基于球体的海洋标量场要素的三维可视化技术研究

Sphere based ocean environment scalar field element 3D visualization technology research

在分析海洋环境标量场要素数据特点,了解常规的海洋环境要素分析和可视化表达方式的基础上,对在三维球体模型上实现海洋标量场要素时空分析和可视化表达的方法和技术进行了研究.提出了海洋标量场要素数据的三维空间数据模型,以此为基础利用VC与Open GL技术实现纹理数据的实时绘制,并采用基于对象的方法在三维球体上对其进行可视化表达,实现了真正意义上基于地球球体模型的海洋标量场要素的可视化.该基于球体的可视化方式能更好地表现研究对象的区域特点,特别是在进行大范围区域乃至全球性研究时更具优势.同时,通过按需进行数据抽取,系统在数据加载效率与数据承载总量上都有所提高,在"数字海洋"原型系统中目前已经加载了全球范围多个精度的温度、盐度、密度、声速等标量场数据,并实现了业务化运行.

The methods and technology used to realize time and space analysis and visualization of ocean environment scalar field element were evaluated based on analysis of the characteristics of ocean environment scalar field element and traditional methods of ocean environment element data analysis and visualization.Based on the proposed 3D space data model of the ocean environment scalar field element,VC and Open GL were used to realize the real-time rendering of texture data.Object-oriented technology was used to visualize the model on a 3D sphere,and the earth-sphere model-based visualization of the ocean field element was realized in the real sense.This sphere-based visualization method has advantages in the aspect of displaying regional characteristics of the studied objects,especially in large-scale regional and global regional studies.In addition,the system showed increased data loading efficiency and total data load through data extraction on-demand,and the ＂Digital Ocean＂ prototype system is already loaded with global scale temperature,salinity,density,sound velocity and other scalar field data with different accuracies thus the ＂Digital Ocean＂ prototype system can be applied to routine operation.