GeomGridEval_BSplineCurve Class Reference

Efficient batch evaluator for B-spline curve grid points. More...

#include <GeomGridEval_BSplineCurve.hxx>

Public Member Functions
	GeomGridEval_BSplineCurve (const occ::handle< Geom_BSplineCurve > &theCurve)
	Constructor with geometry.
	GeomGridEval_BSplineCurve (const GeomGridEval_BSplineCurve &)=delete
	Non-copyable and non-movable.
GeomGridEval_BSplineCurve &	operator= (const GeomGridEval_BSplineCurve &)=delete
	GeomGridEval_BSplineCurve (GeomGridEval_BSplineCurve &&)=delete
GeomGridEval_BSplineCurve &	operator= (GeomGridEval_BSplineCurve &&)=delete
const occ::handle< Geom_BSplineCurve > &	Geometry () const
	Returns the geometry handle.
NCollection_Array1< gp_Pnt >	EvaluateGrid (const NCollection_Array1< double > &theParams) const
	Evaluate all grid points. Points are evaluated in span-grouped order to minimize cache rebuilds.
NCollection_Array1< GeomGridEval::CurveD1 >	EvaluateGridD1 (const NCollection_Array1< double > &theParams) const
	Evaluate all grid points with first derivative.
NCollection_Array1< GeomGridEval::CurveD2 >	EvaluateGridD2 (const NCollection_Array1< double > &theParams) const
	Evaluate all grid points with first and second derivatives.
NCollection_Array1< GeomGridEval::CurveD3 >	EvaluateGridD3 (const NCollection_Array1< double > &theParams) const
	Evaluate all grid points with first, second, and third derivatives.
NCollection_Array1< gp_Vec >	EvaluateGridDN (const NCollection_Array1< double > &theParams, int theN) const
	Evaluate Nth derivative at all grid points. For orders 1-3, reuses EvaluateGridD1/D2/D3. For orders > 3, uses geometry DN method.

Detailed Description

Efficient batch evaluator for B-spline curve grid points.

Optimizes evaluation of multiple points on a B-spline curve by:

• Pre-computing span indices for input parameters (no runtime binary search)
• Pre-grouping parameters by span for cache-optimal iteration
• Rebuilding cache only once per span block (not per point)
• Using KnotSequence() from Geom_BSplineCurve for direct flat knot access

Usage:

GeomGridEval_BSplineCurve anEvaluator(myBSplineCurve);
NCollection_Array1<gp_Pnt> aGrid = anEvaluator.EvaluateGrid(myParams);

Constructor & Destructor Documentation

GeomGridEval_BSplineCurve() [1/3]

GeomGridEval_BSplineCurve::GeomGridEval_BSplineCurve ( const occ::handle< Geom_BSplineCurve > & theCurve )

inline

Constructor with geometry.

Parameters

theCurve

the B-spline curve to evaluate

GeomGridEval_BSplineCurve() [2/3]

GeomGridEval_BSplineCurve::GeomGridEval_BSplineCurve ( const GeomGridEval_BSplineCurve & )

delete

Non-copyable and non-movable.

GeomGridEval_BSplineCurve() [3/3]

GeomGridEval_BSplineCurve::GeomGridEval_BSplineCurve ( GeomGridEval_BSplineCurve && )

delete

Member Function Documentation

EvaluateGrid()

NCollection_Array1< gp_Pnt > GeomGridEval_BSplineCurve::EvaluateGrid

(

const NCollection_Array1< double > &

theParams

)

const

Evaluate all grid points. Points are evaluated in span-grouped order to minimize cache rebuilds.

Parameters

theParams

array of parameter values

Returns

array of evaluated points (1-based indexing), or empty array if geometry is null or no parameters

EvaluateGridD1()

NCollection_Array1< GeomGridEval::CurveD1 > GeomGridEval_BSplineCurve::EvaluateGridD1

(

const NCollection_Array1< double > &

theParams

)

const

Evaluate all grid points with first derivative.

Parameters

theParams

array of parameter values

Returns

array of CurveD1 (1-based indexing), or empty array if geometry is null or no parameters

EvaluateGridD2()

NCollection_Array1< GeomGridEval::CurveD2 > GeomGridEval_BSplineCurve::EvaluateGridD2

(

const NCollection_Array1< double > &

theParams

)

const

Evaluate all grid points with first and second derivatives.

Parameters

theParams

array of parameter values

Returns

array of CurveD2 (1-based indexing), or empty array if geometry is null or no parameters

EvaluateGridD3()

NCollection_Array1< GeomGridEval::CurveD3 > GeomGridEval_BSplineCurve::EvaluateGridD3

(

const NCollection_Array1< double > &

theParams

)

const

Evaluate all grid points with first, second, and third derivatives.

Parameters

theParams

array of parameter values

Returns

array of CurveD3 (1-based indexing), or empty array if geometry is null or no parameters

EvaluateGridDN()

NCollection_Array1< gp_Vec > GeomGridEval_BSplineCurve::EvaluateGridDN	(	const NCollection_Array1< double > &	theParams,
		int	theN ) const

Evaluate Nth derivative at all grid points. For orders 1-3, reuses EvaluateGridD1/D2/D3. For orders > 3, uses geometry DN method.

Parameters

theParams	array of parameter values
theN	derivative order (N >= 1)

Returns

array of derivative vectors (1-based indexing)

Geometry()

const occ::handle< Geom_BSplineCurve > & GeomGridEval_BSplineCurve::Geometry ( ) const

inline

Returns the geometry handle.

operator=() [1/2]

GeomGridEval_BSplineCurve & GeomGridEval_BSplineCurve::operator= ( const GeomGridEval_BSplineCurve & )

delete

operator=() [2/2]

GeomGridEval_BSplineCurve & GeomGridEval_BSplineCurve::operator= ( GeomGridEval_BSplineCurve && )

delete

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The documentation for this class was generated from the following file:

• GeomGridEval_BSplineCurve.hxx