一种改进的海洋场景中反射光学效果实时渲染方法  

Improved Real-time Reflection Method of Reflection Optical Effect in Ocean Scene

作　　者：唐勇[1,2] 张浩然 李颖 张利辉[1,2] 刘丁 周升腾[1,2] 王赛 TANG Yong;ZHANG Hao-ran;LI Ying;ZHANG Li-hui;LIU Ding;ZHOU Sheng-teng;WANG Sai(The College of Information Science and Engineering,Yanshan University,Qinhuangdao 066004,China;The Key Laboratory for Computer Virtual Technology and System Integration of Hebei Province,Qinhuangdao 066004,China)

机构地区：[1]燕山大学信息科学与工程学院,河北秦皇岛066004 [2]河北省计算机虚拟技术与系统集成重点实验室,河北秦皇岛066004

出　　处：《小型微型计算机系统》2018年第9期2081-2084,共4页Journal of Chinese Computer Systems

基　　金：河北省自然科学基金面上项目(F2018203060)资助;秦皇岛市科学技术研究与发展计划项目(201602A018)资助

摘　　要：针对目前海洋场景中,海面反射光学效果真实感和实时性较不完善的问题,提出一种基于渲染到纹理(RTT)和投影反射矩阵的改进方法.首先,根据快速傅里叶变换(FFT)理论,采用由风力驱动的长短波统一的方向谱,解决海浪建模时控制因素较多所引起的波浪运动单一性问题;然后,在海洋双向反射分布函数模型下,以渲染到纹理的技术为基础,对标准的投影反射矩阵进行修改,同时引入控制因子,将投影纹理进行矩阵变换,改善目前海面倒影静止且不可控的渲染结果;最后,在投影反射计算中,重定向反射平面,消除由于修改反射矩阵所造成的反射纹理被过度剪裁的现象.For the reflection optical effect and the real time performance are poor in the ocean scene，we propose an improved method based on rendering to texture（RTT）method and reflection matrix.Firstly，according to the theory of fast Fourier transform（FFT），a unified directional spectrum for long and short wind-driven waves is used to solve the problem of poor wave motion in ocean wave modeling.Then，on the basis of the ocean BRDF model，the RTT Technology is used，and the reflection matrix is modified.At the same time，the control factor is introduced to transform the texture to improve the rendering results that the reflection is still and uncontrollable.Finally，in the projection reflection calculation，the reflection plane is redirected to eliminate the phenomenon that the reflection texture is over cut.

关 键 词：海洋场景 渲染到纹理 快速傅里叶 双向反射分布函数 反射矩阵 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]