Project 7: Fractals and Trees
The assignment is to bring together the lsystem and 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 interpreter modules.
Create a file called abstract.py. The file will need to import sys,
turtle, lsystem, and interpreter. Write a function that creates an
abstract image using L-systems. Make one aspect of your image take
advantage of the capability of a computer to generate complexity with
simple code (don't rely wholly on the random package and a loop).
Your scene 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 into your code.
In your scene 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.
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
22.5, 45, and 60. Use a double for-loop to create the grid.
A picture with a grid of L-systems is required image 2.
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
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.
- Import one of your scenes from project 2 or 3 and add trees or fractal shapes to them. It's all turtle graphics, after all.
- Make your abstract image function take in (x, y, scale) as parameters and demonstrate you can properly translate and scale the abstract image by including multiple copies, at different locations and scales, in one scene.
- Make task two more interesting by adding additional elements to the image that also change across the grid. For example, make the trees move from summer to fall to winter along the horizontal or vertical axis.
- Give the function for task 2 the parameters (x, y, scale) and demonstrate you can properly translate and scale the grid.
- Create an L-system of your own that draws something interesting.
- Add leaves, berries, or color to your trees by adding symbols to the rules and cases to your interpreter. For each new symbol you use in a rule, you will need another elif case in your drawString function.
Make a new wiki page for your assignment. Give the page a useful title using English words. Put the label cs151f12proj7 on the page.
In addition to making the wiki page writeup, put the python files you wrote on the Courses server in your handin directory.
In general, your writeup should follow the outline below.
- A brief summary of the task, in your own words. This should be no more than a few sentences. Give the reader context and identify the key purpose of the assignment.
- A description of your solution to the tasks, including any images you created. This should be a description of the form and functionality of your final code. You may want to incorporate code snippets in your description to point out relevant features. Note any unique computational solutions you developed.
- A description of any extensions you undertook, including images demonstrating those extensions. If you added any modules, functions, or other design components, note their structure and the algorithms you used.
- A brief description (1-3 sentences) of what you learned.
- Don't forget to label your writeup so that it appears in the listing on the main wiki page for the course. For this lab, use cs151f12proj7