qnan.h File Reference

Some utilities for our dealings with qnans. More...

#include <assimp/defs.h>
#include <limits>
#include <stdint.h>

Go to the source code of this file.

Classes
union	_IEEESingle
union	_IEEEDouble

Functions
AI_FORCE_INLINE bool	is_qnan (float in)
AI_FORCE_INLINE bool	is_qnan (double in)
AI_FORCE_INLINE bool	is_special_float (float in)
	check whether a float is either NaN or (+/-) INF. More...
AI_FORCE_INLINE bool	is_special_float (double in)
	check whether a double is either NaN or (+/-) INF. More...
template<class TReal >
AI_FORCE_INLINE bool	is_not_qnan (TReal in)
AI_FORCE_INLINE ai_real	get_qnan ()
	Get a fresh qnan.

Detailed Description

Some utilities for our dealings with qnans.

Note

Some loaders use qnans to mark invalid values tempoarily, also Assimp explicitly enforces undefined normals to be set to qnan. qnan utilities are available in standard libraries (C99 for example) but last time I checked compiler coverage was so bad that I decided to reinvent the wheel.

Function Documentation

is_not_qnan()

template<class TReal >

AI_FORCE_INLINE bool is_not_qnan

(

TReal

in

)

Check whether a float is NOT qNaN.

Parameters

in	Input value

is_qnan() [1/2]

AI_FORCE_INLINE bool is_qnan

(

double

in

)

Check whether a given double is qNaN.

Parameters

in	Input value

is_qnan() [2/2]

AI_FORCE_INLINE bool is_qnan

(

float

in

)

Check whether a given float is qNaN.

Parameters

in	Input value

is_special_float() [1/2]

AI_FORCE_INLINE bool is_special_float

(

double

in

)

check whether a double is either NaN or (+/-) INF.

Denorms return false, they're treated like normal values.

Parameters

in	Input value

is_special_float() [2/2]

AI_FORCE_INLINE bool is_special_float

(

float

in

)

check whether a float is either NaN or (+/-) INF.

Denorms return false, they're treated like normal values.

Parameters

in	Input value