螺旋线画法

zdchl

新手，请问在用公式画线的时候
Click Insert > Model Datum > Curve or click the  button on the Datum toolbar.
Click From Equation and Done.
A curve creation dialog box open with the following elements:
Csys—Defines the coordinate system.
Csys Type—Specifies the type of the coordinate system.
Equation—Enters an equation.
Use options in the GET COORD S menu to create or select a coordinate system.
Use options in the SET CSYS TYP menu to specify the type of the coordinate system. The options are: Cartesian, Cylindrical, Spherical

这些坐标的类型和公式怎么输入？

谢谢！

zdchl

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