在面上点的U，V参数

Synopsis

SPARF/obj,{point|X,Y,Z},u,v

Description

Returns the U and V surface parameters of a point on a surface which has the closest distance to a given point. If the point is on the surface, the u and v parameters are those of the point. The output from this function may subsequently be used as input to either the surface position function, SPOSF, or the surface normal function, SNORF.

All Unigraphics surfaces are valid for SPARF and SPOSF.

Parameters

Parameter

Description

obj

A previously defined surface.

point

A previously defined point which is used to calculate the position from which the U and V parameters are returned.

X,Y,Z

The X, Y, and Z coordinates of a point which is used to calculate the position from which the U and V parameters are returned.

u,v

Variables which are assigned the u and v values returned. These values may be used later in the program by referring to the variables.

Parameter	Description
obj	A previously defined surface.
point	A previously defined point which is used to calculate the position from which the U and V parameters are returned.
X,Y,Z	The X, Y, and Z coordinates of a point which is used to calculate the position from which the U and V parameters are returned.
u,v	Variables which are assigned the u and v values returned. These values may be used later in the program by referring to the variables.