Modélisation multi-échelle procédurale de scènes animées
Frank Perbet · HAL (Le Centre pour la Communication Scientifique Directe) · 2004
In computer graphics, 3D animated scenes are more and more rich and detailed. But the current techniques for managing such scenes cannot handle a wide range of observation scales. For example, creating models that allow to zoom from a galactic scale to an atomic scale is a very diffcult task. Our goal is to address this problem in the scope of real-time visualization using standard computers. First, we show that multi-scale procedural modeling is particularly well suited to solve this problem. More precisely, we use complexification modeling which describes a model by its coarse representation and a set of functions which adds local details until the required precision according to perceptual criteria. We introduce a new formalism based on the C++ language which is able to describe a large set of 3D animated models over a large range of scales. We propose a tool which implements this formalism called DynamicGraph. This tool consists of a specialized graphical interface and a real-time rendering algorithm which efficently evaluates the visibility and the required precision. Finally, we illustrate the potential of this approach by several case studies.