考虑地形遮蔽影响的电磁传播算法与可视化研究

摘要

采用规则格网数据（DEM ）建立虚拟地理环境，并设定研究平面和电磁设备的空间位置，通过三角图元求交算法确定电磁波与地形是否存在遮蔽情况，从而计算得到受地形遮蔽影响的电磁场数据；采用颜色混合技术和优化处理的体绘制技术，将抽象的电磁场数据映射到可见的不同颜色值，形成直观、形象的可视化效果。%The regular grid data are used to create a virtual geographic environment and the spatial position of the plane and the electromagnetic devices are set .T hrough the triangle primitive intersection algorithm , the existence of electromagnetic shielding is determined and the electromagnetic data are calculated .The color blending technology and optimizing volume rendering technology are used to map the abstract electromagnetic data into different color values ,so the intuitive visualization can be realized .