Open CASCADE Technology 6.6.0
Public Member Functions
GccAna_Circ2dTanCen Class Reference

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 :
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#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.

 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 (const gp_Pnt2d &Point1, const gp_Pnt2d &Pcenter)
 This method implements the algorithms used to
create 2d circles passing thrue a point and
centered on a point.
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).

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

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

gp_Circ2d ThisSolution (const Standard_Integer Index) const
 Returns the circle, representing the solution number Index and raises OutOfRange
exception if Index is greater than the number of solutions.
Be carefull: the Index is only a way to get all the
solutions, but is not associated to theses outside the
context of the algorithm-object.
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 WhichQualifier (const Standard_Integer Index, GccEnt_Position &Qualif1) const
 Returns the qualifier Qualif1 of the tangency argument
for the solution of index Index computed by this algorithm.
The returned qualifier is:

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.

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.


Detailed Description


Constructor & Destructor Documentation

GccAna_Circ2dTanCen::GccAna_Circ2dTanCen ( const GccEnt_QualifiedCirc Qualified1,
const gp_Pnt2d Pcenter,
const Standard_Real  Tolerance 
)
GccAna_Circ2dTanCen::GccAna_Circ2dTanCen ( const gp_Lin2d Linetan,
const gp_Pnt2d Pcenter 
)
GccAna_Circ2dTanCen::GccAna_Circ2dTanCen ( const gp_Pnt2d Point1,
const gp_Pnt2d Pcenter 
)

Member Function Documentation

Standard_Boolean GccAna_Circ2dTanCen::IsDone ( ) const
Standard_Boolean GccAna_Circ2dTanCen::IsTheSame1 ( const Standard_Integer  Index) const
Standard_Integer GccAna_Circ2dTanCen::NbSolutions ( ) const
void GccAna_Circ2dTanCen::Tangency1 ( const Standard_Integer  Index,
Standard_Real ParSol,
Standard_Real ParArg,
gp_Pnt2d PntSol 
) const
gp_Circ2d GccAna_Circ2dTanCen::ThisSolution ( const Standard_Integer  Index) const
void GccAna_Circ2dTanCen::WhichQualifier ( const Standard_Integer  Index,
GccEnt_Position Qualif1 
) const
  • 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:
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