TripletDecayConnection.h

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/* 
* Copyright 2014-2018 Friedemann Zenke
*
* This file is part of Auryn, a simulation package for plastic
* spiking neural networks.
* 
* Auryn is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
* 
* Auryn 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
* GNU General Public License for more details.
* 
* You should have received a copy of the GNU General Public License
* along with Auryn.  If not, see <http://www.gnu.org/licenses/>.
*
* If you are using Auryn or parts of it for your work please cite:
* Zenke, F. and Gerstner, W., 2014. Limits to high-speed simulations 
* of spiking neural networks using general-purpose computers. 
* Front Neuroinform 8, 76. doi: 10.3389/fninf.2014.00076
*/

#ifndef TRIPLETDECAYCONNECTION_H_
#define TRIPLETDECAYCONNECTION_H_

#include "auryn_definitions.h"
#include "AurynVector.h"
#include "TripletConnection.h"
#include "Trace.h"

#define TRIPLETDECAYCONNECTION_EULERUPGRADE_STEP 0.999

namespace auryn {


class TripletDecayConnection : public TripletConnection
{

private:
        AurynTime decay_timestep;
        AurynFloat tau_decay;
        AurynFloat mul_decay;
        AurynWeight w_rest;
        AurynInt decay_count;

public:
        TripletDecayConnection(SpikingGroup * source, NeuronGroup * destination, TransmitterType transmitter);

        TripletDecayConnection(SpikingGroup * source, NeuronGroup * destination, 
                        const char * filename, 
                        AurynFloat tau_hom=10, 
                        AurynFloat eta=1, AurynFloat decay = 1e-3,
                        AurynFloat kappa=3., AurynWeight wrest=0., AurynWeight maxweight=1. , 
                        TransmitterType transmitter=GLUT);

        TripletDecayConnection(SpikingGroup * source, NeuronGroup * destination, 
                        AurynWeight weight, AurynFloat sparseness=0.05, 
                        AurynFloat tau_hom=10, 
                        AurynFloat eta=1, AurynFloat decay=1e-3,
                        AurynFloat kappa=3., AurynWeight wrest=0., AurynWeight maxweight=1. , 
                        TransmitterType transmitter=GLUT);

        virtual ~TripletDecayConnection();
        void init(AurynFloat decay, AurynWeight wrest);
        void free();

        virtual void propagate();

};

}

#endif /*TRIPLETDECAYCONNECTION_H_*/