Generic computation of bulletin boards into geometric kernels

Nowadays, many commercial CAD systems are built on proprietary geometric kernels which provide an API containing a set of high level geometric operations (boolean operations, slot, chamfering, etc). Because of their complexity, these operations can generate important modifications on topological cells (vertices, edges, faces, volumes, etc.) of the objects. At the same time, many of these kernels need to know precisely what has occurred to each topological cell belonging to objects given or resulting from a previous high level geometric operation. At the end of each operation, the geometric kernel must provide a bulletin board describing cells' evolution through a list of events (split, merge, creation, deletion). Most commercial geometric kernels use B-Rep structures and provide methods enabling the developer of a CAD system to retrieve a number of events that occurred on cells. These kernels have their own scheme for detecting events, based on their own taxonomy of situations, h...

• Type: Conference
• Year: 2007
• Where: AFRIGRAPH
• Authors: Mehdi Baba-ali, David Marcheix, Xavier Skapin, Yves Bertrand
• Keywords: AFRIGRAPH 2007, Bulletin Board, Geometric Kernel, Level Geometric Operation, Virtual Reality