If you form a pair, you must specify the ``division of labor'' (e.g., who did what) in your assignment writeup (scores will be divided equally, however).

• Add a window to your 3D object viewer which will allow the user to draw control points on a 2D grid by clicking the mouse.
• The user should be able to select and move the points with the mouse as desired.
• You should also provide the functionality for ``snapping'' to grid verteces. The user should be able to toggle this feature on and off.
• Using another toggle button, allow the user to turn on and off the drawing of intermediate line segments, as drawn by your spline curve generator.
• Provide a slider which will vary the step size (granularity) of your spline curve.
• Upon pressing a ``sweep'' button, the user should be presented with the newly created 3D object in the object viewing window. A slider should also be provided to allow the user to vary the step size (number of degrees) for the sweep.
• Provide a way for the user to save the object in a .pol file.

• The 2D grid should be within the x-y plane, with the vertical axis butting against the y-axis, and the horizontal axis centered at the origin, e.g.,

  				y
  				|
  				|
  				+------- x
  				|
  				|
  		

  Using this location of the grid, the 3D object generated by sweeping about the y-axis should be centered about the origin.
• Use orthographic projection within the curve-drawing window.
• Keep the number of user-created control points limited. A search of the control point array will be required to allow re-location of the points by the user.
• When sweeping, take care to avoid duplicating points when connecting faces. During object creation, you should calculate face and vertex normals.

1. Cover page containing names of all participants: Course Id--Section No.
   Name:
   SS No:
   Assignment No.
   
2. Assignment description
3. Program features
4. User guide