基于GPU雨场景的实时模拟  

Real-time simulation of the rain scene based on GPU

作　　者：唐玉蕾 袁赞[1,2] 吴志红[1,2] 

机构地区：[1]四川大学计算机学院,四川成都610065 [2]四川大学国家空管自动化系统技术重点实验室,四川成都610065

出　　处：《计算机工程与设计》2014年第6期2188-2191,共4页Computer Engineering and Design

基　　金：国家自然科学基金项目(60903118;60832011);国家科技支撑计划基金项目(2012BAH62F03)

摘　　要：为更实时地模拟雨的场景,采用改进的粒子系统来模拟雨的动画,并采用纹理技术来渲染雨滴。改进的粒子系统只需模拟一个指定立方体内固定数量的粒子,并通过对粒子重复利用,有效减少粒子系统的开销。在渲染雨的过程中,使用一个存于二维纹理数组中的数据库,该数据库存储了不同视点和光照方向下雨的外形;采用法线贴图及单个散射模型光照技术,逼真地模拟雨天潮湿路面及雨滴飞溅的效果。实验结果表明,在GPU上模拟雨的场景逼真度高,实时性好。To real-time simulate the rain scene,an improved particle system approach was applied to simulate the animating of the rain,and the technique of texture is presented to render rain.The improved particle system was only simulating and rendering a fixed number of the particles in a specified cube.This method is faster by reusing the particles.A library of textures stored in a 2D texture array which encoded the appearance of different rain drops under different viewpoints and lighting directions was used to render the rain particles.Finally,moist road and splashes were realistically simulated by applying normal mapping and a single scattering lighting model.The test results showed that using this method was efficient and real-time,and could enhance the visual realism on simulating the rain scene on GPU.

关 键 词：粒子系统 法线贴图 单个散射模型 雨天潮湿路面 雨滴飞溅 雨模拟 图形处理器 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]