Merge branch 'master' into shortcuts

1 files changed, 48 insertions, 0 deletions

diff --git a/src/libcola/pseudorandom.cpp b/src/libcola/pseudorandom.cpp
new file mode 100644
index 000000000..6577b3a05
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+++ b/src/libcola/pseudorandom.cpp
@@ -0,0 +1,48 @@
+/*
+ * vim: ts=4 sw=4 et tw=0 wm=0
+ *
+ * libcola - A library providing force-directed network layout using the 
+ *           stress-majorization method subject to separation constraints.
+ *
+ * Copyright (C) 2015  Monash University
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ * See the file LICENSE.LGPL distributed with the library.
+ *
+ * This library 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.
+ *
+ * Author(s):  Tim Dwyer
+*/
+
+#include "libcola/pseudorandom.h"
+
+namespace cola {
+
+PseudoRandom::PseudoRandom(double s)
+    : a(214013),
+      c(2531011),
+      m(2147483648),
+      range(32767),
+      seed(s)
+{
+}
+
+double PseudoRandom::getNext(void)
+{
+    seed = (seed * a + c) % m;
+    return (seed >> 16) / range;
+}
+
+double PseudoRandom::getNextBetween(double min, double max)
+{
+    return min + getNext() * (max - min);
+}
+
+     
+}
+