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- W2051156737 abstract "A visibility-ordering of a set of objects from some viewpoint is an ordering such that if object a obstructs object b , then b precedes a in the ordering. An algorithm is presented that generates a visibility-ordering of an acyclic convex set of meshed convex polyhedra. This algorithm takes time linear in the size of the mesh. Modifications to this algorithm and/or preprocessing techniques are described that permit nonconvex cells nonconvex meshes (meshes with cavities and/or voids), meshes with cycles, and sets of disconnected meshes to be ordered. Visibility-ordering of polyhedra is applicable to scientific visualization, particularly direct volume rendering. It is shown how the ordering algorithms can be used for domain decomposition of finite element meshes for parallel processing, and how the data structures used by these algorithms can be used to solve the spatial point location problem. The effects of cyclically obstructing polyhedra are discussed and methods for their elimination are described, including the use of the Delaunay triangulation. Methods for converting nonconvex meshes into convex meshes are described." @default.
- W2051156737 created "2016-06-24" @default.
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- W2051156737 date "1992-04-01" @default.
- W2051156737 modified "2023-09-23" @default.
- W2051156737 title "Visibility-ordering meshed polyhedra" @default.
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- W2051156737 doi "https://doi.org/10.1145/130826.130899" @default.
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