From 3bd810fedc3aea68628377a678426d0f4a5a849b Mon Sep 17 00:00:00 2001
From: ehofman <ehofman>
Date: Sat, 30 Apr 2005 10:00:16 +0000
Subject: [PATCH] Make use of the repeatable sg_random() function so display
 systems can synchronize 3d clouds too.

---
 simgear/scene/sky/cloudfield.cxx | 4 +++-
 simgear/scene/sky/newcloud.cxx   | 3 ++-
 2 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/simgear/scene/sky/cloudfield.cxx b/simgear/scene/sky/cloudfield.cxx
index bdd64aa3..af0abc33 100644
--- a/simgear/scene/sky/cloudfield.cxx
+++ b/simgear/scene/sky/cloudfield.cxx
@@ -28,6 +28,7 @@
 
 #include <plib/sg.h>
 #include <plib/ssg.h>
+#include <simgear/math/sg_random.h>
 #include <simgear/math/sg_geodesy.hxx>
 #include <simgear/math/polar3d.hxx>
 
@@ -193,6 +194,7 @@ SGCloudField::SGCloudField() :
 	sgSetVec3( relative_position, 0,0,0);
 	theField.reserve(200);
 	inViewClouds.reserve(200);
+        sg_srandom_time_10();
 }
 
 SGCloudField::~SGCloudField() {
@@ -247,7 +249,7 @@ void SGCloudField::addCloud( sgVec3 pos, SGNewCloud *cloud) {
 
 
 static float Rnd(float n) {
-	return n * (-0.5f + rand() / (float) RAND_MAX);
+	return n * (-0.5f + sg_random());
 }
 
 // for debug only
diff --git a/simgear/scene/sky/newcloud.cxx b/simgear/scene/sky/newcloud.cxx
index 917d8065..3053606a 100644
--- a/simgear/scene/sky/newcloud.cxx
+++ b/simgear/scene/sky/newcloud.cxx
@@ -28,6 +28,7 @@
 
 #include <plib/sg.h>
 #include <plib/ssg.h>
+#include <simgear/math/sg_random.h>
 #include <simgear/misc/sg_path.hxx>
 
 #include STL_ALGORITHM
@@ -240,7 +241,7 @@ void SGNewCloud::addSprite(float x, float y, float z, float r, CLbox_type type,
 
 // return a random number between -n/2 and n/2
 static float Rnd(float n) {
-	return n * (-0.5f + rand() / (float) RAND_MAX);
+	return n * (-0.5f + sg_random());
 }
 
 // generate all sprite with defined boxes
-- 
2.39.5