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/* ------------------------- minus ------------------------------------------ */
/* */
/* Like '-', but calculates output whenever _any_ of the inlets changes. */
/* 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>
#define MAXSIZE 32
static char *version = "minus v0.2, written by Olaf Matthes <olaf.matthes@gmx.de>";
typedef struct minus
{
t_object x_ob;
t_inlet *x_inleft; /* leftmost inlet */
t_inlet *x_inright; /* right inlet */
t_outlet *x_outlet; /* result */
t_int x_numvalues; /* number of values / inlets */
t_float x_minusvalue[MAXSIZE];
} t_minus;
static void minus_bang(t_minus *x)
{
int i;
t_float result = x->x_minusvalue[0];
for(i = 1; i < x->x_numvalues; i++)
result -= x->x_minusvalue[i];
outlet_float(x->x_outlet, result);
}
static void minus_float(t_minus *x, t_floatarg f)
{
x->x_minusvalue[0] = f;
minus_bang(x); /* calculate result */
}
static void minus_ft1(t_minus *x, t_floatarg f)
{
x->x_minusvalue[1] = f;
minus_bang(x); /* calculate result */
}
static t_class *minus_class;
static void *minus_new(t_symbol *s, t_int argc, t_atom* argv)
{
int i;
t_minus *x = (t_minus *)pd_new(minus_class);
x->x_inright = inlet_new(&x->x_ob, &x->x_ob.ob_pd, gensym("float"), gensym("ft1"));
for(i = 2; i < argc; i++) /* create additional inlets, if any */
{
// inlet_new(&x->x_ob, &x->x_ob.ob_pd, gensym("float"), gensym("ft1"));
floatinlet_new(&x->x_ob, &x->x_minusvalue[i]);
}
x->x_outlet = outlet_new(&x->x_ob, gensym("float"));
for(i = 0; i < argc; i++)
{
x->x_minusvalue[i] = atom_getfloatarg(i, argc, argv);
}
x->x_numvalues = i;
#ifndef MAXLIB
post(version);
#endif
return (void *)x;
}
void minus_setup(void)
{
minus_class = class_new(gensym("minus"), (t_newmethod)minus_new,
0, sizeof(t_minus), 0, A_GIMME, 0);
class_addfloat(minus_class, minus_float);
class_addmethod(minus_class, (t_method)minus_ft1, gensym("ft1"), A_FLOAT, 0);
class_addbang(minus_class, (t_method)minus_bang);
class_sethelpsymbol(minus_class, gensym("maxlib/help-minus.pd"));
}
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