From 60e9383a42cd47cc5d570e66a8f601bd97d94732 Mon Sep 17 00:00:00 2001
From: Lukas Werling <lukas.werling@gmail.com>
Date: Sun, 1 May 2016 19:21:09 +0200
Subject: [PATCH] Improve seeding of UnsyncedRandomRng

---
 src/lib/C4Random.cpp | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/src/lib/C4Random.cpp b/src/lib/C4Random.cpp
index 78fef9d2b..f04edef29 100644
--- a/src/lib/C4Random.cpp
+++ b/src/lib/C4Random.cpp
@@ -21,14 +21,21 @@
 #include "lib/C4Random.h"
 #include "control/C4Record.h"
 
+#include <random>
 #include <pcg/pcg_random.hpp>
 
 int RandomCount = 0;
-static pcg32 RandomRng, UnsyncedRandomRng;
+
+static pcg32 SeededRng()
+{
+	pcg_extras::seed_seq_from<std::random_device> seed_source;
+	return pcg32(seed_source);
+}
+
+static pcg32 RandomRng, UnsyncedRandomRng = SeededRng();
 
 void FixedRandom(uint64_t seed)
 {
-	UnsyncedRandomRng.seed(seed);
 	RandomRng.seed(seed);
 	RandomCount = 0;
 }