2D Drawing Primitives
http://dmae03.blogspot.com/2009/01/session-2_26.html
Command and Data Entry
http://dmae03.blogspot.com/2009/01/selecting-objects.html
Selecting objects
http://dmae03.blogspot.com/2009/01/command-and-data-entry.html
Transformation Operations
http://dmae03.blogspot.com/2009/01/transformation-operations.html
Exercise 01: 2D Floorplan