From: Mikko Rasa <tdb@tdb.fi>
Date: Fri, 6 Jan 2017 16:16:48 +0000 (+0200)
Subject: Perform ambient occlusion PRNG multiplication with 64-bit integers
X-Git-Url: http://git.tdb.fi/?a=commitdiff_plain;h=b3caa9f93c865a54a5d338af1ef474ad383f8099;p=libs%2Fgl.git

Perform ambient occlusion PRNG multiplication with 64-bit integers
---

diff --git a/source/ambientocclusion.cpp b/source/ambientocclusion.cpp
index 5edbf833..3d56f3f0 100644
--- a/source/ambientocclusion.cpp
+++ b/source/ambientocclusion.cpp
@@ -52,7 +52,7 @@ AmbientOcclusion::AmbientOcclusion(unsigned w, unsigned h, float):
 float AmbientOcclusion::random(unsigned &seed)
 {
 	static const unsigned modulus = (1U<<31)-1;
-	seed = (seed*48271)%modulus;  // minstd
+	seed = (static_cast<UInt64>(seed)*48271)%modulus;  // minstd
 	return static_cast<float>(seed)/(modulus-1);
 }