Floating point utility routines

Files
file	csqint.h
	Quick floating point to integer conversions.
Functions
static long	csQfixed16 (float n)
	Quickly convert a floating-point number to 16.16 fixed-point value.
static long	csQfixed24 (float n)
	Quickly convert a floating-point number to 8.24 fixed-point value.
static long	csQfixed8 (float n)
	Quickly convert a floating-point number to 24.8 fixed-point value.
template<typename T >
static long	csQint (T n)
	Quickly truncate the fractional part of a floating-point value and convert it to a long integer using processor and/or number format quirks if available.
static float	csQisqrt (float x)
	This routine is basically equivalent to csQsqrt() except that it returns 1/sqrt(x) rather than the proper square root.
template<typename T >
static long	csQround (T n)
	Quickly round a floating-point value and convert it to a long integer using processor and/or number format quirks if available.
static float	csQsqrt (float x)
	This routine computes sqrt(x) very quickly on Intel and PowerPC platforms.

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Function Documentation

static inline long csQfixed16

(

float

n

)

[inline, static]

Quickly convert a floating-point number to 16.16 fixed-point value.

Definition at line 54 of file csqint.h.

static inline long csQfixed24

(

float

n

)

[inline, static]

Quickly convert a floating-point number to 8.24 fixed-point value.

Definition at line 59 of file csqint.h.

static inline long csQfixed8

(

float

n

)

[inline, static]

Quickly convert a floating-point number to 24.8 fixed-point value.

Definition at line 49 of file csqint.h.

template<typename T >

static long csQint

(

T

n

)

[inline, static]

Quickly truncate the fractional part of a floating-point value and convert it to a long integer using processor and/or number format quirks if available.

Definition at line 36 of file csqint.h.

static float csQisqrt

(

float

x

)

[static]

This routine is basically equivalent to csQsqrt() except that it returns 1/sqrt(x) rather than the proper square root.

It should be used anywhere you need the inverse root (in 3D graphics it is a common situation), because the routine is a little faster than csQsqrt() and also you avoid a division.

Definition at line 98 of file csqsqrt.h.

template<typename T >

static long csQround

(

T

n

)

[inline, static]

Quickly round a floating-point value and convert it to a long integer using processor and/or number format quirks if available.

Definition at line 43 of file csqint.h.

static float csQsqrt

(

float

x

)

[static]

This routine computes sqrt(x) very quickly on Intel and PowerPC platforms.

Definition at line 97 of file csqsqrt.h.