面向通信态势的三维标号生成

传统标绘以二维为基础，在平面上绘制标号再放到三维球上，使得表示复杂联系关系时，贴地存在明显遮挡问题且绘制性能低以及不同高度的空间联系难以表达。本文引入球面细分曲线和贝塞尔曲线，对传统标绘中坐标转换进行修改，采取分割出子线绘制图元的方法，利用子图元模拟网络攻击、电子干扰等真实效果提高视觉辨识，并由de Casteljau算法证明并计算得出三段贝塞尔曲线，加速图元计算过程。新生成的标号能够解决标号贴地遮挡和空间标绘的问题，大大提升贴地绘制效率，使得联系关系态势展示具备实用性。

#br# 3D Symbol Generation for Communication Situation

 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.