快速凹凸贴图算法的改进与实现  

Improvement and realization of fast bump map algorithm

作　　者：廖锋峰[1] 陈张健[1] 程振波[1] 孙瑜磊[1] 

机构地区：[1]浙江工业大学软件学院,浙江杭州310032

出　　处：《浙江工业大学学报》2005年第2期188-190,230,共4页Journal of Zhejiang University of Technology

摘　　要：凹凸贴图是一种使得物体光滑的表面看起来凹凸不平的计算机绘图技术.为了克服传统的快速凹凸贴图算法中光源位置不易控制等缺点,使用了不同的方法计算当前像素的值来模拟不同的光源位置,并根据像素距光源的距离来模拟光线的衰减效果,同时介绍了一种亮度查找表的产生算法.使用该改进算法产生出的凹凸贴图图像具有较真实的三维形态,而且速度快,开销小,可以应用在开发各种计算机虚拟现实、计算机绘图、动画程序中.Bump mapping is a computer drawing technique that makes a flat surface look like it has small bumps on it. In order to overcome the traditional fast bump mapping shortcomings that the light source position can not be controlled easily, this article uses different methods to calculate the value of current pixel to simulate the different light source position and simulate the light fading effect according to the distance between the pixel and the light source. At last this article introduces a method to generate the light finding table. The bump mapping image that generated by this improved algorithm has a real three-dimensional configuration. The improved algorithm has the fast process speed and less spending and can be applied to develop computer virtual reality, computer drawing and computer animation program.

关 键 词：图算法 计算机绘图 绘图技术 三维形态 改进算法 虚拟现实 动画程序 光源 查找表 贴图 模拟 像素 光滑 图像 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术] TG376.3[自动化与计算机技术—计算机科学与技术]