Complements standard tool Geom_Surface by providing additional
functionality for detection surface singularities, checking
spatial surface closure and computing projections of 3D points
onto a surface.

More...

#include <ShapeAnalysis_Surface.hxx>

Inheritance diagram for ShapeAnalysis_Surface:

[legend]

Public Member Functions
	ShapeAnalysis_Surface (const Handle< Geom_Surface > &S)
	Creates an analyzer object on the basis of existing surface More...

void	Init (const Handle< Geom_Surface > &S)
	Loads existing surface More...

void	Init (const Handle< ShapeAnalysis_Surface > &other)
	Reads all the data from another Surface, without recomputing More...

void	SetDomain (const Standard_Real U1, const Standard_Real U2, const Standard_Real V1, const Standard_Real V2)

const Handle_Geom_Surface &	Surface () const
	Returns a surface being analyzed More...

const Handle_GeomAdaptor_HSurface &	Adaptor3d ()
	Returns the Adaptor. Creates it if not yet done. More...

const Handle_GeomAdaptor_HSurface &	TrueAdaptor3d () const
	Returns the Adaptor (may be Null if method Adaptor() was not called) More...

Standard_Real	Gap () const
	Returns 3D distance found by one of the following methods. IsDegenerated, DegeneratedValues, ProjectDegenerated (distance between 3D point and found or last (if not found) singularity), IsUClosed, IsVClosed (minimum value of precision to consider the surface to be closed), ValueOfUV (distance between 3D point and found solution). More...

gp_Pnt	Value (const Standard_Real u, const Standard_Real v)
	Returns a 3D point specified by parameters in surface parametrical space More...

gp_Pnt	Value (const gp_Pnt2d &p2d)
	Returns a 3d point specified by a point in surface parametrical space More...

Standard_Boolean	HasSingularities (const Standard_Real preci)
	Returns True if the surface has singularities for the given precision (i.e. if there are surface singularities with sizes not greater than precision). More...

Standard_Integer	NbSingularities (const Standard_Real preci)
	Returns the number of singularities for the given precision (i.e. number of surface singularities with sizes not greater than precision). More...

Standard_Boolean	Singularity (const Standard_Integer num, Standard_Real &preci, gp_Pnt &P3d, gp_Pnt2d &firstP2d, gp_Pnt2d &lastP2d, Standard_Real &firstpar, Standard_Real &lastpar, Standard_Boolean &uisodeg)
	Returns the characteristics of the singularity specified by its rank number <num>. That means, that it is not neccessary for <num> to be in the range [1, NbSingularities] but must be not greater than possible (see ComputeSingularities). The returned characteristics are: preci: the smallest precision with which the iso-line is considered as degenerated, P3d: 3D point of singularity (middle point of the surface iso-line), firstP2d and lastP2d: first and last 2D points of the iso-line in parametrical surface, firstpar and lastpar: first and last parameters of the iso-line in parametrical surface, uisodeg: if the degenerated iso-line is U-iso (True) or V-iso (False). Returns False if <num> is out of range, else returns True. More...

Standard_Boolean	IsDegenerated (const gp_Pnt &P3d, const Standard_Real preci)
	Returns True if there is at least one surface boundary which is considered as degenerated with <preci> and distance between P3d and corresponding singular point is less than <preci> More...

Standard_Boolean	DegeneratedValues (const gp_Pnt &P3d, const Standard_Real preci, gp_Pnt2d &firstP2d, gp_Pnt2d &lastP2d, Standard_Real &firstpar, Standard_Real &lastpar, const Standard_Boolean forward=Standard_True)
	Returns True if there is at least one surface iso-line which is considered as degenerated with <preci> and distance between P3d and corresponding singular point is less than <preci> (like IsDegenerated). Returns characteristics of the first found boundary matching those criteria. More...

Standard_Boolean	ProjectDegenerated (const gp_Pnt &P3d, const Standard_Real preci, const gp_Pnt2d &neighbour, gp_Pnt2d &result)
	Projects a point <P3d> on a singularity by computing <br> one of the coordinates of preliminary computed <result>. <br> Finds the iso-line which is considered as degenerated with <preci> and a. distance between P3d and corresponding singular point is less than <preci> (like IsDegenerated) or b. difference between already computed <result>'s coordinate and iso-coordinate of the boundary is less than 2D resolution (computed from <preci> by Geom_Adaptor). Then sets not yet computed <result>'s coordinate taking it from <neighbour> and returns True. More...

Standard_Boolean	ProjectDegenerated (const Standard_Integer nbrPnt, const TColgp_Array1OfPnt &points, TColgp_Array1OfPnt2d &pnt2d, const Standard_Real preci, const Standard_Boolean direct)
	Checks points at the beginning (direct is True) or end (direct is False) of array <points> to lie in singularity of surface, and if yes, adjusts the indeterminate 2d coordinate of these points by nearest point which is not in singularity. Returns True if some points were adjusted. More...

Standard_Boolean	IsDegenerated (const gp_Pnt2d &p2d1, const gp_Pnt2d &p2d2, const Standard_Real tol, const Standard_Real ratio)
	Returns True if straight pcurve going from point p2d1 to p2d2 is degenerate, i.e. lies in the singularity of the surface. NOTE: it uses another method of detecting singularity than used by ComputeSingularities() et al.! For that, maximums of distances between points p2d1, p2d2 and 0.5*(p2d1+p2d2) and between corresponding 3d points are computed. The pcurve (p2d1, p2d2) is considered as degenerate if: More...

void	Bounds (Standard_Real &ufirst, Standard_Real &ulast, Standard_Real &vfirst, Standard_Real &vlast) const
	Returns the bounds of the surface (from Bounds from Surface, but buffered) More...

void	ComputeBoundIsos ()
	Computes bound isos (protected against exceptions) More...

Handle_Geom_Curve	UIso (const Standard_Real U)
	Returns a U-Iso. Null if not possible or failed Remark : bound isos are buffered More...

Handle_Geom_Curve	VIso (const Standard_Real V)
	Returns a V-Iso. Null if not possible or failed Remark : bound isos are buffered More...

Standard_Boolean	IsUClosed (const Standard_Real preci=-1)
	Tells if the Surface is spatially closed in U with given precision. If <preci> < 0 then Precision::Confusion is used. If Geom_Surface says that the surface is U-closed, this method also says this. Otherwise additional analysis is performed, comparing given precision with the following distances: More...

Standard_Boolean	IsVClosed (const Standard_Real preci=-1)
	Tells if the Surface is spatially closed in V with given precision. If <preci> < 0 then Precision::Confusion is used. If Geom_Surface says that the surface is V-closed, this method also says this. Otherwise additional analysis is performed, comparing given precision with the following distances: More...

gp_Pnt2d	ValueOfUV (const gp_Pnt &P3D, const Standard_Real preci)
	Computes the parameters in the surface parametrical space of 3D point. The result is parameters of the point projected onto the surface. This method enhances functionality provided by the standard tool GeomAPI_ProjectPointOnSurface by treatment of cases when the projected point is near to the surface boundaries and when this standard tool fails. More...

gp_Pnt2d	NextValueOfUV (const gp_Pnt2d &p2dPrev, const gp_Pnt &P3D, const Standard_Real preci, const Standard_Real maxpreci=-1.0)
	Projects a point P3D on the surface. Does the same thing as ValueOfUV but tries to optimize computations by taking into account previous point <p2dPrev>: makes a step by UV and tries Newton algorithm. If <maxpreci> >0. and distance between solution and P3D is greater than <maxpreci>, that solution is considered as bad, and ValueOfUV() is used. If not succeded, calls ValueOfUV() More...

Standard_Real	UVFromIso (const gp_Pnt &P3D, const Standard_Real preci, Standard_Real &U, Standard_Real &V)
	Tries a refinement of an already computed couple (U,V) by using projecting 3D point on iso-lines: More...

Standard_Real	UCloseVal () const
	Returns minimum value to consider the surface as U-closed More...

Standard_Real	VCloseVal () const
	Returns minimum value to consider the surface as V-closed More...

const Bnd_Box &	GetBoxUF ()

const Bnd_Box &	GetBoxUL ()

const Bnd_Box &	GetBoxVF ()

const Bnd_Box &	GetBoxVL ()

Public Member Functions inherited from MMgt_TShared
virtual void	Delete () const
	Memory deallocator for transient classes. More...

Public Member Functions inherited from Standard_Transient
	Standard_Transient ()
	Empty constructor. More...

	Standard_Transient (const Standard_Transient &)
	Copy constructor – does nothing. More...

Standard_Transient &	operator= (const Standard_Transient &)
	Assignment operator, needed to avoid copying reference counter. More...

virtual	~Standard_Transient ()
	Destructor must be virtual. More...

virtual void	ShallowDump (Standard_OStream &) const

virtual const Handle_Standard_Type &	DynamicType () const
	Returns a type information object about this object. More...

Standard_Boolean	IsInstance (const Handle_Standard_Type &theType) const
	Returns a true value if this is an instance of Type. More...

Standard_Boolean	IsInstance (const Standard_CString theTypeName) const
	Returns a true value if this is an instance of TypeName. More...

Standard_Boolean	IsKind (const Handle_Standard_Type &theType) const
	Returns true if this is an instance of Type or an instance of any class that inherits from Type. Note that multiple inheritance is not supported by OCCT RTTI mechanism. More...

Standard_Boolean	IsKind (const Standard_CString theTypeName) const
	Returns true if this is an instance of TypeName or an instance of any class that inherits from TypeName. Note that multiple inheritance is not supported by OCCT RTTI mechanism. More...

virtual Handle_Standard_Transient	This () const
	Returns a Handle which references this object. Must never be called to objects created in stack. More...

Standard_Integer	GetRefCount () const
	Get the reference counter of this object. More...

Protected Attributes
Handle_Geom_Surface	mySurf

Handle_GeomAdaptor_HSurface	myAdSur

Extrema_ExtPS	myExtPS

GeomAdaptor_Surface	myExtSrf

Standard_Boolean	myExtOK

Standard_Integer	myNbDeg

Standard_Real	myPreci [4]

gp_Pnt	myP3d [4]

gp_Pnt2d	myFirstP2d [4]

gp_Pnt2d	myLastP2d [4]

Standard_Real	myFirstPar [4]

Standard_Real	myLastPar [4]

Standard_Boolean	myUIsoDeg [4]

Standard_Boolean	myIsos

Standard_Real	myUF

Standard_Real	myUL

Standard_Real	myVF

Standard_Real	myVL

Handle_Geom_Curve	myIsoUF

Handle_Geom_Curve	myIsoUL

Handle_Geom_Curve	myIsoVF

Handle_Geom_Curve	myIsoVL

Standard_Boolean	myIsoBoxes

Bnd_Box	myBndUF

Bnd_Box	myBndUL

Bnd_Box	myBndVF

Bnd_Box	myBndVL

Standard_Real	myGap

Standard_Real	myUDelt

Standard_Real	myVDelt

Standard_Real	myUCloseVal

Standard_Real	myVCloseVal

Detailed Description

Complements standard tool Geom_Surface by providing additional
functionality for detection surface singularities, checking
spatial surface closure and computing projections of 3D points
onto a surface.

     * The singularities <br>
     Each singularity stores the precision with which corresponding <br>
     surface iso-line is considered as degenerated. <br>
     The number of singularities is determined by specifying precision <br>
     and always not greater than 4. <br>

The spatial closure
The check for spatial closure is performed with given precision
(default value is Precision::Confusion).
If Geom_Surface says that the surface is closed, this class
also says this. Otherwise additional analysis is performed.
- The parameters of 3D point on the surface
  The projection of the point is performed with given precision.
  This class tries to find a solution taking into account possible
  singularities.
  Additional method for searching the solution from already built
  one is also provided.
  
  This tool is optimised: computes most information only once

Constructor & Destructor Documentation

ShapeAnalysis_Surface::ShapeAnalysis_Surface ( const Handle< Geom_Surface > & S )

Creates an analyzer object on the basis of existing surface

Member Function Documentation

const Handle_GeomAdaptor_HSurface& ShapeAnalysis_Surface::Adaptor3d ( )

Returns the Adaptor.
Creates it if not yet done.

void ShapeAnalysis_Surface::Bounds	(	Standard_Real &	ufirst,
		Standard_Real &	ulast,
		Standard_Real &	vfirst,
		Standard_Real &	vlast
	)		const

Returns the bounds of the surface
(from Bounds from Surface, but buffered)

void ShapeAnalysis_Surface::ComputeBoundIsos ( )

Computes bound isos (protected against exceptions)

Standard_Boolean ShapeAnalysis_Surface::DegeneratedValues	(	const gp_Pnt &	P3d,
		const Standard_Real	preci,
		gp_Pnt2d &	firstP2d,
		gp_Pnt2d &	lastP2d,
		Standard_Real &	firstpar,
		Standard_Real &	lastpar,
		const Standard_Boolean	forward = `Standard_True`
	)

Returns True if there is at least one surface iso-line which
is considered as degenerated with <preci> and distance
between P3d and corresponding singular point is less than
<preci> (like IsDegenerated).
Returns characteristics of the first found boundary matching
those criteria.

Standard_Real ShapeAnalysis_Surface::Gap ( ) const

Returns 3D distance found by one of the following methods.
IsDegenerated, DegeneratedValues, ProjectDegenerated
(distance between 3D point and found or last (if not found)
singularity),
IsUClosed, IsVClosed (minimum value of precision to consider
the surface to be closed),
ValueOfUV (distance between 3D point and found solution).

const Bnd_Box& ShapeAnalysis_Surface::GetBoxUF ( )

const Bnd_Box& ShapeAnalysis_Surface::GetBoxUL ( )

const Bnd_Box& ShapeAnalysis_Surface::GetBoxVF ( )

const Bnd_Box& ShapeAnalysis_Surface::GetBoxVL ( )

Standard_Boolean ShapeAnalysis_Surface::HasSingularities ( const Standard_Real preci )

Returns True if the surface has singularities for the given
precision (i.e. if there are surface singularities with sizes
not greater than precision).

void ShapeAnalysis_Surface::Init ( const Handle< Geom_Surface > & S )

Loads existing surface

void ShapeAnalysis_Surface::Init ( const Handle< ShapeAnalysis_Surface > & other )

Reads all the data from another Surface, without recomputing

Standard_Boolean ShapeAnalysis_Surface::IsDegenerated	(	const gp_Pnt &	P3d,
		const Standard_Real	preci
	)

Returns True if there is at least one surface boundary which
is considered as degenerated with <preci> and distance
between P3d and corresponding singular point is less than
<preci>

Standard_Boolean ShapeAnalysis_Surface::IsDegenerated	(	const gp_Pnt2d &	p2d1,
		const gp_Pnt2d &	p2d2,
		const Standard_Real	tol,
		const Standard_Real	ratio
	)

Returns True if straight pcurve going from point p2d1 to p2d2
is degenerate, i.e. lies in the singularity of the surface.
NOTE: it uses another method of detecting singularity than
used by ComputeSingularities() et al.!
For that, maximums of distances between points p2d1, p2d2
and 0.5*(p2d1+p2d2) and between corresponding 3d points are
computed.
The pcurve (p2d1, p2d2) is considered as degenerate if:

max distance in 3d is less than <tol>
max distance in 2d is at least <ratio> times greather than
the Resolution computed from max distance in 3d
(max3d < tol && max2d > ratio * Resolution(max3d))
NOTE: <ratio> should be >1 (e.g. 10)

Standard_Boolean ShapeAnalysis_Surface::IsUClosed ( const Standard_Real preci = -1 )

Tells if the Surface is spatially closed in U with given
precision. If <preci> < 0 then Precision::Confusion is used.
If Geom_Surface says that the surface is U-closed, this method
also says this. Otherwise additional analysis is performed,
comparing given precision with the following distances:

periodic B-Splines are closed,
polinomial B-Spline with boundary multiplicities degree+1
and Bezier - maximum distance between poles,
rational B-Spline or one with boundary multiplicities not
degree+1 - maximum distance computed at knots and their
middles,
surface of extrusion - distance between ends of basis
curve,
other (RectangularTrimmed and Offset) - maximum distance
computed at 100 equi-distanted points.

Standard_Boolean ShapeAnalysis_Surface::IsVClosed ( const Standard_Real preci = -1 )

Tells if the Surface is spatially closed in V with given
precision. If <preci> < 0 then Precision::Confusion is used.
If Geom_Surface says that the surface is V-closed, this method
also says this. Otherwise additional analysis is performed,
comparing given precision with the following distances:

periodic B-Splines are closed,
polinomial B-Spline with boundary multiplicities degree+1
and Bezier - maximum distance between poles,
rational B-Spline or one with boundary multiplicities not
degree+1 - maximum distance computed at knots and their
middles,
surface of revolution - distance between ends of basis
curve,
other (RectangularTrimmed and Offset) - maximum distance
computed at 100 equi-distanted points.

Standard_Integer ShapeAnalysis_Surface::NbSingularities ( const Standard_Real preci )

Returns the number of singularities for the given precision
(i.e. number of surface singularities with sizes not greater
than precision).

gp_Pnt2d ShapeAnalysis_Surface::NextValueOfUV	(	const gp_Pnt2d &	p2dPrev,
		const gp_Pnt &	P3D,
		const Standard_Real	preci,
		const Standard_Real	maxpreci = `-1.0`
	)

Projects a point P3D on the surface.
Does the same thing as ValueOfUV but tries to optimize
computations by taking into account previous point <p2dPrev>:
makes a step by UV and tries Newton algorithm.
If <maxpreci> >0. and distance between solution and
P3D is greater than <maxpreci>, that solution is considered
as bad, and ValueOfUV() is used.
If not succeded, calls ValueOfUV()

Standard_Boolean ShapeAnalysis_Surface::ProjectDegenerated	(	const gp_Pnt &	P3d,
		const Standard_Real	preci,
		const gp_Pnt2d &	neighbour,
		gp_Pnt2d &	result
	)

 Projects a point <P3d> on a singularity by computing <br>
     one of the coordinates of preliminary computed <result>. <br>

Finds the iso-line which is considered as degenerated with
<preci> and
a. distance between P3d and corresponding singular point is
less than <preci> (like IsDegenerated) or
b. difference between already computed <result>'s coordinate
and iso-coordinate of the boundary is less than 2D
resolution (computed from <preci> by Geom_Adaptor).
Then sets not yet computed <result>'s coordinate taking it
from <neighbour> and returns True.

Standard_Boolean ShapeAnalysis_Surface::ProjectDegenerated	(	const Standard_Integer	nbrPnt,
		const TColgp_Array1OfPnt &	points,
		TColgp_Array1OfPnt2d &	pnt2d,
		const Standard_Real	preci,
		const Standard_Boolean	direct
	)

Checks points at the beginning (direct is True) or end
(direct is False) of array <points> to lie in singularity of
surface, and if yes, adjusts the indeterminate 2d coordinate
of these points by nearest point which is not in singularity.
Returns True if some points were adjusted.

void ShapeAnalysis_Surface::SetDomain	(	const Standard_Real	U1,
		const Standard_Real	U2,
		const Standard_Real	V1,
		const Standard_Real	V2
	)

Standard_Boolean ShapeAnalysis_Surface::Singularity	(	const Standard_Integer	num,
		Standard_Real &	preci,
		gp_Pnt &	P3d,
		gp_Pnt2d &	firstP2d,
		gp_Pnt2d &	lastP2d,
		Standard_Real &	firstpar,
		Standard_Real &	lastpar,
		Standard_Boolean &	uisodeg
	)

Returns the characteristics of the singularity specified by
its rank number <num>.
That means, that it is not neccessary for <num> to be in the
range [1, NbSingularities] but must be not greater than
possible (see ComputeSingularities).
The returned characteristics are:
preci: the smallest precision with which the iso-line is
considered as degenerated,
P3d: 3D point of singularity (middle point of the surface
iso-line),
firstP2d and lastP2d: first and last 2D points of the
iso-line in parametrical surface,
firstpar and lastpar: first and last parameters of the
iso-line in parametrical surface,
uisodeg: if the degenerated iso-line is U-iso (True) or
V-iso (False).
Returns False if <num> is out of range, else returns True.

const Handle_Geom_Surface& ShapeAnalysis_Surface::Surface ( ) const

Returns a surface being analyzed

const Handle_GeomAdaptor_HSurface& ShapeAnalysis_Surface::TrueAdaptor3d ( ) const

Returns the Adaptor (may be Null if method Adaptor() was not called)

Standard_Real ShapeAnalysis_Surface::UCloseVal ( ) const

Returns minimum value to consider the surface as U-closed

Handle_Geom_Curve ShapeAnalysis_Surface::UIso ( const Standard_Real U )

Returns a U-Iso. Null if not possible or failed
Remark : bound isos are buffered

Standard_Real ShapeAnalysis_Surface::UVFromIso	(	const gp_Pnt &	P3D,
		const Standard_Real	preci,
		Standard_Real &	U,
		Standard_Real &	V
	)

Tries a refinement of an already computed couple (U,V) by
using projecting 3D point on iso-lines:

boundaries of the surface,
iso-lines passing through (U,V)
iteratively received iso-lines passing through new U and
new V (number of iterations is limited by 5 in each
direction)
Returns the best resulting distance between P3D and Value(U,V)
in the case of success. Else, returns a very great value

gp_Pnt ShapeAnalysis_Surface::Value	(	const Standard_Real	u,
		const Standard_Real	v
	)

Returns a 3D point specified by parameters in surface
parametrical space

gp_Pnt ShapeAnalysis_Surface::Value ( const gp_Pnt2d & p2d )

Returns a 3d point specified by a point in surface
parametrical space

gp_Pnt2d ShapeAnalysis_Surface::ValueOfUV	(	const gp_Pnt &	P3D,
		const Standard_Real	preci
	)

Computes the parameters in the surface parametrical space of
3D point.
The result is parameters of the point projected onto the
surface.
This method enhances functionality provided by the standard
tool GeomAPI_ProjectPointOnSurface by treatment of cases when
the projected point is near to the surface boundaries and
when this standard tool fails.

Standard_Real ShapeAnalysis_Surface::VCloseVal ( ) const

Returns minimum value to consider the surface as V-closed

Handle_Geom_Curve ShapeAnalysis_Surface::VIso ( const Standard_Real V )

Returns a V-Iso. Null if not possible or failed
Remark : bound isos are buffered

Field Documentation

Handle_GeomAdaptor_HSurface ShapeAnalysis_Surface::myAdSur

protected

Bnd_Box ShapeAnalysis_Surface::myBndUF

protected

Bnd_Box ShapeAnalysis_Surface::myBndUL

protected

Bnd_Box ShapeAnalysis_Surface::myBndVF

protected

Bnd_Box ShapeAnalysis_Surface::myBndVL

protected

Standard_Boolean ShapeAnalysis_Surface::myExtOK

protected

Extrema_ExtPS ShapeAnalysis_Surface::myExtPS

protected

GeomAdaptor_Surface ShapeAnalysis_Surface::myExtSrf

protected

gp_Pnt2d ShapeAnalysis_Surface::myFirstP2d[4]

protected

Standard_Real ShapeAnalysis_Surface::myFirstPar[4]

protected

Standard_Real ShapeAnalysis_Surface::myGap

protected

Standard_Boolean ShapeAnalysis_Surface::myIsoBoxes

protected

Standard_Boolean ShapeAnalysis_Surface::myIsos

protected

Handle_Geom_Curve ShapeAnalysis_Surface::myIsoUF

protected

Handle_Geom_Curve ShapeAnalysis_Surface::myIsoUL

protected

Handle_Geom_Curve ShapeAnalysis_Surface::myIsoVF

protected

Handle_Geom_Curve ShapeAnalysis_Surface::myIsoVL

protected

gp_Pnt2d ShapeAnalysis_Surface::myLastP2d[4]

protected

Standard_Real ShapeAnalysis_Surface::myLastPar[4]

protected

Standard_Integer ShapeAnalysis_Surface::myNbDeg

protected

gp_Pnt ShapeAnalysis_Surface::myP3d[4]

protected

Standard_Real ShapeAnalysis_Surface::myPreci[4]

protected

Handle_Geom_Surface ShapeAnalysis_Surface::mySurf

protected

Standard_Real ShapeAnalysis_Surface::myUCloseVal

protected

Standard_Real ShapeAnalysis_Surface::myUDelt

protected

Standard_Real ShapeAnalysis_Surface::myUF

protected

Standard_Boolean ShapeAnalysis_Surface::myUIsoDeg[4]

protected

Standard_Real ShapeAnalysis_Surface::myUL

protected

Standard_Real ShapeAnalysis_Surface::myVCloseVal

protected

Standard_Real ShapeAnalysis_Surface::myVDelt

protected

Standard_Real ShapeAnalysis_Surface::myVF

protected

Standard_Real ShapeAnalysis_Surface::myVL

protected

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

ShapeAnalysis_Surface.hxx

Public Member Functions

Protected Attributes

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation

Field Documentation