| Summary: | 碩士 === 國立交通大學 === 資訊工程系 === 88 === Level of detail (LOD) modeling or mesh reduction has been found
useful in interactive walkthrough applications. In particular, view-dependent LOD modeling has its strength in selective refinement and effective view and back-face culling.
In this paper, we propopse a view-dependent LOD modeling in
which the selective refinement is performed according to a dependency graph.
The dependency graph is constructed based on a progressive meshing scheme
that is clustering-based and takes both geometry and topology simplification
into account.
In the dependency graph, nodes represent the simplification steps while
the edges representing relations between nodes.
The relation associated with each edge is classified as either inheritance
or dependence relation in order to facilitate the use of spatial and
temporal coherence.
In the run-time or selective refinement phase, a scheme is proposed to
reduce the amount of selective and gauged nodes. Our experiments reveals
that the proposed scheme provides a steady and efficient computational
efficiency in the process of selective refinement.
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