View-Dependent Streaming of Progressive Meshes

  • Authors:
  • Affiliations:
  • Venue:
  • SMI '04 Proceedings of the Shape Modeling International 2004
  • Year:
  • 2004

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Abstract

Multiresolution geometry streaming has been well studiedin recent years. The client can progressively visualizea triangle mesh from the coarsest resolution to the finestone while a server successively transmits detail information.However, the streaming order of the detail data usuallydepends only on the geometric importance, since basicallya mesh simplification process is performed backwardsin the streaming. Consequently, the resolution of the modelchanges globally during streaming even if the client doesnot want to download detail information for the invisibleparts from a given view point.In this paper, we introduce a novel framework for view-dependentstreaming of multiresolution meshes. The transmissionorder of the detail data can be adjusted dynamicallyaccording to the visual importance with respect tothe clientýs current view point. By adapting the truly selectiverefinement scheme for progressive meshes, our frameworkprovides efficient view-dependent streaming that minimizesmemory cost and network communication overhead.Furthermore, we reduce the per-client session data on theserver side by using a special data structure for encodingwhich vertices have already been transmitted to each client.Experimental results indicate that our framework is efficientenough for a broadcast scenario where one server streamsgeometry data to multiple clients with different view points.