## GetNumberOfKnots

### Description

Gets the number of distinct knots on a curve. The multiplicity of a knot is not taken into account.
Note: This command uses output arguments. C# and some scripting languages (such as JScript, PerlScript and Python) don't support arguments passed by reference so you need to use the best workaround for your situation:
For scripting languages this command returns an ISIVTCollection which you can use to get the output arguments.
For C# you can use the XSIApplication.ExecuteCommand method to call this command. ExecuteCommand packs the output arguments into a C# System.Object containing an Array of the output arguments (see Calling Commands from C#).

### Scripting Syntax

    GetNumberOfKnots( InputObj, [NbItems] );

### Parameters

Parameter | Type | Description
--- | --- | ---
InputObj | String | Curve to evaluate.
NbItems | Integer | Returns the number of knots.

### Examples

#### VBScript Example

    'This example shows how to get the number of distinct knots from a curve

    newscene

    dim nbKnots

    'Create a standard spiral with 16 subdivisions.

    CreatePrim "Spiral", "NurbsCurve"

    ' Get the number of knots.

    GetNumberOfKnots "Spiral", nbKnots

    logmessage "Number of Knots: " & nbKnots

### See Also

GetCurveLength GetCurvePercentageAtKnotIndex EvaluateCurveAt