0, 360):
    turn(turtle, 1) # Turn one degree at a time
    forward(turtle, 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