lsodi_integrator.h

/* Copyright (C) 2004-2018  Martin Förg
 
 * This library is free software; you can redistribute it and/or 
 * modify it under the terms of the GNU Lesser General Public 
 * License as published by the Free Software Foundation; either 
 * version 2.1 of the License, or (at your option) any later version. 
 *  
 * This library is distributed in the hope that it will be useful, 
 * but WITHOUT ANY WARRANTY; without even the implied warranty of 
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU 
 * Lesser General Public License for more details. 
 *  
 * You should have received a copy of the GNU Lesser General Public 
 * License along with this library; if not, write to the Free Software 
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
 
 *
 * Contact:
 *   martin.o.foerg@googlemail.com
 *
 */
 
#ifndef _LSODI_INTEGRATOR_H_
#define _LSODI_INTEGRATOR_H_
 
#include "dae_integrator.h"
 
namespace MBSim {
 
  extern bool odePackInUse;
 
  class LSODIIntegrator : public DAEIntegrator {
 
    private:
      double delta(int i, double z) const override;
      typedef void (*Res)(int* neq, double* t, double* y_, double* yd_, double* res_, int* ires);
      typedef void (*Jac)(int *neq, double* t, double* y_, double *yd_, int* ml, int* mu, double* J_, int* nrowp);
      static Res res[5];
      static Jac jac[5];
      static void resODE(int* neq, double* t, double* z_, double* zd_, double* res_, int* ires);
      static void resDAE2(int* neq, double* t, double* y_, double* yd_, double* res_, int* ires);
      static void resGGL(int* neq, double* t, double* y_, double* yd_, double* res_, int* ires);
      static void adda(int *neq, double* t, double* y_, int* ml, int* mu, double* P, int* nrowp);
      static void jacODE(int *neq, double* t, double* y_, double *yd_, int* ml, int* mu, double* J_, int* nrowp);
      static void jacDAE2(int *neq, double* t, double* y_, double *yd_, int* ml, int* mu, double* J_, int* nrowp);
      static void jacGGL(int *neq, double* t, double* y_, double *yd_, int* ml, int* mu, double* J_, int* nrowp);
 
      void init() override;
      void reinit() override;
 
      double dtMax{0};
      double dtMin{0};
      double dt0{0};
      int maxSteps{std::numeric_limits<int>::max()};
      bool excludeAlgebraicVariables{true};
 
      fmatvec::VecInt neq_;
      fmatvec::Vec rWork;
      int lewt;
 
      std::exception_ptr exception;
 
    public:
      void setMaximumStepSize(double dtMax_) { dtMax = dtMax_; }
      void setMinimumStepSize(double dtMin_) { dtMin = dtMin_; }
      void setInitialStepSize(double dt0_) { dt0 = dt0_; }
      void setStepLimit(int maxSteps_) { maxSteps = maxSteps_; }
      void setExcludeAlgebraicVariablesFromErrorTest(bool excludeAlgebraicVariables_) { excludeAlgebraicVariables = excludeAlgebraicVariables_; }
 
      using Integrator::integrate;
      void integrate();
      
      virtual void initializeUsingXML(xercesc::DOMElement *element);
  };
 
}
 
#endif