研究多细节层次技术在虚拟环境中的广泛应用.提出了一种新的动态多细节层次结构，这个结构不仅可以适用于多种不同的拓扑结构保持的网格简化方法，还适用于拓扑可变的网格简化方法，可应用于任意网格模型.在此基础上还设计了一种基于拓扑结构可变的网格简化算法：顶点合并.通过顶点合并和顶点分裂两个对偶操作，实现不同细节层次模型之间的平滑转换，并能够自适应地改变模型的拓扑结构.%The computation and storage requirement for complex polygonal scenes far exceeds the capacity of modern graphics hardware. One approach to speed up rendering is to exploit level of detail (LoD) techniques in virtual environments. This paper presents a new dynamic LoD hierarchy. Arbitrary meshes and operations changing model's topological types are valid in our framework. In addition, we describe a mesh simplification method: vunify, which supports topological type modification to support this new framework.
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