D. Thiebaut (talk) 17:12, 8 April 2018 (EDT)

This assignment is due 04/19/18, at 11:55 p.m. You will need to submit your code as well as a copy of the graphic window to Moodle. Programs that use graphics cannot be automatically tested on Moodle, so your program will be graded by hand by inspecting the image and code submitted. Make sure you document your code well!

Problem 1

You have been hired for the summer by a company that makes wrapping paper. The company has a Web form where customers can pick different colors, a general theme, and a message to print in the middle of the page. Then a Python program generates an image that is printed by a large format printer.

The image above shows one particular output, for somebody who has selected Cars as the theme, Blue as the background, and "CSC111 HOMEWORK 9" as the message.

Your assignment

You must demonstrate that you should be hired for the programming job by writing a program that generates a sample output, with a predefined color, a predefined scheme, and a predefined message. Your program will NOT ask the user for any information, but instead will generate the information internally, on its own.

Submission

You must submit 2 files on Moodle:

Your program, which should be called hw9_1.py
An image of the output generated by your program. It should be called hw9_1.png or hw9_1.jpg, depending on how you capture the image. You can find information on the Web on ways to capture a window on your desktop to an image. Here are just a couple links that should be useful:

Requirements

Your program must define classes (as many as you feel you need) for the different cars.
Your program should print the cars using two for-loops, one nested in the other. Programs that create the cars using code not repeated by loops will be given a C at most. Your window should have at least 6 cars per row, and at least 6 rows of cars.
The cars are not moving. They are generated at a particular location, and do not move. Your program does not need an animation loop.
The color of the cars should be randomly generated.
Your program organizes the cars in rows, one above the other. The car may or may not align vertically (the image above shows them aligned vertically).
You are free to design the shape of your car. It must contain at least 2 rectangles (or other shapes) and at least two wheels.
A given car can have differently colored shapes, or the same color for all its shapes. It is your design decision.
Cars are not allowed to extend past the boundaries of the window.
The message in the middle should appear inside a rectangle that hides the cars underneath it. It is fine to have cars partially covered by the box containing the message the message.
The message should be centered in the rectangle.
Adjust the font size so that the message is large enough to be easily readable.
The screen capture of the image should show the sides and top of the window that contains the image, so that it can be easily verified that the cars are not cut at the edges of the window.
The actual text of the message should be your name, consisting of your first name, and your last name. This way, the images can be easily assigned to you and accordingly graded.
Your program should have a main() function defined at the end, and one final call to main() at the end of the program.

Hints

The document Graphic Module Reference, authored by Zelle, provides all the information you need for figuring out:

How to set the background of the window
How to set the size, or face (family), of the font used to display the message.

Do not hesitate to give your classes additional methods that can make your life easier in your main program.
The colors available can be found on this page.

Submission

Remember that you must submit 2 files, the program and a screen capture of your window. Go to the Moodle page for the submission links.

Problem 2

This second problem is similar to Problem 1, but this time you are required to use two different types of cars. They should be different enough to be easily distinguishable from one another.

The program must generate rows of cars, alternating between the two types of car. The first row should have cars of Type 1, the second row cars of Type 2, and will continue alternating between the two.

Your program should define one class for the first type of car, and another class for the second type.

The program must use for-loops that are nested, one inside the other, to display the rows of cars.

You need to submit two files on Moodle, a python program called hw9_2.py and a screen copy of your image, called hw9_2.jpg or hw9_2.png (all lower-case), depending on how you captured your window.

The image above shows the caption displayed on two lines. For your program, make it display your name, on one line, as for Problem 1.

Fancy Cars

Do not hesitate to explore the graphics library and generate more sophisticated cars!

</showafterdate>

Solution Programs

Part 1

# wheel1.py
# D. Thiebaut
# a skeleton program to get started with the graphics
# 
from graphics import *
import random
import tkcolors

# define geometry (constants)
WIDTH  = 700
HEIGHT = 600


class Wheel:
    """a Wheel is 2 concentric circles, the larger one black,
    the smaller one grey."""
    
    def __init__(self, centr, rad1, rad2 ):
        # make circ1 the smaller of the 2 circles
        self.circ1   = Circle( centr, min( rad1, rad2 ) )
        self.circ2   = Circle( centr, max( rad1, rad2 ) )
        self.circ1.setFill( "grey" )
        self.circ2.setFill( "black" )
        
    def draw( self, win ):
        self.circ2.draw( win )
        self.circ1.draw( win )

    def move( self, dx, dy ):
        self.circ1.move( dx, dy )
        self.circ2.move( dx, dy )
        
class Car:
    """a class containing a rectangle and 2 wheels, forming
    a simple car"""

    def __init__( self, refPoint ):
        # create rectangle
        self.width  = 60
        self.height = 20
        self.radius = 10
        
        P1  = refPoint
        xP1 = P1.getX()
        yP1 = P1.getY()
        xP2 = xP1 + self.width
        yP2 = yP1 + self.height
        P2  = Point( xP2, yP2 )
        self.body = Rectangle( P1, P2 )
        self.body.setFill( random.choice( tkcolors.colors ) )

        P3  = Point( xP1+self.width//4, yP1 )
        P4  = Point( xP1+self.width*3//4, yP1-self.height//2 )
        self.top = Rectangle( P3, P4 )
        self.top.setFill( random.choice( tkcolors.colors ) )
        
        # create the Wheels
        self.w1 = Wheel( Point( xP1+self.width//4, yP1+self.height ), self.radius//2, self.radius )
        self.w2 = Wheel( Point( xP1++self.width*3//4, yP1+self.height ), self.radius//2, self.radius )

        # set the initial speed
        self.dx = 1
        self.dy = 0

    def setSpeed( self, deltaX, deltaY ):
        self.dx = deltaX
        self.dy = deltaY
        
    def draw( self, win ):
        self.w1.draw( win )
        self.body.draw( win )
        self.w2.draw( win )
        self.top.draw( win )

    def autoMove( self ):
        self.w1.move( self.dx, self.dy )
        self.w2.move( self.dx, self.dy )
        self.body.move( self.dx, self.dy )

    def reverseDirection( self ):
        self.dx = -self.dx

    def getX( self ):
        return self.body.getP1().getX()
        
#----------------------------------------------------------------
def waitForClick( win, message ):
    """ waitForClick: stops the GUI and displays a message.  
    Returns when the user clicks the window. The message is erased."""

    # wait for user to click mouse to start
    startMsg = Text( Point( win.getWidth()/2, win.getHeight()/2 ), message )
    startMsg.draw( win )    # display message
    win.getMouse()          # wait
    startMsg.undraw()       # erase

def main():
    global W, H
    win = GraphWin( "Wrapping Paper", WIDTH, HEIGHT )
    win.setBackground( "lightblue" )
    
    #waitForClick( win, "click to start" )

    cars = []
    for x in range( 10, WIDTH, 78 ):
        for y in range( 20, HEIGHT, 50 ):
            car1 = Car( Point( x, y ) )
            car1.draw( win )
            cars.append( car1 )        

    Banner = Rectangle( Point( WIDTH//2-200, HEIGHT//2-40 ),
                        Point( WIDTH//2+200, HEIGHT//2+40 ) )
    Banner.setFill( "white" )
    Banner.draw( win )

    BannerText = Text( Point( WIDTH//2, HEIGHT//2 ),
                        "CSC111 HOMEWORK 10" )
    BannerText.setSize( 30 )
    BannerText.draw( win )
    
    waitForClick( win, "" )
    win.close()
    
main()

Part 2

# homework 10
# D. Thiebaut
from graphics import GraphicsWindow
from random import seed
from random import randrange

MAXWIDTH = 800
MAXHEIGHT = 600


class Circle2:
    def __init__( self, x, y, diameter, color ):
        self._x       = x 
        self._y       = y 
        self._diameter= diameter
        self._color  = color   # list of 3 ints between 0 and 255

    def draw( self, canvas ):
        xAnchor = self._x-self._diameter//2
        yAnchor = self._y-self._diameter//2
        canvas.setFill( self._color[0], self._color[1], self._color[2] )            
        canvas.drawOval( xAnchor,
                         yAnchor,
                         self._diameter,
                         self._diameter )

class Wheel:
    def __init__( self, x, y, diameter ):
        self._c1 = Circle2( x, y, diameter, ( 0,0,0 ) )
        self._c2 = Circle2( x, y, diameter/2, ( 200, 200, 200 ) )

    def draw( self, canvas ):
        self._c1.draw( canvas )
        self._c2.draw( canvas )

class Rectangle:
    def __init__( self, x, y, width, height, color ):
        self._x      = x
        self._y      = y
        self._width  = width
        self._height = height
        self._color  = color   # list of 3 ints between 0 and 255

    def setRandomColor( self ):
        r = randrange( 256 )
        g = randrange( 256 )
        b = randrange( 256 )
        self._color = (r, g, b )

    def draw( self, canvas ):
        canvas.setFill( self._color[0], self._color[1], self._color[2] )            
        canvas.drawRect( self._x, self._y, self._width, self._height )
         
class Car:
    def __init__( self, x, y, width, height, color ):
        self._x       = x 
        self._y       = y 
        self._width   = width
        self._height  = height
        self._color   = color   # list of 3 ints between 0 and 255

        # build the body
        self._top  = Rectangle( x+width//4, y-height//2,
                                width//2, height//2,
                                color )
        self._body = Rectangle( x, y, width, height, color )
        
        # build the wheels
        self._w1 = Wheel( x + width//4, y + height, width//5 )
        self._w2 = Wheel( x + 3*width//4, y + height, width//5 )

    def setRandomColor( self ):
        self._top.setRandomColor()
        self._body.setRandomColor()
        
    def getTotalHeight( self ):
        return self._height*2 +  self._width//10

    def getTotalWidth( self ):
        return self._width
        
    def draw( self, canvas ):
        self._body.draw( canvas )
        self._top.draw( canvas )
        self._w1.draw( canvas )
        self._w2.draw( canvas )

class Truck:
    def __init__( self,  x, y, width, color ):
        self._x       = x 
        self._y       = y 
        self._width   = width
        height        = 5 * width//14
        self._height  = height
        self._color   = color   # list of 3 ints between 0 and 255

        
        # build the body
        self._top  = Rectangle( x+ 9* width//14, y-height,
                                width*5//14, height,
                                color )
        self._window = Rectangle( x+ 10* width//14, y-4*height//5,
                                width*4//14, 4*height//5,
                                (0, 0, 0 ) )
        self._body = Rectangle( x, y, width, height, color )
        
        # build the wheels
        self._w1 = Wheel( x + 2*width//14, y + 13*height//10, 3*height//5 )
        self._w2 = Wheel( x + 11*width//14, y + height, width//2 )

    def getTotalHeight( self ):
        return self._height*2 +  self._width//2

    def getTotalWidth( self ):
        return self._width

    def setRandomColor( self ):
        self._top.setRandomColor()
        self._body.setRandomColor()
    
    def draw( self, canvas ):
        self._body.draw( canvas )
        self._top.draw( canvas )
        self._window.draw( canvas )
        self._w1.draw( canvas )
        self._w2.draw( canvas )
    
   
            
def main():
    seed()
    win = GraphicsWindow(MAXWIDTH, MAXHEIGHT)
    canvas = win.canvas()
    
    canvas.setBackground( 0, 250, 250 )
    
    carWidth = 90
    carHeight = 25
    oddEven = True
    for y in range( 0, MAXHEIGHT, carHeight*2 ):#+20 ):
        for x in range( 0, MAXWIDTH, carWidth+10 ):
            if oddEven:
                c = Car( x, y, carWidth, carHeight, ( 0, 0, 0 ) )
            else:
                c = Truck( x, y, carWidth, (0, 0, 0 ) )
            c.setRandomColor()
            c.draw( canvas )
        #oddEven = not oddEven

    banner = Rectangle( MAXWIDTH//3, 2*MAXHEIGHT//5,
                        MAXWIDTH//3, MAXHEIGHT//5, (255, 255, 255 ) )
    banner.draw( canvas )
    canvas.setTextFont( 'arial', 40, 'bold' )
    canvas.drawText( MAXWIDTH//3+10, 2*MAXHEIGHT//5+30,
                     "Happy Easter" )
    win.wait()
    win.close()
    
main()

</showafterdate>

CSC111 Homework 9 2018

Contents

Problem 1

Your assignment

Submission

Requirements

Hints

Submission

Problem 2

Fancy Cars

Solution Programs

Part 1

Part 2

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