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

Classes
union	_IEEEDouble
	Data structure to represent the bit pattern of a 64 Bit IEEE 754 floating-point number. More...

union	_IEEESingle
	Data structure to represent the bit pattern of a 32 Bit IEEE 754 floating-point number. More...

Functions
AI_FORCE_INLINE ai_real	get_qnan ()
	Get a fresh qnan. More...

template<class TReal >
AI_FORCE_INLINE bool	is_not_qnan (TReal in)
	Check whether a float is NOT qNaN. More...

AI_FORCE_INLINE bool	is_qnan (double in)
	Check whether a given double is qNaN. More...

AI_FORCE_INLINE bool	is_qnan (float in)
	Check whether a given float is qNaN. More...

AI_FORCE_INLINE bool	is_special_float (double in)
	check whether a double is either NaN or (+/-) INF. More...

AI_FORCE_INLINE bool	is_special_float (float in)
	check whether a float is either NaN or (+/-) INF. More...

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

AI_FORCE_INLINE ai_real get_qnan ( )

Get a fresh qnan.

template<class TReal >

AI_FORCE_INLINE bool is_not_qnan ( TReal in )

Check whether a float is NOT qNaN.

Parameters

in	Input value

AI_FORCE_INLINE bool is_qnan ( double in )

Check whether a given double is qNaN.

Parameters

in	Input value

AI_FORCE_INLINE bool is_qnan ( float in )

Check whether a given float is qNaN.

Parameters

in	Input value

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

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