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/* ------------------------- rewrap ------------------------------------------ */
/* */
/* rewraps input to lie within an output range. */
/* Written by Olaf Matthes <olaf.matthes@gmx.de> */
/* Get source at http://www.akustische-kunst.org/puredata/maxlib/ */
/* */
/* 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; if not, write to the Free Software */
/* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
/* */
/* Based on PureData by Miller Puckette and others. */
/* */
/* ---------------------------------------------------------------------------- */
#include "m_pd.h"
#include <stdio.h>
#include <math.h>
static char *version = "rewrap v0.1, written by Olaf Matthes <olaf.matthes@gmx.de>";
typedef struct rewrap
{
t_object x_ob;
t_float x_min; /* low border of input range */
t_float x_max; /* high border of input range */
t_outlet *x_outlet1; /* path-through outlet */
t_outlet *x_outlet2; /* rewrap outlet */
} t_rewrap;
static void rewrap_float(t_rewrap *x, t_floatarg f)
{
t_float min = x->x_min;
t_float max = x->x_max;
t_float range = 2.0f * (max - min);
t_int i;
if(range == 0.0f)
{
f = min;
outlet_float(x->x_outlet2, 0);
}
else if(f < min)
{
float diff = min - f;
float n = ceil(diff / range);
f += n * range;
if(f >= max)
{
f = 2 * max - f;
n -= 0.5;
}
outlet_float(x->x_outlet2, (t_int)(-2.0f * n));
}
else if (f >= max)
{
float diff = f - max;
float n = floor(diff / range) + 1.0f;
f -= n * range;
if(f < min)
{
f = 2 * min - f;
n -= 0.5;
}
outlet_float(x->x_outlet2, (t_int)(2.0f * n));
}
else
outlet_float(x->x_outlet2, 0.0f);
outlet_float(x->x_outlet1, f);
}
static void rewrap_a(t_rewrap *x, t_floatarg a)
{
t_float max = x->x_max;
if(a <= max)
x->x_min = a;
else
{
x->x_min = max;
x->x_max = a;
}
}
static void rewrap_b(t_rewrap *x, t_floatarg b)
{
t_float min = x->x_min;
if(b >= min)
x->x_max = b;
else
{
x->x_max = min;
x->x_min = b;
}
}
static t_class *rewrap_class;
static void *rewrap_new(t_floatarg fmin, t_floatarg fmax)
{
t_rewrap *x = (t_rewrap *)pd_new(rewrap_class);
inlet_new(&x->x_ob, &x->x_ob.ob_pd, gensym("float"), gensym("a"));
inlet_new(&x->x_ob, &x->x_ob.ob_pd, gensym("float"), gensym("b"));
x->x_outlet1 = outlet_new(&x->x_ob, gensym("float"));
x->x_outlet2 = outlet_new(&x->x_ob, gensym("float"));
x->x_min = fmin;
rewrap_b(x, fmax);
return (void *)x;
}
#ifndef MAXLIB
void rewrap_setup(void)
{
rewrap_class = class_new(gensym("rewrap"), (t_newmethod)rewrap_new,
0, sizeof(t_rewrap), 0, A_DEFFLOAT, A_DEFFLOAT, 0);
class_addfloat(rewrap_class, rewrap_float);
class_addmethod(rewrap_class, (t_method)rewrap_a, gensym("a"), A_FLOAT, 0);
class_addmethod(rewrap_class, (t_method)rewrap_b, gensym("b"), A_FLOAT, 0);
logpost(NULL, 4, version);
}
#else
void maxlib_rewrap_setup(void)
{
rewrap_class = class_new(gensym("maxlib_rewrap"), (t_newmethod)rewrap_new,
0, sizeof(t_rewrap), 0, A_DEFFLOAT, A_DEFFLOAT, 0);
class_addcreator((t_newmethod)rewrap_new, gensym("rewrap"), A_DEFFLOAT, A_DEFFLOAT, 0);
class_addfloat(rewrap_class, rewrap_float);
class_addmethod(rewrap_class, (t_method)rewrap_a, gensym("a"), A_FLOAT, 0);
class_addmethod(rewrap_class, (t_method)rewrap_b, gensym("b"), A_FLOAT, 0);
class_sethelpsymbol(rewrap_class, gensym("maxlib/rewrap-help.pd"));
}
#endif
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