UltraSparseCodePopulation.cpp

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/************************************************************************
* Verve                                                                 *
* Copyright (C) 2004-2006                                               *
* Tyler Streeter  tylerstreeter@gmail.com                               *
* All rights reserved.                                                  *
* Web: http://verve-agents.sourceforge.net                              *
*                                                                       *
* This library is free software; you can redistribute it and/or         *
* modify it under the terms of EITHER:                                  *
*   (1) 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. The text of the GNU Lesser      *
*       General Public License is included with this library in the     *
*       file license-LGPL.txt.                                          *
*   (2) The BSD-style license that is included with this library in     *
*       the file license-BSD.txt.                                       *
*                                                                       *
* 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 files    *
* license-LGPL.txt and license-BSD.txt for more details.                *
************************************************************************/

#include "UltraSparseCodePopulation.h"
#include "Neuron.h"

namespace verve
{
        UltraSparseCodePopulation::UltraSparseCodePopulation()
        : Population()
        {
                mActiveIndex = -1;
        }

        UltraSparseCodePopulation::~UltraSparseCodePopulation()
        {
        }

        void UltraSparseCodePopulation::init(unsigned int numNeurons)
        {
                Population::init(numNeurons);
                mActiveIndex = -1;
        }

        void UltraSparseCodePopulation::resetShortTermMemory()
        {
                // This should zero all firing rates.
                Population::resetShortTermMemory();
                mActiveIndex = -1;
                // Be sure not to activate any Neurons here.
        }

        void UltraSparseCodePopulation::setActiveOutput(unsigned int i)
        {
                if (mNeurons.empty() || i == mActiveIndex)
                {
                        return;
                }

                // If another Neuron is currently active, zero its firing rate.
                if (-1 != mActiveIndex)
                {
                        mNeurons[mActiveIndex]->setFiringRate(0);
                }

                mActiveIndex = i;
                mNeurons[mActiveIndex]->setFiringRate(1);
        }

        int UltraSparseCodePopulation::getActiveOutput()const
        {
                return mActiveIndex;
        }
}

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