stable_ode_tmpl.hpp

Go to the documentation of this file.

/*
Copyright (c) 2014, Sam Schetterer, Nathan Kutz, University of Washington
Authors: Sam Schetterer
All rights reserved.

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:

1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.

2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.

3. Neither the name of the copyright holder nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

*/
#ifndef STABLE_ODE_TMPL_HPP
#define STABLE_ODE_TMPL_HPP
#include "stable.h"
#include "item_heads.hpp"
template<class T>
class stable_ode_tmpl:public stable_ode{
    protected:
        double tcur;
        T* restr ucur, * restr ulast;
        double int_len;
        double t0; 
        integrator* inter;
        virtual void pre_integration_operations();
        virtual void post_integration_operations();
        virtual void iterate_system();
        virtual double get_change();
    public:
        double score();
        const std::type_info& vtype() const;
        virtual void postprocess(input& invals);
        virtual std::string type() const;
        virtual ~stable_ode_tmpl();
        friend class stable;
};


//stable_ode_tmpl functions

template <class T>
void stable_ode_tmpl<T>::iterate_system(){
    for(size_t i = 0; i < this->dimension; i++){
        ulast[i] = ucur[i];
    }
    this->pre_integration_operations(); 
    int res = inter->integrate(ucur, tcur, tcur+int_len);
    tcur += int_len;
    this->post_integration_operations();
    if(res < 0){
        this->bad_res=1;
    }
}

template <class T>
void stable_ode_tmpl<T>::postprocess(input& invals){
    stable::postprocess(invals);
    invals.retrieve(inter, "integrator", this);
    if(!inter->compare<T>()){
        err("Bad integrator type passed to stable_ode_tmpl", "stable_ode_tmpl:postprocess",
                "simulation/stable_ode_tmpl.hpp", FATAL_ERROR);
    }
    this->add_as_parent(inter);
    invals.retrieve(t0, "t0", this, 0.0);
    tcur = t0;
    invals.retrieve(int_len, "int_len", this);
    const double eps_val = 1e-12;
    if(int_len < eps_val){
        err("Variable int_len is too small, int_len must be greater than 1e-12",
                "stable_ode::postprocess", "system/stable.cpp", FATAL_ERROR);
    }
    memp.add(dimension, &ucur, &ulast);
}

template <class T>
stable_ode_tmpl<T>::~stable_ode_tmpl(){}
template <class T>
void stable_ode_tmpl<T>::pre_integration_operations(){
}
template <class T>
void stable_ode_tmpl<T>::post_integration_operations(){
}
template <class T>
std::string stable_ode_tmpl<T>::type() const{
    std::string val = "stable_ode_tmpl";
    val.append(typeid(T).name());
    return val;
}
template <class T>
double stable_ode_tmpl<T>::score(){
    return this->obj->score((comp*)ucur);
}

template<class T>
const std::type_info& stable_ode_tmpl<T>::vtype() const{
    return typeid(T);
}
template<class T>
double stable_ode_tmpl<T>::get_change(){
    //standard difference is the L2 norm
    double sabs=0;
    for(size_t i = 0; i < this->dimension; i++){
        double aval = abs(ucur[i]-ulast[i]);
        sabs+= aval*aval;
    }
    return sqrt(sabs);
}
#endif