Accession Number : ADP000157

Title :   Simplified Scene Modeling Using Curved Surfaces and Texturing,


Personal Author(s) : Gardner,Geoffrey Y. ; Gelman,Bob

Report Date : 1982

Pagination or Media Count : 7

Abstract : Constructing a scene data base for current computer image generation systems is a costly and time-consuming task. Thousands of edges must be defined by positioning the end points, or vertices, of each edge. In addition, edges bounding a common surface or face must be linked in a list. Data for each face must include information for a normal vector, and data for faces representing curved objects must include information for normal interpolation to simulate smooth shading across the object. This paper describes a more efficient scene model that is earlier to construct and yet produces a more faithful representation of the real world. Scene geometry is modeled by quadric surface bounded by planes. Scene detail is modeled by a mathematical texturing function which modulates surface shading intensity and translucence. The paper describes how the new model simplifies modeling terrain, cultural features, moving targets, and special effects. (Author)

Descriptors :   *Computerized simulation, *Data bases, *Image processing, Systems engineering, Human factors engineering, Training devices, Scenarios, Mathematical models, Curvature, Surfaces, Texture, Real time, Terrain models, Moving targets, Efficiency

Distribution Statement : APPROVED FOR PUBLIC RELEASE