TripletScalingConnection.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/>.
*/

#ifndef TRIPLETSCALINGCONNECTION_H_
#define TRIPLETSCALINGCONNECTION_H_

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

#define TRIPLETSCALINGCONNECTION_EULERUPGRADE_STEP 0.001


namespace auryn {
        class TripletScalingConnection : public DuplexConnection
        {

        private:
                void init(AurynFloat tau_hom, AurynFloat eta, AurynFloat kappa, AurynFloat beta, AurynFloat maxweight);
                void init_shortcuts();

                virtual AurynWeight get_hom(NeuronID i);

        protected:

                AurynFloat tau_plus;
                AurynFloat tau_minus;
                AurynFloat tau_long;

                AurynFloat tau_homeostatic;

                AurynTime scal_timestep;
                AurynFloat scal_beta;
                AurynFloat scal_mul;

                NeuronID * fwd_ind; 
                AurynWeight * fwd_data;

                NeuronID * bkw_ind; 
                AurynWeight ** bkw_data;

                AurynDouble hom_fudge;
                AurynDouble target_rate;

                Trace * tr_pre;
                Trace * tr_post;
                Trace * tr_post2;
                Trace * tr_post_hom;

                void propagate_forward();
                void propagate_backward();
                inline void evolve_scaling();
                void sort_spikes();

                AurynWeight dw_pre(NeuronID post);
                AurynWeight dw_post(NeuronID pre, NeuronID post);

        public:
                AurynFloat A3_plus;

                AurynFloat w_min;
                AurynFloat w_max;



                bool stdp_active;

                TripletScalingConnection(SpikingGroup * source, NeuronGroup * destination, 
                                TransmitterType transmitter=GLUT);

                TripletScalingConnection(SpikingGroup * source, NeuronGroup * destination, 
                                const char * filename, 
                                AurynFloat tau_hom=10, 
                                AurynFloat eta=1, 
                                AurynFloat kappa=3., 
                                AurynFloat beta=1.0, // TODO put sensical number
                                AurynFloat maxweight=1. , 
                                TransmitterType transmitter=GLUT);

                TripletScalingConnection(SpikingGroup * source, NeuronGroup * destination, 
                                AurynWeight weight, AurynFloat sparseness=0.05, 
                                AurynFloat tau_hom=10, 
                                AurynFloat eta=1, 
                                AurynFloat kappa=3., 
                                AurynFloat beta=1.0, // TODO put sensical number
                                AurynFloat maxweight=1. , 
                                TransmitterType transmitter=GLUT,
                                string name = "TripletScalingConnection" );

                virtual ~TripletScalingConnection();
                virtual void finalize();
                void free();

                void set_min_weight(AurynWeight min);
                void set_max_weight(AurynWeight max);
                void set_hom_trace(AurynFloat freq);
                void set_beta(AurynFloat beta);

                AurynWeight get_wmin();

                virtual void propagate();
                virtual void evolve();

        };
}

#endif /*TRIPLETSCALINGCONNECTION_H_*/