BRepOffsetAPI_MakeFilling Class Reference

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

#include <BRepOffsetAPI_MakeFilling.hxx>

Inheritance diagram for BRepOffsetAPI_MakeFilling:

Public Member Functions
	BRepOffsetAPI_MakeFilling (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)
	Constructs a wire filling object defined by.
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 to approximate the filling surface. These include:
void	LoadInitSurface (const TopoDS_Face &Surf)
	Loads the initial surface Surf to begin the construction of the surface. This optional function is useful if the surface resulting from construction for the algorithm is likely to be complex. The support surface of the face under construction is computed by a deformation of Surf which satisfies 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. Important: 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 &Constr, 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. Raises ConstructionError if the edge has no representation on a face and Order is GeomAbs_G1 or GeomAbs_G2.
int	Add (const TopoDS_Edge &Constr, 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. Raises ConstructionError if the edge has no 2d representation on 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 (const Message_ProgressRange &theRange=Message_ProgressRange()) override
	Builds the resulting faces.
bool	IsDone () const override
	Tests whether computation of the filling plate has been completed.
const NCollection_List< TopoDS_Shape > &	Generated (const TopoDS_Shape &S) override
	Returns the list of shapes generated from the shape .
double	G0Error () const
	Returns the maximum distance between the result and the constraints. This is set at construction time.
double	G1Error () const
	Returns the maximum angle between the result and the constraints. This is set at construction time.
double	G2Error () const
	Returns the maximum angle between the result and the constraints. This is set at construction time.
double	G0Error (const int Index)
	Returns the maximum distance attained between the result and the constraint Index. This is set at construction time.
double	G1Error (const int Index)
	Returns the maximum angle between the result and the constraints. This is set at construction time.
double	G2Error (const int Index)
	Returns the greatest difference in curvature found between the result and the constraint Index.
Public Member Functions inherited from BRepBuilderAPI_MakeShape
virtual const TopoDS_Shape &	Shape ()
	Returns a shape built by the shape construction algorithm. Raises exception StdFail_NotDone if the shape was not built.
	operator TopoDS_Shape ()
virtual const NCollection_List< TopoDS_Shape > &	Modified (const TopoDS_Shape &S)
	Returns the list of shapes modified from the shape .
virtual bool	IsDeleted (const TopoDS_Shape &S)
	Returns true if the shape S has been deleted.
Public Member Functions inherited from BRepBuilderAPI_Command
virtual	~BRepBuilderAPI_Command ()
void	Check () const
	Raises NotDone if done is false.

Additional Inherited Members
Protected Member Functions inherited from BRepBuilderAPI_MakeShape
	BRepBuilderAPI_MakeShape ()
Protected Member Functions inherited from BRepBuilderAPI_Command
	BRepBuilderAPI_Command ()
	Set done to False.
void	Done ()
	Set done to true.
void	NotDone ()
	Set done to false.
Protected Attributes inherited from BRepBuilderAPI_MakeShape
TopoDS_Shape	myShape
NCollection_List< TopoDS_Shape >	myGenerated

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 of the face 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 satisfyed in an area containing the incompatibilitries.
• 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

BRepOffsetAPI_MakeFilling()

BRepOffsetAPI_MakeFilling::BRepOffsetAPI_MakeFilling	(	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 )

Constructs a wire filling object defined by.

• the energy minimizing criterion Degree
• the number of points on the curve NbPntsOnCur
• the number of iterations NbIter
• the Boolean Anisotropie
• the 2D tolerance Tol2d
• the 3D tolerance Tol3d
• the angular tolerance TolAng
• the tolerance for curvature TolCur
• the highest polynomial degree MaxDeg
• the greatest number of segments MaxSeg. If the Boolean Anistropie is true, the algorithm's performance is better in cases where the ratio of the length U and the length V indicate a great difference between the two. In other words, when the surface is, for example, extremely long.

Member Function Documentation

Add() [1/5]

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

Adds a punctual constraint.

Add() [2/5]

int BRepOffsetAPI_MakeFilling::Add

(

const gp_Pnt &

Point

)

Adds a punctual constraint.

Add() [3/5]

int BRepOffsetAPI_MakeFilling::Add	(	const TopoDS_Edge &	Constr,
		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. Raises ConstructionError if the edge has no representation on a face and Order is GeomAbs_G1 or GeomAbs_G2.

Add() [4/5]

int BRepOffsetAPI_MakeFilling::Add	(	const TopoDS_Edge &	Constr,
		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. Raises ConstructionError if the edge has no 2d representation on the given face.

Add() [5/5]

int BRepOffsetAPI_MakeFilling::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 BRepOffsetAPI_MakeFilling::Build ( const Message_ProgressRange & theRange = Message_ProgressRange() )

overridevirtual

Builds the resulting faces.

Reimplemented from BRepBuilderAPI_MakeShape.

G0Error() [1/2]

double BRepOffsetAPI_MakeFilling::G0Error

(

)

const

Returns the maximum distance between the result and the constraints. This is set at construction time.

G0Error() [2/2]

double BRepOffsetAPI_MakeFilling::G0Error

(

const int

Index

)

Returns the maximum distance attained between the result and the constraint Index. This is set at construction time.

G1Error() [1/2]

double BRepOffsetAPI_MakeFilling::G1Error

(

)

const

Returns the maximum angle between the result and the constraints. This is set at construction time.

G1Error() [2/2]

double BRepOffsetAPI_MakeFilling::G1Error

(

const int

Index

)

Returns the maximum angle between the result and the constraints. This is set at construction time.

G2Error() [1/2]

double BRepOffsetAPI_MakeFilling::G2Error

(

)

const

Returns the maximum angle between the result and the constraints. This is set at construction time.

G2Error() [2/2]

double BRepOffsetAPI_MakeFilling::G2Error

(

const int

Index

)

Returns the greatest difference in curvature found between the result and the constraint Index.

Generated()

const NCollection_List< TopoDS_Shape > & BRepOffsetAPI_MakeFilling::Generated ( const TopoDS_Shape & S )

overridevirtual

Returns the list of shapes generated from the shape .

Reimplemented from BRepBuilderAPI_MakeShape.

IsDone()

bool BRepOffsetAPI_MakeFilling::IsDone ( ) const

overridevirtual

Tests whether computation of the filling plate has been completed.

Reimplemented from BRepBuilderAPI_Command.

LoadInitSurface()

void BRepOffsetAPI_MakeFilling::LoadInitSurface

(

const TopoDS_Face &

Surf

)

Loads the initial surface Surf to begin the construction of the surface. This optional function is useful if the surface resulting from construction for the algorithm is likely to be complex. The support surface of the face under construction is computed by a deformation of Surf which satisfies 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. Important: 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 BRepOffsetAPI_MakeFilling::SetApproxParam	(	const int	MaxDeg = 8,
		const int	MaxSegments = 9 )

Sets the parameters used to approximate the filling surface. These include:

• MaxDeg - the highest degree which the polynomial defining the filling surface can have
• MaxSegments - the greatest number of segments which the filling surface can have.

SetConstrParam()

void BRepOffsetAPI_MakeFilling::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 BRepOffsetAPI_MakeFilling::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:

• BRepOffsetAPI_MakeFilling.hxx