An algorithm for constructing a BSpline surface filled from a series of boundaries which serve as path constraints and optionally, as tangency constraints. The algorithm accepts three or four curves as the boundaries of the target surface. The only FillingStyle used is Coons. A ConstrainedFilling object provides a framework for: More...

#include <GeomFill_ConstrainedFilling.hxx>

Public Member Functions
	GeomFill_ConstrainedFilling (const int MaxDeg, const int MaxSeg)
	Constructs an empty framework for filling a surface from boundaries. The boundaries of the surface will be defined, and the surface will be built by using the function Init. The surface will respect the following constraints:

void	Init (const occ::handle< GeomFill_Boundary > &B1, const occ::handle< GeomFill_Boundary > &B2, const occ::handle< GeomFill_Boundary > &B3, const bool NoCheck=false)

void	Init (const occ::handle< GeomFill_Boundary > &B1, const occ::handle< GeomFill_Boundary > &B2, const occ::handle< GeomFill_Boundary > &B3, const occ::handle< GeomFill_Boundary > &B4, const bool NoCheck=false)
	Constructs a BSpline surface filled from the series of boundaries B1, B2, B3 and, if need be, B4, which serve:

void	SetDomain (const double l, const occ::handle< GeomFill_BoundWithSurf > &B)
	Allows to modify domain on which the blending function associated to the constrained boundary B will propag the influence of the field of tangency. Can be useful to reduce influence of boundaries on which the Coons compatibility conditions are not respected. l is a relative value of the parametric range of B. Default value for l is 1 (used in Init). Warning: Must be called after Init with a constrained boundary used in the call to Init.

void	ReBuild ()
	Computes the new poles of the surface using the new blending functions set by several calls to SetDomain.

occ::handle< GeomFill_Boundary >	Boundary (const int I) const
	Returns the bound of index i after sort.

occ::handle< Geom_BSplineSurface >	Surface () const
	Returns the BSpline surface after computation of the fill by this framework.

int	Eval (const double W, const int Ord, double &Result) const
	Internal use for Advmath approximation call.

void	CheckCoonsAlgPatch (const int I)
	Computes the fields of tangents on 30 points along the bound I, these are not the constraint tangents but gives an idea of the coonsAlgPatch regularity.

void	CheckTgteField (const int I)
	Computes the fields of tangents and normals on 30 points along the bound I, draw them, and computes the max dot product that must be near than 0.

void	CheckApprox (const int I)
	Computes values and normals along the bound I and compare them to the approx result curves (bound and tgte field) , draw the normals and tangents.

void	CheckResult (const int I)
	Computes values and normals along the bound I on both constraint surface and result surface, draw the normals, and computes the max distance between values and the max angle between normals.

Detailed Description

An algorithm for constructing a BSpline surface filled from a series of boundaries which serve as path constraints and optionally, as tangency constraints. The algorithm accepts three or four curves as the boundaries of the target surface. The only FillingStyle used is Coons. A ConstrainedFilling object provides a framework for:

defining the boundaries of the surface
implementing the construction algorithm
consulting the result. Warning This surface filling algorithm is specifically designed to be used in connection with fillets. Satisfactory results cannot be guaranteed for other uses.

Constructor & Destructor Documentation

◆ GeomFill_ConstrainedFilling()

GeomFill_ConstrainedFilling::GeomFill_ConstrainedFilling	(	const int	MaxDeg,
		const int	MaxSeg )

Constructs an empty framework for filling a surface from boundaries. The boundaries of the surface will be defined, and the surface will be built by using the function Init. The surface will respect the following constraints:

its degree will not be greater than MaxDeg
the maximum number of segments MaxSeg which BSpline surfaces can have.

Member Function Documentation

◆ Boundary()

occ::handle< GeomFill_Boundary > GeomFill_ConstrainedFilling::Boundary ( const int I ) const

Returns the bound of index i after sort.

◆ CheckApprox()

void GeomFill_ConstrainedFilling::CheckApprox ( const int I )

Computes values and normals along the bound I and compare them to the approx result curves (bound and tgte field) , draw the normals and tangents.

◆ CheckCoonsAlgPatch()

void GeomFill_ConstrainedFilling::CheckCoonsAlgPatch ( const int I )

Computes the fields of tangents on 30 points along the bound I, these are not the constraint tangents but gives an idea of the coonsAlgPatch regularity.

◆ CheckResult()

void GeomFill_ConstrainedFilling::CheckResult ( const int I )

Computes values and normals along the bound I on both constraint surface and result surface, draw the normals, and computes the max distance between values and the max angle between normals.

◆ CheckTgteField()

void GeomFill_ConstrainedFilling::CheckTgteField ( const int I )

Computes the fields of tangents and normals on 30 points along the bound I, draw them, and computes the max dot product that must be near than 0.

◆ Eval()

int GeomFill_ConstrainedFilling::Eval	(	const double	W,
		const int	Ord,
		double &	Result ) const

Internal use for Advmath approximation call.

◆ Init() [1/2]

void GeomFill_ConstrainedFilling::Init	(	const occ::handle< GeomFill_Boundary > &	B1,
		const occ::handle< GeomFill_Boundary > &	B2,
		const occ::handle< GeomFill_Boundary > &	B3,
		const bool	NoCheck = false )

◆ Init() [2/2]

void GeomFill_ConstrainedFilling::Init	(	const occ::handle< GeomFill_Boundary > &	B1,
		const occ::handle< GeomFill_Boundary > &	B2,
		const occ::handle< GeomFill_Boundary > &	B3,
		const occ::handle< GeomFill_Boundary > &	B4,
		const bool	NoCheck = false )

Constructs a BSpline surface filled from the series of boundaries B1, B2, B3 and, if need be, B4, which serve:

as path constraints
and optionally, as tangency constraints if they are GeomFill_BoundWithSurf curves. The boundaries may be given in any order: they are classified and if necessary, reversed and reparameterized. The surface will also respect the following constraints:
its degree will not be greater than the maximum degree defined at the time of construction of this framework, and
the maximum number of segments MaxSeg which BSpline surfaces can have

◆ ReBuild()

void GeomFill_ConstrainedFilling::ReBuild ( )

Computes the new poles of the surface using the new blending functions set by several calls to SetDomain.

◆ SetDomain()

void GeomFill_ConstrainedFilling::SetDomain	(	const double	l,
		const occ::handle< GeomFill_BoundWithSurf > &	B )

Allows to modify domain on which the blending function associated to the constrained boundary B will propag the influence of the field of tangency. Can be useful to reduce influence of boundaries on which the Coons compatibility conditions are not respected. l is a relative value of the parametric range of B. Default value for l is 1 (used in Init). Warning: Must be called after Init with a constrained boundary used in the call to Init.

◆ Surface()

occ::handle< Geom_BSplineSurface > GeomFill_ConstrainedFilling::Surface ( ) const

Returns the BSpline surface after computation of the fill by this framework.

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

GeomFill_ConstrainedFilling.hxx

Public Member Functions