一种基于层面叠加绘制技术的虚拟环境实时漫游算法  

A REAL TIME WALKTHROUGH ALGORITHM BASED ON OVERLAY TECHNIQUES FOR VIRTUAL REALITY

作　　者：傅晟[1] 鲍虎军[1] 彭群生[1] 

机构地区：[1]浙江大学CAD&CG国家重点实验室,杭州310027

出　　处：《计算机学报》1998年第S1期315-322,共8页Chinese Journal of Computers

基　　金：国家自然科学基金

摘　　要：虚拟现实等实时仿真技术的发展对计算机图形的实时生成提出了很高的要求．但随着场景复杂程度的提高，画面的真实感与画面生成的实时性之间产生了矛盾．我们注意到当观察者的视线快速掠过场景时，他并不关心所掠过景物的几何细节和光照细节，基于这一点，本文提出了一种基于层面叠加绘制技术的逐步求精的实时图形生成算法，它能够根据场景变化的快慢动态地决定画面绘制的精细程度，使得系统在绘制速度和画面质量之间达到一个平衡．Walkthrough in a virtual environment calls for real-time rendering algorithms. When thescene becomes more and more complex, however, there is a contradiction between the realism ofthe image and the rendering time. It is well known that when the viewer walks through the scenequickly, he actually pays little attention to the detail of the scene. This paper proposes a real-timerendering algorithm based on overlay techniques, it determines dynamically the amount of detail tobe rendered according to the walking speed of the viewer, the system then naturally reach a balancebetween the quality of the image and the speed of the rendering.

关 键 词：虚拟现实 实时显示 真实感图像 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]