Function IGetSplinePtsSize( _
   ByRef PropArray As Integer, _
   ByRef KnotsArray As Double, _
   ByRef CntrlPntCoordArray As Double _
) As Integer

Dim instance As ICurve
Dim PropArray As Integer
Dim KnotsArray As Double
Dim CntrlPntCoordArray As Double
Dim value As Integer
 
value = instance.IGetSplinePtsSize(PropArray, KnotsArray, CntrlPntCoordArray)

int IGetSplinePtsSize( 
   ref int PropArray,
   ref double KnotsArray,
   ref double CntrlPntCoordArray
)

int IGetSplinePtsSize( 
&   int% PropArray,
&   double% KnotsArray,
&   double% CntrlPntCoordArray
) 

Parameters

PropArray

Array that includes dimension, order, number of control points, and periodicity

KnotsArray

knot1, knot2, ..., knotn

CntrlPntCoordArray

controlpoint1[dimension], controlpoint2[dimension], ...,  controlpointn[dimension]

Return Value

Size of the data set returned by ICurve::IGetSplinePts

PropArray contains 4 integers:

• Dimension
• Order
• Number of control points
• Periodicity ( True or false )

KnotsArray is an array of doubles with (Number of control points + Order) elements.

The size of the CntrlPntCoordArray array is based on the curve dimension.

• Dimension = 2 then each control point is an array of 2 doubles ( u, v )
• Dimension = 3 then each control point is an array of 3 doubles ( x, y, z)
• Dimension = 4 then each control point is an array of 4 doubles ( x, y, z, w ) where w = weight

Data passed into this method must satisfy the following requirements:

• If the curve is periodic, it must not have any repeated knots.
• If the curve is non-periodic, it must only have repeated knots at its ends.
• The curve must be cubic or lower degree, non-rational and have continuous first and second derivatives.

NOTE: For a linear or quadratic curve to satisfy these continuity requirements, it
must consist of a single segment.