基于OpenGL三维河网地形与数据场的可视化

结合虚拟现实技术在数字流域中的应用,研究了数字高程模型的建立与三维地形实时绘制显示的机制.详细描述水利工程三维模型的构建及可视化仿真,在三维数字河网基础上叠加了实时计算的流场与温度场的数据,实现三维动态流场与温度场可视化.基于OpenGL环境开发的交互式可视化仿真系统形象地描绘流域内的地形场景、水利工程、河网等,对实现三维漫游、空间信息查询、洪水淹没分析和专业成果数据的可视化分析方面具有重要的作用.为分析水利水电工程建设对河道天然径流的影响,尤其是库区上下游水温方面的生态环境影响,提供了一个可视化的分析平台.

Visualization of 3D river network terrain and data field based on OpenGL

With the application of virtual reality technology to digital valley,the establishment of DEM and mechanism of real rendering display of 3D terrain are studied.The 3D modeling and visual simulation of hydraulic engineering is described in detail.The real-time computing data of flow field and temperature field are loaded based upon the 3D digital river network;and the visualization simulation of 3D dynamic flow field and temperature field are realized.The interactive visual simulation system which based on OpenGL vividly depicts the landform,hydrology engineering,and river network in the river basin;and it is very important to the realization of 3D roaming,space information query,analysis of flood submergence and visual analysis of professional production data.According to this system,a visual analysis platform is provided for analyzing the influence of hydraulic engineering construction on the runoff of natural riverway,especially,for the ecological environment impact of the water temperature of upstream and downstream of the reservoir.