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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/bungalow_tent_map.hpp
parent90c6018a9401e38859f733b3521c919e042322b7 (diff)
parent6932ee2d22511226378218992b0005cb01eb235e (diff)
- abstractions/tb - externals/tb
Diffstat (limited to 'chaos/src/bungalow_tent_map.hpp')
-rw-r--r--chaos/src/bungalow_tent_map.hpp94
1 files changed, 94 insertions, 0 deletions
diff --git a/chaos/src/bungalow_tent_map.hpp b/chaos/src/bungalow_tent_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"
+
+// bungalow_tent map: x[n+1] = 1 + 2 * r + 2 * (r + 1) * x[n]
+// (for -1 <= x[n] < -0.5f)
+// 1 + 2 * (1 - r) * (x[n])
+// (for -0.5 <= x[n] < 0)
+// 1 + 2 * (r - 1) * (x[n])
+// (for 0 <= x[n] < 0.5)
+// 1 + 2 * r - 2 * (r + 1) * (x[n])
+// (for 0.5 <= x[n] < 1)
+// -1 <= x[n] < 1
+// -0.5 <= r < 1
+// taken from Willi-Hans Steeb: Chaos and Fractals
+
+class bungalow_tent:
+ public map_base<1>
+{
+public:
+ bungalow_tent()
+ {
+ CHAOS_SYS_INIT(x, 0.6,0);
+ CHAOS_PAR_INIT(r, 0.5);
+ }
+
+ void m_step()
+ {
+ data_t x = m_data[0];
+ data_t r = CHAOS_PARAMETER(r);
+
+ if ( x < - 0.5)
+ {
+ m_data[0] = 1 + 2 * r + 2 * (r + 1) * x;
+ return;
+ }
+ if ( x < 0)
+ {
+ m_data[0] = 1 + 2 * (1 - r) * x;
+ return;
+ }
+ if ( x < 0.5)
+ {
+ m_data[0] = 1 + 2 * (r - 1) * x;
+ return;
+ }
+ else
+ {
+ m_data[0] = 1 + 2 * r - 2 * (r + 1) * x;
+ return;
+ }
+
+ }
+
+ CHAOS_SYSVAR_FUNCS_PRED(x, 0, m_pred_x);
+ bool m_pred_x(t_float f)
+ {
+ return (f >= -1) && (f < 1);
+ }
+
+ CHAOS_SYSPAR_FUNCS_PRED(r, m_pred_r);
+ bool m_pred_r(t_float f)
+ {
+ return (f >= -0.5) && (f < 1);
+ }
+};
+
+#define BUNGALOW_TENT_CALLBACKS \
+MAP_CALLBACKS; \
+CHAOS_SYS_CALLBACKS(x); \
+CHAOS_SYS_CALLBACKS(r);
+
+#define BUNGALOW_TENT_ATTRIBUTES \
+MAP_ATTRIBUTES; \
+CHAOS_SYS_ATTRIBUTE(x) \
+CHAOS_SYS_ATTRIBUTE(r)