Implementing a Zooming User Interface: Experience Building Pad++

13 years 4 months ago

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We are investigating a novel user interface paradigm based on zooming, in which users are presented with a zooming view of a huge planar information surface. We have developed a system called Pad++ to explore this approach. The implementation of Pad++ is related to real-time 3D graphics systems and to 2D windowing systems. However, the zooming nature of Pad++ requires new approaches to rendering, screen management, and spatial indexing. In this paper, we describe the design and implementation of the Pad++ engine, focusing in particular on rendering and data structure issues. Our goal is to present useful techniques that can be adopted in other real-time graphical systems, and also to discuss how 2D zooming systems differ from other graphical systems. Keywords Zooming User Interfaces (ZUIs), Real-time Computer Graphics, Animation, 3D Graphics, Windowing Systems, User Interface Management Systems (UIMS), Pad++. Availability Pad++ is available for non-commercial (educational, research an...

Benjamin B. Bederson, Jonathan Meyer

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