awesome-attractor/kernels/Lorenz3D.hpp

#ifndef LORENZ_HPP
#define LORENZ_HPP

#include "../AttractorKernel.hpp"

class Lorenz3D : public AttractorKernel {
private:
	void init() {
		std::fill_n(vectorOld, dimension, 1.0);
		std::fill_n(vectorNew, dimension, 1.0);
	}

public:
	Lorenz3D():
		AttractorKernel(3, 4) {
		init();
	}

	virtual std::string type() const { return "lorenz"; };

	virtual void generate_random_parameters() {
		parameters[0] = rand() / double(RAND_MAX) * 0.02;
		parameters[1] = rand() / double(RAND_MAX) * 4.0 + 8.0;
		parameters[2] = rand() / double(RAND_MAX) * 10.0 + 23.0;
		parameters[3] = rand() / double(RAND_MAX) * 4.0;
		init();
	}

	virtual void operator()() {
		std::swap(vectorNew, vectorOld);

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

};

#endif // LORENZ_HPP