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///////////////////////////////////////////////////////////////////////////////////
/* 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 *ikeda_class;
typedef struct ikeda_struct
{
t_object ikeda_obj;
double a, b, c, rho, lx0, ly0;
t_outlet *y_outlet;
} ikeda_struct;
static void calculate(ikeda_struct *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->ikeda_obj.ob_outlet, (t_float)lx1);
outlet_float(x->y_outlet, (t_float)ly1);
}
static void reset(ikeda_struct *x, t_floatarg lx0, t_floatarg ly0)
{
x->lx0 = lx0;
x->ly0 = ly0;
}
static void param(ikeda_struct *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)
{
ikeda_struct *x = (ikeda_struct *)pd_new(ikeda_class);
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->ikeda_obj, &s_float); /* Default float outlet */
x->y_outlet = outlet_new(&x->ikeda_obj, &s_float); /* New Outlet */
return (void *)x;
}
void ikeda_setup(void)
{
post("ikeda");
ikeda_class = class_new(gensym("ikeda"), /* symname is the symbolic name */
(t_newmethod)ikeda_new, /* Constructor Function */
0, /* Destructor Function */
sizeof(ikeda_struct), /* Size of the structure */
CLASS_DEFAULT, /* Graphical Representation */
0); /* 0 Terminates Argument List */
class_addbang(ikeda_class, (t_method)calculate);
class_addmethod(ikeda_class,
(t_method)reset,
gensym("reset"),
A_DEFFLOAT,
A_DEFFLOAT,
0);
class_addmethod(ikeda_class,
(t_method)param,
gensym("param"),
A_DEFFLOAT,
A_DEFFLOAT,
A_DEFFLOAT,
A_DEFFLOAT,
0);
}
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