Abstract:  The traditional military symbols are based on 2D, the symbols are drawn on the plane and then placed on the 3D spheres, which makes it difficult to express complex relationships with obvious occlusion problems and low rendering performance and also cannot express spatial relationships. In this paper, the spherical subdivision curve and Bezier curve are used to modify the coordinate transformation in the traditional military symbol, and the method of drawing primitives on the sub-line is adopted. Sub-graphic elements are used to simulate real effects such as cyber attacks and electronic interference to improve visual recognition and the three-section Bezier curve is proved and calculated by the de Casteljau algorithm, which accelerates the calculation process of the primitives. The new military symbol can solve the problems of occlusion and spatial symbol, greatly improve the rendering efficiency of terrain symbols, and make the display of connection status more practical.

Key words: 3D symbol, three-segment Bezier, paste terrain display, communication situation