基于简约多向光照散射的粒子云模拟与绘制  

Cloud Simulation and Rendering Based on Simple Multiple Illumination Scattering

作　　者：吴巍屹 古平 刘洁 刘彬 WU Weiyi;GU Ping;LIU Jie;LIU Bin(Shijiazhuang Campus of Army Engineering University,Shijiazhuang 050091)

机构地区：[1]陆军工程大学石家庄校区,石家庄050091

出　　处：《计算机与数字工程》2021年第5期998-1002,共5页Computer & Digital Engineering

摘　　要：针对云模拟的真实性和渲染的实时性等关键问题,优化了传统粒子系统结构设计,引入了伪粒子系统的思想来提高绘制效率。同时,提出了一种简约光照替代方法并改进了散射状态函数,使云粒子在多向散射光照模型中模拟云的光照属性并沿视点方向呈现各向异性性。实验表明该方法原理简单、易于实现、模拟仿真效率较高,可实时获得形象逼真、自投影光照散射云。To solve the important problem for the authenticity of cloud simulation and real-time rendering,the structure of tra⁃ditional particle system is optimized and the idea of pseudo-particle system is introduced to improve the efficiency of rendering.Be⁃sides,a simplified method of illumination substitute is proposed and the phase function of scattering is improved,it can simulate the optical attribute in the approximate multiple scattering and show the anisotropy in the view direction.The result of the experi⁃ment demonstrates this method can implement simply,render efficiently and create the real-time,realistic and self-shadow optical cloud.

关 键 词：云粒子系统 伪粒子系统 简约光照替代 状态函数 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]