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| author | Baker Linden <baker@lindenlab.com> | 2014-05-08 14:00:55 -0700 |
|---|---|---|
| committer | Baker Linden <baker@lindenlab.com> | 2014-05-08 14:00:55 -0700 |
| commit | 37bfd025aeef7292abb1708577eee80b6e1b91d5 (patch) | |
| tree | 3dab7c728f3a4b67eae30cbbf838dec8747c5e6e /indra/llmath/llmath.h | |
| parent | 1cf659d4481983684c4d5d749d95d56832dbc621 (diff) | |
| parent | d0ef02c23a7a37c8c9bfe3a86bae88bb811fc9fe (diff) | |
viewer-release merge (to 3.7.8)
Diffstat (limited to 'indra/llmath/llmath.h')
| -rwxr-xr-x | indra/llmath/llmath.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/indra/llmath/llmath.h b/indra/llmath/llmath.h index b93f89d674..29db799154 100755 --- a/indra/llmath/llmath.h +++ b/indra/llmath/llmath.h @@ -30,6 +30,7 @@ #include <cmath> #include <cstdlib> #include <vector> +#include <limits> #include "lldefs.h" //#include "llstl.h" // *TODO: Remove when LLString is gone //#include "llstring.h" // *TODO: Remove when LLString is gone @@ -75,6 +76,8 @@ const F32 OO_SQRT2 = 0.7071067811865475244008443621049f; const F32 DEG_TO_RAD = 0.017453292519943295769236907684886f; const F32 RAD_TO_DEG = 57.295779513082320876798154814105f; const F32 F_APPROXIMATELY_ZERO = 0.00001f; +const F32 F_LN10 = 2.3025850929940456840179914546844f; +const F32 OO_LN10 = 0.43429448190325182765112891891661; const F32 F_LN2 = 0.69314718056f; const F32 OO_LN2 = 1.4426950408889634073599246810019f; @@ -111,6 +114,12 @@ 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; |