diff options
author | Hans-Christoph Steiner <eighthave@users.sourceforge.net> | 2013-01-17 22:54:00 +0000 |
---|---|---|
committer | IOhannes m zmölnig <zmoelnig@iem.at> | 2015-10-14 13:53:22 +0200 |
commit | 71b83fc040b848c98c5065d95ecbc72b0b4f8943 (patch) | |
tree | b64020d616887a488f8304fc13f57ff4d6c4e313 /arbran.c | |
parent | 2b487890477a2ad969a1694270cee19b1265f3f6 (diff) |
merging maxlib v1.5.5 from branches/pd-extended/0.43HEADsvn2git-headmaster
svn path=/trunk/externals/maxlib/; revision=16897
Diffstat (limited to 'arbran.c')
-rw-r--r-- | arbran.c | 378 |
1 files changed, 189 insertions, 189 deletions
@@ -1,189 +1,189 @@ -/* ---------------------------- rand_arbran ----------------------------------- */
-/* */
-/* rand_arbran generates a random variable that conforms to the */
-/* piecewise probability density in two arrays */
-/* 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 = "arbran v0.1b, generates a random variable that conforms to the\n"
- " piecewise probability density in two arrays\n"
- " written by Olaf Matthes <olaf.matthes@gmx.de>";
-
-/* -------------------------- rand_arbran ------------------------------ */
-
-static t_class *rand_arbran_class;
-
-typedef struct _rand_arbran
-{
- t_object x_obj;
- t_symbol *x_x;
- t_symbol *x_p;
- t_garray *x_bufx;
- t_garray *x_bufp;
-} t_rand_arbran;
-
-static void rand_arbran_pdfscale(t_rand_arbran *x)
-{
- t_garray *bx = x->x_bufx, *bp = x->x_bufp;
- t_float a = 0;
- t_int k = 0;
- t_float *tx, *tp;
- int ix, ip;
- if (!garray_getfloatarray(bx, &ix, &tx))
- {
- post("arbran: couldn't read from array!");
- return;
- }
- if (!garray_getfloatarray(bp, &ip, &tp))
- {
- post("arbran: couldn't read from array!");
- return;
- }
-
- for(k = 1; k < ix; k++)
- {
- a += (tx[k]-tx[k-1])*(tp[k]+tp[k-1])/2.0;
- }
- for(k = 0; k < ix; k++)
- {
- tp[k] = tp[k]/a;
- }
- garray_redraw(x->x_bufp);
-}
-
-static void rand_arbran_bang(t_rand_arbran *x)
-{
- t_garray *bx = x->x_bufx, *bp = x->x_bufp;
- t_float a, u, a0, slope, b, d, r;
- t_int k = 0;
- t_float *tx, *tp;
- int ix, ip;
- if (!garray_getfloatarray(bx, &ix, &tx))
- {
- post("arbran: couldn't read from array!");
- return;
- }
- if (!garray_getfloatarray(bp, &ip, &tp))
- {
- post("arbran: couldn't read from array!");
- return;
- }
-
- a = 0;
- a0 = 0;
- u = fran();
- while(u > a)
- {
- a0 = (tx[k+1]-tx[k])*(tp[k+1]+tp[k])/2.0;
- a += a0;
- k++;
- }
- k--;
- slope = (tp[k+1]-tp[k])/(tx[k+1]-tx[k]);
- if(slope == 0)
- {
- r = (u-a+a0)/tp[k]+tx[k];
- }
- else
- {
- b=tp[k]/slope-tx[k];
- d=b*b+tx[k]*tx[k]+2*b*tx[k]+2*(u-a+a0)/slope;
- if(slope > 0)
- r=-b+sqrt(d);
- else
- r=-b-sqrt(d);
- }
- outlet_float(x->x_obj.ob_outlet, r);
-}
-
-static void rand_arbran_set(t_rand_arbran *x)
-{
- t_garray *b, *b2;
-
- if ((b = (t_garray *)pd_findbyclass(x->x_x, garray_class)))
- {
- post("arbran: array set to \"%s\"", x->x_x->s_name);
- x->x_bufx = b;
- } else {
- post("arbran: no array \"%s\" (error %d)", x->x_x->s_name, b);
- x->x_bufx = 0;
- }
- if ((b2 = (t_garray *)pd_findbyclass(x->x_p, garray_class)))
- {
- post("arbran: array set to \"%s\"", x->x_p->s_name);
- x->x_bufp = b2;
- } else {
- post("arbran: no array \"%s\" (error %d)", x->x_p->s_name, b);
- x->x_bufp = 0;
- }
-}
-
-static void rand_arbran_setarrays(t_rand_arbran *x, t_symbol *s1, t_symbol *s2)
-{
- x->x_x = s1;
- x->x_p = s2;
- rand_arbran_set(x);
-}
-
-static void *rand_arbran_new(t_symbol *s1, t_symbol *s2)
-{
- t_rand_arbran *x = (t_rand_arbran *)pd_new(rand_arbran_class);
- srand( (unsigned)time( NULL ) );
- outlet_new(&x->x_obj, &s_float);
- x->x_x = s1;
- x->x_p = s2;
- rand_arbran_set(x);
- return (x);
-}
-
-#ifndef MAXLIB
-void arbran_setup(void)
-{
- rand_arbran_class = class_new(gensym("arbran"), (t_newmethod)rand_arbran_new, 0,
- sizeof(t_rand_arbran), 0, A_SYMBOL, A_SYMBOL, 0);
-#else
-void maxlib_arbran_setup(void)
-{
- rand_arbran_class = class_new(gensym("maxlib_arbran"), (t_newmethod)rand_arbran_new, 0,
- sizeof(t_rand_arbran), 0, A_SYMBOL, A_SYMBOL, 0);
-#endif
- class_addbang(rand_arbran_class, rand_arbran_bang);
- class_addmethod(rand_arbran_class, (t_method)rand_arbran_pdfscale, gensym("pdfscale"), 0);
- class_addmethod(rand_arbran_class, (t_method)rand_arbran_setarrays, gensym("set"), A_SYMBOL, A_SYMBOL, 0);
-#ifndef MAXLIB
- class_sethelpsymbol(rand_arbran_class, gensym("arbran-help.pd"));
- post(version);
-#else
- class_addcreator((t_newmethod)rand_arbran_new, gensym("arbran"), A_SYMBOL, A_SYMBOL, 0);
- class_sethelpsymbol(rand_arbran_class, gensym("maxlib/arbran-help.pd"));
-#endif
-}
+/* ---------------------------- rand_arbran ----------------------------------- */ +/* */ +/* rand_arbran generates a random variable that conforms to the */ +/* piecewise probability density in two arrays */ +/* 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 = "arbran v0.1b, generates a random variable that conforms to the\n" + " piecewise probability density in two arrays\n" + " written by Olaf Matthes <olaf.matthes@gmx.de>"; + +/* -------------------------- rand_arbran ------------------------------ */ + +static t_class *rand_arbran_class; + +typedef struct _rand_arbran +{ + t_object x_obj; + t_symbol *x_x; + t_symbol *x_p; + t_garray *x_bufx; + t_garray *x_bufp; +} t_rand_arbran; + +static void rand_arbran_pdfscale(t_rand_arbran *x) +{ + t_garray *bx = x->x_bufx, *bp = x->x_bufp; + t_float a = 0; + t_int k = 0; + t_float *tx, *tp; + int ix, ip; + if (!garray_getfloatarray(bx, &ix, &tx)) + { + post("arbran: couldn't read from array!"); + return; + } + if (!garray_getfloatarray(bp, &ip, &tp)) + { + post("arbran: couldn't read from array!"); + return; + } + + for(k = 1; k < ix; k++) + { + a += (tx[k]-tx[k-1])*(tp[k]+tp[k-1])/2.0; + } + for(k = 0; k < ix; k++) + { + tp[k] = tp[k]/a; + } + garray_redraw(x->x_bufp); +} + +static void rand_arbran_bang(t_rand_arbran *x) +{ + t_garray *bx = x->x_bufx, *bp = x->x_bufp; + t_float a, u, a0, slope, b, d, r; + t_int k = 0; + t_float *tx, *tp; + int ix, ip; + if (!garray_getfloatarray(bx, &ix, &tx)) + { + post("arbran: couldn't read from array!"); + return; + } + if (!garray_getfloatarray(bp, &ip, &tp)) + { + post("arbran: couldn't read from array!"); + return; + } + + a = 0; + a0 = 0; + u = fran(); + while(u > a) + { + a0 = (tx[k+1]-tx[k])*(tp[k+1]+tp[k])/2.0; + a += a0; + k++; + } + k--; + slope = (tp[k+1]-tp[k])/(tx[k+1]-tx[k]); + if(slope == 0) + { + r = (u-a+a0)/tp[k]+tx[k]; + } + else + { + b=tp[k]/slope-tx[k]; + d=b*b+tx[k]*tx[k]+2*b*tx[k]+2*(u-a+a0)/slope; + if(slope > 0) + r=-b+sqrt(d); + else + r=-b-sqrt(d); + } + outlet_float(x->x_obj.ob_outlet, r); +} + +static void rand_arbran_set(t_rand_arbran *x) +{ + t_garray *b, *b2; + + if ((b = (t_garray *)pd_findbyclass(x->x_x, garray_class))) + { + post("arbran: array set to \"%s\"", x->x_x->s_name); + x->x_bufx = b; + } else { + post("arbran: no array \"%s\" (error %d)", x->x_x->s_name, b); + x->x_bufx = 0; + } + if ((b2 = (t_garray *)pd_findbyclass(x->x_p, garray_class))) + { + post("arbran: array set to \"%s\"", x->x_p->s_name); + x->x_bufp = b2; + } else { + post("arbran: no array \"%s\" (error %d)", x->x_p->s_name, b); + x->x_bufp = 0; + } +} + +static void rand_arbran_setarrays(t_rand_arbran *x, t_symbol *s1, t_symbol *s2) +{ + x->x_x = s1; + x->x_p = s2; + rand_arbran_set(x); +} + +static void *rand_arbran_new(t_symbol *s1, t_symbol *s2) +{ + t_rand_arbran *x = (t_rand_arbran *)pd_new(rand_arbran_class); + srand( (unsigned)time( NULL ) ); + outlet_new(&x->x_obj, &s_float); + x->x_x = s1; + x->x_p = s2; + rand_arbran_set(x); + return (x); +} + +#ifndef MAXLIB +void arbran_setup(void) +{ + rand_arbran_class = class_new(gensym("arbran"), (t_newmethod)rand_arbran_new, 0, + sizeof(t_rand_arbran), 0, A_SYMBOL, A_SYMBOL, 0); +#else +void maxlib_arbran_setup(void) +{ + rand_arbran_class = class_new(gensym("maxlib_arbran"), (t_newmethod)rand_arbran_new, 0, + sizeof(t_rand_arbran), 0, A_SYMBOL, A_SYMBOL, 0); +#endif + class_addbang(rand_arbran_class, rand_arbran_bang); + class_addmethod(rand_arbran_class, (t_method)rand_arbran_pdfscale, gensym("pdfscale"), 0); + class_addmethod(rand_arbran_class, (t_method)rand_arbran_setarrays, gensym("set"), A_SYMBOL, A_SYMBOL, 0); +#ifndef MAXLIB + class_sethelpsymbol(rand_arbran_class, gensym("arbran-help.pd")); + logpost(NULL, 4, version); +#else + class_addcreator((t_newmethod)rand_arbran_new, gensym("arbran"), A_SYMBOL, A_SYMBOL, 0); + class_sethelpsymbol(rand_arbran_class, gensym("maxlib/arbran-help.pd")); +#endif +} |