CSC111 Dot Notation and Objects

--D. Thiebaut 09:11, 13 October 2011 (EDT)

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Exercise 1

For the 2 questions below, use as many variables as you need.

• Draw the wheel of a Taxi cab at a center point of coordinates ( 100, 100 ). The hubcap is 30 pixels wide, the tire 50.
• Draw the second wheel of the Taxi cab with a center point horizontally 300 pixels away from the center, to the right.

Exercise 2

Same two questions as in Exercise 1, but you can only use 5 variables: P1, the original point (100, 100), h1, w1, the first hubcap and wheel, and h2, w2, for the second wheel.

Solutions

from graphics import *


def main():
    win = GraphWin( "DotNotation", 600, 400 )

    P1 = Point( 100, 100 )

    # Wheel 1
    h1 = Circle( P1, 30 )
    h1.setFill( "grey" )
    w1 = Circle( P1, 50 )
    w1.setFill( "black" )
    w1.draw( win )
    h1.draw( win )

    # Wheel 2
    h2 = Circle( Point( P1.getX()+300, P1.getY() ), h1.getRadius() )
    h2.setFill( "grey" )
    w2 = Circle( Point( h2.getCenter().getX(), h2.getCenter().getY() ),
                 w1.getRadius() )
    w2.setFill( "black" )
    w2.draw( win )
    h2.draw( win )

    # wait for click
    #win.getMouse()
    win.close()

main()