Interactive Shadows

It is often difficult in computer graphics applications to understand spatial relationships betweenobjects in a 3D sceneor effect changes to those objects without specialized visualization and manipulation techniques. We present a set of three-dimensional tools (widgets) called "shadows" that not only provide valuable perceptual cues about the spatial relationships between objects, but also provide a direct manipulation interface to constrained transformation techniques. These shadow widgets provide two advancesover previous techniques. First, they provide high correlation between their own geometric feedback and their effects on the objects they control. Second, unlike some other 3D widgets, they do not obscure the objects they control. Keywords Direct Manipulation, 3D Widgets, Interactive Systems

• Type: Conference
• Year: 1992
• Where: UIST
• Authors: Kenneth P. Herndon, Robert C. Zeleznik, Daniel C. Robbins, D. Brookshire Conner, Scott S. Snibbe, Andries van Dam
• Keywords: Direct Manipulation, Software Engineering, Spatial Relationships, Spatial Relationships Betweenobjects, UIST 1992