Added Mersenne Twister random number generator.

1 files changed, 31 insertions, 0 deletions

diff --git a/src/stable/randommersenne.h b/src/stable/randommersenne.h
new file mode 100644
index 0000000..27c100e
--- /dev/null
+++ b/src/stable/randommersenne.h
@@ -0,0 +1,31 @@
+#ifndef BU_RANDOM_MERSENNE_H
+#define BU_RANDOM_MERSENNE_H
+
+#include "bu/randombase.h"
+
+namespace Bu
+{
+    /**
+     * An implementation of Mersenne Twister (MT19937) algorithm.  This as an
+     * algorithm with an excellent reputation for very good random number
+     * generation and a very large period.  It is however, relatively slow and
+     * complex compared to, say the Complementary Multiply With Carry
+     * (Bu::RandomCmwc), and may not actually be a *better* random number
+     * generator.
+     */
+    class RandomMersenne : public Bu::RandomBase
+    {
+    public:
+        RandomMersenne( int32_t iSeed=0 );
+        virtual ~RandomMersenne();
+
+        virtual void seed( int32_t iSeed );
+        virtual int32_t rand();
+
+    private:
+        int32_t iIndex;
+        uint32_t iMt[624];
+    };
+};
+
+#endif