Transform2D.java is a library of static methods that performs geometric transforms (scaling, translation, and rotation) on polygons.
Art.java uses this library to create De Stijl-inspired line art. The program draws n-levels of rectangles that are randomly "split" horizontally or vertically, with each level scaling down to 50-90 percent of the previous level's size. Rectangle size, line thickness, and angle of split vary randomly across levels, so that a different graphic is produced each time the program is run.
For example, here are three variation of Art 1 through Art 9:
Sierpinski.java recursively plots a Sierpinski triangle of order n.