Open CASCADE Technology
7.7.0

This class implements the algorithms used to create 2d lines tangent to 2 other elements which can be circles or points. Describes functions for building a 2D line: More...
#include <GccAna_Lin2d2Tan.hxx>
Public Member Functions  
GccAna_Lin2d2Tan (const gp_Pnt2d &ThePoint1, const gp_Pnt2d &ThePoint2, const Standard_Real Tolerance)  
This methods implements the algorithms used to create 2d lines passing through 2 points. Tolerance is used because we can't create a line when the distance between the two points is too small. More...  
GccAna_Lin2d2Tan (const GccEnt_QualifiedCirc &Qualified1, const gp_Pnt2d &ThePoint, const Standard_Real Tolerance)  
This methods implements the algorithms used to create 2d lines tangent to one circle and passing through a point. Exception BadQualifier is raised in the case of EnclosedCirc Tolerance is used because there is no solution when the point is inside the solution according to the tolerance. More...  
GccAna_Lin2d2Tan (const GccEnt_QualifiedCirc &Qualified1, const GccEnt_QualifiedCirc &Qualified2, const Standard_Real Tolerance)  
This methods implements the algorithms used to create 2d lines tangent to 2 circles. Exception BadQualifier is raised in the case of EnclosedCirc. More...  
Standard_Boolean  IsDone () const 
This method returns true when there is a solution and false in the other cases. More...  
Standard_Integer  NbSolutions () const 
This method returns the number of solutions. Raises NotDone if the construction algorithm didn't succeed. More...  
gp_Lin2d  ThisSolution (const Standard_Integer Index) const 
Returns the solution number Index and raises OutOfRange exception if Index is greater than the number of solutions. Be careful: the Index is only a way to get all the solutions, but is not associated to these outside the context of the algorithmobject. Raises OutOfRange is raised if Index is greater than the number of solutions. It raises NotDone if the algorithm failed. More...  
void  WhichQualifier (const Standard_Integer Index, GccEnt_Position &Qualif1, GccEnt_Position &Qualif2) const 
Returns the qualifiers Qualif1 and Qualif2 of the tangency arguments for the solution of index Index computed by this algorithm. The returned qualifiers are: 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. Raises OutOfRange is raised if Index is greater than the number of solutions. It raises NotDone if the algorithm failed. More...  
void  Tangency2 (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 second argument. ParSol is the intrinsic parameter of the point ParSol on the solution curv. ParArg is the intrinsic parameter of the point PntSol on the argument curv. Raises OutOfRange is raised if Index is greater than the number of solutions. It raises NotDone if the algorithm failed. More...  
This class implements the algorithms used to create 2d lines tangent to 2 other elements which can be circles or points. Describes functions for building a 2D line:
GccAna_Lin2d2Tan::GccAna_Lin2d2Tan  (  const gp_Pnt2d &  ThePoint1, 
const gp_Pnt2d &  ThePoint2,  
const Standard_Real  Tolerance  
) 
This methods implements the algorithms used to create 2d lines passing through 2 points. Tolerance is used because we can't create a line when the distance between the two points is too small.
GccAna_Lin2d2Tan::GccAna_Lin2d2Tan  (  const GccEnt_QualifiedCirc &  Qualified1, 
const gp_Pnt2d &  ThePoint,  
const Standard_Real  Tolerance  
) 
This methods implements the algorithms used to create 2d lines tangent to one circle and passing through a point. Exception BadQualifier is raised in the case of EnclosedCirc Tolerance is used because there is no solution when the point is inside the solution according to the tolerance.
GccAna_Lin2d2Tan::GccAna_Lin2d2Tan  (  const GccEnt_QualifiedCirc &  Qualified1, 
const GccEnt_QualifiedCirc &  Qualified2,  
const Standard_Real  Tolerance  
) 
This methods implements the algorithms used to create 2d lines tangent to 2 circles. Exception BadQualifier is raised in the case of EnclosedCirc.
Standard_Boolean GccAna_Lin2d2Tan::IsDone  (  )  const 
This method returns true when there is a solution and false in the other cases.
Standard_Integer GccAna_Lin2d2Tan::NbSolutions  (  )  const 
This method returns the number of solutions. Raises NotDone if the construction algorithm didn't succeed.
void GccAna_Lin2d2Tan::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. Raises OutOfRange is raised if Index is greater than the number of solutions. It raises NotDone if the algorithm failed.
void GccAna_Lin2d2Tan::Tangency2  (  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 second argument. ParSol is the intrinsic parameter of the point ParSol on the solution curv. ParArg is the intrinsic parameter of the point PntSol on the argument curv. Raises OutOfRange is raised if Index is greater than the number of solutions. It raises NotDone if the algorithm failed.
gp_Lin2d GccAna_Lin2d2Tan::ThisSolution  (  const Standard_Integer  Index  )  const 
Returns the solution number Index and raises OutOfRange exception if Index is greater than the number of solutions. Be careful: the Index is only a way to get all the solutions, but is not associated to these outside the context of the algorithmobject. Raises OutOfRange is raised if Index is greater than the number of solutions. It raises NotDone if the algorithm failed.
void GccAna_Lin2d2Tan::WhichQualifier  (  const Standard_Integer  Index, 
GccEnt_Position &  Qualif1,  
GccEnt_Position &  Qualif2  
)  const 
Returns the qualifiers Qualif1 and Qualif2 of the tangency arguments for the solution of index Index computed by this algorithm. The returned qualifiers are: