VR系统三维建模中细节水平分割的分析

Analysis of LOD in the Modeling of VR System

在虚拟现实系统中，对三维图象的生成及显示速度提出了新的要求。由于人的眼睛对物体的细节反应随距离的变化而不同，基于此特性，我们设立一模型。该模型随着距离的增大而逐渐降低其复杂度描述以加快图象生成速度。在保证物体的细节和视觉效果上，阐述了分割的方法以及分割与视距和物体的距离区间的划分方法的关系，并提出对物体在同一细节层次上进行分割处理的概念，同时还对分割的具体实施提供了算法。

The VR system demands the higher creating and displaying speed of 3-D graphics．For this sake，based on the principle that the eves＇reaction to the delail of object is different as the distance changes,a model which provides different complexity description for an object according to the distance is presented in thispaper．Meaanwhile,the method and principle of description are also provided．After that，we propose a concept of handling object on the same detail layer and the corresponding algorithm．[