标题: 【求助】曲线方程 [打印本页] 作者: fuyun12345 时间: 2003-1-19 17:08
提示: 作者被禁止或删除 内容自动屏蔽作者: fuyun12345 时间: 2003-1-19 17:13
提示: 作者被禁止或删除 内容自动屏蔽作者: jmswl 时间: 2003-1-19 22:17
利用方程式:
1、 首先建立缺省的datum plan,coordinate system
2、 建立datum curve ,选择 from equation
3、 选择coordinate system, 圆柱坐标(cylindrical)
此时出现下列信息:
/* For cylindrical coordinate system, enter parametric equation
/* in terms of t (which will vary from 0 to 1) for r, theta and z
/* For example: for a circle in x-y plane, centered at origin
/* and radius = 4, the parametric equations will be:
/* r = 4
/* theta = t * 360
/* z = 0
/*-------------------------------------------------------------------
其中螺旋线的方程式为:
r = minimum radius of helix + t * (major radius of helix - minimum radius of helix)
theta = t * (pitch of helix * 360 * leading angle (if any)
z = desired height + t