Improved compression of topology for view-dependent rendering

We present a simple and efficient representation to store and transmit connectivity data of view dependent meshes for out-of-core rendering of large datasets. Resident mesh data available for rendering is organized as vertex tree to support real-time visualization of huge models. Our approach is not restricted to manifold meshes and can be used in the presence of non topology-preserving refinement operations as well. In contrast to progressive mesh compression our representation allows selective access to relevant fractions of the refinement hierarchy. After new mesh refinements are received, the update of the resident hierarchy available for display does not rely on known topology in the neighborhood of the patches to be refined. Therefore our approach does not require dependencies. We compare our connectivity coding with an existing framework for efficient transmission of view-dependent meshes and obtained substantially better compression results.

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