Merge commit '7621e2f8dec938cf48181c8b10afc9b01f444e68' into beta

submodules/RMIntro/Sources/core/rngs.c

@@ -0,0 +1,19 @@
+#include <stdio.h>
+#include <time.h>
+#include <stdlib.h>
+#include "rngs.h"
+
+float frand(float from, float to)
+{
+    return (float)(((double)random()/RAND_MAX)*(to-from)+from);
+}
+
+int irand(int from, int to)
+{
+    return (int)(((double)random()/RAND_MAX)*(to-from+1)+from);
+}
+
+int signrand()
+{
+    return irand(0, 1)*2-1;
+}