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/*
* iemmatrix
*
* objects for manipulating simple matrices
* mostly refering to matlab/octave matrix functions
*
* (c) IOhannes m zmölnig, forum::für::umläute
*
* IEM, Graz
*
* this code is published under the LGPL
*
*/
#include "iemmatrix.h"
/* mtx_rand */
static t_class *mtx_rand_class;
static void mtx_rand_seed(t_matrix *x, t_float f)
{
x->current_row=f;
}
static int makeseed(void)
{
static unsigned int random_nextseed = 1489853723;
random_nextseed = random_nextseed * 435898247 + 938284287;
return (random_nextseed & 0x7fffffff);
}
static void mtx_rand_random(t_matrix *x)
{
long size = x->row * x->col;
t_atom *ap=x->atombuffer+2;
int val = x->current_row;
while(size--)SETFLOAT(ap+size, ((float)(((val=val*435898247+382842987)&0x7fffffff)-0x40000000))*(float)(0.5/0x40000000)+0.5);
x->current_row=val;
}
static void mtx_rand_list(t_matrix *x, t_symbol *s, int argc, t_atom *argv)
{
int row = atom_getfloat(argv++);
int col = atom_getfloat(argv++);
if(!argv)return;
if(argc==1)col=row;
adjustsize(x, row, col);
mtx_rand_random(x);
matrix_bang(x);
}
static void mtx_rand_matrix(t_matrix *x, t_symbol *s, int argc, t_atom *argv)
{
matrix_matrix2(x, s, argc, argv);
mtx_rand_random(x);
matrix_bang(x);
}
static void mtx_rand_bang(t_matrix *x)
{
mtx_rand_random(x);
matrix_bang(x);
}
static void *mtx_rand_new(t_symbol *s, int argc, t_atom *argv)
{
t_matrix *x = (t_matrix *)pd_new(mtx_rand_class);
int row, col;
outlet_new(&x->x_obj, 0);
x->col=x->row=0;
x->atombuffer=0;
x->current_row=makeseed();
if (argc) {
row=atom_getfloat(argv);
col=(argc>1)?atom_getfloat(argv+1):row;
adjustsize(x, row, col);
mtx_rand_random(x);
}
return (x);
}
void mtx_rand_setup(void)
{
mtx_rand_class = class_new(gensym("mtx_rand"), (t_newmethod)mtx_rand_new,
(t_method)matrix_free, sizeof(t_matrix), 0, A_GIMME, 0);
class_addmethod(mtx_rand_class, (t_method)mtx_rand_matrix, gensym("matrix"), A_GIMME, 0);
class_addlist (mtx_rand_class, mtx_rand_list);
class_addbang (mtx_rand_class, mtx_rand_bang);
class_addmethod(mtx_rand_class, (t_method)mtx_rand_seed, gensym("seed"), A_FLOAT, 0);
class_sethelpsymbol(mtx_rand_class, gensym("iemmatrix/mtx_rand"));
}
void iemmtx_rand_setup(void){
mtx_rand_setup();
}
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