awesome-attractor/kernels/Lorenz3D.cpp

#include "Lorenz3D.hpp"

const static unsigned int dimension = 3;
const static unsigned int numberOfParameters = 4;

Lorenz3D::Lorenz3D() {
    init();
}

void Lorenz3D::init() {
    // allocation
    myParameters = new double[numberOfParameters];
    vectorNew = new double[dimension];
    vectorOld = new double[dimension];

    // initialisation
    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] = 1.0;
    }
}

// the main function
void Lorenz3D::iterate() {
    swap(vectorNew, vectorOld);

    vectorNew[0] = vectorOld[0] + myParameters[0] * myParameters[1] * (vectorOld[1] - vectorOld[0]);
    vectorNew[1] = vectorOld[1] + myParameters[0] * (vectorOld[0] * (myParameters[2] - vectorOld[2]) - vectorOld[1]);
    vectorNew[2] = vectorOld[2] + myParameters[0] * (vectorOld[0] * vectorOld[1] - myParameters[3] * vectorOld[2]);
}

/*
4D:
    new_point[0] = point[0] + param[0] * param[1] * (point[1] - point[0]);
    new_point[1] = point[1] + param[0] * (point[0] * (param[2] - point[2]) - point[1] + point[3]);
    new_point[2] = point[2] + param[0] * (point[0] * point[1] - param[3] * point[2]);
    new_point[3] = point[3] - param[0] * param[4] * point[0];
    break;
*/

// setters, getters, all i/o to other classes/objects
void * Lorenz3D::getProperty(const string identifier) {
    if ( identifier == "dimension" ) {
        unsigned int * _return = new unsigned int;
        *_return = dimension;
        return _return;
    }
    return NULL;
}

void Lorenz3D::setProperty(const string identifier, const void * value) {
    return;
}

double * & Lorenz3D::parameters() {
    return myParameters;
}

double & Lorenz3D::parameter(const unsigned int index) {
    return myParameters[index];
}

unsigned int Lorenz3D::getNumberOfParameters() {
    return numberOfParameters;
}

double * & Lorenz3D::vector() {
    return vectorNew;
}

double * & Lorenz3D::previousVector() {
    return vectorOld;
}