Sketching Interfaces for 2D Animation of Simple Objects

This report describes efforts to apply sketching interfaces to animation. We deal with the problem of sketching 2-D mo­ tion paths for objects to produce animations for applications like Microsoft PowerPoint , Macromedia Flash or Director. We worked on the core problem of editing a sketched mo­ tion curve, using the approach of blending newly sketched motion paths with older paths to allow for successive refine­ ments of an animation. We describe various methods used to edit motion curves and their results.