// 
//  
//  chaos~
//  Copyright (C) 2004  Tim Blechmann
//  
//  This program 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 2 of the License, or
//  (at your option) any later version.
//  
//  This program 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 this program; see the file COPYING.  If not, write to
//  the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
//  Boston, MA 02111-1307, USA.

#include "map_base.hpp"

//  logistic map: x[n+1] = alpha * x[n] * (1 - x[n])
//                0 <= x[n]  <  1
//                0 <= alpha <= 4

class logistic:
	protected map_base
{
public:
	logistic()
		: m_alpha(3.8)
	{
		m_num_eq = 1;
		m_data = new data_t[1];
		set_x(0.5f);
	}

	~logistic()
	{
		delete m_data;
	}

	virtual void m_step()
	{
		data_t data = m_data[0];
		data_t alpha = m_alpha;
		m_data[0] = alpha * data * (1.f - data);
	}

	void set_alpha(t_float f)
	{
		if ( (f > 0) && (f < 4))
			m_alpha = (data_t) f;
		else
			post("value for alpha %f out of range", f);
	}

	t_float get_alpha()
	{
		return (t_float)m_alpha;
	}

	void set_x(t_float f)
	{
		if ( (f > 0) && (f < 1))
			m_data[0] = (data_t) f;
		else
			post("value for x %f out of range", f);
	}

	t_float get_x()
	{
		return (t_float)m_data[0];
	}

private:
	data_t m_alpha;
};

#define LOGISTIC_CALLBACKS									\
MAP_CALLBACKS;												\
FLEXT_CALLVAR_F(m_system->get_alpha, m_system->set_alpha);	\
FLEXT_CALLVAR_F(m_system->get_x, m_system->set_x);

#define LOGISTIC_ATTRIBUTES												\
MAP_ATTRIBUTES;															\
FLEXT_ADDATTR_VAR("alpha",m_system->get_alpha, m_system->set_alpha);	\
FLEXT_ADDATTR_VAR("x",m_system->get_x, m_system->set_x);