btScalar.h File Reference

#include <math.h>
#include <stdlib.h>
#include <cstdlib>
#include <cfloat>
#include <float.h>
#include <assert.h>

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Classes
struct	btTypedObject
	rudimentary class to provide type info More...
Defines
#define	BT_BULLET_VERSION 276
#define	SIMD_FORCE_INLINE inline
#define	ATTRIBUTE_ALIGNED16(a) a
#define	ATTRIBUTE_ALIGNED64(a) a
#define	ATTRIBUTE_ALIGNED128(a) a
#define	btAssert(x)
#define	btFullAssert(x)
#define	btLikely(_c) _c
#define	btUnlikely(_c) _c
#define	BT_LARGE_FLOAT 1e18f
#define	BT_DECLARE_ALIGNED_ALLOCATOR()
#define	SIMD_2_PI btScalar(6.283185307179586232)
#define	SIMD_PI (SIMD_2_PI * btScalar(0.5))
#define	SIMD_HALF_PI (SIMD_2_PI * btScalar(0.25))
#define	SIMD_RADS_PER_DEG (SIMD_2_PI / btScalar(360.0))
#define	SIMD_DEGS_PER_RAD (btScalar(360.0) / SIMD_2_PI)
#define	SIMDSQRT12 btScalar(0.7071067811865475244008443621048490)
#define	btRecipSqrt(x) ((btScalar)(btScalar(1.0)/btSqrt(btScalar(x))))
#define	SIMD_EPSILON FLT_EPSILON
#define	SIMD_INFINITY FLT_MAX
#define	BT_DECLARE_HANDLE(name) typedef struct name##__ { int unused; } *name
#define	btFsels(a, b, c) (btScalar)btFsel(a,b,c)
Typedefs
typedef float	btScalar
	The btScalar type abstracts floating point numbers, to easily switch between double and single floating point precision.
Functions
int	btGetVersion ()
btScalar	btSqrt (btScalar y)
btScalar	btFabs (btScalar x)
btScalar	btCos (btScalar x)
btScalar	btSin (btScalar x)
btScalar	btTan (btScalar x)
btScalar	btAcos (btScalar x)
btScalar	btAsin (btScalar x)
btScalar	btAtan (btScalar x)
btScalar	btAtan2 (btScalar x, btScalar y)
btScalar	btExp (btScalar x)
btScalar	btLog (btScalar x)
btScalar	btPow (btScalar x, btScalar y)
btScalar	btFmod (btScalar x, btScalar y)
btScalar	btAtan2Fast (btScalar y, btScalar x)
bool	btFuzzyZero (btScalar x)
bool	btEqual (btScalar a, btScalar eps)
bool	btGreaterEqual (btScalar a, btScalar eps)
int	btIsNegative (btScalar x)
btScalar	btRadians (btScalar x)
btScalar	btDegrees (btScalar x)
btScalar	btFsel (btScalar a, btScalar b, btScalar c)
bool	btMachineIsLittleEndian ()
unsigned	btSelect (unsigned condition, unsigned valueIfConditionNonZero, unsigned valueIfConditionZero)
	btSelect avoids branches, which makes performance much better for consoles like Playstation 3 and XBox 360 Thanks Phil Knight.
int	btSelect (unsigned condition, int valueIfConditionNonZero, int valueIfConditionZero)
float	btSelect (unsigned condition, float valueIfConditionNonZero, float valueIfConditionZero)
template<typename T >
void	btSwap (T &a, T &b)
unsigned	btSwapEndian (unsigned val)
unsigned short	btSwapEndian (unsigned short val)
unsigned	btSwapEndian (int val)
unsigned short	btSwapEndian (short val)
unsigned int	btSwapEndianFloat (float d)
	btSwapFloat uses using char pointers to swap the endianness
float	btUnswapEndianFloat (unsigned int a)
void	btSwapEndianDouble (double d, unsigned char *dst)
double	btUnswapEndianDouble (const unsigned char *src)
btScalar	btNormalizeAngle (btScalar angleInRadians)

Define Documentation

#define ATTRIBUTE_ALIGNED128 ( a ) a

Definition at line 174 of file btScalar.h.

#define ATTRIBUTE_ALIGNED16 ( a ) a

Definition at line 172 of file btScalar.h.

#define ATTRIBUTE_ALIGNED64 ( a ) a

Definition at line 173 of file btScalar.h.

#define BT_BULLET_VERSION 276

Definition at line 33 of file btScalar.h.

#define BT_DECLARE_ALIGNED_ALLOCATOR ( )

Value:

SIMD_FORCE_INLINE void* operator new(size_t sizeInBytes)   { return btAlignedAlloc(sizeInBytes,16); }   \
   SIMD_FORCE_INLINE void  operator delete(void* ptr)         { btAlignedFree(ptr); }   \
   SIMD_FORCE_INLINE void* operator new(size_t, void* ptr)   { return ptr; }   \
   SIMD_FORCE_INLINE void  operator delete(void*, void*)      { }   \
   SIMD_FORCE_INLINE void* operator new[](size_t sizeInBytes)   { return btAlignedAlloc(sizeInBytes,16); }   \
   SIMD_FORCE_INLINE void  operator delete[](void* ptr)         { btAlignedFree(ptr); }   \
   SIMD_FORCE_INLINE void* operator new[](size_t, void* ptr)   { return ptr; }   \
   SIMD_FORCE_INLINE void  operator delete[](void*, void*)      { }   \

Definition at line 210 of file btScalar.h.

#define BT_DECLARE_HANDLE ( name ) typedef struct name##__ { int unused; } *name

Definition at line 338 of file btScalar.h.

#define BT_LARGE_FLOAT 1e18f

Definition at line 205 of file btScalar.h.

#define btAssert ( x )

Definition at line 182 of file btScalar.h.

#define btFsels	(	a,
		b,
		c	)	(btScalar)btFsel(a,b,c)

Definition at line 346 of file btScalar.h.

#define btFullAssert ( x )

Definition at line 186 of file btScalar.h.

#define btLikely ( _c ) _c

Definition at line 187 of file btScalar.h.

#define btRecipSqrt ( x ) ((btScalar)(btScalar(1.0)/btSqrt(btScalar(x))))

Definition at line 294 of file btScalar.h.

#define btUnlikely ( _c ) _c

Definition at line 188 of file btScalar.h.

#define SIMD_2_PI btScalar(6.283185307179586232)

Definition at line 287 of file btScalar.h.

#define SIMD_DEGS_PER_RAD (btScalar(360.0) / SIMD_2_PI)

Definition at line 291 of file btScalar.h.

#define SIMD_EPSILON FLT_EPSILON

Definition at line 301 of file btScalar.h.

#define SIMD_FORCE_INLINE inline

Definition at line 167 of file btScalar.h.

#define SIMD_HALF_PI (SIMD_2_PI * btScalar(0.25))

Definition at line 289 of file btScalar.h.

#define SIMD_INFINITY FLT_MAX

Definition at line 302 of file btScalar.h.

#define SIMD_PI (SIMD_2_PI * btScalar(0.5))

Definition at line 288 of file btScalar.h.

#define SIMD_RADS_PER_DEG (SIMD_2_PI / btScalar(360.0))

Definition at line 290 of file btScalar.h.

#define SIMDSQRT12 btScalar(0.7071067811865475244008443621048490)

Definition at line 292 of file btScalar.h.

Typedef Documentation

typedef float btScalar

The btScalar type abstracts floating point numbers, to easily switch between double and single floating point precision.

Definition at line 203 of file btScalar.h.

Function Documentation

btScalar btAcos ( btScalar x ) [inline]

Definition at line 264 of file btScalar.h.

btScalar btAsin ( btScalar x ) [inline]

Definition at line 271 of file btScalar.h.

btScalar btAtan ( btScalar x ) [inline]

Definition at line 278 of file btScalar.h.

btScalar btAtan2	(	btScalar	x,
		btScalar	y
	)			`[inline]`

Definition at line 279 of file btScalar.h.

btScalar btAtan2Fast	(	btScalar	y,
		btScalar	x
	)			`[inline]`

Definition at line 305 of file btScalar.h.

btScalar btCos ( btScalar x ) [inline]

Definition at line 261 of file btScalar.h.

btScalar btDegrees ( btScalar x ) [inline]

Definition at line 336 of file btScalar.h.

bool btEqual	(	btScalar	a,
		btScalar	eps
	)			`[inline]`

Definition at line 323 of file btScalar.h.

btScalar btExp ( btScalar x ) [inline]

Definition at line 280 of file btScalar.h.

btScalar btFabs ( btScalar x ) [inline]

Definition at line 260 of file btScalar.h.

btScalar btFmod	(	btScalar	x,
		btScalar	y
	)			`[inline]`

Definition at line 283 of file btScalar.h.

btScalar btFsel	(	btScalar	a,
		btScalar	b,
		btScalar	c
	)			`[inline]`

Definition at line 341 of file btScalar.h.

bool btFuzzyZero ( btScalar x ) [inline]

Definition at line 321 of file btScalar.h.

int btGetVersion ( ) [inline]

Definition at line 35 of file btScalar.h.

bool btGreaterEqual	(	btScalar	a,
		btScalar	eps
	)			`[inline]`

Definition at line 326 of file btScalar.h.

int btIsNegative ( btScalar x ) [inline]

Definition at line 331 of file btScalar.h.

btScalar btLog ( btScalar x ) [inline]

Definition at line 281 of file btScalar.h.

bool btMachineIsLittleEndian ( ) [inline]

Definition at line 349 of file btScalar.h.

btScalar btNormalizeAngle ( btScalar angleInRadians ) [inline]

Definition at line 487 of file btScalar.h.

btScalar btPow	(	btScalar	x,
		btScalar	y
	)			`[inline]`

Definition at line 282 of file btScalar.h.

btScalar btRadians ( btScalar x ) [inline]

Definition at line 335 of file btScalar.h.

float btSelect	(	unsigned	condition,
		float	valueIfConditionNonZero,
		float	valueIfConditionZero
	)			`[inline]`

Definition at line 379 of file btScalar.h.

int btSelect	(	unsigned	condition,
		int	valueIfConditionNonZero,
		int	valueIfConditionZero
	)			`[inline]`

Definition at line 373 of file btScalar.h.

unsigned btSelect	(	unsigned	condition,
		unsigned	valueIfConditionNonZero,
		unsigned	valueIfConditionZero
	)			`[inline]`

btSelect avoids branches, which makes performance much better for consoles like Playstation 3 and XBox 360 Thanks Phil Knight.

Definition at line 363 of file btScalar.h.

btScalar btSin ( btScalar x ) [inline]

Definition at line 262 of file btScalar.h.

btScalar btSqrt ( btScalar y ) [inline]

Definition at line 240 of file btScalar.h.

template<typename T >

void btSwap	(	T &	a,
		T &	b
	)			`[inline]`

Definition at line 388 of file btScalar.h.

unsigned short btSwapEndian ( short val ) [inline]

Definition at line 412 of file btScalar.h.

unsigned btSwapEndian ( int val ) [inline]

Definition at line 407 of file btScalar.h.

unsigned short btSwapEndian ( unsigned short val ) [inline]

Definition at line 402 of file btScalar.h.

unsigned btSwapEndian ( unsigned val ) [inline]

Definition at line 397 of file btScalar.h.

void btSwapEndianDouble	(	double	d,
		unsigned char *	dst
	)			`[inline]`

Definition at line 453 of file btScalar.h.

unsigned int btSwapEndianFloat ( float d ) [inline]

btSwapFloat uses using char pointers to swap the endianness

btSwapFloat/btSwapDouble will NOT return a float, because the machine might 'correct' invalid floating point values Not all values of sign/exponent/mantissa are valid floating point numbers according to IEEE 754. When a floating point unit is faced with an invalid value, it may actually change the value, or worse, throw an exception. In most systems, running user mode code, you wouldn't get an exception, but instead the hardware/os/runtime will 'fix' the number for you. so instead of returning a float/double, we return integer/long long integer

Definition at line 423 of file btScalar.h.

btScalar btTan ( btScalar x ) [inline]

Definition at line 263 of file btScalar.h.

double btUnswapEndianDouble ( const unsigned char * src ) [inline]

Definition at line 469 of file btScalar.h.

float btUnswapEndianFloat ( unsigned int a ) [inline]

Definition at line 437 of file btScalar.h.

btScalar.h File Reference

Classes

Defines

Typedefs

Functions

Define Documentation

Typedef Documentation

Function Documentation