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.

Checkpoint 18.7.1.

Name the procedure that draws the house.

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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