#ifndef SimTK_SIMMATH_RUNGE_KUTTA_MERSON_INTEGRATOR_REP_H_
#define SimTK_SIMMATH_RUNGE_KUTTA_MERSON_INTEGRATOR_REP_H_

/* -------------------------------------------------------------------------- *
 *                        Simbody(tm): SimTKmath                              *
 * -------------------------------------------------------------------------- *
 * This is part of the SimTK biosimulation toolkit originating from           *
 * Simbios, the NIH National Center for Physics-Based Simulation of           *
 * Biological Structures at Stanford, funded under the NIH Roadmap for        *
 * Medical Research, grant U54 GM072970. See https://simtk.org/home/simbody.  *
 *                                                                            *
 * Portions copyright (c) 2006-12 Stanford University and the Authors.        *
 * Authors: Michael Sherman                                                   *
 * Contributors:                                                              *
 *                                                                            *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may    *
 * not use this file except in compliance with the License. You may obtain a  *
 * copy of the License at http://www.apache.org/licenses/LICENSE-2.0.         *
 *                                                                            *
 * Unless required by applicable law or agreed to in writing, software        *
 * distributed under the License is distributed on an "AS IS" BASIS,          *
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.   *
 * See the License for the specific language governing permissions and        *
 * limitations under the License.                                             *
 * -------------------------------------------------------------------------- */

#include "AbstractIntegratorRep.h"

namespace SimTK {

/**
 * This is the private (library side) implementation of the 
 * RungeKuttaMersonIntegratorRep class which is a concrete class
 * implementing the abstract IntegratorRep.
 */

class RungeKuttaMersonIntegratorRep : public AbstractIntegratorRep {
public:
    RungeKuttaMersonIntegratorRep(Integrator* handle, const System& sys);
protected:
    bool attemptODEStep
       (Real t1, Vector& yErrEst, int& errOrder, int& numIterations);
private:    
    static const int NTemps = 3;
    Vector ytmp[NTemps];
};

} // namespace SimTK

#endif // SimTK_SIMMATH_RUNGE_KUTTA_MERSON_INTEGRATOR_REP_H_


