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Surface Partial Derivative with Respect to the U Parameter

Synopsis

SDDUF(obj,u,v)

Description

Returns the components of a vector which represent the surface partial derivative with respect to the U parameter. The vector components are determined at a position on the surface specified by the U and V parameters. The U and V parameters are scalar values representing percentages of the surface in the respective direction. Detailed explanations of how the u and v values apply to the various surfaces, are given in the SPOSF function.

All Unigraphics surfaces are valid for the SDDUF function:

Parameters

Parameter	Description
obj	An existing surface which is used to calculate the partial derivative.
u,v	Scalar values which can be any Unigraphics real number which define the location of the derivative calculation in U and V parameter space. The scalar values located on the surface are from 0 to 1. Any value beyond that range lies on the extensions of the surface.