- draw_cube  v0.8 Draw a 3d cube.
- equilateral_shape  v0.2 Draw a shape that has a number of equal-length sides.
- point_in_polygon  v0.1 Check to see if a point is within a polygon.
- project_polygon  v0.5 Project a the points of a 3d polygon onto a flat 2d surface (the screen).
- raise_polygon  v0.1 Project a flat polygon into three dimensions.
- render_polygons  v0.5 Helper function to render polygons to the screen with a number of options.
- star_polygon  v0.1 Draw a regular star polygon.