CombinedOdeSystem.cpp

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#include "CombinedOdeSystem.hpp"
#include "CombinedOdeSystemInformation.hpp"

CombinedOdeSystem::CombinedOdeSystem(std::vector<AbstractOdeSystem*> odeSystems)
    : AbstractOdeSystem(0) // will be set properly below
{
    mOdeSystems = odeSystems;
    for (unsigned i=0; i<odeSystems.size(); i++)
    {
        mNumberOfStateVariables += odeSystems[i]->GetNumberOfStateVariables();
    }
    mpSystemInfo = CombinedOdeSystemInformation::Instance(odeSystems);
    ResetToInitialConditions();

    // Set up working memory
    unsigned num_systems = odeSystems.size();
    mWorkingStateVars.resize(num_systems);
    mWorkingDerivs.resize(num_systems);
    unsigned offset = 0;
    for (unsigned i=0; i<num_systems; i++)
    {
        unsigned num_vars = odeSystems[i]->GetNumberOfStateVariables();
        mWorkingStateVars[i].resize(num_vars);
        mWorkingDerivs[i].resize(num_vars);
        mOffsets.push_back(offset);
        offset += num_vars;
    }
}


void CombinedOdeSystem::Configure(
        const std::map<unsigned, unsigned>& rVariableParameterMap,
        AbstractOdeSystem* pVariableOdeSystem,
        AbstractOdeSystem* pParameterOdeSystem)
{
    struct VariableParameterMap new_map;
    new_map.theMap = rVariableParameterMap;
    unsigned var_system_index = 0;
    while (var_system_index < mOdeSystems.size() && mOdeSystems[var_system_index] != pVariableOdeSystem)
    {
        ++var_system_index;
    }
    new_map.pVariableOdeSystemIndex = var_system_index;
    new_map.pParameterOdeSystem = pParameterOdeSystem;
    mVariableParameterMaps.push_back(new_map);
}


void CombinedOdeSystem::EvaluateYDerivatives(
        double time,
        const std::vector<double>& rY,
        std::vector<double>& rDY)
{
    // Copy rY to subsystems
    for (unsigned i=0; i<mOdeSystems.size(); i++)
    {
        unsigned offset = mOffsets[i];
        for (unsigned j=0; j<mOdeSystems[i]->GetNumberOfStateVariables(); j++)
        {
            mWorkingStateVars[i][j] = rY[offset + j];
        }
    }

    // Set parameter values
    for (unsigned i=0; i<mVariableParameterMaps.size(); i++)
    {
        std::map<unsigned, unsigned>& r_var_param_map = mVariableParameterMaps[i].theMap;
        // Iterate through map
        for (std::map<unsigned, unsigned>::iterator iter = r_var_param_map.begin();
             iter != r_var_param_map.end();
             ++iter)
        {
            double value = mWorkingStateVars[mVariableParameterMaps[i].pVariableOdeSystemIndex][iter->first];
            mVariableParameterMaps[i].pParameterOdeSystem->SetParameter(iter->second, value);
        }
    }

    // Call EvaluateYDerivatives on subsystems
    for (unsigned i=0; i<mOdeSystems.size(); i++)
    {
        mOdeSystems[i]->EvaluateYDerivatives(time, mWorkingStateVars[i], mWorkingDerivs[i]);
    }

    // Copy derivatives to rDY
    for (unsigned i=0; i<mOdeSystems.size(); i++)
    {
        unsigned offset = mOffsets[i];
        for (unsigned j=0; j<mOdeSystems[i]->GetNumberOfStateVariables(); j++)
        {
            rDY[offset + j] = mWorkingDerivs[i][j];
        }
    }
}