Level of Detail and Multi-Resolution Modeling Techniques for Virtual Design and Prototyping

Zhigeng Pan, Kun Zhou, Chiyi Cheng, Mingmin Zhang
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引用次数: 1

Abstract

Reconciling scene realism with interactivity has emerged as one of the most important areas in making virtual reality feasible for large-scale CAD data sets consisting of several millions of primitives. Level of detail (LoD) and multi-resolution modeling techniques in virtual reality can be used to speedup the process of virtual design and virtual prototyping. In this paper we present an automatic LoD generation and rendering algorithm which is suitable for CAD models and propose a new multi-resolution representation scheme called MRM (multi-resolution model), which can support efficient extraction of fixed resolution and variable resolution for multiple objects in the same scene. MRM scheme supports unified selective simplifications and selective refinements over the mesh. Furthermore, LoD and multi-resolution models may be used to support real-time geometric transmission in collaborative virtual design and prototyping.
虚拟设计和原型的细节水平和多分辨率建模技术
协调场景真实感与交互性已成为使虚拟现实在由数百万个原语组成的大规模CAD数据集中可行的最重要领域之一。虚拟现实中的细节层次(LoD)和多分辨率建模技术可以加快虚拟设计和虚拟样机的过程。本文提出了一种适用于CAD模型的LoD自动生成和绘制算法,并提出了一种新的多分辨率表示方案MRM (multi-resolution model),该方案可以支持同一场景中多个目标的固定分辨率和可变分辨率的高效提取。MRM方案支持对网格进行统一的选择性简化和选择性细化。此外,LoD和多分辨率模型可用于支持协同虚拟设计和原型制作中的实时几何传输。
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