Program Implementation

Section 18.7 Program Implementation - Final

Now that we have all the building blocks, let’s give a name to the lines of code that do the work of drawing the house.

The instructions to goto particular locations and drawWall, drawDoor, etc… have all been moved into a procedure to make it more clear what the overall goal of the instructions is. But, we have not given that procedure a name. Chose a name for the procedure that draws the whole house and replace the _____________ below with your name. Make sure to replace it in both the procedure definition and the procedure call.

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Checkpoint 18.7.1.

Name the procedure that draws the house.

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def rectangle(turtle, width, height):
    # Assumes turtle faces East to start with
    turtle.pendown()
    turtle.begin_fill()
    turtle.forward(width)
    turtle.right(90)
    turtle.forward(height)
    turtle.right(90)
    turtle.forward(width)
    turtle.right(90)
    turtle.forward(height)
    turtle.right(90)
    turtle.end_fill()
    turtle.penup()

def drawWall(turtleName):
    turtleName.fillcolor("tan")
    rectangle(turtleName, 300, 200)

def drawDoor(turtleName):
    turtleName.fillcolor("black")
    rectangle(turtleName, 50, 100)

def drawWindow(turtleName):
    turtleName.fillcolor("light blue")
    #first row
    rectangle(turtleName, 25, 25)
    turtleName.forward(25)
    rectangle(turtleName, 25, 25)
    turtleName.backward(25)
    #reposition
    turtleName.right(90)
    turtleName.forward(25)
    turtleName.left(90)
    #second row
    rectangle(turtleName, 25, 25)
    turtleName.forward(25)
    rectangle(turtleName, 25, 25)

def drawRoof(turtleName):
    turtleName.fillcolor("brown")
    turtleName.pendown()
    turtleName.begin_fill()
    turtleName.left(30)
    turtleName.forward(173)
    turtleName.right(60)
    turtleName.forward(173)
    turtleName.right(150)
    turtleName.end_fill()
    turtleName.penup()

def _____________(turtleName):
    turtleName.goto(-150, 50)
    drawWall(turtleName)
    turtleName.goto(-25, -50)
    drawDoor(turtleName)
    turtleName.goto(-100, 0)
    drawWindow(turtleName)
    turtleName.goto(50, 0)
    drawWindow(turtleName)
    turtleName.goto(-150, 50)
    drawRoof(turtleName)

# main program
from turtle import *
steve = Turtle()
steve.speed(0)
steve.penup()
_____________(steve)      # call your procedure

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