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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"
// henon map: x[n+1] = y[n] + 1 - a * x[n] * x[n]
// y[n+1] = b * x[n]
// b != 0
// taken from Willi-Hans Steeb: Chaos and Fractals
class henon:
protected map_base
{
public:
henon()
: m_a(1.4), m_b(0.3)
{
m_num_eq = 2;
m_data = new data_t[1];
set_x(0.f);
set_y(0.f);
}
~henon()
{
delete m_data;
}
virtual void m_step()
{
data_t x = m_data[0];
data_t y = m_data[1];
m_data[0] = 1 + y - m_a * x * x;
m_data[1] = m_b * x;
}
void set_x(t_float f)
{
m_data[0] = (data_t) f;
}
t_float get_x()
{
return (t_float)m_data[0];
}
void set_y(t_float f)
{
m_data[1] = (data_t) f;
}
t_float get_y()
{
return (t_float)m_data[1];
}
void set_a(t_float f)
{
m_a = (data_t) f;
}
t_float get_a()
{
return (t_float)m_a;
}
void set_b(t_float f)
{
if (f != 0)
m_b = (data_t) f;
else
post("value for b %f out of range", f);
}
t_float get_b()
{
return (t_float)m_b;
}
private:
data_t m_a;
data_t m_b;
};
#define HENON_CALLBACKS \
MAP_CALLBACKS; \
FLEXT_CALLVAR_F(m_system->get_a, m_system->set_a); \
FLEXT_CALLVAR_F(m_system->get_b, m_system->set_b); \
FLEXT_CALLVAR_F(m_system->get_x, m_system->set_x); \
FLEXT_CALLVAR_F(m_system->get_y, m_system->set_y);
#define HENON_ATTRIBUTES \
MAP_ATTRIBUTES; \
FLEXT_ADDATTR_VAR("a",m_system->get_a, m_system->set_a); \
FLEXT_ADDATTR_VAR("b",m_system->get_b, m_system->set_b); \
FLEXT_ADDATTR_VAR("x",m_system->get_x, m_system->set_x); \
FLEXT_ADDATTR_VAR("y",m_system->get_y, m_system->set_y);
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