1 files changed, 79 insertions, 0 deletions
diff --git a/chaos/src/logistic_map.hpp b/chaos/src/logistic_map.hpp
new file mode 100644
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--- /dev/null
+++ b/chaos/src/logistic_map.hpp
@@ -0,0 +1,79 @@
+// 
+//  
+//  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:
+	public map_base<1>
+{
+public:
+	logistic()
+	{
+		CHAOS_PAR_INIT(alpha, 3.8);
+		CHAOS_SYS_INIT(x, 0.5,0);
+	}
+
+	~logistic()
+	{
+	}
+
+	void m_step()
+	{
+		data_t x = m_data[0];
+		data_t alpha = CHAOS_PARAMETER(alpha);
+		m_data[0] = alpha * x * (1.f - x);
+	}
+
+	CHAOS_SYSPAR_FUNCS_PRED(alpha, m_pred_alpha);
+	bool m_pred_alpha(data_t f)
+	{
+		return (f > 0) && (f < 4);
+	}
+
+	CHAOS_SYSVAR_FUNCS_PRED(x, 0, m_pred_x);
+	
+	bool m_pred_x(data_t f)
+	{
+		return (f > 0) && (f < 1);
+	}
+
+	virtual void m_verify()
+	{
+		data_t x = m_data[0];
+		if (m_pred_x(x))
+			return;
+		m_data[0] = 0.5;
+	}
+};
+
+#define LOGISTIC_CALLBACKS						\
+MAP_CALLBACKS;									\
+CHAOS_SYS_CALLBACKS(alpha);						\
+CHAOS_SYS_CALLBACKS(x);
+
+#define LOGISTIC_ATTRIBUTES						\
+MAP_ATTRIBUTES;									\
+CHAOS_SYS_ATTRIBUTE(alpha);						\
+CHAOS_SYS_ATTRIBUTE(x);
+