From 5233c01a26329306c9f1d08c1a39733aee2cc518 Mon Sep 17 00:00:00 2001
From: Tim Blechmann <timblech@users.sourceforge.net>
Date: Tue, 21 Dec 2004 09:22:10 +0000
Subject: This commit was generated by cvs2svn to compensate for changes in
 r2423, which included commits to RCS files with non-trunk default branches.

svn path=/trunk/externals/tb/; revision=2424
---
 chaos/src/lorenz.hpp | 150 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 150 insertions(+)
 create mode 100644 chaos/src/lorenz.hpp

(limited to 'chaos/src/lorenz.hpp')

diff --git a/chaos/src/lorenz.hpp b/chaos/src/lorenz.hpp
new file mode 100644
index 0000000..70dad4d
--- /dev/null
+++ b/chaos/src/lorenz.hpp
@@ -0,0 +1,150 @@
+// 
+//  
+//  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 "ode_base.hpp"
+
+//  lorenz model: dx1/dt = sigma * (x2 - x1)
+//                dx2/dt = - x1 * x3 + r * x1 - x2
+//                dx3/dt = x1 * x2 - b * x3
+//  taken from Willi-Hans Steeb: Chaos and Fractals
+
+class lorenz
+	: protected ode_base
+{
+public:
+	logistic()
+		: m_sigma(16), m_b(4), m_r(40)
+	{
+		m_num_eq = 3;
+		m_data = new data_t[3];
+		set_x1(0.8f);
+		set_x2(0.8f);
+		set_x3(0.8f);
+		set_method(0);
+	}
+	
+	~logistic()
+	{
+		delete m_data;
+	}
+
+	virtual void m_system(data_t* deriv, data_t* data)
+	{
+		data_t x1 = data[0], x2 = data[1], x3 = data[2];
+		
+		deriv[0] = m_sigma * (x2 - x1);
+		deriv[1] = - x1 * x3 + m_r * x1 - x2;
+		deriv[3] = x1 * x2 - m_b * x3;
+	}
+	
+	void set_x1(t_float f)
+	{
+		m_data[0] = (data_t) f;
+	}
+
+	t_float get_x1()
+	{
+		return (t_float)m_data[0];
+	}
+
+	void set_x2(t_float f)
+	{
+		m_data[1] = (data_t) f;
+	}
+
+	t_float get_x2()
+	{
+		return (t_float)m_data[1];
+	}
+
+	void set_x3(t_float f)
+	{
+		m_data[2] = (data_t) f;
+	}
+
+	t_float get_x3()
+	{
+		return (t_float)m_data[2];
+	}
+
+
+	void set_sigma(t_float f)
+	{
+		if (f > 0)
+			m_sigma = (data_t) f;
+		else
+			post("value for sigma %f out of range", f);
+	}
+
+	t_float get_sigma()
+	{
+		return (t_float)m_sigma;
+	}
+
+
+	void set_r(t_float f)
+	{
+		if (f > 0)
+			m_r = (data_t) f;
+		else
+			post("value for r %f out of range", f);
+	}
+
+	t_float get_r()
+	{
+		return (t_float)m_r;
+	}
+
+	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_sigma, m_r, m_b;
+};
+
+
+#define LORENZ_CALLBACKS									\
+ODE_CALLBACKS;												\
+FLEXT_CALLVAR_F(m_system->get_sigma, m_system->set_sigma);	\
+FLEXT_CALLVAR_F(m_system->get_r, m_system->set_r);			\
+FLEXT_CALLVAR_F(m_system->get_b, m_system->set_b);			\
+FLEXT_CALLVAR_F(m_system->get_x1, m_system->set_x1);		\
+FLEXT_CALLVAR_F(m_system->get_x2, m_system->set_x2);		\
+FLEXT_CALLVAR_F(m_system->get_x3, m_system->set_x3);
+
+#define LORENZ_ATTRIBUTES												\
+ODE_ATTRIBUTES;															\
+FLEXT_ADDATTR_VAR("sigma",m_system->get_sigma, m_system->set_sigma);	\
+FLEXT_ADDATTR_VAR("r",m_system->get_r, m_system->set_r);				\
+FLEXT_ADDATTR_VAR("b",m_system->get_g, m_system->set_g);				\
+FLEXT_ADDATTR_VAR("x1",m_system->get_x1, m_system->set_x1);				\
+FLEXT_ADDATTR_VAR("x2",m_system->get_x2, m_system->set_x2);				\
+FLEXT_ADDATTR_VAR("x3",m_system->get_x3, m_system->set_x3);
-- 
cgit v1.2.1