Introduction to Solid Modeling
Introduction to Solid Modeling
Geometric and solid modeling: an introduction
Geometric and solid modeling: an introduction
Constructive non-regularized geometry
Computer-Aided Design - Beyond solid modelling
Maintaining multiple views in feature modeling
SMA '97 Proceedings of the fourth ACM symposium on Solid modeling and applications
Geometric compression through topological surgery
ACM Transactions on Graphics (TOG)
Collaborative solid modeling on the WWW
Proceedings of the 1999 ACM symposium on Applied computing
Representations for Rigid Solids: Theory, Methods, and Systems
ACM Computing Surveys (CSUR)
Parametric and Feature Based CAD/Cam: Concepts, Techniques, and Applications
Parametric and Feature Based CAD/Cam: Concepts, Techniques, and Applications
A Framework for Streaming Geometry in VRML
IEEE Computer Graphics and Applications
Direct incremental transmission of boundary representation
SM '03 Proceedings of the eighth ACM symposium on Solid modeling and applications
A method and tool for human-human interaction and instant collaboration in CSCW-based CAD
Computers in Industry - Special issue: Collaborative environments for concurrent engineering
Advances in collaborative CAD: the-state-of-the art
Computer-Aided Design
Collaborative computer-aided design-research and development status
Computer-Aided Design
An effective approach to compression and transmission of feature-based models
CSCWD'05 Proceedings of the 9th international conference on Computer Supported Cooperative Work in Design II
| Hi-index | 0.00 |
Currently boundary representations (b-reps) are a convenient means to exchange solid models between applications in a distributed design environment. There are two widely used approaches that help maintain the consistency of b-reps between applications, e.g., when a b-rep is modified in one application and needs to be updated in the other. One approach involves using a common database of b-reps where consistency is automatically guaranteed. The other approach involves using a repeated transfer of the entire b-rep using ftp-like protocols. The former results in a system that is not truly distributed and the later results in consuming large amounts of network bandwidth and unacceptable latencies. This paper seeks to alleviate the abovementioned disadvantages by introducing a scheme for the incremental exchange of b-reps (i.e., for incrementally updating a pre-edit model to be consistent with the post-edit model) between applications in a collaborative design environment. Note that this work does not focus on techniques that maintain or verify the validity of post-edit models. It is assumed that all edits performed are valid.The essential components of this paper include algorithms to (a) dynamically decompose the pre- and post-edit b-reps into volumetric regions, (b) identify and extract those regions in the post-edit model that have been modified, and (c) dynamically transmit and embed modified regions into a pre-edit b-rep at another site. The domain of objects is restricted to specialized non-manifold objects with manifold volumetric regions. The abovementioned algorithms are based on a cellular model that tracks decomposed regions in a b-rep. Non-regularized Boolean operations are used to introduce decompositions in the cellular model. The conditions for detecting changes in regions are studied. Finally, specialized extracting and embedding operations are defined on cellular models for extracting modified cells from post-edit models and embedding modified cells into the pre-edit models.