二次曲面的构造式方程

Constructive Equations of Quadratic Surfaces

本文根据二次曲面的中心点坐标、主轴方向、半轴长这几个几何参数直接构造曲面方程,并称之为二次曲面的构造式方程.

This paper constructs the surface equation directly based on the geometric parameters of a quadratic surface,which are the coordinates of the center,the direction of the principal axis,and the length of the semi-axis,and call this as the constructive equation of quadratic surface.