The set of interpreted gestures is object-class dependent. A set of universal gestures apply to all objects. The actions that can be done with an object are dependent on its type. A special class of visual objects are visual instruments, which provide affordances for operating on other objects. Sweep over an action bar 2.
Selection is accomplished by sweeping over one of the bars.
A stroke across the animator sets it moving in the indicated direction if it is still, or stops it if it is going the opposite direction. A properties gesture on the indicator lets the position be entered symbolically. Implementation of the instruments using millefeuille is underway at the time of submission. Full implementation and initial testing are anticipated by summer. We thank Pat Hanrahan for his ideas and support, Cindy Chen and James Davis for the pointer tracking, Greg Humphreys and Diane Tang for graphics support, Richard Salvator and Brad Johanson for integration, Kathleen Liston for application domain and interaction design.