This class implements the algorithms used to
create 2d circles tangent to an entity and
centered on a point.
The arguments of all construction methods are :
More...

#include <GccAna_Circ2dTanCen.hxx>

Public Member Functions
	GccAna_Circ2dTanCen (const GccEnt_QualifiedCirc &Qualified1, const gp_Pnt2d &Pcenter, const Standard_Real Tolerance)
	This method implements the algorithms used to create 2d circles tangent to a circle and centered on a point. More...

	GccAna_Circ2dTanCen (const gp_Lin2d &Linetan, const gp_Pnt2d &Pcenter)
	This method implements the algorithms used to create 2d circles tangent to a line and centered on a point. More...

	GccAna_Circ2dTanCen (const gp_Pnt2d &Point1, const gp_Pnt2d &Pcenter)
	This method implements the algorithms used to <br> create 2d circles passing thrue a point and <br> centered on a point. <br> Tolerance is a tolerance criterion used by the algorithm to find a solution when, mathematically, the problem posed does not have a solution, but where there is numeric uncertainty attached to the arguments. In these algorithms Tolerance is only used in very specific cases where the center of the solution is very close to the circle to which it is tangential, and where the solution is therefore a very small circle. Exceptions GccEnt_BadQualifier if a qualifier is inconsistent with the argument it qualifies (for example, enclosing for a line). More...

Standard_Boolean	IsDone () const
	This method returns True if the construction <br> algorithm succeeded. <br> Note: IsDone protects against a failure arising from a more internal intersection algorithm, which has reached its numeric limits. More...

Standard_Integer	NbSolutions () const
	Returns the number of circles, representing solutions <br> computed by this algorithm and raises NotDone exception if the algorithm didn't succeed. More...

gp_Circ2d	ThisSolution (const Standard_Integer Index) const
	Returns the circle, representing the solution number Index and raises OutOfRange <br> exception if Index is greater than the number of solutions. <br> Be carefull: the Index is only a way to get all the <br> solutions, but is not associated to theses outside the <br> context of the algorithm-object. <br> Raises NotDone if the construction algorithm didn't succeed. It raises OutOfRange if Index is greater than the number of solutions or less than zer More...

void	WhichQualifier (const Standard_Integer Index, GccEnt_Position &Qualif1) const
	Returns the qualifier Qualif1 of the tangency argument <br> for the solution of index Index computed by this algorithm. The returned qualifier is: More...

void	Tangency1 (const Standard_Integer Index, Standard_Real &ParSol, Standard_Real &ParArg, gp_Pnt2d &PntSol) const
	Returns informations about the tangency point between the result number Index and the first argument. ParSol is the intrinsic parameter of the point PntSol on the solution curv. ParArg is the intrinsic parameter of the point PntArg on the argument curv. //! It raises NotDone if the construction algorithm didn't succeed. It raises OutOfRange if Index is greater than the number of solutions or less than zero. More...

Standard_Boolean	IsTheSame1 (const Standard_Integer Index) const
	Returns True if the solution number Index is equal to the first argument. //! It raises NotDone if the construction algorithm didn't succeed. It raises OutOfRange if Index is greater than the number of solutions or less than zero. More...

Detailed Description

This class implements the algorithms used to
create 2d circles tangent to an entity and
centered on a point.
The arguments of all construction methods are :

The qualified element for the tangency constrains
(QualifiedCirc, Line, Point).
The center point Pcenter.
A real Tolerance.
Tolerance is only used in the limits cases.
For example :
We want to create a circle tangent to an EnclosedCirc C1
with a tolerance Tolerance.
If we did not used Tolerance it is impossible to
find a solution in the the following case : Pcenter is
outside C1.
With Tolerance we will give a solution if the distance
between C1 and Pcenter is lower than or equal Tolerance.

Constructor & Destructor Documentation

GccAna_Circ2dTanCen::GccAna_Circ2dTanCen	(	const GccEnt_QualifiedCirc &	Qualified1,
		const gp_Pnt2d &	Pcenter,
		const Standard_Real	Tolerance
	)

This method implements the algorithms used to
create 2d circles tangent to a circle and
centered on a point.

GccAna_Circ2dTanCen::GccAna_Circ2dTanCen	(	const gp_Lin2d &	Linetan,
		const gp_Pnt2d &	Pcenter
	)

This method implements the algorithms used to
create 2d circles tangent to a line and
centered on a point.

GccAna_Circ2dTanCen::GccAna_Circ2dTanCen	(	const gp_Pnt2d &	Point1,
		const gp_Pnt2d &	Pcenter
	)

 This method implements the algorithms used to <br>
     create 2d circles passing thrue a point and <br>
     centered on a point. <br>

Tolerance is a tolerance criterion used by the algorithm
to find a solution when, mathematically, the problem
posed does not have a solution, but where there is
numeric uncertainty attached to the arguments.
In these algorithms Tolerance is only used in very
specific cases where the center of the solution is very
close to the circle to which it is tangential, and where the
solution is therefore a very small circle.
Exceptions
GccEnt_BadQualifier if a qualifier is inconsistent with
the argument it qualifies (for example, enclosing for a line).

Member Function Documentation

Standard_Boolean GccAna_Circ2dTanCen::IsDone ( ) const

 This method returns True if the construction <br>
     algorithm succeeded. <br>

Note: IsDone protects against a failure arising from a
more internal intersection algorithm, which has reached
its numeric limits.

Standard_Boolean GccAna_Circ2dTanCen::IsTheSame1 ( const Standard_Integer Index ) const

Returns True if the solution number Index is equal to
the first argument.
//! It raises NotDone if the construction algorithm
didn't succeed.
It raises OutOfRange if Index is greater than the
number of solutions or less than zero.

Standard_Integer GccAna_Circ2dTanCen::NbSolutions ( ) const

 Returns the number of circles, representing solutions <br>

computed by this algorithm and raises NotDone
exception if the algorithm didn't succeed.

void GccAna_Circ2dTanCen::Tangency1	(	const Standard_Integer	Index,
		Standard_Real &	ParSol,
		Standard_Real &	ParArg,
		gp_Pnt2d &	PntSol
	)		const

Returns informations about the tangency point between the
result number Index and the first argument.
ParSol is the intrinsic parameter of the point PntSol
on the solution curv.
ParArg is the intrinsic parameter of the point PntArg
on the argument curv.
//! It raises NotDone if the construction algorithm
didn't succeed.
It raises OutOfRange if Index is greater than the
number of solutions or less than zero.

gp_Circ2d GccAna_Circ2dTanCen::ThisSolution ( const Standard_Integer Index ) const

 Returns the circle, representing the solution number Index and raises OutOfRange <br>
     exception if Index is greater than the number of solutions. <br>
     Be carefull: the Index is only a way to get all the <br>
     solutions, but is not associated to theses outside the <br>
     context of the algorithm-object. <br>

Raises NotDone if the construction algorithm didn't succeed.
It raises OutOfRange if Index is greater than the
number of solutions or less than zer

void GccAna_Circ2dTanCen::WhichQualifier	(	const Standard_Integer	Index,
		GccEnt_Position &	Qualif1
	)		const

 Returns the qualifier Qualif1 of the tangency argument <br>

for the solution of index Index computed by this algorithm.
The returned qualifier is:

that specified at the start of construction when the
solutions are defined as enclosed, enclosing or
It returns the real qualifiers (the qualifiers given to the
constructor method in case of enclosed, enclosing and outside
and the qualifiers computedin case of unqualified).

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

GccAna_Circ2dTanCen.hxx

Public Member Functions

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation