代码包含以下算法：三叶梅花线,圆柱螺线,圆锥螺线,三次贝塞尔曲线,三次B样条曲线。 环形面,锥面,双线性曲面,旋转曲面,贝塞尔曲面,B样条曲面。(The code contains the following algorithms: three-leaf plum blossom line, cylindrical spiral, conical spiral, cubic Bezier curve, cubic B-spline curve. Torus, cone, bilinear sur