OdGePointOnSurface::tangentVector Method (OdGeVector2d&, OdGeSurface&, OdGePoint2d&)

Syntax

C++

OdGeVector3d tangentVector(const OdGeVector2d& vect, const OdGeSurface& surface, const OdGePoint2d& param);

Parameters	Description
const OdGeVector2d& vect	[in] Any 2D vector.
const OdGeSurface& surface	[in] Any surface.
const OdGePoint2d& param	[in] Parameter to specify a point on surface.

Maps the specified vector to the tangent plane of the surface at the point corresponding to the parameter

Specifying surface or param updates the underlying value.

The tangent vector is mapped as follows:

tangentVector = uDeriv(1) * vect.x + vDeriv(1) * vect.y

Currently not implemented.