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authorIOhannes m zmölnig <zmoelnig@iem.at>2015-10-14 15:14:38 +0200
committerIOhannes m zmölnig <zmoelnig@iem.at>2015-10-14 15:14:38 +0200
commit28b7e464fd119b8c848753a1f41070422c463c41 (patch)
tree07449abdf85d8f1fd4068839b974242b429720ca /chaos/src/lozi_map.hpp
parent90c6018a9401e38859f733b3521c919e042322b7 (diff)
parent6932ee2d22511226378218992b0005cb01eb235e (diff)
- abstractions/tb - externals/tb
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diff --git a/chaos/src/lozi_map.hpp b/chaos/src/lozi_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"
+
+// lozi map: x[n+1] = y[n] + 1 - a * abs(x[n])
+// y[n+1] = b * x[n]
+// b != 0
+// taken from Willi-Hans Steeb: Chaos and Fractals
+
+class lozi_map:
+ public map_base<2>
+{
+public:
+ lozi_map()
+ {
+ 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];
+
+ if (x > 0)
+ m_data[0] = 1 + y - CHAOS_PARAMETER(a) * x;
+ else
+ m_data[0] = 1 + y + CHAOS_PARAMETER(a) * 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 LOZI_MAP_CALLBACKS \
+MAP_CALLBACKS; \
+CHAOS_SYS_CALLBACKS(a); \
+CHAOS_SYS_CALLBACKS(b); \
+CHAOS_SYS_CALLBACKS(x); \
+CHAOS_SYS_CALLBACKS(y);
+
+#define LOZI_MAP_ATTRIBUTES \
+MAP_ATTRIBUTES; \
+CHAOS_SYS_ATTRIBUTE(a); \
+CHAOS_SYS_ATTRIBUTE(b); \
+CHAOS_SYS_ATTRIBUTE(x); \
+CHAOS_SYS_ATTRIBUTE(y);