Added ll_frand(min, max) function

2 files changed, 20 insertions, 0 deletions

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();