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//
//
// 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);
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