驾驶仿真中的车窗雨天特效实现  

Implementation of the Effects of Rainy Window with the Driving Simulation

作　　者：陈宏川[1] 苏虎[1] 杨彬[1] 

机构地区：[1]西南交通大学,成都610031

出　　处：《现代计算机》2013年第9期29-33,共5页Modern Computer

摘　　要：在仿真驾驶模拟中,对自然环境的模拟能增加用户的代入感,提高用户的真实体验。通常模拟驾驶系统容易忽略挡风玻璃上的雨雪效果,只进行交通区域的雨雪环境模拟,反而对用户驾驶体验有直接影响的车窗雨雪效果,却没有太多重视。本文主要研究雨滴在车窗上的运动规律及仿真效果,因为雨滴在车辆挡风玻璃上的数量较多,运动过程复杂,使得雨滴的实时模拟变得十分困难。针对如何构造仿真模型以及降低计算复杂度等问题展开研究,使用了GPU高级Shader语言,GLSL,采用其中的Geometry Shader优化模型渲染,代替传统的Billboard算法,实现粒子的并行运算,极大地提高运算和渲染的效率。在真实性方面使用法线纹理的方式模拟雨滴的折射反射效果,具有较高的真实度。Driving simulation, the analog of the natural environment can increase the user＇s sense of sub- stitution, and improve the user＇s real experience. Usually driving simulation system is easy to ig- nore the effects of rain and snow on the windshield, the only traffic area of rain and snow envi- ronment simulation. Instead window rain and snow effects have a direct impact on the user driv- ing experience, but not too much attention. Studies the law of motion of raindrops on the win- dows and simulation resuhs. Because a large number of raindrops on the windshield of a vehi- cle, the complexity of the course of the campaign, which makes real-time simulation of rain- drops become very difficuh. In this paper, the problem of how to construct a simulation model as well as to reduce the computational complexity expand. We use a GPU Advanced shader Language, GLSL, using the Geometry shader optimization model rendering, instead of the tradi- tional Billboard algorithm, so that the particles parallel computing, greatly improve the efficien- cy of computing and rendering. Authenticity using normal maps to simulate raindrops refracted reflection effect with high fidelity.

关 键 词：图形处理器 驾驶仿真 着色器 法线贴图 

分 类 号：U461[机械工程—车辆工程]