1 files changed, 77 insertions, 0 deletions
diff --git a/chaos/src/henon_map.hpp b/chaos/src/henon_map.hpp
new file mode 100644
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+++ b/chaos/src/henon_map.hpp
@@ -0,0 +1,77 @@
+// 
+//  
+//  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"
+
+//  henon map: x[n+1] = y[n] + 1 - a * x[n] * x[n]
+//             y[n+1] = b * x[n]
+//             b != 0  
+//  taken from Willi-Hans Steeb: Chaos and Fractals
+
+class henon:
+	public map_base<2>
+{
+public:
+	henon()
+	{
+		CHAOS_SYS_INIT(x,0,0);
+		CHAOS_SYS_INIT(y,0,1);
+
+		CHAOS_PAR_INIT(a,1.4);
+		CHAOS_PAR_INIT(b,0.3);
+	}
+
+
+	void m_step()
+	{
+		data_t x = m_data[0];
+		data_t y = m_data[1];
+		
+		m_data[0] = 1 + y - CHAOS_PARAMETER(a) * x * x;
+		m_data[1] = CHAOS_PARAMETER(b) * x;
+	}
+	
+	CHAOS_SYSVAR_FUNCS(x, 0);
+	CHAOS_SYSVAR_FUNCS(y, 1);
+
+	CHAOS_SYSPAR_FUNCS(a);
+
+	CHAOS_SYSPAR_FUNCS_PRED(b, m_pred_b);
+	bool m_pred_b(t_float f)
+	{
+		return (f != 0);
+	}
+};
+
+
+#define HENON_CALLBACKS							\
+MAP_CALLBACKS;									\
+CHAOS_SYS_CALLBACKS(a);							\
+CHAOS_SYS_CALLBACKS(b);							\
+CHAOS_SYS_CALLBACKS(x);							\
+CHAOS_SYS_CALLBACKS(y);
+
+#define HENON_ATTRIBUTES						\
+MAP_ATTRIBUTES;									\
+CHAOS_SYS_ATTRIBUTE(a);							\
+CHAOS_SYS_ATTRIBUTE(b);							\
+CHAOS_SYS_ATTRIBUTE(x);							\
+CHAOS_SYS_ATTRIBUTE(y);
+