First upload of chaos externals!svn2git-root

svn path=/trunk/externals/bbogart/chaos/; revision=92

12 files changed, 1059 insertions, 0 deletions

diff --git a/COPYING.txt b/COPYING.txt
new file mode 100644
index 0000000..486449c
--- /dev/null
+++ b/COPYING.txt
@@ -0,0 +1,340 @@
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diff --git a/README.build.txt b/README.build.txt
new file mode 100644
index 0000000..dd94ed2
--- /dev/null
+++ b/README.build.txt
@@ -0,0 +1,13 @@
+These objects where developed under Linux and have only been tested 
+in Linux. The objects should also compile under Windows and IRIX. 
+OSX should be soon added to the makefile.
+
+To build (under linux):
+
+make pd_linux
+
+For build instructions for other platforms consult the makefile.
+
+To Install:
+
+Copy the .pd* files where PD will seem them, like the "extra" folder.
diff --git a/README.txt b/README.txt
new file mode 100644
index 0000000..c8519ec
--- /dev/null
+++ b/README.txt
@@ -0,0 +1,44 @@
+This is the readme for "Chaos PD Externals" a set of objects for PD which 
+calculate various "Chaotic Attractors"; including, Lorenz, Rossler, Henon 
+and Ikeda. Hopefully more will be on thier way. 
+
+If you have any questions/comments you can reach me at ben@ekran.org
+
+Please Note:
+These programs are Copyright Ben Bogart 2002
+
+These programs are distributed under the terms of the GNU General Public 
+License 
+
+Chaos PD Externals are free software; you can redistribute them and/or modify
+them 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.
+
+Chaos PD Externals are distributed in the hope that they 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 the Chaos PD Externals; if not, write to the Free Software
+Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
+USAGE:
+
+The package only includes 2 and 3 dimentional attractors. There are
+outlets for each dimention. The scale of the values vary between the
+different attractors. The object methods are as follows:
+
+bang:	Calculate one interation of the attractor.
+reset:	Reset to initial conditions.
+param:  Modify the paramaters of the equation, the number of args depend
+	on the attractor. (Be careful with the parameters, an attractor
+	will go from stable to infinity in very few interations.)
+
+See the example patches for clarification.
+
+
+Have fun with them, I'd be happy to hear about any interesting uses you
+find for them. As well as any interesting attractor equations you come
+across.
diff --git a/henon.c b/henon.c
new file mode 100644
index 0000000..21dbad1
--- /dev/null
+++ b/henon.c
@@ -0,0 +1,110 @@
+///////////////////////////////////////////////////////////////////////////////////
+/* Henon's Attractor PD External                                                 */
+/* Copyright Ben Bogart 2002                                                     */
+/* This program is distributed under the terms of the GNU General Public License */
+///////////////////////////////////////////////////////////////////////////////////
+
+///////////////////////////////////////////////////////////////////////////////////
+/* This file is part of Chaos PD Externals.                                      */
+/*                                                                               */
+/* Chaos PD Externals are free software; you can redistribute them and/or modify */
+/* them 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.                                           */
+/*                                                                               */
+/* Chaos PD Externals are distributed in the hope that they 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 the Chaos PD Externals; if not, write to the Free Software         */
+/* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA     */
+///////////////////////////////////////////////////////////////////////////////////
+
+#include "m_pd.h"
+#include <math.h>
+
+t_class *myclass;
+
+typedef struct thisismystruct
+{
+	t_object myobj;
+	double a,b,lx0,ly0;
+	t_outlet *y_outlet;
+}	mystruct;
+
+static void calculate(mystruct *x)
+{
+	double lx0,ly0,lx1,ly1;
+	double a,b;
+
+	a = x->a;
+	b = x->b;
+	lx0 = x->lx0;
+	ly0 = x->ly0;
+
+	lx1 = (ly0 + 1) - (a * pow(lx0,2));
+	ly1 = b * lx0;
+	x->lx0 = lx1;
+	x->ly0 = ly1;
+
+	outlet_float(x->myobj.ob_outlet, (t_float)lx1);
+	outlet_float(x->y_outlet, (t_float)ly1);
+}
+
+static void reset(mystruct *x)
+{
+	x->lx0 = 1;
+        x->ly0 = 1;
+}
+
+static void param(mystruct *x, t_floatarg a, t_floatarg b)
+{
+        x->a = (double)a;
+        x->b = (double)b;
+}
+
+void *henon_new(void)
+{
+        mystruct *x = (mystruct *)pd_new(myclass);
+	x->a = 1.4;
+	x->b = 0.3;
+	x->lx0 = 1;
+	x->ly0 = 1;
+     
+        outlet_new(&x->myobj, &s_float);		/* Default float outlet */
+	x->y_outlet = outlet_new(&x->myobj, &s_float);  /* New Outlet */
+        return (void *)x;
+}
+
+
+void henon_setup(void)
+{
+	post("-------------------------");		/* Copyright info */
+	post("Chaos PD Externals");
+	post("Copyright Ben Bogart 2002");
+	post("-------------------------");
+
+	myclass = class_new(gensym("henon"),		/* symname is the symbolic name */
+	(t_newmethod)henon_new,				/* Constructor Function */
+	0,						/* Destructor Function */
+	sizeof(mystruct),				/* Size of the structure */
+	CLASS_DEFAULT,					/* Graphical Representation */
+	0);						/* 0 Terminates Argument List */
+
+	class_addbang(myclass, (t_method)calculate);
+	class_addmethod(myclass,
+			(t_method)reset,
+			gensym("reset"),
+			0);
+
+        class_addmethod(myclass,
+                        (t_method)param,
+                        gensym("param"),
+                        A_DEFFLOAT,
+                        A_DEFFLOAT,
+                        0);
+}
+
+
diff --git a/henon.pd b/henon.pd
new file mode 100644
index 0000000..dc90e54
--- /dev/null
+++ b/henon.pd
@@ -0,0 +1,24 @@
+#N canvas 48 298 368 335 10;
+#X obj 29 114 metro 50;
+#X obj 29 90 tgl 15 0 empty empty empty 20 8 0 8 -262144 -1 -1 0 1
+;
+#X floatatom 80 89 5 0 0;
+#X msg 114 143 reset;
+#X floatatom 74 285 5 0 0;
+#X text 5 66 Calculate;
+#X text 113 161 Reset To Initial Conditions;
+#X text 115 212 Modify Parameters;
+#X floatatom 29 285 5 0 0;
+#X text 23 264 Output;
+#X text 4 21 Chaos PD Externals - Copyright Ben Bogart 2002;
+#X msg 117 195 param 1.4 0.3;
+#X obj 29 177 henon;
+#X text 5 6 Henon's Attractor;
+#X text 3 37 (This attractor is not continuous);
+#X connect 0 0 12 0;
+#X connect 1 0 0 0;
+#X connect 2 0 0 1;
+#X connect 3 0 12 0;
+#X connect 11 0 12 0;
+#X connect 12 0 8 0;
+#X connect 12 1 4 0;
diff --git a/ikeda.c b/ikeda.c
new file mode 100644
index 0000000..2510d3e
--- /dev/null
+++ b/ikeda.c
@@ -0,0 +1,124 @@
+///////////////////////////////////////////////////////////////////////////////////
+/* Ikeda Attractor PD External                                                   */
+/* Copyright Ben Bogart 2002                                                     */
+/* This program is distributed under the terms of the GNU General Public License */
+///////////////////////////////////////////////////////////////////////////////////
+
+///////////////////////////////////////////////////////////////////////////////////
+/* This file is part of Chaos PD Externals.                                      */
+/*                                                                               */
+/* Chaos PD Externals are free software; you can redistribute them and/or modify */
+/* them 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.                                           */
+/*                                                                               */
+/* Chaos PD Externals are distributed in the hope that they 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 the Chaos PD Externals; if not, write to the Free Software         */
+/* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA     */
+///////////////////////////////////////////////////////////////////////////////////
+
+#include "m_pd.h"
+#include <math.h>
+
+
+t_class *myclass;
+
+typedef struct thisismystruct
+{
+	t_object myobj;
+	double a,b,c,rho,lx0,ly0;
+	t_outlet *y_outlet;
+}	mystruct;
+
+static void calculate(mystruct *x)
+{
+	double lx0,ly0,lx1,ly1;
+	double a,b,c,rho,tmp,cos_tmp,sin_tmp;
+
+	a = x->a;
+	b = x->b;
+	c = x->c;
+	rho = x->rho;
+	lx0 = x->lx0;
+	ly0 = x->ly0;
+
+
+	tmp = a - c / ( 1.0 + lx0*lx0 + ly0*ly0);
+	sin_tmp = sin(tmp);
+	cos_tmp = cos(tmp);
+
+	lx1 = rho + b * ( lx0 * cos_tmp - ly0 * sin_tmp);
+	ly1 = b * ( lx0 * sin_tmp + ly0 * cos_tmp);
+	x->lx0 = lx1;
+	x->ly0 = ly1;
+
+	outlet_float(x->myobj.ob_outlet, (t_float)lx1);
+	outlet_float(x->y_outlet, (t_float)ly1);
+}
+
+static void reset(mystruct *x)
+{
+	x->lx0 = 0.1;
+        x->ly0 = 0.1;
+}
+
+static void param(mystruct *x, t_floatarg a, t_floatarg b, t_floatarg c, t_floatarg rho)
+{
+        x->a = (double)a;
+        x->b = (double)b;
+	x->c = (double)c;
+	x->rho = (double)rho;
+}
+
+void *ikeda_new(void)
+{
+        mystruct *x = (mystruct *)pd_new(myclass);
+	x->a = 0.4;
+	x->b = 0.9;
+	x->c = 6.0;
+	x->rho = 1.0;
+	x->lx0 = 0.1;
+	x->ly0 = 0.1;
+     
+        outlet_new(&x->myobj, &s_float);		/* Default float outlet */
+	x->y_outlet = outlet_new(&x->myobj, &s_float);  /* New Outlet */
+        return (void *)x;
+}
+
+
+void ikeda_setup(void)
+{
+        post("-------------------------");              /* Copyright info */
+        post("Chaos PD Externals");
+        post("Copyright Ben Bogart 2002");
+        post("-------------------------");
+
+	myclass = class_new(gensym("ikeda"),		/* symname is the symbolic name */
+	(t_newmethod)ikeda_new,				/* Constructor Function */
+	0,						/* Destructor Function */
+	sizeof(mystruct),				/* Size of the structure */
+	CLASS_DEFAULT,					/* Graphical Representation */
+	0);						/* 0 Terminates Argument List */
+
+	class_addbang(myclass, (t_method)calculate);
+	class_addmethod(myclass,
+			(t_method)reset,
+			gensym("reset"),
+			0);
+
+        class_addmethod(myclass,
+                        (t_method)param,
+                        gensym("param"),
+                        A_DEFFLOAT,
+                        A_DEFFLOAT,
+			A_DEFFLOAT,
+			A_DEFFLOAT,
+                        0);
+}
+
+
diff --git a/ikeda.pd b/ikeda.pd
new file mode 100644
index 0000000..d4e3c91
--- /dev/null
+++ b/ikeda.pd
@@ -0,0 +1,26 @@
+#N canvas 48 298 368 335 10;
+#X obj 29 114 metro 50;
+#X obj 29 90 tgl 15 0 empty empty empty 20 8 0 8 -262144 -1 -1 0 1
+;
+#X floatatom 80 89 5 0 0;
+#X msg 114 143 reset;
+#X floatatom 74 285 5 0 0;
+#X text 5 66 Calculate;
+#X text 113 161 Reset To Initial Conditions;
+#X text 114 234 Modify Parameters;
+#X floatatom 29 285 5 0 0;
+#X text 23 264 Output;
+#X text 4 21 Chaos PD Externals - Copyright Ben Bogart 2002;
+#X text 3 37 (This attractor is not continuous);
+#X obj 29 177 ikeda;
+#X msg 116 215 param 0.4 0.9 6 1;
+#X msg 116 193 param 0.4 0.8 20 1;
+#X text 5 6 Ikeda Attractor;
+#X connect 0 0 12 0;
+#X connect 1 0 0 0;
+#X connect 2 0 0 1;
+#X connect 3 0 12 0;
+#X connect 12 0 8 0;
+#X connect 12 1 4 0;
+#X connect 13 0 12 0;
+#X connect 14 0 12 0;
diff --git a/lorenz.c b/lorenz.c
new file mode 100644
index 0000000..ef61f5d
--- /dev/null
+++ b/lorenz.c
@@ -0,0 +1,127 @@
+///////////////////////////////////////////////////////////////////////////////////
+/* Lorenz's Attractor PD External                                                 */
+/* Copyright Ben Bogart 2002                                                     */
+/* This program is distributed under the terms of the GNU General Public License */
+///////////////////////////////////////////////////////////////////////////////////
+
+///////////////////////////////////////////////////////////////////////////////////
+/* This file is part of Chaos PD Externals.                                      */
+/*                                                                               */
+/* Chaos PD Externals are free software; you can redistribute them and/or modify */
+/* them 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.                                           */
+/*                                                                               */
+/* Chaos PD Externals are distributed in the hope that they 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 the Chaos PD Externals; if not, write to the Free Software         */
+/* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA     */
+///////////////////////////////////////////////////////////////////////////////////
+
+#include "m_pd.h"
+#include <math.h>
+
+t_class *myclass;
+
+typedef struct thisismystruct
+{
+	t_object myobj;
+	double h,a,b,c,lx0,ly0,lz0;
+	t_outlet *y_outlet;
+	t_outlet *z_outlet;
+}	mystruct;
+
+static void calculate(mystruct *x)
+{
+	double lx0,ly0,lz0,lx1,ly1,lz1;
+	double h,a,b,c;
+
+	h = x->h;
+	a = x->a;
+	b = x->b;
+	c = x->c;
+	lx0 = x->lx0;
+	ly0 = x->ly0;
+	lz0 = x->lz0;
+
+	lx1 = lx0 + h * a * (ly0 - lx0);
+	ly1 = ly0 + h * (lx0 * (b - lz0) - ly0);
+	lz1 = lz0 + h * (lx0 * ly0 - c * lz0);
+	x->lx0 = lx1;
+	x->ly0 = ly1;
+	x->lz0 = lz1;
+
+	outlet_float(x->myobj.ob_outlet, (t_float)lx1);
+	outlet_float(x->y_outlet, (t_float)ly1);
+	outlet_float(x->z_outlet, (t_float)lz1);
+}
+
+static void reset(mystruct *x)
+{
+	x->lx0 = 0.1;
+        x->ly0 = 0;
+        x->lz0 = 0;
+}	
+
+static void param(mystruct *x, t_floatarg h, t_floatarg a, t_floatarg b, t_floatarg c)
+{
+        x->h = (double)h;
+        x->a = (double)a;
+        x->b = (double)b;
+        x->c = (double)c;
+}
+
+void *lorenz_new(void)
+{
+        mystruct *x = (mystruct *)pd_new(myclass);
+	x->h = 0.01;
+	x->a = 10.0;
+	x->b = 28.0;
+	x->c = 8.0/3.0;
+	x->lx0 = 0.1;
+	x->ly0 = 0;
+	x->lz0 = 0;
+     
+        outlet_new(&x->myobj, &s_float);		/* Default float outlet */
+	x->y_outlet = outlet_new(&x->myobj, &s_float);  /* Two New Outlets */
+	x->z_outlet = outlet_new(&x->myobj, &s_float);
+        return (void *)x;
+}
+
+
+void lorenz_setup(void)
+{
+        post("-------------------------");              /* Copyright info */
+        post("Chaos PD Externals");
+        post("Copyright Ben Bogart 2002");
+        post("-------------------------");
+
+	myclass = class_new(gensym("lorenz"),		/* symname is the symbolic name */
+	(t_newmethod)lorenz_new,			/* Constructor Function */
+	0,						/* Destructor Function */
+	sizeof(mystruct),				/* Size of the structure */
+	CLASS_DEFAULT,					/* Graphical Representation */
+	0);						/* 0 Terminates Argument List */
+
+	class_addbang(myclass, (t_method)calculate);
+	class_addmethod(myclass,
+			(t_method)reset,
+			gensym("reset"),
+			0);
+
+        class_addmethod(myclass,
+                        (t_method)param,
+                        gensym("param"),
+                        A_DEFFLOAT,
+                        A_DEFFLOAT,
+                        A_DEFFLOAT,
+                        A_DEFFLOAT,
+                        0);
+
+}
+
+
diff --git a/lorenz.pd b/lorenz.pd
new file mode 100644
index 0000000..fcbc560
--- /dev/null
+++ b/lorenz.pd
@@ -0,0 +1,25 @@
+#N canvas 288 95 368 335 10;
+#X obj 29 114 metro 50;
+#X obj 29 90 tgl 15 0 empty empty empty 20 8 0 8 -262144 -1 -1 0 1
+;
+#X floatatom 80 89 5 0 0;
+#X obj 29 177 lorenz;
+#X msg 114 143 reset;
+#X floatatom 74 285 5 0 0;
+#X msg 115 194 param 0.02 10 28 2.667;
+#X text 5 6 Lorenz's Attractor;
+#X text 5 66 Calculate;
+#X text 113 161 Reset To Initial Conditions;
+#X text 115 212 Modify Parameters;
+#X floatatom 29 285 5 0 0;
+#X floatatom 120 285 5 0 0;
+#X text 58 258 Output;
+#X text 4 21 Chaos PD Externals - Copyright Ben Bogart 2002;
+#X connect 0 0 3 0;
+#X connect 1 0 0 0;
+#X connect 2 0 0 1;
+#X connect 3 0 11 0;
+#X connect 3 1 5 0;
+#X connect 3 2 12 0;
+#X connect 4 0 3 0;
+#X connect 6 0 3 0;
diff --git a/makefile b/makefile
new file mode 100644
index 0000000..4d3db92
--- /dev/null
+++ b/makefile
@@ -0,0 +1,75 @@
+current:
+	echo make pd_linux, pd_nt, pd_irix5, or pd_irix6
+
+clean: ; rm -f *.pd_linux *.o
+
+# ----------------------- NT -----------------------
+
+pd_nt: lorenz.dll rossler.dll henon.dll ikeda.dll 
+
+.SUFFIXES: .dll
+
+PDNTCFLAGS = /W3 /WX /DNT /DPD /nologo
+VC="C:\Program Files\Microsoft Visual Studio\Vc98"
+
+PDNTINCLUDE = /I. /I\tcl\include /I\ftp\pd\src /I$(VC)\include
+
+PDNTLDIR = $(VC)\lib
+PDNTLIB = $(PDNTLDIR)\libc.lib \
+	$(PDNTLDIR)\oldnames.lib \
+	$(PDNTLDIR)\kernel32.lib \
+	\ftp\pd\bin\pd.lib 
+
+.c.dll:
+	cl $(PDNTCFLAGS) $(PDNTINCLUDE) /c $*.c
+	link /dll /export:$*_setup $*.obj $(PDNTLIB)
+
+# ----------------------- IRIX 5.x -----------------------
+
+pd_irix5: lorenz.pd_irix5 rossler.pd_irix5 henon.pd_irix5 ikeda.pd_irix5
+
+.SUFFIXES: .pd_irix5
+
+SGICFLAGS5 = -o32 -DPD -DUNIX -DIRIX -O2
+
+
+SGIINCLUDE =  -I../../src/
+
+.c.pd_irix5:
+	cc $(SGICFLAGS5) $(SGIINCLUDE) -o $*.o -c $*.c
+	ld -elf -shared -rdata_shared -o $*.pd_irix5 $*.o
+	rm $*.o
+
+# ----------------------- IRIX 6.x -----------------------
+
+pd_irix6: lorenz.pd_irix6 rossler.pd_irix6 henon.pd_irix6 ikeda.pd_irix6
+
+.SUFFIXES: .pd_irix6
+
+SGICFLAGS6 = -n32 -DPD -DUNIX -DIRIX -DN32 -woff 1080,1064,1185 \
+	-OPT:roundoff=3 -OPT:IEEE_arithmetic=3 -OPT:cray_ivdep=true \
+	-Ofast=ip32
+
+.c.pd_irix6:
+	cc $(SGICFLAGS6) $(SGIINCLUDE) -o $*.o -c $*.c
+	ld -IPA -n32 -shared -rdata_shared -o $*.pd_irix6 $*.o
+	rm $*.o
+
+# ----------------------- LINUX i386 -----------------------
+
+pd_linux: lorenz.pd_linux rossler.pd_linux henon.pd_linux ikeda.pd_linux
+
+.SUFFIXES: .pd_linux
+
+LINUXCFLAGS = -DPD -O2 -funroll-loops -fomit-frame-pointer \
+    -Wall -W -Wshadow -Wstrict-prototypes -Werror \
+    -Wno-unused -Wno-parentheses -Wno-switch
+
+LINUXINCLUDE =  -I../../src
+
+.c.pd_linux:
+	cc $(LINUXCFLAGS) $(LINUXINCLUDE) -o $*.o -c $*.c
+	ld -export_dynamic  -shared -o $*.pd_linux $*.o -lc -lm
+	strip --strip-unneeded $*.pd_linux
+	rm $*.o
+
diff --git a/rossler.c b/rossler.c
new file mode 100644
index 0000000..7d81722
--- /dev/null
+++ b/rossler.c
@@ -0,0 +1,126 @@
+///////////////////////////////////////////////////////////////////////////////////
+/* Rossler's Attractor PD External                                               */
+/* Copyright Ben Bogart 2002                                                     */
+/* This program is distributed under the terms of the GNU General Public License */
+///////////////////////////////////////////////////////////////////////////////////
+
+///////////////////////////////////////////////////////////////////////////////////
+/* This file is part of Chaos PD Externals.                                      */
+/*                                                                               */
+/* Chaos PD Externals are free software; you can redistribute them and/or modify */
+/* them 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.                                           */
+/*                                                                               */
+/* Chaos PD Externals are distributed in the hope that they 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 the Chaos PD Externals; if not, write to the Free Software         */
+/* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA     */
+///////////////////////////////////////////////////////////////////////////////////
+
+#include "m_pd.h"
+#include <math.h>
+
+t_class *myclass;
+
+typedef struct thisismystruct
+{
+	t_object myobj;
+	double h,a,b,c,lx0,ly0,lz0;
+	t_outlet *y_outlet;
+	t_outlet *z_outlet;
+}	mystruct;
+
+static void calculate(mystruct *x)
+{
+	double lx0,ly0,lz0,lx1,ly1,lz1;
+	double h,a,b,c;
+
+	h = x->h;
+	a = x->a;
+	b = x->b;
+	c = x->c;
+	lx0 = x->lx0;
+	ly0 = x->ly0;
+	lz0 = x->lz0;
+
+	lx1 = lx0 + h * (-ly0 - lz0);
+	ly1 = ly0 + h * (lx0 + (a * ly0));
+	lz1 = lz0 + h * (b + (lx0*lz0) - (c * lz0));;
+	x->lx0 = lx1;
+	x->ly0 = ly1;
+	x->lz0 = lz1;
+
+	outlet_float(x->myobj.ob_outlet, (t_float)lx1);
+	outlet_float(x->y_outlet, (t_float)ly1);
+	outlet_float(x->z_outlet, (t_float)lz1);
+}
+
+static void reset(mystruct *x)
+{
+	x->lx0 = 0.1;
+        x->ly0 = 0;
+        x->lz0 = 0;
+}
+
+static void param(mystruct *x, t_floatarg h, t_floatarg a, t_floatarg b, t_floatarg c)
+{
+        x->h = (double)h;
+        x->a = (double)a;
+        x->b = (double)b;
+        x->c = (double)c;
+}
+
+void *rossler_new(void)
+{
+        mystruct *x = (mystruct *)pd_new(myclass);
+	x->h = 0.01;
+	x->a = 0.2;
+	x->b = 0.2;
+	x->c = 5.7;
+	x->lx0 = 0.1;
+	x->ly0 = 0;
+	x->lz0 = 0;
+     
+        outlet_new(&x->myobj, &s_float);		/* Default float outlet */
+	x->y_outlet = outlet_new(&x->myobj, &s_float);  /* Two new Outlets */
+	x->z_outlet = outlet_new(&x->myobj, &s_float);
+        return (void *)x;
+}
+
+
+void rossler_setup(void)
+{
+        post("-------------------------");              /* Copyright info */
+        post("Chaos PD Externals");
+        post("Copyright Ben Bogart 2002");
+        post("-------------------------");
+
+	myclass = class_new(gensym("rossler"),		/* symname is the symbolic name */
+	(t_newmethod)rossler_new,			/* Constructor Function */
+	0,						/* Destructor Function */
+	sizeof(mystruct),				/* Size of the structure */
+	CLASS_DEFAULT,					/* Graphical Representation */
+	0);						/* 0 Terminates Argument List */
+
+	class_addbang(myclass, (t_method)calculate);
+	class_addmethod(myclass,
+			(t_method)reset,
+			gensym("reset"),
+			0);
+
+        class_addmethod(myclass,
+                        (t_method)param,
+                        gensym("param"),
+                        A_DEFFLOAT,
+                        A_DEFFLOAT,
+                        A_DEFFLOAT,
+                        A_DEFFLOAT,
+                        0);
+}
+
+
diff --git a/rossler.pd b/rossler.pd
new file mode 100644
index 0000000..fc76b24
--- /dev/null
+++ b/rossler.pd
@@ -0,0 +1,25 @@
+#N canvas 48 298 368 335 10;
+#X obj 29 114 metro 50;
+#X obj 29 90 tgl 15 0 empty empty empty 20 8 0 8 -262144 -1 -1 0 1
+;
+#X floatatom 80 89 5 0 0;
+#X msg 114 143 reset;
+#X floatatom 74 285 5 0 0;
+#X text 5 66 Calculate;
+#X text 113 161 Reset To Initial Conditions;
+#X text 115 212 Modify Parameters;
+#X floatatom 29 285 5 0 0;
+#X floatatom 120 285 5 0 0;
+#X text 58 258 Output;
+#X text 4 21 Chaos PD Externals - Copyright Ben Bogart 2002;
+#X obj 29 177 rossler;
+#X msg 115 193 param 0.01 0.39 0.4 5.8;
+#X text 5 6 Rossler's Attractor;
+#X connect 0 0 12 0;
+#X connect 1 0 0 0;
+#X connect 2 0 0 1;
+#X connect 3 0 12 0;
+#X connect 12 0 8 0;
+#X connect 12 1 4 0;
+#X connect 12 2 9 0;
+#X connect 13 0 12 0;