PoissonGroup.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 POISSONGROUP_H_
#define POISSONGROUP_H_

#include "auryn_definitions.h"
#include "AurynVector.h"
#include "System.h"
#include "SpikingGroup.h"

#include <boost/random/mersenne_twister.hpp>
#include <boost/random/uniform_int.hpp>
#include <boost/random/variate_generator.hpp>
#include <boost/random/exponential_distribution.hpp>

namespace auryn {

class PoissonGroup : public SpikingGroup
{
private:
        AurynTime * clk;
        AurynDouble lambda;
        static boost::mt19937 gen; 
        boost::exponential_distribution<> * dist;
        boost::variate_generator<boost::mt19937&, boost::exponential_distribution<> > * die;

        unsigned int salt;

        void init(AurynDouble rate);

protected:
        NeuronID x;
        
public:
        PoissonGroup(NeuronID n, AurynDouble rate=5. );
        virtual ~PoissonGroup();
        virtual void evolve();
        void set_rate(AurynDouble rate);
        AurynDouble get_rate();
        void seed(unsigned int s);
};

}

#endif /*POISSONGROUP_H_*/