PhysicsBook: a sketch-based interface for animating physics diagrams

We present PhysicsBook, a prototype system that enables users to solve physics problems using a sketch-based interface and then animates any diagram used in solving the problem to show that the solution is correct. PhysicsBook recognizes the diagrams in the solution and infers relationships among diagram components through the recognition of mathematics and annotations such as arrows and dotted lines. For animation, PhysicsBook uses a customized physics engine that provides entry points for hand-written mathematics and diagrams. We discuss the design of PhysicsBook, including details of algorithms for sketch recognition, inference of user intent and creation of animations based on the mathematics written by a user. Specifically, we describe how the physics engine uses domain knowledge to perform data transformations in instances where it cannot use a given equation directly. This enables PhysicsBook to deal with domains of problems that are not directly related to classical mechanics...

• Type: Journal
• Year: 2012
• Where: IUI
• Authors: Salman Cheema, Joseph J. LaViola Jr.
• Keywords: Graphical User Interfaces, Intelligent Tutoring System, IUI 2012, Prototype System, Software Engineering