基于物理的海浪场景的真实感建模与绘制  

Physically Based Realistic Modeling and Rendering of Ocean Waves

作　　者：延诃[1] 王章野[1] 廖斌斌[1] 黄若冠[1] 彭群生[1] 

机构地区：[1]浙江大学CAD&CG国家重点实验室

出　　处：《计算机辅助设计与图形学学报》2008年第9期1117-1125,共9页Journal of Computer-Aided Design & Computer Graphics

基　　金：国家“九七三”重点基础研究发展规划项目(2002CB312101);国家“八六三”高技术研究发展计划(2007AA01Z316,2006AA01Z314);国家自然科学基金(60603076);上海市科委自然科学基金项目(07ZR14035);上海市青年科技启明星计划项目(08QA14025)

摘　　要：提出一种基于物理的海浪场景的真实感建模与绘制算法.基于平滑粒子流体动力学模型,首先提出一种压力状态方程以取代传统的理想气体状态方程,从而在保证系统稳定性的同时,最大程度地保证液体的体积守恒;为了实现对水面浪花飞溅和泡沫的模拟,提出自适应的表面张力模型,通过制定3类流体粒子状态的转化规则,实现了飞溅粒子和主水体之间的无缝连接;并采用GPU图形硬件加速技术大大地提高了整个过程计算效率.最终绘制出海浪行进、翻卷、破碎及拍岸等真实感较强的动态效果.A new physically based method on realistic modeling and rendering of ocean waves is proposed. Based on the smoothed particle hydrodynamics model, we first establish a new pressure equation of state instead of traditional ideal gas equation of state. With this method we can adequately preserve the volume of fluid without loss of system stability. Then we present a novel method of generating realistic ocean waves with splashes and foam by using an adaptive surface tension model in which all particles of fluid are classified into three states. These states can be transferred between each other according to the interchange rules, which makes seamless connection between splashes and the water volume. Besides, a special fluid solver using the GPU is designed to enhance the whole computation efficiency. Finally, various ocean wave scenes including advection, overturning and breaking waves, waves striking a bank etc. , are realistically rendered at an acceptable speed.

关 键 词：自然场景模拟 海浪 基于物理的建模与绘制 平滑粒子流体动力学 自适应表面张力模型 GPU 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]