Homework 4: Turtle Art

Assigned: Monday September 12, 2016
Due: noon., Friday September 16, 2016
Summary: The goal of this assignment is to get a little experience with graphics programming, writing a function, and using the turtle module.
Collaboration: Do this assignment with a partner of your choice, or on your own.
Submitting: Submit a Python program using the online turnin form. See below.
Scoring: 10 points

Preparation

Create a directory called graphicsintro that will hold all of your work for this assignment.
Save the my_artwork.py module into your graphicsintro directory, and open it up. Read through the code and see if you can figure out what it will do.
Start a terminal and open a Python interpreter. At the Python prompt, type as follows:
```
>>> import my_artwork
>>> my_artwork.drawpic() 
```
What do you see?
Try modifying the program to accomplish the following:
- Make the square into a tall, skinny rectangle.
- Draw a second square inside the rectangle.
Some of the documentation for the Turtle class is in the textbook. Take a few minutes to skim through the documentation to familiarize yourself with what is there. Then try picking out a few methods that look like they might be interesting, and try them out. Modify your program to use other methods from the book.

Assignment

Write a Python program named drawing.py. Your program should create a Turtle object and use the methods in the book to draw a picture.

Put the code that does this drawing inside a function named drawpic, so your code can be run in the same way as the code is run in my_artwork.py. Spend a little bit of time experimenting with the different methods, and then figure out how to combine these methods to draw more complex shapes or pictures.

Some ideas:

Combine simple shapes in more complex ways. For example, combine triangles to form a star, or circles to generate different patterns, or rectangles to create a tic-tac-toe board.
Use arithmetic operations to compute relationships between components of your picture.
Use loops to perform repeated tasks.
Use functions to draw components of your picture. Use parameters to provide varied inputs to these functions, to create components that are "similar but different."
Use the time module for animation as follows. Add the line import time to the top of your program. This gives you access to the sleep function, which will force Python to wait a certain period of time. For example, time.sleep(5) will make Python wait 5 seconds.

Be creative, and have fun!

Submitting your work

Submit one file, drawing.py, using the turnin form.

Janet Davis (davisj@whitman.edu). Adapted from an assignment by Andy Exley.

Created September 12, 2016
Last revisedSeptember 12, 2016, 02:21:07 PM PDT
CC-BY-NC-SA This work is licensed under a Creative Commons Attribution-Noncommercial-Share Alike 3.0 United States License.