NurbsGenerator.FindSpan Method

NurbsGenerator FindSpan Method

Virtual Photonics - VTS Library

Virtual Photonics

Searches for the knot span where the parametric point lies, with a classic binary search.If the point is larger then the last knot element returns the last span index to evaluate the value of a point on the edge of the surface, which is later used for derivative extrapolation. Adapted from algorithm 2.1 from 'The NURBS Book' page 68.

Namespace: Vts.Modeling.ForwardSolvers
Assembly: Vts (in Vts.dll) Version: 1.0.12.0 (1.0.12)

Syntax

C++

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public int FindSpan(
	NurbsValues nurbsValues,
	double parametricPoint
)

public int FindSpan(
	NurbsValues nurbsValues,
	double parametricPoint
)

Public Function FindSpan ( 
	nurbsValues As NurbsValues,
	parametricPoint As Double
) As Integer

Public Function FindSpan ( 
	nurbsValues As NurbsValues,
	parametricPoint As Double
) As Integer

public:
int FindSpan(
	NurbsValues^ nurbsValues, 
	double parametricPoint
)

public:
int FindSpan(
	NurbsValues^ nurbsValues, 
	double parametricPoint
)

Parameters

nurbsValues: Type: Vts.Modeling.ForwardSolvers NurbsValues
NurbsValues class which contains the knot,degree and control points

parametricPoint: Type: System Double
parametric point

Return Value

Type:

Int32
knot span where the parametric point belongs

Exceptions

Exception	Condition
System ArgumentException	Thrown when the input parametric point is negative