diff options
| author | Richard Linden <none@none> | 2013-10-08 11:59:24 -0700 |
|---|---|---|
| committer | Richard Linden <none@none> | 2013-10-08 11:59:24 -0700 |
| commit | 80dfbbaacd82179e54163ed48b1bc444e3becbd5 (patch) | |
| tree | da3858b58b5ec9c34d6eefa60c4fe87fc5743249 /indra/llmath/llmath.h | |
| parent | f7158bc5afcec1da8b9d2d5a4ed86921e62d4959 (diff) | |
| parent | 2eeee8a9491398697a8f3167bc4f715a3970fc3a (diff) | |
merge from viewer-release
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; |