摘要
针对复杂多边形场景 ,提出了一种基于层面叠加技术并能处理整体镜面反射分量的漫游算法 .此算法将整体镜面反射分量预处理和整个场景的预消隐紧密结合 ,把整体镜面反射的计算问题转化为求取光束 PVS( potentially visible set)的问题 .算法通过预处理 ,建立镜面 PVS映射 G和可能镜面入射光束集合 ;在漫游阶段 ,则通过执行 G映射并调用其他层面的光亮度计算过程 ,实时地合成整体镜面反射分量 .
Based on the overlay technique, the authors propose a novel algorithm for interactive walkthrough of complex polygonal virtual environments with global specular reflection effects in this paper. This algorithm integrates the global specular reflection preprocessing with visibility preprocessing. The problem of computing global specular reflection is then converted to that of determining the potential visible polygon set (PVS) through each mirror. A mirror PVS mapping G is constructed, associating the potential incidence beams with their respective PVS. At the stage of walkthrough, the proposed algorithm can synthesize the global specular reflection in real time by G mapping while calculating the other intensity components of the environment.
出处
《软件学报》
EI
CSCD
北大核心
2000年第9期1241-1247,共7页
Journal of Software
基金
国家自然科学基金!(No.6 982 30 0 3)
关键词
整体镜面反射
虚拟现实
虚拟场景
实时漫游
算法
Global specular reflection, virtual reality, PVS (potentially visible set), beam tracing.
