From 10b474fba485e9a93157c7fa534bb66e7bcc6fde Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?IOhannes=20m=20zm=C3=B6lnig?=
 <zmoelnig@users.sourceforge.net>
Date: Mon, 21 Mar 2005 14:33:31 +0000
Subject: This commit was generated by cvs2svn to compensate for changes in
 r2637, which included commits to RCS files with non-trunk default branches.

svn path=/trunk/externals/iem/iemmatrix/; revision=2638
---
 src/mtx_rand.c | 93 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 93 insertions(+)
 create mode 100644 src/mtx_rand.c

(limited to 'src/mtx_rand.c')

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 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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