GPU在实时阴影绘制中的应用  

Real-Time Shadow Rendering Using GPU

作　　者：刘双[1] 申闫春[1] 狄翠萍[1] 

机构地区：[1]北京信息科技大学计算机学院,北京100192

出　　处：《计算机技术与发展》2009年第11期226-229,共4页Computer Technology and Development

基　　金：北京市教育科研计划项目(KM200811232006);科技型创新基金(BT2008-13)

摘　　要：实时阴影在增强三维场景真实感方面起着非常重要的作用。阴影体算法是实时阴影绘制中效果非常理想的一种方法。但是随着场景复杂度的增加,该算法计算量比较大,将导致绘制效率的降低。另一方面,随着可编程GPU技术的发展,GPU的渲染速度远远大于CPU,为提高三维场景的渲染效率提供了更大的空间。在此基础上,介绍了一种在GPU上生成阴影体的方法,加速实时阴影绘制。利用图形硬件的图形处理单元(GPU)的运算能力和可编程性,将生成阴影体的大量计算从CPU转移到GPU,从而有效地提高实时阴影的绘制效率。Real- time shadow is very crucial for improving 3D scene reality. Shadow Volume algorithm is one of the most effective algorithms for Real - Time shadow computation. However, as the complexity of the scenes increasing, this algorithm may slow down the render efficiency because it needs more computation. On the other hand, with the development of programmable GPU, the render speed of GPU is much faster than CPU, and it has provided more space for the render efficiency acceleration of the 3D scenes. Based on this, introduced a method, which generate shadow volume on GPU to faster Real - Time shadow rendering. With the use of computation capacity and programmability provided by graphics processing unit（GPU）of underlying graphics hardware, most of computation of generating shadow volume are transferred from CPU to GPU, and this method can effectively accelerate real - time shadow rendering.

关 键 词：图形处理单元 阴影体 几何着色器 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]