一种面向交互式虚拟环境的自适应变形方法  

An Adaptive Deformation Method for Interactive Virtual Environment

作　　者：卢威[1] 潘金贵[1] 

机构地区：[1]南京大学计算机科学与技术系,南京210093

出　　处：《系统仿真学报》2012年第4期830-836,共7页Journal of System Simulation

基　　金：分布式虚拟环境中可扩展主动兴趣管理技术研究(60473113);远程沉浸式虚拟奥运博物馆关键技术研究(60533080);An Interactive Object Deformation Framework(KFKT2009A13)

摘　　要：研究针对交互式虚拟环境提出了一种自适应变形方法,基于累进网格和层次式聚类,为模型构建一个累进网格二叉树;根据此结构和环境参数,将网格模型划分为若干个子网格分别进行简化,再缝合成一个多细节层次模型作为变形过程的输入。为了简化变形过程,变形约束被标准化为四种变形基元,根据空间映射规则投影到多细节层次模型上,控制变形操作和保持模型属性不变。实验表明该方法能够动态地灵活地构建多细节层次网格模型和调整各种变形约束,并应用在一个交互式虚拟环境即虚拟博物馆浏览系统中,实现实时的变形操作和良好的视觉效果。For interactive virtual environment,a novel adaptive method was proposed to make use of hierarchical clustering to establish a hierarchical progressive mesh binary tree.Based on this structure,the original model was segmented into submeshes,which were simplified separately according to different environment parameters.Finally,a multi-level-of-detail model was achieved for deformation.To accelerate deformation on the multi-level-of-detail model,four constraint primitives and spatial projection rules were designed to normalize deformation constraints and preserve mesh features.Experimental results demonstrate that the novel method can compose a multi-level-of-detail mesh and modify deformation constraints dynamically and flexibly,which has been embedded into an interactive virtual environment-a virtual museum browsing system to guarantee the realtime deformation with desirable visual quality.

关 键 词：交互式虚拟环境 多细节层次 累进网格 网格变形 变形基元 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]