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connection.cc

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#include <magic/mclass.h>
#include <magic/mtextstream.h>

#include "inanna/neuron.h"
#include "inanna/connection.h"

impl_dynamic (Connection, {Object});


//             ___                                   o                       //
//            /   \        _     _    ___   ___   |           _              //
//            |      __  |/ \  |/ \  /   ) |   \ -+- |  __  |/ \             //
//            |     /  \ |   | |   | |---  |      |  | /  \ |   |            //
//            \___/ \__/ |   | |   |  \__   \__/   \ | \__/ |   |            //

Connection::Connection (const Neuron* source, const Neuron* target, double weight)
{
    mpSource = const_cast<Neuron*>(source);
    mpTarget = const_cast<Neuron*>(target);
    mWeight  = weight;
}

Connection::~Connection ()
{
    if (mpSource)
        mpSource->disconnectTo (*this);
    if (mpTarget)
        mpTarget->disconnectFrom (*this);
}

void Connection::init (double r)
{
    mWeight = 2*r*frnd()-r;
}

double Connection::transfer ()
{
    return mWeight * mpSource->output();
}

void Connection::copy (const Connection& other)
{
    mWeight = other.weight();
#ifdef CMP_WARNINGS
#warning "TODO: Copying connections not implemented"
#endif
    mpSource = NULL;
    mpTarget = NULL;
}


void Connection::check (int netSize) const
{
    ASSERT (mpSource!=NULL);
    ASSERT (mpTarget!=NULL);
}

void Connection::writeXML (TextOStream& out) const
{
    sout.printf ("\t\t<%s>", (CONSTR) getclassname());
    if (mpSource)
        sout.printf ("<SOURCEID>%d</SOURCEID>", mpSource->id());
    sout.printf ("<WEIGHT>%f</WEIGHT>", mWeight);
    sout.printf ("</%s>\n", (CONSTR) getclassname());
}

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