HelixGeom_Tools Class Reference

Static utility class providing approximation algorithms for helix curves. More...

#include <HelixGeom_Tools.hxx>

Static Public Member Functions
static int	ApprHelix (const double aT1, const double aT2, const double aPitch, const double aRStart, const double aTaperAngle, const bool aIsCW, const double aTol, occ::handle< Geom_BSplineCurve > &theBSpl, double &theMaxError)
	Approximates a parametric helix curve using B-spline representation.
static int	ApprCurve3D (const occ::handle< Adaptor3d_Curve > &theHC, const double theTol, const GeomAbs_Shape theCont, const int theMaxSeg, const int theMaxDeg, occ::handle< Geom_BSplineCurve > &theBSpl, double &theMaxError)
	Approximates a generic 3D curve using B-spline representation.

Detailed Description

Static utility class providing approximation algorithms for helix curves.

This class contains static methods for:

• Converting analytical helix curves to B-spline approximations
• Generic curve approximation with specified tolerances and continuity
• High-quality approximation suitable for CAD/CAM applications

The approximation algorithms use advanced techniques to ensure:

• Accurate representation within specified tolerances
• Smooth continuity (C0, C1, C2) as required
• Efficient B-spline parameterization
• Robust handling of edge cases

Member Function Documentation

ApprCurve3D()

static int HelixGeom_Tools::ApprCurve3D ( const occ::handle< Adaptor3d_Curve > & theHC, const double theTol, const GeomAbs_Shape theCont, const int theMaxSeg, const int theMaxDeg, occ::handle< Geom_BSplineCurve > & theBSpl, double & theMaxError )

static

Approximates a generic 3D curve using B-spline representation.

Parameters

theHC	[in] Handle to the curve adaptor to approximate
theTol	[in] Approximation tolerance
theCont	[in] Required continuity (C0, C1, C2)
theMaxSeg	[in] Maximum number of curve segments
theMaxDeg	[in] Maximum degree of B-spline curve
theBSpl	[out] Resulting B-spline curve
theMaxError	[out] Maximum approximation error achieved

Returns

0 on success, error code otherwise

ApprHelix()

static int HelixGeom_Tools::ApprHelix ( const double aT1, const double aT2, const double aPitch, const double aRStart, const double aTaperAngle, const bool aIsCW, const double aTol, occ::handle< Geom_BSplineCurve > & theBSpl, double & theMaxError )

static

Approximates a parametric helix curve using B-spline representation.

Parameters

aT1	[in] Start parameter (angular position in radians)
aT2	[in] End parameter (angular position in radians)
aPitch	[in] Helix pitch (vertical distance per 2*PI radians)
aRStart	[in] Starting radius at parameter aT1
aTaperAngle	[in] Taper angle in radians (0 = cylindrical helix)
aIsCW	[in] True for clockwise, false for counter-clockwise
aTol	[in] Approximation tolerance
theBSpl	[out] Resulting B-spline curve
theMaxError	[out] Maximum approximation error achieved

Returns

0 on success, error code otherwise

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

• HelixGeom_Tools.hxx