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+/* -------------------------- multi ------------------------------------------ */
+/* */
+/* 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 = "multi v0.2, written by Olaf Matthes <olaf.matthes@gmx.de>";
+
+typedef struct multi
+{
+ 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_multivalue[MAXSIZE];
+
+} t_multi;
+
+static void multi_bang(t_multi *x)
+{
+ int i;
+ t_float result = x->x_multivalue[0];
+ for(i = 1; i < x->x_numvalues; i++)
+ result *= x->x_multivalue[i];
+ outlet_float(x->x_outlet, result);
+}
+
+static void multi_float(t_multi *x, t_floatarg f)
+{
+ x->x_multivalue[0] = f;
+ multi_bang(x); /* calculate result */
+}
+
+static void multi_ft1(t_multi *x, t_floatarg f)
+{
+ x->x_multivalue[1] = f;
+ multi_bang(x); /* calculate result */
+}
+
+static t_class *multi_class;
+
+static void *multi_new(t_symbol *s, t_int argc, t_atom* argv)
+{
+ int i;
+
+ t_multi *x = (t_multi *)pd_new(multi_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 */
+ {
+ floatinlet_new(&x->x_ob, &x->x_multivalue[i]);
+ }
+ x->x_outlet = outlet_new(&x->x_ob, gensym("float"));
+
+ for(i = 0; i < argc; i++)
+ {
+ x->x_multivalue[i] = atom_getfloatarg(i, argc, argv);;
+ }
+ x->x_numvalues = i;
+#ifndef MAXLIB
+ post(version);
+#endif
+ return (void *)x;
+}
+
+void multi_setup(void)
+{
+ multi_class = class_new(gensym("multi"), (t_newmethod)multi_new,
+ 0, sizeof(t_multi), 0, A_GIMME, 0);
+ class_addfloat(multi_class, multi_float);
+ class_addmethod(multi_class, (t_method)multi_ft1, gensym("ft1"), A_FLOAT, 0);
+ class_addbang(multi_class, (t_method)multi_bang);
+ class_sethelpsymbol(multi_class, gensym("maxlib/help-multi.pd"));
+}
+