- 专利标题: Visible-object determination for interactive visualization
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申请号: US09974623申请日: 2001-10-09
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公开(公告)号: US06445391B1公开(公告)日: 2002-09-03
- 发明人: Henry Sowizral , Karel Zikan
- 申请人: Henry Sowizral , Karel Zikan
- 主分类号: G06T1530
- IPC分类号: G06T1530
摘要:
A system and method for performing visible object determination based upon a dual search of a cone hierarchy and a bounding (e.g. hull) hierarchy. Visualization software running on a host processor represents space with a hierarchy of cones constructed by recursive refinement, and represents a collection of objects with a hierarchy of bounding hulls. The visualization software searches the cone and hull hierarchies starting with the root cone and the root hull. Before exploring a given cone-hull pair, a cone-restricted minimum distance between the cone and the hull is measured and compared to the visibility distance value of the cone. Only when the former is smaller than the latter will the cone be searched against the hull.
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