A hybrid motion prediction method for caching and prefetching in distributed virtual environments
VRST '01 Proceedings of the ACM symposium on Virtual reality software and technology
Cooperative object manipulation in immersive virtual environments: framework and techniques
VRST '02 Proceedings of the ACM symposium on Virtual reality software and technology
Incremental rendering of deformable trimmed NURBS surfaces
Proceedings of the ACM symposium on Virtual reality software and technology
An adaptive network architecture for close-coupled collaboration in distributed virtual environments
VRCAI '04 Proceedings of the 2004 ACM SIGGRAPH international conference on Virtual Reality continuum and its applications in industry
Detail sculpting using cubical marching squares
Proceedings of the 2005 international conference on Augmented tele-existence
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A lot of effort is now being put into developing collaborative distributed virtual environments. However, very few projects address collaborative virtual sculpting in which the shapes of the target objects are likely changing continuously.Some major issues including user interaction, data transmission, concurrent object editin by multiple clients and rendering of deforming objects must be addressed in a real-time context. In this paper, we propose a framework for collaborative virtual sculpting in a distributed virtual environment. The system is based on a hybrid model which merges the client-server and the peer-to-peer architectures to allow fast data replication. To support real-time deformation and rendering of deformable objects, we model each of these objects using NURBS surfaces and render them using the real-time deformable NURBS rendering method that we have developed. We will present a data structure for the transmission of these deformable objects. We will also introduce the idea of editing region and the corresponding locking mechanism for simultaneous editing of the same object by multiple clients. Toward the end of the paper, we will show some performance results of the prototype system.