Conic is one of basic elements in reconstructing a model because of its good geometric characters, low order and flexible parameters. It plays an important role in the area of computer graphics and CAGD.

• 二次曲线由于有着良好的几何特性、较低的次数及灵活的控制参数,成为基本的体素模型之一,在计算机图形学和计算机辅助几何设计等领域中起着重要的作用。