diff options
Diffstat (limited to 'poisson.c')
| -rw-r--r-- | poisson.c | 182 |
1 files changed, 91 insertions, 91 deletions
@@ -1,91 +1,91 @@ -/* ---------------------------- rand_poisson ---------------------------------- */
-/* */
-/* rand_poisson generates a poisson distributed random variable. */
-/* Written by Olaf Matthes (olaf.matthes@gmx.de) */
-/* Based on code found in Dodge/Jerse "Computer Music" */
-/* 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 <stdlib.h>
-#include <time.h>
-#include <math.h>
-
-#define fran() (t_float)rand()/(t_float)RAND_MAX
-#ifndef M_PI
-#define M_PI 3.1415927
-#endif
-
-static char *version = "poisson v0.1, generates a poisson distributed random variable\n"
- " written by Olaf Matthes <olaf.matthes@gmx.de>";
-
-/* -------------------------- rand_poisson ------------------------------ */
-
-static t_class *rand_poisson_class;
-
-typedef struct _rand_poisson
-{
- t_object x_obj;
- t_float x_lambda;
-} t_rand_poisson;
-
-static void *rand_poisson_new(t_floatarg f)
-{
- t_rand_poisson *x = (t_rand_poisson *)pd_new(rand_poisson_class);
- srand( (unsigned)time( NULL ) );
- floatinlet_new(&x->x_obj, &x->x_lambda);
- outlet_new(&x->x_obj, &s_float);
- x->x_lambda = f;
- return (x);
-}
-
-static void rand_poisson_bang(t_rand_poisson *x)
-{
- t_float u, v;
- t_int n = 0;
- v = exp(-x->x_lambda);
- u = fran();
- while(u > v)
- {
- u *= fran();
- n++;
- }
- outlet_float(x->x_obj.ob_outlet, n);
-}
-
-#ifndef MAXLIB
-void poisson_setup(void)
-{
- rand_poisson_class = class_new(gensym("poisson"), (t_newmethod)rand_poisson_new, 0,
- sizeof(t_rand_poisson), 0, A_DEFFLOAT, 0);
- class_addbang(rand_poisson_class, rand_poisson_bang);
- class_sethelpsymbol(rand_poisson_class, gensym("poisson-help.pd"));
- post(version);
-}
-#else
-void maxlib_poisson_setup(void)
-{
- rand_poisson_class = class_new(gensym("maxlib_poisson"), (t_newmethod)rand_poisson_new, 0,
- sizeof(t_rand_poisson), 0, A_DEFFLOAT, 0);
- class_addcreator((t_newmethod)rand_poisson_new, gensym("poisson"), A_DEFFLOAT, 0);
- class_addbang(rand_poisson_class, rand_poisson_bang);
- class_sethelpsymbol(rand_poisson_class, gensym("maxlib/poisson-help.pd"));
-}
-#endif
+/* ---------------------------- rand_poisson ---------------------------------- */ +/* */ +/* rand_poisson generates a poisson distributed random variable. */ +/* Written by Olaf Matthes (olaf.matthes@gmx.de) */ +/* Based on code found in Dodge/Jerse "Computer Music" */ +/* 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 <stdlib.h> +#include <time.h> +#include <math.h> + +#define fran() (t_float)rand()/(t_float)RAND_MAX +#ifndef M_PI +#define M_PI 3.1415927 +#endif + +static char *version = "poisson v0.1, generates a poisson distributed random variable\n" + " written by Olaf Matthes <olaf.matthes@gmx.de>"; + +/* -------------------------- rand_poisson ------------------------------ */ + +static t_class *rand_poisson_class; + +typedef struct _rand_poisson +{ + t_object x_obj; + t_float x_lambda; +} t_rand_poisson; + +static void *rand_poisson_new(t_floatarg f) +{ + t_rand_poisson *x = (t_rand_poisson *)pd_new(rand_poisson_class); + srand( (unsigned)time( NULL ) ); + floatinlet_new(&x->x_obj, &x->x_lambda); + outlet_new(&x->x_obj, &s_float); + x->x_lambda = f; + return (x); +} + +static void rand_poisson_bang(t_rand_poisson *x) +{ + t_float u, v; + t_int n = 0; + v = exp(-x->x_lambda); + u = fran(); + while(u > v) + { + u *= fran(); + n++; + } + outlet_float(x->x_obj.ob_outlet, n); +} + +#ifndef MAXLIB +void poisson_setup(void) +{ + rand_poisson_class = class_new(gensym("poisson"), (t_newmethod)rand_poisson_new, 0, + sizeof(t_rand_poisson), 0, A_DEFFLOAT, 0); + class_addbang(rand_poisson_class, rand_poisson_bang); + class_sethelpsymbol(rand_poisson_class, gensym("poisson-help.pd")); + logpost(NULL, 4, version); +} +#else +void maxlib_poisson_setup(void) +{ + rand_poisson_class = class_new(gensym("maxlib_poisson"), (t_newmethod)rand_poisson_new, 0, + sizeof(t_rand_poisson), 0, A_DEFFLOAT, 0); + class_addcreator((t_newmethod)rand_poisson_new, gensym("poisson"), A_DEFFLOAT, 0); + class_addbang(rand_poisson_class, rand_poisson_bang); + class_sethelpsymbol(rand_poisson_class, gensym("maxlib/poisson-help.pd")); +} +#endif |