Open CASCADE Technology
7.7.0.dev

This class implements the algorithms used to create 2d circles tangent to a curve and centered on a point. The arguments of all construction methods are : More...
#include <Geom2dGcc_Circ2dTanCen.hxx>
Public Member Functions  
Geom2dGcc_Circ2dTanCen (const Geom2dGcc_QualifiedCurve &Qualified1, const Handle< Geom2d_Point > &Pcenter, const Standard_Real Tolerance)  
Constructs one or more 2D circles tangential to the curve Qualified1 and centered on the point Pcenter. 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. Tolerance is only used in these algorithms 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 thus 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 
Returns true if the construction algorithm does not fail (even if it finds no solution). 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 computed by this algorithm. Exceptions StdFail_NotDone if the construction fails. More...  
gp_Circ2d  ThisSolution (const Standard_Integer Index) const 
Returns a circle, representing the solution of index Index computed by this algorithm. Warning This indexing simply provides a means of consulting the solutions. The index values are not associated with these solutions outside the context of the algorithm object. Exceptions Standard_OutOfRange if Index is less than zero or greater than the number of solutions computed by this algorithm. StdFail_NotDone if the construction fails. More...  
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: More...  
void  Tangency1 (const Standard_Integer Index, Standard_Real &ParSol, Standard_Real &ParArg, gp_Pnt2d &PntSol) const 
Returns information 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 PntSol on the argument curv. Exceptions Standard_OutOfRange if Index is less than zero or greater than the number of solutions computed by this algorithm. StdFail_NotDone if the construction fails. More...  
Standard_Boolean  IsTheSame1 (const Standard_Integer Index) const 
Returns true if the solution of index Index and the first argument of this algorithm are the same (i.e. there are 2 identical circles). If Rarg is the radius of the first argument, Rsol is the radius of the solution and dist is the distance between the two centers, we consider the two circles to be identical if Rarg  Rsol and dist are less than or equal to the tolerance criterion given at the time of construction of this algorithm. NotDone is raised if the construction algorithm didn't succeed. OutOfRange is raised if Index is greater than the number of solutions. More...  
This class implements the algorithms used to create 2d circles tangent to a curve and centered on a point. The arguments of all construction methods are :
Geom2dGcc_Circ2dTanCen::Geom2dGcc_Circ2dTanCen  (  const Geom2dGcc_QualifiedCurve &  Qualified1, 
const Handle< Geom2d_Point > &  Pcenter,  
const Standard_Real  Tolerance  
) 
Constructs one or more 2D circles tangential to the curve Qualified1 and centered on the point Pcenter. 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. Tolerance is only used in these algorithms 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 thus 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 Geom2dGcc_Circ2dTanCen::IsDone  (  )  const 
Returns true if the construction algorithm does not fail (even if it finds no solution). Note: IsDone protects against a failure arising from a more internal intersection algorithm, which has reached its numeric limits.
Standard_Boolean Geom2dGcc_Circ2dTanCen::IsTheSame1  (  const Standard_Integer  Index  )  const 
Returns true if the solution of index Index and the first argument of this algorithm are the same (i.e. there are 2 identical circles). If Rarg is the radius of the first argument, Rsol is the radius of the solution and dist is the distance between the two centers, we consider the two circles to be identical if Rarg  Rsol and dist are less than or equal to the tolerance criterion given at the time of construction of this algorithm. NotDone is raised if the construction algorithm didn't succeed. OutOfRange is raised if Index is greater than the number of solutions.
Standard_Integer Geom2dGcc_Circ2dTanCen::NbSolutions  (  )  const 
Returns the number of circles, representing solutions computed by this algorithm. Exceptions StdFail_NotDone if the construction fails.
void Geom2dGcc_Circ2dTanCen::Tangency1  (  const Standard_Integer  Index, 
Standard_Real &  ParSol,  
Standard_Real &  ParArg,  
gp_Pnt2d &  PntSol  
)  const 
Returns information 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 PntSol on the argument curv. Exceptions Standard_OutOfRange if Index is less than zero or greater than the number of solutions computed by this algorithm. StdFail_NotDone if the construction fails.
gp_Circ2d Geom2dGcc_Circ2dTanCen::ThisSolution  (  const Standard_Integer  Index  )  const 
Returns a circle, representing the solution of index Index computed by this algorithm. Warning This indexing simply provides a means of consulting the solutions. The index values are not associated with these solutions outside the context of the algorithm object. Exceptions Standard_OutOfRange if Index is less than zero or greater than the number of solutions computed by this algorithm. StdFail_NotDone if the construction fails.
void Geom2dGcc_Circ2dTanCen::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: