参数曲线的位置

Synopsis

num = CPARF/obj,{point|x,y,z}

Description

Returns the parameter value along a curve nearest to the specified point or coordinates. If the point is not on the curve, the position is calculated by projecting the point, normal to the curve, onto the curve. If this projection cannot reach the curve, the parameter at the end of the curve closest to the point is returned.

Parameters

Parameter

Description

obj

An existing object along which the position is calculated. The object may be a line, an arc, a conic or a spline.

point

An existing point near the curve which defines the desired position.

x,y,z

Three numerical values or a three-position numerical array which represents the coordinates, in the WCS, of the point near the curve which defines the desired position.

Parameter	Description
obj	An existing object along which the position is calculated. The object may be a line, an arc, a conic or a spline.
point	An existing point near the curve which defines the desired position.
x,y,z	Three numerical values or a three-position numerical array which represents the coordinates, in the WCS, of the point near the curve which defines the desired position.