Objectives

The assignment is to bring together the lsystem and turtle_interpreter pieces to make a scene that consists of fractal shapes, trees, and other turtle graphics (think back to projects 1, 2 and 3). Your top-level program will include both the lsystem and turtle_interpreter modules.

Tasks

Abstract Image

Create a file called abstract.py. The file will need to import sys, turtle, lsystem, and turtle_interpreter. Write a function that creates an abstract image using L-systems. This image should be constructed to take advantage of your Python programming skills -- don't rely wholly on the random package and a loop. Your goal should be complexity, yet order in your image and simplicity in your code. One idea is to make an interesting pattern by drawing the same L-system in different positions. Using a hierarchy of functions is also a powerful tool.

Your image should include at least three different L-systems, with at least one of them using brackets. Don't feel beholden to use the suggested number of iterations or angles for any L-system. You can get the filenames for the L-system files from the command line, by asking the user for them, or by hard-coding them.

In your image function, you can use turtle commands to pick up the pen, move it to a new location, change colors, change pen widths, and put down the pen before drawing a new shape.

A picture with 3 different L-systems is required image 1.

Grid

Make a new file grid.py that contains a function that draws a set of 9 trees based on the systemB L-system, or some variation of it that has brackets. Order the 9 trees as a 3x3 grid. From left to right the number of iterations of the L-system should go from 1 to 3. From top to bottom, the angle of the L-system should be 22, 46, and 60. Use a double for-loop to create the grid.

A picture with a grid of L-systems is required image 2.

Scene

Make a new file scene.py that makes a non-abstract scene with two or more objects generated using L-systems. The scene must include at least one new L-system with brackets (e.g. a tree) that you haven't used yet. You can use one of the L-systems from ABOP (look at pages 9, 10, and 25 for single-rule L-systems) or make up one of your own. The scene does not need to be complex, but your code should exhibit modularity and good design.

A scene that includes 2 different L-systems is required image 3.

Example Extensions

Writeup

Make a new wiki page for your assignment. Put the label cs151s18project7 on the page. Make sure that it is there.

In addition to making the wiki page writeup, put the python files you wrote on the Courses server in your private directory in a folder named project7.

Colby Wiki

In general, your writeup should follow the outline below.


© 2018 Caitrin Eaton.