diff options
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 5abd9a0d06..b730676b78 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 @@ -76,6 +77,8 @@ const F32 OO_SQRT3 = 0.577350269189625764509f; 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; @@ -112,6 +115,12 @@ 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; |