Evaluate(Double,Double,Int32) Method

In This Topic

Computes the surface derivatives at parametric values [u,v].

Syntax

Visual Basic
C#

'Declaration
 
Public Overloads Overridable Function Evaluate( _
   ByVal u As Double, _
   ByVal v As Double, _
   ByVal d As Integer _
) As Vector3D(,)

public virtual Vector3D[,] Evaluate( 
   double u,
   double v,
   int d
)

Parameters

u: Parametric value along U direction
v: Parametric value along V direction
d: The degree of the derivatives

Example

The following code fragment demonstrates how to compute the first 2 derivatives of the surface at the parametric value [0.25, 0.5].

Vector3D[0:,0:] SKL = mySurf.Evaluate(0.25, 2);
 
Vector3D S   = SKL[0,0];
Vector3D Su  = SKL[1,0];
Vector3D Sv  = SKL[0,1];
Vector3D Suu = SKL[2,0];
Vector3D Suv = SKL[1,1];
Vector3D Svv = SKL[0,2];

Visual Basic

Dim SKL(,) As Vector3D = MySurf.Evaluate(0.25, 0.5, 2)
 
Dim S As Vector3D = SKL(0,0)
Dim Su As Vector3D = SKL(1,0)
Dim Sv As Vector3D = SKL(0,1)
Dim Suu As Vector3D = SKL(2,0)
Dim Suv As Vector3D = SKL(1,1)
Dim Svv As Vector3D = SKL(0,2)

Reference

Surface Class
Surface Members
Overload List

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