1. Replay: An application for creating, editing, and replaying inked diagrams
Cem Cattikas
Alexander Jovanovic
Peter Lincoln
Marie Tessier
Nick Walker

2. Overview Foundations, the need for Replay
Concept and high level design
Creating, editing, and playing back diagrams
Replay’s compartmentalized design
Key challenges of designing Replay’s features

3. The Problem With Ink
Why use ink to simulate processes through diagrams?
A solution looking for a problem?
Is saving a diagram all that great?

4. Foundations
Harnessing the power of ink and correcting the weakness of static diagrams
We can save ink diagrams, but why can’t we fix them?
We can see ink diagrams, but why can’t we watch them?
The addition of animation to ink makes it a much more valuable standalone datatype because it could be stored in a simple format that could “plug in” to all sorts of stuff
Imagine taking notes by hand that move

5. Concept
Robustly support all aspects of diagram creation, editing and playback
A “stand-in” for someone drawing the diagram to teach you
Enables the playback of inked diagrams and “in time” editing

6. Diagram Creation Capture ink relative to time with “natural keyframes”
Let user choose breakpoints for premade process simulation creation
Import standard ink diagrams and apply user-chosen timing and keyframes
Can be used by an instructor lecturing in front of a classroom or by someone simply creating an animated process diagram to be viewed later

7. Diagram Editing
Timeline editing: move through the creation of your diagram as it was created
Edit, erase or replace strokes “as they happened” from the final diagram or “in time” with timeline editing
Other handy features: drying ink, layer locking, captions, onion skinning

8. Diagram Playback Step through the diagram keyframe by keyframe
View captions or hear lecture audio to increase understanding through enhanced context
Export to efficient and web-friendly formats: Flash, PowerPoint

9. A Showcase of Features Replay will be a standalone application
A demonstration of features designed to enhance a common use of Tablet PCs
Integration into other Tablet PC applications: Classroom Presenter, Journal-like note taking applications
We will be creating tools that could be integrated into other applications: the replay ink type, maybe some standard methods and stuff that work together
Could draw quick little process simulations for yourself if you are taking notes
Tpc is a solution looking for a problem

10. Key Challenges
Creating the core Visual Studio control from the ground up based on existing inkable objects
User interface considerations, especially timing and methods for editing ink
Creating a finished set of features that is powerful enough to justify actual use

11. Conclusion
Replay is a suite of features designed to make ink diagrams more powerful
Recording timing information for ink will allow playback and “in time” editing
Used by instructors and students or in other meeting environments to enhance lectures and simulate processes