#include <math.h>
#include <float.h>

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Macros
Circle constants
#define	BJ_PI_F (3.14159265358979323846f)
#define	BJ_TAU_F (6.28318530717958647692f)
#define	BJ_PI_D (3.14159265358979323846264338327950288)
#define	BJ_TAU_D (6.28318530717958647692528676655900576)
#define	BJ_PI_L (3.141592653589793238462643383279502884L)
#define	BJ_TAU_L (6.283185307179586476925286766559005768L)
#define	BJ_PI (BJ_F(3.141592653589793238462643383279502884))
#define	BJ_TAU (BJ_F(6.283185307179586476925286766559005768))
Typed wrappers (float)
Thin aliases to <math.h> float functions.
#define	bj_absf fabsf
#define	bj_acosf acosf
#define	bj_atan2f atan2f
#define	bj_copysignf copysignf
#define	bj_cosf cosf
#define	bj_expf expf
#define	bj_floorf floorf
#define	bj_fmodf fmodf
#define	bj_logf logf
#define	bj_maxf fmaxf
#define	bj_minf fminf
#define	bj_powf powf
#define	bj_roundf roundf
#define	bj_sinf sinf
#define	bj_sqrtf sqrtf
#define	bj_tanf tanf
Typed wrappers (double)
Thin aliases to <math.h> double functions.
#define	bj_absd fabs
#define	bj_acosd acos
#define	bj_atan2d atan2
#define	bj_copysignd copysign
#define	bj_cosd cos
#define	bj_expd exp
#define	bj_floord floor
#define	bj_fmodd fmod
#define	bj_logd log
#define	bj_maxd fmax
#define	bj_mind fmin
#define	bj_powd pow
#define	bj_roundd round
#define	bj_sind sin
#define	bj_sqrtd sqrt
#define	bj_tand tan
Typed wrappers (long double)
Thin aliases to <math.h> long double functions.
#define	bj_absl fabsl
#define	bj_acosl acosl
#define	bj_atan2l atan2l
#define	bj_copysignl copysignl
#define	bj_cosl cosl
#define	bj_expl expl
#define	bj_floorl floorl
#define	bj_fmodl fmodl
#define	bj_logl logl
#define	bj_maxl fmaxl
#define	bj_minl fminl
#define	bj_powl powl
#define	bj_roundl roundl
#define	bj_sinl sinl
#define	bj_sqrtl sqrtl
#define	bj_tanl tanl
Precision-dispatch to match bj_real
Map generic bj_* names to the active precision.
#define	bj_abs bj_absf
#define	bj_acos bj_acosf
#define	bj_atan2 bj_atan2f
#define	bj_copysign bj_copysignf
#define	bj_cos bj_cosf
#define	bj_exp bj_expf
#define	bj_floor bj_floorf
#define	bj_fmod bj_fmodf
#define	bj_log bj_logf
#define	bj_max bj_maxf
#define	bj_min bj_minf
#define	bj_pow bj_powf
#define	bj_round bj_roundf
#define	bj_sin bj_sinf
#define	bj_sqrt bj_sqrtf
#define	bj_tan bj_tanf

Functions
Scalar utilities
Generic scalar helpers. All arguments and results are bj_real.
static bj_real	bj_clamp (bj_real x, bj_real lo, bj_real hi)
static bj_real	bj_step (bj_real edge, bj_real x)
static bj_real	bj_smoothstep (bj_real e0, bj_real e1, bj_real x)
static bj_real	bj_fract (bj_real x)
static bj_real	bj_mod (bj_real x, bj_real y)
Absolute-epsilon comparisons
Comparisons using BJ_EPSILON as an absolute tolerance.
static int	bj_real_eq (bj_real a, bj_real b)
static int	bj_real_neq (bj_real a, bj_real b)
static int	bj_real_lt (bj_real a, bj_real b)
static int	bj_real_gt (bj_real a, bj_real b)
static int	bj_real_lte (bj_real a, bj_real b)
static int	bj_real_gte (bj_real a, bj_real b)
static int	bj_real_cmp (bj_real a, bj_real b)
Relative-epsilon comparisons
Comparisons using a scale-dependent tolerance.
static bj_real	bj_real_relative_scale (bj_real a, bj_real b)
static int	bj_real_eq_rel (bj_real a, bj_real b)
static int	bj_real_neq_rel (bj_real a, bj_real b)
static int	bj_real_lt_rel (bj_real a, bj_real b)
static int	bj_real_gt_rel (bj_real a, bj_real b)
static int	bj_real_lte_rel (bj_real a, bj_real b)
static int	bj_real_gte_rel (bj_real a, bj_real b)
static int	bj_real_cmp_rel (bj_real a, bj_real b)
Zero tests and helpers
Utilities for zero checks and safe normalization.
static int	bj_real_is_zero (bj_real x)
static int	bj_real_is_zero_scaled (bj_real x, bj_real scale)
static bj_real	bj_real_snap_zero (bj_real x)
static bj_real	bj_real_snorm_safe (bj_real x, bj_real len)

Real type selection and helpers
#define	BJ_F(x)
#define	BJ_EPSILON (FLT_EPSILON)
#define	BJ_FI(x)
#define	BJ_FZERO (BJ_F(0.0))
typedef float	bj_real

Detailed Description

C99 math shim with bj_real precision type and scalar utilities.

Macros

Functions

Real type selection and helpers

Detailed Description