Projection.h

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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.                *
************************************************************************/

#ifndef VERVE_PROJECTION_H
#define VERVE_PROJECTION_H

#include "Globals.h"

namespace verve
{
        class Population;
        class Neuron;
        class Connection;

        enum InitialWeightMethod
        {
                IDEAL_NOISE,

                WEIGHTS_NEAR_0,

                WEIGHTS_NEAR_1
        };

        class Projection
        {
        public:
                VERVE_DECL Projection();

                VERVE_DECL virtual ~Projection();

                VERVE_DECL virtual void VERVE_CALL init(Population* pop1, 
                        Population* pop2, InitialWeightMethod initWeightMethod, 
                        real maxInputPopActivationSum);

                VERVE_DECL virtual void VERVE_CALL init(Population* pop, 
                        Neuron* neuron, InitialWeightMethod initWeightMethod, 
                        real maxInputPopActivationSum);

                VERVE_DECL virtual void VERVE_CALL init(Neuron* neuron, 
                        Population* pop, InitialWeightMethod initWeightMethod, 
                        real maxInputPopActivationSum);

                VERVE_DECL virtual void VERVE_CALL resetShortTermMemory();

                VERVE_DECL virtual void VERVE_CALL addPreNeuron(Neuron* neuron);

                VERVE_DECL virtual unsigned int VERVE_CALL getNumConnections()const;

                VERVE_DECL virtual Connection* VERVE_CALL getConnection(
                        unsigned int i);

                //VERVE_DECL virtual void VERVE_CALL applyUniformNoise(real min, 
                //      real max);

                //VERVE_DECL virtual void VERVE_CALL applyGaussianNoise(real variance);

                //VERVE_DECL virtual void VERVE_CALL applyIdealInitialNoise();

        protected:
                void clear();

                void setInitialConnectionWeights();

                void setInitialConnectionWeight(Connection* c);

                void createConnections(Neuron* neuron, Population* pop);

                void storeTargetNeuronReferences(Population* pop);

                void storeTargetNeuronReferences(Neuron* neuron);

                virtual void connectNeurons(Neuron* neuron1, 
                        Neuron* neuron2);

                std::vector<Connection*> mConnections;

                std::vector<Neuron*> mTargetNeurons;

                InitialWeightMethod mInitialWeightMethod;

                real mMaxInputPopActivationSum;
        };
}

#endif

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