Merge branchesHEADsvn2git-headmaster

- abstractions/tb
- externals/tb

1 files changed, 101 insertions, 0 deletions

diff --git a/chaos/src/lorenz.hpp b/chaos/src/lorenz.hpp
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+++ b/chaos/src/lorenz.hpp
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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 "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
+	: public ode_base<3>
+{
+public:
+	lorenz()
+	{
+		CHAOS_PAR_INIT(method,0);
+		CHAOS_PAR_INIT(dt,0.01);
+
+		CHAOS_SYS_INIT(x1,0.8,0);
+		CHAOS_SYS_INIT(x2,0.7,1);
+		CHAOS_SYS_INIT(x3,0.6,2);
+
+		CHAOS_PAR_INIT(sigma,16);
+		CHAOS_PAR_INIT(b,4);
+		CHAOS_PAR_INIT(r,40);
+	}
+	
+	~lorenz()
+	{
+	}
+
+	virtual void m_system(data_t* deriv, data_t* data)
+	{
+		data_t x1 = data[0], x2 = data[1], x3 = data[2];
+		
+		deriv[0] = CHAOS_PARAMETER(sigma) * (x2 - x1);
+		deriv[1] = - x1 * x3 + CHAOS_PARAMETER(r) * x1 - x2;
+		deriv[2] = x1 * x2 - CHAOS_PARAMETER(b) * x3;
+	}
+	
+
+	/* function has a fix point for x1 == x2 == x3 == 0 */
+	virtual void m_verify() 
+	{
+		if (m_data[0] == 0 && m_data[1] == 0 && m_data[2] == 0)
+			for (int i = 0; i != 3; ++i)
+				m_data[i] = rand_range(0,3);
+	}
+
+
+	CHAOS_SYSVAR_FUNCS(x1, 0);
+	CHAOS_SYSVAR_FUNCS(x2, 1);
+	CHAOS_SYSVAR_FUNCS(x3, 2);
+
+	CHAOS_SYSPAR_FUNCS_PRED(sigma, m_pred);
+	CHAOS_SYSPAR_FUNCS_PRED(b, m_pred);
+	CHAOS_SYSPAR_FUNCS_PRED(r, m_pred);
+
+	bool m_pred (t_float f)
+	{
+		return (f > 0);
+	}
+
+};
+
+
+#define LORENZ_CALLBACKS						\
+ODE_CALLBACKS;									\
+CHAOS_SYS_CALLBACKS(x1);						\
+CHAOS_SYS_CALLBACKS(x2);						\
+CHAOS_SYS_CALLBACKS(x3);						\
+CHAOS_SYS_CALLBACKS(sigma);						\
+CHAOS_SYS_CALLBACKS(r);							\
+CHAOS_SYS_CALLBACKS(b);
+
+#define LORENZ_ATTRIBUTES						\
+ODE_ATTRIBUTES;									\
+CHAOS_SYS_ATTRIBUTE(x1);						\
+CHAOS_SYS_ATTRIBUTE(x2);						\
+CHAOS_SYS_ATTRIBUTE(x3);						\
+CHAOS_SYS_ATTRIBUTE(sigma);						\
+CHAOS_SYS_ATTRIBUTE(r);							\
+CHAOS_SYS_ATTRIBUTE(b);