From 2a4afedf90d055cca16bb0ec53542ac67d2ae2c6 Mon Sep 17 00:00:00 2001
From: McCabe Maxsted
Date: Wed, 20 Jul 2011 17:52:25 -0700
Subject: Added ll_frand(min, max) function

---
 linden/indra/llcommon/llrand.cpp | 15 +++++++++++++++
 linden/indra/llcommon/llrand.h   |  5 +++++
 2 files changed, 20 insertions(+)

(limited to 'linden/indra/llcommon')

diff --git a/linden/indra/llcommon/llrand.cpp b/linden/indra/llcommon/llrand.cpp
index 0b2f8b8..fb2bcd3 100644
--- a/linden/indra/llcommon/llrand.cpp
+++ b/linden/indra/llcommon/llrand.cpp
@@ -156,6 +156,21 @@ F32 ll_frand(F32 val)
 	return rv;
 }
 
+F32 ll_frand(F32 min, F32 max)
+{
+	llassert(min <= max); 
+	F32 rv = min + ((max - min) * ll_internal_random_float());
+	if (rv > 0)
+	{
+		if (rv >= max) return 0.0f;
+	}
+	else
+	{
+		if (rv <= min) return 0.0f;
+	}
+	return rv;
+}
+
 F64 ll_drand()
 {
 	return ll_internal_random_double();
diff --git a/linden/indra/llcommon/llrand.h b/linden/indra/llcommon/llrand.h
index 73ea179..0b68a17 100644
--- a/linden/indra/llcommon/llrand.h
+++ b/linden/indra/llcommon/llrand.h
@@ -83,6 +83,11 @@ LL_COMMON_API F32 ll_frand();
 LL_COMMON_API F32 ll_frand(F32 val);
 
 /**
+ *@brief Generate a float from [min, max].
+ */
+LL_COMMON_API F32 ll_frand(F32 min, F32 max);
+
+/**
  *@brief Generate a double from [0, 1.0).
  */
 LL_COMMON_API F64 ll_drand();
-- 
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