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//static const char* sccsid = "@(#)math_FunctionRoot.cxx 3.2 95/01/10"; // Do not delete this line. Used by sccs.
//#ifndef DEB
#define No_Standard_RangeError
#define No_Standard_OutOfRange
#define No_Standard_DimensionError
//#endif
#include <Standard_Failure.hxx>
#include <math_FunctionRoot.ixx>
#include <math_FunctionSetRoot.hxx>
#include <math_FunctionSetWithDerivatives.hxx>
#include <math_FunctionWithDerivative.hxx>
class math_MyFunctionSetWithDerivatives : public math_FunctionSetWithDerivatives {
private:
math_FunctionWithDerivative *Ff;
public :
math_MyFunctionSetWithDerivatives (math_FunctionWithDerivative& F );
Standard_Integer NbVariables () const;
Standard_Integer NbEquations () const;
Standard_Boolean Value (const math_Vector& X, math_Vector& F) ;
Standard_Boolean Derivatives (const math_Vector& X, math_Matrix& D) ;
Standard_Boolean Values (const math_Vector& X, math_Vector& F, math_Matrix& D) ;
};
math_MyFunctionSetWithDerivatives::math_MyFunctionSetWithDerivatives
(math_FunctionWithDerivative& F ) {
Ff = &F ;
}
Standard_Integer math_MyFunctionSetWithDerivatives::NbVariables () const {
return 1;
}
Standard_Integer math_MyFunctionSetWithDerivatives::NbEquations () const {
return 1;
}
Standard_Boolean math_MyFunctionSetWithDerivatives::Value (const math_Vector& X, math_Vector& Fs) {
return Ff->Value(X(1),Fs(1));
}
Standard_Boolean math_MyFunctionSetWithDerivatives::Derivatives (const math_Vector& X, math_Matrix& D) {
return Ff->Derivative(X(1),D(1,1));
}
Standard_Boolean math_MyFunctionSetWithDerivatives::Values (const math_Vector& X, math_Vector& F, math_Matrix& D) {
return Ff->Values(X(1),F(1),D(1,1));
}
math_FunctionRoot::math_FunctionRoot(math_FunctionWithDerivative& F,
const Standard_Real Guess,
const Standard_Real Tolerance,
const Standard_Integer NbIterations ){
math_Vector V(1,1), Tol(1,1);
math_MyFunctionSetWithDerivatives Ff(F);
V(1)=Guess;
Tol(1) = Tolerance;
math_FunctionSetRoot Sol(Ff,V,Tol,NbIterations);
Done = Sol.IsDone();
if (Done) {
F.GetStateNumber();
TheRoot = Sol.Root()(1);
TheDerivative = Sol.Derivative()(1,1);
F.Value(TheRoot,TheError);
NbIter = Sol.NbIterations();
}
}
math_FunctionRoot::math_FunctionRoot(math_FunctionWithDerivative& F,
const Standard_Real Guess,
const Standard_Real Tolerance,
const Standard_Real A,
const Standard_Real B,
const Standard_Integer NbIterations ){
math_Vector V(1,1),Aa(1,1),Bb(1,1), Tol(1,1);
math_MyFunctionSetWithDerivatives Ff(F);
V(1)=Guess;
Tol(1) = Tolerance;
Aa(1)=A;
Bb(1)=B;
math_FunctionSetRoot Sol(Ff,V,Tol,Aa,Bb,NbIterations);
Done = Sol.IsDone();
if (Done) {
F.GetStateNumber();
TheRoot = Sol.Root()(1);
TheDerivative = Sol.Derivative()(1,1);
F.Value(TheRoot,TheError);
NbIter = Sol.NbIterations();
}
}
void math_FunctionRoot::Dump(Standard_OStream& o) const {
o<< "math_FunctionRoot ";
if(Done) {
o<< " Status = Done \n";
o << " Number of iterations = " << NbIter << endl;
o << " The Root is: " << TheRoot << endl;
o << "The value at the root is: " << TheError << endl;
}
else {
o<< " Status = not Done \n";
}
}
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