TDProjection.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 "TDProjection.h"
#include "Neuron.h"

namespace verve
{
        TDProjection::TDProjection(TDConnectionType type)
        : Projection()
        {
                mTDConnectionType = type;
                mETraceDecayFactor = 0;
                mTDDiscountFactor = 0;
        }

        TDProjection::~TDProjection()
        {
        }

        void TDProjection::setETraceDecayFactor(real value)
        {
                // Store this value for new Connections later.
                mETraceDecayFactor = value;

                // Update all existing Connections.
                unsigned int size = (unsigned int)mConnections.size();
                for (unsigned int i = 0; i < size; ++i)
                {
                        static_cast<TDConnection*>(mConnections[i])->
                                setETraceDecayFactor(value);
                }
        }

        void TDProjection::setTDDiscountFactor(real value)
        {
                // Store this value for new Connections later.
                mTDDiscountFactor = value;

                // Update all existing Connections.
                unsigned int size = (unsigned int)mConnections.size();
                for (unsigned int i = 0; i < size; ++i)
                {
                        static_cast<TDConnection*>(mConnections[i])->
                                setTDDiscountFactor(value);
                }
        }

        void TDProjection::connectNeurons(Neuron* neuron1, Neuron* neuron2)
        {
                TDConnection* c = new TDConnection(neuron1, neuron2, 
                        mTDConnectionType);

                c->setETraceDecayFactor(mETraceDecayFactor);
                c->setTDDiscountFactor(mTDDiscountFactor);

                // Tell the pre-synaptic Neuron that this connection is one of its 
                // axons.
                neuron1->addAxon(c);

                // Tell the post-synaptic Neuron that this connection is one of its 
                // dendrites.
                neuron2->addDendrite(c);

                mConnections.push_back(c);
        }
}

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