## GetCurvePercentageAtKnotIndex

### Description

Get the percentage of the curve length at a given knot.
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

    GetCurvePercentageAtKnotIndex( InputObj, Index, [Percentage] );

### Parameters

Parameter | Type | Description
--- | --- | ---
InputObj | String | Curve to evaluate.
Index | Integer | Knot index. Knots are indexed starting at 0.
Percentage | Double | Returns the percentage of the curve length at the given knot.

### Examples

#### VBScript Example

    'This example shows how to get the percentage with respect to the length of a curve.

    newscene

    dim perc

    CreatePrim "Spiral", "NurbsCurve"

    'Get the percentage at the third knot (knot index = 2)

    GetCurvePercentageAtKnotIndex "Spiral", 2, perc

    logmessage "Percentage is: " & perc

### See Also

GetCurveLength GetNumberOfKnots EvaluateCurveAt