renamed mVarianceSum to mSumOfSquares to be more clear

fixed normalization assertions to work with megaprims
added is_zero() utility function
fixed unit declarations to be more clear
fixed texture cache hit rate always being 0

1 files changed, 6 insertions, 0 deletions

diff --git a/indra/llmath/llmath.h b/indra/llmath/llmath.h
index cad2461e9c..eeb5cd3ee6 100755
--- a/indra/llmath/llmath.h
+++ b/indra/llmath/llmath.h
@@ -113,6 +113,12 @@ inline bool is_approx_zero( F32 f ) { return (-F_APPROXIMATELY_ZERO < f) && (f <
 // WARNING: Infinity is comparable with F32_MAX and negative 
 // infinity is comparable with F32_MIN
 
+// handles negative and positive zeros
+inline bool is_zero(F32 x)
+{
+	return (*(U32*)(&x) & 0x7fffffff) == 0;
+}
+
 inline bool is_approx_equal(F32 x, F32 y)
 {
 	const S32 COMPARE_MANTISSA_UP_TO_BIT = 0x02;