为了实现反舰导弹的大空域变轨，提出了一种三维虚拟目标比例导引律。该导引律利用简单的控制指令就能控制导弹完成复杂的大空域变轨。
In order to realize large airspace transfer orbital trajectory of an anti-ship missile, a 3-dimensional virtual target's proportional navigation guidance (PNG) law is proposed.
针对虚拟仿真应用程序开发中的二维圆形区域与三维实体模型的融合显示问题，提出了一种简便的解决方案，即用聚光光源产生的光斑来模拟二维圆形区域在三维目标模型上的影印效果。
For the question of fusing display of circular area on 3d model, a simple solution was put out, that used a spot light source to simulate the fusing effect of circular area display on 3d model.
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