基于Web的风场三维动态可视化设计与仿真

针对在Web端难以快速直观表达风场问题，提出一种基于Web的风场三维动态可视化设计与仿真方法。首先，为解决风场数据不易获取、处理不便问题，给出风场数据的获取、转换、应用流程。其次，设计使用Web Worker多线程技术并行计算生成流线的方法，减少风场流线寻迹生成时间，提高流线生成效率。然后，结合颜色映射技术，设计对流线进行Alpha颜色通道动态修改的方法，以表征风场动态流动。最后，扩展基于Web GL的可视化引擎Cesium进行风场三维可视化渲染，直观表达风场。结果表明，该方法能有效提高在Web端进行风场可视化仿真的效率，可为防风减灾提供支撑。

3D Dynamic Visualization Design and Simulation of Wind Field on Web

In view of the difficulty in displaying the wind field quickly and visually on the Web, a Web-based 3D dynamic wind field visualization design and simulation method was proposed. Firstly, in order to solve the problem that wind field data is difficult to obtain and inconvenient to deal with, the process of wind field data acquisition, conversion, and application was given. Secondly, a method was designed to use Web Worker multi-threading technology to calculate and generate streamlines in parallel to reduce the generation time of wind field streamline tracing and improve the efficiency of streamline generation. Thirdly, combined with color mapping technology, a method to dynamically modify the streamline’s Alpha color channel to characterize the wind field movement was designed. Finally, the WebGL-based visualization engine Cesium was extended to perform the three-dimensional visualization rendering of the wind field, which can directly demonstrate the wind field. The results show that this method not only improves the efficiency of wind field visualization simulation on the Web, but also helps mitigating windstorm disaster.