BRepFill_Filling Class Reference

N-Side Filling This algorithm avoids to build a face from: More...

#include <BRepFill_Filling.hxx>

Public Member Functions
	BRepFill_Filling (const int Degree=3, const int NbPtsOnCur=15, const int NbIter=2, const bool Anisotropie=false, const double Tol2d=0.00001, const double Tol3d=0.0001, const double TolAng=0.01, const double TolCurv=0.1, const int MaxDeg=8, const int MaxSegments=9)
	Constructor.
void	SetConstrParam (const double Tol2d=0.00001, const double Tol3d=0.0001, const double TolAng=0.01, const double TolCurv=0.1)
	Sets the values of Tolerances used to control the constraint. Tol2d: Tol3d: it is the maximum distance allowed between the support surface and the constraints TolAng: it is the maximum angle allowed between the normal of the surface and the constraints TolCurv: it is the maximum difference of curvature allowed between the surface and the constraint.
void	SetResolParam (const int Degree=3, const int NbPtsOnCur=15, const int NbIter=2, const bool Anisotropie=false)
	Sets the parameters used for resolution. The default values of these parameters have been chosen for a good ratio quality/performance. Degree: it is the order of energy criterion to minimize for computing the deformation of the surface. The default value is 3 The recommended value is i+2 where i is the maximum order of the constraints. NbPtsOnCur: it is the average number of points for discretisation of the edges. NbIter: it is the maximum number of iterations of the process. For each iteration the number of discretisation points is increased. Anisotropie:
void	SetApproxParam (const int MaxDeg=8, const int MaxSegments=9)
	Sets the parameters used for approximation of the surface.
void	LoadInitSurface (const TopoDS_Face &aFace)
	Loads the initial Surface The initial surface must have orthogonal local coordinates, i.e. partial derivatives dS/du and dS/dv must be orthogonal at each point of surface. If this condition breaks, distortions of resulting surface are possible.
int	Add (const TopoDS_Edge &anEdge, const GeomAbs_Shape Order, const bool IsBound=true)
	Adds a new constraint which also defines an edge of the wire of the face Order: Order of the constraint: GeomAbs_C0 : the surface has to pass by 3D representation of the edge GeomAbs_G1 : the surface has to pass by 3D representation of the edge and to respect tangency with the first face of the edge GeomAbs_G2 : the surface has to pass by 3D representation of the edge and to respect tangency and curvature with the first face of the edge.
int	Add (const TopoDS_Edge &anEdge, const TopoDS_Face &Support, const GeomAbs_Shape Order, const bool IsBound=true)
	Adds a new constraint which also defines an edge of the wire of the face Order: Order of the constraint: GeomAbs_C0 : the surface has to pass by 3D representation of the edge GeomAbs_G1 : the surface has to pass by 3D representation of the edge and to respect tangency with the given face GeomAbs_G2 : the surface has to pass by 3D representation of the edge and to respect tangency and curvature with the given face.
int	Add (const TopoDS_Face &Support, const GeomAbs_Shape Order)
	Adds a free constraint on a face. The corresponding edge has to be automatically recomputed. It is always a bound.
int	Add (const gp_Pnt &Point)
	Adds a punctual constraint.
int	Add (const double U, const double V, const TopoDS_Face &Support, const GeomAbs_Shape Order)
	Adds a punctual constraint.
void	Build ()
	Builds the resulting faces.
bool	IsDone () const
TopoDS_Face	Face () const
const NCollection_List< TopoDS_Shape > &	Generated (const TopoDS_Shape &S)
	Returns the list of shapes generated from the shape .
double	G0Error () const
double	G1Error () const
double	G2Error () const
double	G0Error (const int Index)
double	G1Error (const int Index)
double	G2Error (const int Index)

Detailed Description

N-Side Filling This algorithm avoids to build a face from:

• a set of edges defining the bounds of the face and some constraints the surface support has to satisfy
• a set of edges and points defining some constraints the support surface has to satisfy
• an initial surface to deform for satisfying the constraints
• a set of parameters to control the constraints.

The support surface of the face is computed by deformation of the initial surface in order to satisfy the given constraints. The set of bounding edges defines the wire of the face.

If no initial surface is given, the algorithm computes it automatically. If the set of edges is not connected (Free constraint) missing edges are automatically computed.

Limitations:

• If some constraints are not compatible The algorithm does not take them into account. So the constraints will not be satisfied in an area containing the incompatibilities.
• The constraints defining the bound of the face have to be entered in order to have a continuous wire.

Other Applications:

• Deformation of a face to satisfy internal constraints
• Deformation of a face to improve Gi continuity with connected faces

Constructor & Destructor Documentation

BRepFill_Filling()

BRepFill_Filling::BRepFill_Filling	(	const int	Degree = 3,
		const int	NbPtsOnCur = 15,
		const int	NbIter = 2,
		const bool	Anisotropie = false,
		const double	Tol2d = 0.00001,
		const double	Tol3d = 0.0001,
		const double	TolAng = 0.01,
		const double	TolCurv = 0.1,
		const int	MaxDeg = 8,
		const int	MaxSegments = 9 )

Constructor.

Member Function Documentation

Add() [1/5]

int BRepFill_Filling::Add	(	const double	U,
		const double	V,
		const TopoDS_Face &	Support,
		const GeomAbs_Shape	Order )

Adds a punctual constraint.

Add() [2/5]

int BRepFill_Filling::Add

(

const gp_Pnt &

Point

)

Adds a punctual constraint.

Add() [3/5]

int BRepFill_Filling::Add	(	const TopoDS_Edge &	anEdge,
		const GeomAbs_Shape	Order,
		const bool	IsBound = true )

Adds a new constraint which also defines an edge of the wire of the face Order: Order of the constraint: GeomAbs_C0 : the surface has to pass by 3D representation of the edge GeomAbs_G1 : the surface has to pass by 3D representation of the edge and to respect tangency with the first face of the edge GeomAbs_G2 : the surface has to pass by 3D representation of the edge and to respect tangency and curvature with the first face of the edge.

Add() [4/5]

int BRepFill_Filling::Add	(	const TopoDS_Edge &	anEdge,
		const TopoDS_Face &	Support,
		const GeomAbs_Shape	Order,
		const bool	IsBound = true )

Adds a new constraint which also defines an edge of the wire of the face Order: Order of the constraint: GeomAbs_C0 : the surface has to pass by 3D representation of the edge GeomAbs_G1 : the surface has to pass by 3D representation of the edge and to respect tangency with the given face GeomAbs_G2 : the surface has to pass by 3D representation of the edge and to respect tangency and curvature with the given face.

Add() [5/5]

int BRepFill_Filling::Add	(	const TopoDS_Face &	Support,
		const GeomAbs_Shape	Order )

Adds a free constraint on a face. The corresponding edge has to be automatically recomputed. It is always a bound.

Build()

void BRepFill_Filling::Build

(

)

Builds the resulting faces.

Face()

TopoDS_Face BRepFill_Filling::Face

(

)

const

G0Error() [1/2]

double BRepFill_Filling::G0Error

(

)

const

G0Error() [2/2]

double BRepFill_Filling::G0Error

(

const int

Index

)

G1Error() [1/2]

double BRepFill_Filling::G1Error

(

)

const

G1Error() [2/2]

double BRepFill_Filling::G1Error

(

const int

Index

)

G2Error() [1/2]

double BRepFill_Filling::G2Error

(

)

const

G2Error() [2/2]

double BRepFill_Filling::G2Error

(

const int

Index

)

Generated()

const NCollection_List< TopoDS_Shape > & BRepFill_Filling::Generated

(

const TopoDS_Shape &

S

)

Returns the list of shapes generated from the shape .

IsDone()

bool BRepFill_Filling::IsDone

(

)

const

LoadInitSurface()

void BRepFill_Filling::LoadInitSurface

(

const TopoDS_Face &

aFace

)

Loads the initial Surface The initial surface must have orthogonal local coordinates, i.e. partial derivatives dS/du and dS/dv must be orthogonal at each point of surface. If this condition breaks, distortions of resulting surface are possible.

SetApproxParam()

void BRepFill_Filling::SetApproxParam	(	const int	MaxDeg = 8,
		const int	MaxSegments = 9 )

Sets the parameters used for approximation of the surface.

SetConstrParam()

void BRepFill_Filling::SetConstrParam	(	const double	Tol2d = 0.00001,
		const double	Tol3d = 0.0001,
		const double	TolAng = 0.01,
		const double	TolCurv = 0.1 )

Sets the values of Tolerances used to control the constraint. Tol2d: Tol3d: it is the maximum distance allowed between the support surface and the constraints TolAng: it is the maximum angle allowed between the normal of the surface and the constraints TolCurv: it is the maximum difference of curvature allowed between the surface and the constraint.

SetResolParam()

void BRepFill_Filling::SetResolParam	(	const int	Degree = 3,
		const int	NbPtsOnCur = 15,
		const int	NbIter = 2,
		const bool	Anisotropie = false )

Sets the parameters used for resolution. The default values of these parameters have been chosen for a good ratio quality/performance. Degree: it is the order of energy criterion to minimize for computing the deformation of the surface. The default value is 3 The recommended value is i+2 where i is the maximum order of the constraints. NbPtsOnCur: it is the average number of points for discretisation of the edges. NbIter: it is the maximum number of iterations of the process. For each iteration the number of discretisation points is increased. Anisotropie:

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

• BRepFill_Filling.hxx