快速凹凸贴图算法的改进与实现

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.

Improvement and realization of fast bump map algorithm

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.