From ed88ce2b8cbe4beefc930eca3f773997d649e23c Mon Sep 17 00:00:00 2001
From: havoc <havoc@d7cf8633-e32d-0410-b094-e92efae38249>
Date: Thu, 25 Nov 2004 16:19:56 +0000
Subject: [PATCH] changed lhrandom to use the full RAND_MAX limit (more random,
 after all the low bits are the most predictable), and made the random() qc
 builtin use lhrandom

git-svn-id: svn://svn.icculus.org/twilight/trunk/darkplaces@4791 d7cf8633-e32d-0410-b094-e92efae38249
---
 mathlib.h   | 3 ++-
 pr_cmds.c   | 6 +-----
 prvm_cmds.c | 8 ++------
 3 files changed, 5 insertions(+), 12 deletions(-)

diff --git a/mathlib.h b/mathlib.h
index 0231e85a..880c51f6 100644
--- a/mathlib.h
+++ b/mathlib.h
@@ -49,7 +49,8 @@ extern vec3_t vec3_origin;
 #define max(A,B) ((A) > (B) ? (A) : (B))
 #endif
 
-#define lhrandom(MIN,MAX) ((rand() & 32767) * (((MAX)-(MIN)) * (1.0f / 32767.0f)) + (MIN))
+//#define lhrandom(MIN,MAX) ((rand() & 32767) * (((MAX)-(MIN)) * (1.0f / 32767.0f)) + (MIN))
+#define lhrandom(MIN,MAX) (((double)rand() / RAND_MAX) * ((MAX)-(MIN)) + (MIN))
 
 #define invpow(base,number) (log(number) / log(base))
 #define log2i(n) ((((n) & 0xAAAAAAAA) != 0 ? 1 : 0) | (((n) & 0xCCCCCCCC) != 0 ? 2 : 0) | (((n) & 0xF0F0F0F0) != 0 ? 4 : 0) | (((n) & 0xFF00FF00) != 0 ? 8 : 0) | (((n) & 0xFFFF0000) != 0 ? 16 : 0))
diff --git a/pr_cmds.c b/pr_cmds.c
index 6e021a72..ddf9d458 100644
--- a/pr_cmds.c
+++ b/pr_cmds.c
@@ -594,11 +594,7 @@ random()
 */
 void PF_random (void)
 {
-	float		num;
-
-	num = (rand ()&0x7fff) / ((float)0x7fff);
-
-	G_FLOAT(OFS_RETURN) = num;
+	G_FLOAT(OFS_RETURN) = lhrandom(0, 1);
 }
 
 /*
diff --git a/prvm_cmds.c b/prvm_cmds.c
index 2ee88b1c..e9d9afe6 100644
--- a/prvm_cmds.c
+++ b/prvm_cmds.c
@@ -559,13 +559,9 @@ float random()
 */
 void VM_random (void)
 {
-	float		num;
-
 	VM_SAFEPARMCOUNT(0,VM_random);
 
-	num = (rand ()&0x7fff) / ((float)0x7fff);
-
-	PRVM_G_FLOAT(OFS_RETURN) = num;
+	PRVM_G_FLOAT(OFS_RETURN) = lhrandom(0, 1);
 }
 
 /*
@@ -1136,7 +1132,7 @@ void VM_precache_sound (void)
 	s = PRVM_G_STRING(OFS_PARM0);
 	PRVM_G_INT(OFS_RETURN) = PRVM_G_INT(OFS_PARM0);
 	VM_CheckEmptyString (s);
-	
+
 	if(!S_PrecacheSound (s,true, true))
 		Con_Printf("VM_precache_sound: Failed to load %s for %s\n", s, PRVM_NAME);
 }
-- 
2.39.2