Abstract
Automatic layout techniques have been used in a number of specific application domains, such as graph drawing and VLSI design. While these techniques are quite powerful, they are restricted to a particular domain and don't address the range of applications dealt with in 3D user interfaces. The Grappl system automatically generates 3D user interfaces at run time. Part of this process is placing user interface and application objects in 3D space. This is achieved by using policy techniques to automate the layout process. This paper presents some of the features and techniques that have been used in policy implementation, including relative position policy and grouping policy, with a few example applications.
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