基于OSG引擎的森林火势蔓延仿真系统关键技术研究

Research on Forest Fire Spread Simulation System Based on OSG

针对森林火势蔓延趋势的仿真推演需求,以及森林消防队伍的行动路线选择和实时路径生成的需要,提出了一种融合数字高程信息(digital elevation model,DEM)的扩展晶格模型,将地形的植被、受灾属性与地理高程信息进行结合,通过实时运算得到结果数据并转换为可渲染的资源形式,利用OSG三维渲染引擎将其呈现到最终用户层面。借助这一数据结构以及对应的关键算法技术的研究实现,完成了一套较为完整的森林火势蔓延趋势仿真和灭火演练系统。该系统具有灵活性高,仿真效率和效果较好,支持各种并行计算方法的特点,可以在相关行业和系统中广泛推广和使用。

A novel expended lattice structure of DEM-Cell model incorporating DEM elevation information is proposed,in response to the requirements of extrapolation of trends and hazards of forest fire spread,as well as the need of route selection and real-time path optimization for rescuers.Combining vegetation attributes of meta cells with geographic elevation information,we develop a simulation and fire fighting exercise system that computing the resultant data in real time and converting it into render-able resource,which is directly used by the OSG engines.With the help of the same data structure and the corresponding key algorithms and technologies,we implement a complete set of forest fire spread simulation and firefighting drill system.Our firefighting system features high flexibility,better simulation efficiency and effectiveness,and support for various parallel computing methods,which can be widely promoted and used in related industries and systems.