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在《空间解析几何》的二次曲面部分,对予以任意空间曲线为准线,以任意方向为母线方向的柱面;以任意空间曲线为准线,以任意点为顶点的锥而方程的求法,在一般教材中,采用以准线上任一点P_1(x_1y_1z_1)中的x_1,y_1,z_1为参数,由过P_1的母线上任一点P(x,y,z)与P_1的线性关系式消掉x_1,y_1,z_1而得到曲面方程的方法。由于参
In the quadratic surface part of “Spatial Analytic Geometry”, for any cylinder with the arbitrary spatial curve as the guideline and the arbitrary direction as the generatrix direction, the method of solving the equation with arbitrary space curve as the guideline and the vertex at arbitrary point , In the general textbook, by taking the x_1, y_1, z_1 of any point P_1 (x_1y_1z_1) on the quasi-line as parameter, the linear relation of P (x, y, z) , y_1, z_1 and get the surface equation method. Due to participation