基于浅水方程和物理引擎的大尺度水环境模拟  

Simulation of Water Environment and Buoyancy Based on Shallow Water Equations and Physical Engine

作　　者：方超[1] 杨崇俊[1] 姚晓婧[1] 

机构地区：[1]遥感科学国家重点实验室(由中国科学院遥感信息科学重点实验室和北京师范大学遥感与地理信息系统研究中心联合组成),北京100101

出　　处：《系统仿真学报》2013年第2期270-275,共6页Journal of System Simulation

基　　金：国家自然科学基金(40801156)

摘　　要：三维系统的真实感是虚拟地理环境和虚拟现实中的研究热点,水体也是其中的重要部分。水体的实时渲染技术众多,但往往缺乏交互性。针对大尺度水体,采用浅水方程实时计算水体的表面形态;同时引入物理引擎库,实时计算出与水接触的物体的浮力,通过物理引擎的更新和模拟,实现物体的沉浮效果。水体与物体间的交互性则体现在:一方面物体影响了水体表面的水位高程,改变了水体形态;另一方面,水体形态的改变影响物体与水体的接触面,改变了物体所受的浮力。本算法能广泛用于船舶运动模拟等应用中。The sense of reality in 3D system has been a research hotspot in virtual geographic environment and virtual reality. The simulation of water is an important part in natural environment. In the past years, lots of technologies have been developed for real-time rendering of water, but often lack the interaction with other bodies. Shallow water equations were used to figure out the water surface. At the same time, the physical engine was introduced to calculate the buoyancy of any body in water and the real-time effect of buoyancy was realized. The bodies and water are interacted with each other. On one hand, the body affects the water level and changes the surface of water, and on the other, the changes of the water level affects the buoyancy on the body. The algorithm can be widely used for simulation of shipping.

关 键 词：浅水方程 物理引擎 高度场 虚拟现实 虚拟地理环境 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]