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authorIOhannes m zmölnig <zmoelnig@users.sourceforge.net>2005-03-21 14:33:31 +0000
committerIOhannes m zmölnig <zmoelnig@users.sourceforge.net>2005-03-21 14:33:31 +0000
commit10b474fba485e9a93157c7fa534bb66e7bcc6fde (patch)
tree73e9e02738ea62179a1722b37ef49a9e91cfcbad /src/mtx_rand.c
This commit was generated by cvs2svn to compensate for changes in r2637,svn2git-root
which included commits to RCS files with non-trunk default branches. svn path=/trunk/externals/iem/iemmatrix/; revision=2638
Diffstat (limited to 'src/mtx_rand.c')
-rw-r--r--src/mtx_rand.c93
1 files changed, 93 insertions, 0 deletions
diff --git a/src/mtx_rand.c b/src/mtx_rand.c
new file mode 100644
index 0000000..dee481a
--- /dev/null
+++ b/src/mtx_rand.c
@@ -0,0 +1,93 @@
+/*
+ * iemmatrix
+ *
+ * objects for manipulating simple matrices
+ * mostly refering to matlab/octave matrix functions
+ *
+ * (c) IOhannes m zmlnig, forum::fr::umlute
+ *
+ * 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();
+}
+