Specifies the number of parameters to be evaluated.
Specifies the array of parameters to be evaluated.
Specifies the array of unit tangent vectors in the logical flow direction.
Description
Computes the unit-vector tangent at each of the points, given an array of parameter values on the curve.
Syntax
Visual Basic
Public Sub GetTangent( _
ByVal NumParams As Long, _
ByRef Params() As Double, _
ByRef Tangents() As Double _
)
Parameters
NumParams
Specifies the number of parameters to be evaluated.
Params
Specifies the array of parameters to be evaluated.
Tangents
Specifies the array of unit tangent vectors in the logical flow direction.
Remarks
The tangent is always pointed in the direction of the logical flow of the curve. If no inherent logical flow can be assigned (as in the case of an Edge shared by two Faces), the direction is the direction of increasing parameterization.
