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EvaluateAtParameter Method (IPolyLine3D)

Gets the point on the 3D PolyLine that corresponds to the specified U parameter. Also gets the first and second derivatives at the point and the distance of the point from the start point.

.NET Syntax

Visual Basic (Declaration) 
Sub EvaluateAtParameter( _
   DOUBLE Parameter As System.Double, _
   DOUBLE* PointOnCurveX As System.Double, _
   DOUBLE* PointOnCurveY As System.Double, _
   DOUBLE* PointOnCurveZ As System.Double, _
   DOUBLE* Distance As System.Double, _
   VARIANT* FirstDerivativeDblArray As System.Object, _
   VARIANT* SecondDerivativeDblArray As System.Object _
)
C# 
void EvaluateAtParameter( 
   System.double Parameter,
   out System.double PointOnCurveX,
   out System.double PointOnCurveY,
   out System.double PointOnCurveZ,
   out System.double Distance,
   out System.object FirstDerivativeDblArray,
   out System.object SecondDerivativeDblArray
)
JavaScript 
EvaluateAtParameter( 
   Parameter : Number,




   FirstDerivativeDblArray : System.Object,
   SecondDerivativeDblArray : System.Object
) : {
   PointOnCurveX : Number,
   PointOnCurveY : Number,
   PointOnCurveZ : Number,
   Distance : Number
}
COM native C++ 
HRESULT EvaluateAtParameter( 
   double Parameter,
   double* PointOnCurveX,
   double* PointOnCurveY,
   double* PointOnCurveZ,
   double* Distance,
   VARIANT* FirstDerivativeDblArray,
   VARIANT* SecondDerivativeDblArray
)
C++ 
DSRESULT EvaluateAtParameter( 
   DOUBLE Parameter,
   DOUBLE* PointOnCurveX,
   DOUBLE* PointOnCurveY,
   DOUBLE* PointOnCurveZ,
   DOUBLE* Distance,
   VARIANT* FirstDerivativeDblArray,
   VARIANT* SecondDerivativeDblArray
)

Parameters

Parameter
U parameter on the 3D PolyLine
PointOnCurveX[out]

x coordinate of the point on the 3D PolyLine corresponding to the U parameter

PointOnCurveY[out]

y coordinate of the point on the 3D PolyLine corresponding to the U parameter

PointOnCurveZ[out]

z coordinate of the point on the 3D PolyLine corresponding to the U parameter

Distance[out]

Distance of the point from the start point

FirstDerivativeDblArray[out]

Array of doubles indicating the first derivative at the point

SecondDerivativeDblArray[out] or Return Value

Array of doubles indicating the second derivative at the point

 

See Also

Availability

DraftSight V1R1.3


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