awesome-attractor/kernels/Logistic.cpp

//
//  $filename
//  $projectname
//
//  Created by Joshua moerman on $TODAY.
//  Copyright 2010 Joshua Moerman. All rights reserved.
//

#include "Logistic.hpp"

Logistic::Logistic():
        myParameters(NULL), vectorNew(NULL), vectorOld(NULL) {
    dimension = 3;

    init();
}

Logistic::Logistic(const unsigned int dimension):
        myParameters(NULL), vectorNew(NULL), vectorOld(NULL), dimension(dimension) {
    init();
}

void Logistic::init() {
    const unsigned int numberOfParameters = dimension;

    if ( myParameters != NULL ) {
        delete myParameters;
    }
    myParameters = new double[numberOfParameters];

    if ( vectorNew != NULL ) {
        delete vectorNew;
    }
    vectorNew = new double[dimension];

    if ( vectorOld != NULL ) {
        delete vectorOld;
    }
    vectorOld = new double[dimension];

    assert(myParameters != NULL);
    assert(vectorNew != NULL);
    assert(vectorOld != NULL);
    for ( unsigned int i = 0; i < numberOfParameters; i++ ) {
        myParameters[i] = 0.0;
    }
    for ( unsigned int i = 0; i < dimension; i++ ) {
        vectorNew[i] = vectorOld[i] = 0.5;
    }
}

void Logistic::iterate() {
    swap(vectorNew, vectorOld);

    for ( unsigned int i = 0; i < dimension; i++ ) {
        vectorNew[i] = myParameters[i]*vectorOld[i]*(1.0 - vectorOld[i]);
    }
}


// setters, getters, all i/o to other classes/objects
void * Logistic::getProperty(const string identifier) {
    if ( identifier == "dimension" ) {
        unsigned int * _return = new unsigned int;
        *_return = dimension;
        return _return;
    }
    return NULL;
}

void Logistic::setProperty(const string identifier, const void * _value) {
    if ( identifier == "dimension" ) {
        unsigned int * value = (unsigned int*) _value;
        dimension = *value;
        init();
    }
}

double * & Logistic::parameters() {
    return myParameters;
}

double & Logistic::parameter(const unsigned int index) {
    return myParameters[index];
}

unsigned int Logistic::getNumberOfParameters() {
    return dimension;
}

double * & Logistic::vector() {
    return vectorNew;
}

double * & Logistic::previousVector() {
    return vectorOld;
}