Due: Tuesday, April 18, 2017, 11:59 pm
The project this week is to continue to make shape classes, making use of inheritance, starting with a tree class.
The first task is to make a Tree shape class, similar to the Square and Triangle classes. The difference between a Tree and a Square, though, is that the Tree generates its string dynamically using an L-system. The string for a Square is always the same, so it can set the string field once and then use the parent Shape class' draw method. However, every time we draw a tree, we first must build a string using an L-system. Then it can use the Shape draw method.
Because we use an L-system to generate the string to draw, a Tree object must contain an L-system, which means it must have a field that holds an L-system object.
Because a Tree is a Shape, it must be a child of the Shape class. That lets it use the parent methods for setting color, distance, and angle, among other things.
To make our Tree class, start by creating a file called tree.py. Import your lsystem and shapes modules. The Tree class should be derived from the Shape class, but you'll need to override some of the methods because of the special nature of a Tree: it needs more fields than a simple Shape, and it has to dynamically create the string it will draw using an L-system.
The methods you'll need to override or create for the Tree class include:
def __init__(self, distance=5, angle=22.5, color=(0.5, 0.4, 0.3), iterations=3, filename=None):- The init method should call the parent init with distance, angle, and color, store the iterations number in an iterations field, then create an Lsystem object (passing in the filename) and store it in an lsystem field.
read(self, filename)method that calls the lsystem's read method with the specified filename.
Once you've written the tree class, make a test function (outside of the class) for the class and try it out. The test method should take in an Lsystem filename, create a Tree object, and then use the Tree object's draw method to draw at least 3 trees. Use an L-system with multiple replacements for at least one rule and show the three trees are different.
The output of your tree.py test method is required image 1.
The output of your shapes.py test method is required image 2.
The indoor scene with a painting is required image 3.
tile(x, y, scale)that draws a set of shapes inside a square that is scale by scale in size with the lower left corner of the tile at location (x, y). If scale is 10, then the tile would be 10x10.
Then make a function
mosaic(x, y, scale, Nx, Ny) that
draws a 2D array of tiles Nx by Ny, where each tile is of size scale
by scale, and the lower left corner of the mosaic is at (x, y). So if
scale is 10, Nx is 3 and Ny is 4, the function should draw twelve
10x10 tiles three across and four down.
An image of at least 20 tiles (5 x 4) is required image 4.
Turn in your code by putting it into your private hand-in directory on the Courses server. All files should be organized in a folder titled "Project 9" and you should include only those files necessary to run the program. We will grade all files turned in, so please do not turn in old, non-working, versions of files.
Make a new wiki page for your
assignment. Put the label
cs151s17project9 in the label field
on the bottom of the page. But give the page a meaningful title (e.g.
Ying's Project 9).
In general, your intended audience for your write-up is your peers not in the class. Your goal should be to be able to use it to explain to friends what you accomplished in this project and to give them a sense of how you did it. Follow the outline below.
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