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/logistic_map.hpp | 91 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 91 insertions(+)
 create mode 100644 chaos/src/logistic_map.hpp

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

diff --git a/chaos/src/logistic_map.hpp b/chaos/src/logistic_map.hpp
new file mode 100644
index 0000000..c443f45
--- /dev/null
+++ b/chaos/src/logistic_map.hpp
@@ -0,0 +1,91 @@
+// 
+//  
+//  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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