基于可编程图形硬件的实时阴影算法及实现

阴影在增强三维场景真实感方面起着非常重要的作用。随着计算机图形硬件的发展，利用可编程图形硬件加速并提高渲染效果已经成为主要发展趋势。基于当前可编程图形硬件技术，针对目前shadow maps算法存在的问题，提出了一种根据场景特征程序自动生成合适偏移量的实时的阴影生成算法，该算法很好的改善了阴影渲染效果，防止了走样。最后给出了算法基于GLSL着色语言的实现代码。

Real-time shadow algorithm and its implementation based on programmable graphics hardware

Shadow is very crucial for improving 3D scene reality. With the development of computer graphics hardware, it is the primary trend about improving render effect of 3D scene that using programmable graphics hardware. Based on these, the depth bias issue about shadow maps algorithm is discussed and a method to get a good depth bias according as 3D scene is provided. The shadow rendering effect is improved by this algorithm. At last, the realization by GLSL of this algorithm are given.