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 Standard_Integer Degree=3, const Standard_Integer NbPtsOnCur=15, const Standard_Integer NbIter=2, const Standard_Boolean Anisotropie=Standard_False, const Standard_Real Tol2d=0.00001, const Standard_Real Tol3d=0.0001, const Standard_Real TolAng=0.01, const Standard_Real TolCurv=0.1, const Standard_Integer MaxDeg=8, const Standard_Integer MaxSegments=9)
	Constructor.
void	SetConstrParam (const Standard_Real Tol2d=0.00001, const Standard_Real Tol3d=0.0001, const Standard_Real TolAng=0.01, const Standard_Real 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 Standard_Integer Degree=3, const Standard_Integer NbPtsOnCur=15, const Standard_Integer NbIter=2, const Standard_Boolean Anisotropie=Standard_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 Standard_Integer MaxDeg=8, const Standard_Integer 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.
Standard_Integer	Add (const TopoDS_Edge &anEdge, const GeomAbs_Shape Order, const Standard_Boolean IsBound=Standard_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.
Standard_Integer	Add (const TopoDS_Edge &anEdge, const TopoDS_Face &Support, const GeomAbs_Shape Order, const Standard_Boolean IsBound=Standard_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.
Standard_Integer	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.
Standard_Integer	Add (const gp_Pnt &Point)
	Adds a punctual constraint.
Standard_Integer	Add (const Standard_Real U, const Standard_Real V, const TopoDS_Face &Support, const GeomAbs_Shape Order)
	Adds a punctual constraint.
void	Build ()
	Builds the resulting faces.
Standard_Boolean	IsDone () const
TopoDS_Face	Face () const
const TopTools_ListOfShape &	Generated (const TopoDS_Shape &S)
	Returns the list of shapes generated from the shape .
Standard_Real	G0Error () const
Standard_Real	G1Error () const
Standard_Real	G2Error () const
Standard_Real	G0Error (const Standard_Integer Index)
Standard_Real	G1Error (const Standard_Integer Index)
Standard_Real	G2Error (const Standard_Integer 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 Standard_Integer	Degree = 3,
		const Standard_Integer	NbPtsOnCur = 15,
		const Standard_Integer	NbIter = 2,
		const Standard_Boolean	Anisotropie = Standard_False,
		const Standard_Real	Tol2d = 0.00001,
		const Standard_Real	Tol3d = 0.0001,
		const Standard_Real	TolAng = 0.01,
		const Standard_Real	TolCurv = 0.1,
		const Standard_Integer	MaxDeg = 8,
		const Standard_Integer	MaxSegments = 9 )

Constructor.

Member Function Documentation

Add() [1/5]

Standard_Integer BRepFill_Filling::Add

(

const gp_Pnt &

Point

)

Adds a punctual constraint.

Add() [2/5]

Standard_Integer BRepFill_Filling::Add	(	const Standard_Real	U,
		const Standard_Real	V,
		const TopoDS_Face &	Support,
		const GeomAbs_Shape	Order )

Adds a punctual constraint.

Add() [3/5]

Standard_Integer BRepFill_Filling::Add	(	const TopoDS_Edge &	anEdge,
		const GeomAbs_Shape	Order,
		const Standard_Boolean	IsBound = Standard_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]

Standard_Integer BRepFill_Filling::Add	(	const TopoDS_Edge &	anEdge,
		const TopoDS_Face &	Support,
		const GeomAbs_Shape	Order,
		const Standard_Boolean	IsBound = Standard_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]

Standard_Integer 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]

Standard_Real BRepFill_Filling::G0Error

(

)

const

G0Error() [2/2]

Standard_Real BRepFill_Filling::G0Error

(

const Standard_Integer

Index

)

G1Error() [1/2]

Standard_Real BRepFill_Filling::G1Error

(

)

const

G1Error() [2/2]

Standard_Real BRepFill_Filling::G1Error

(

const Standard_Integer

Index

)

G2Error() [1/2]

Standard_Real BRepFill_Filling::G2Error

(

)

const

G2Error() [2/2]

Standard_Real BRepFill_Filling::G2Error

(

const Standard_Integer

Index

)

Generated()

const TopTools_ListOfShape & BRepFill_Filling::Generated

(

const TopoDS_Shape &

S

)

Returns the list of shapes generated from the shape .

IsDone()

Standard_Boolean 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 Standard_Integer	MaxDeg = 8,
		const Standard_Integer	MaxSegments = 9 )

Sets the parameters used for approximation of the surface.

SetConstrParam()

void BRepFill_Filling::SetConstrParam	(	const Standard_Real	Tol2d = 0.00001,
		const Standard_Real	Tol3d = 0.0001,
		const Standard_Real	TolAng = 0.01,
		const Standard_Real	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 Standard_Integer	Degree = 3,
		const Standard_Integer	NbPtsOnCur = 15,
		const Standard_Integer	NbIter = 2,
		const Standard_Boolean	Anisotropie = Standard_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