高速铁路长大线路可视化建模系统研制

Development of Visualization Modeling System for the Longer Lines of High-Speed Railway

在研究轨道结构形式的高速铁路长大线路的图形化动力学仿真建模中,模型的结构复杂,数据量庞大,如何提高建模效率、增强模型的可视化效果并减少对内存的占用成为首要解决的问题。通过对线路进行分段离散、合理设计绘制线程、输入\输出线程以及渲染线程的分工与同步,使计算机资源得到了充分的利用,提高了大规模图形的绘制效率,同时利用合理设计的大规模模型LOD(细节层次)显示算法和动态调度算法,提高了动力学仿真模型的渲染效率,增强了其可视化效果,也降低了其内存占用量,最终实现了高速铁路长大线路的可视化快速建模。最后通过应用实例证明了LOD显示和动态调度方法的有效性。

When the track structure of the longer lines of high - speed railway is considered in creating the dy- namic simulation model of graphical, model structure is complex with huge amount of data. So how to improve the modeling efficiency, enhance model visualization and reduce memory usage has become a primary problem to solving. The large - scale graphics drawing efficiency is improved by segmenting discrete rail, designing division and synchro- nization among drawing thread, I/O thread and rendering thread that makes full use of computer resources. The ren- dering efficiency of dynamics simulation model is improved, visualization effects are enhanced and the memory foot- print is reduced through reasonable design of large - scale model LOD display algorithm and dynamic scheduling algo- rithm. Thus, the fast visualization modeling of high - speed railway longer lines is realized. In the end, through ap- plication examples, the effectiveness of this method is demonstrated.