1 files changed, 65 insertions, 0 deletions
diff --git a/chaos/src/bernoulli_map.hpp b/chaos/src/bernoulli_map.hpp
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+++ b/chaos/src/bernoulli_map.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 "map_base.hpp"
+
+//  bernoulli map: x[n+1] = 2 * x[n] mod 1             
+//                 0 <= x[n] <  1
+//  taken from Willi-Hans Steeb: Chaos and Fractals
+
+class bernoulli:
+	public map_base<1>
+{
+public:
+
+	bernoulli()
+	{
+		CHAOS_SYS_INIT(x,0.5,0);
+	}
+
+	void m_step()
+	{
+		data_t x = m_data[0];
+		
+		if (x <= 0)
+			x = 0.00001;  //stability
+
+		if (x < 0.5f)
+			m_data[0] = 2.f * x;
+		else
+			m_data[0] = 2.f * x - 1.f;
+	}
+
+	CHAOS_SYSVAR_FUNCS_PRED(x,0,m_pred_x);
+	bool m_pred_x(t_float f)
+	{
+		return (f >= 0) && (f < 1);
+	}
+};
+
+
+#define BERNOULLI_CALLBACKS						\
+MAP_CALLBACKS;									\
+CHAOS_SYS_CALLBACKS(x);
+
+
+#define BERNOULLI_ATTRIBUTES					\
+MAP_ATTRIBUTES;									\
+CHAOS_SYS_ATTRIBUTE(x);