G3D::snorm8 Class Reference

Represents numbers on [-1, 1] in 8 bits as a signed normalized 0.8 fixed-point value using the same encoding scheme as OpenGL. More...

Public Member Functions
	snorm8 ()
	snorm8 (const snorm8 &other)
	snorm8 (float f)
	Maps f to round(f * 127). More...
uint8	bits () const
	Returns the underlying bits in this representation. More...
	operator float () const
	Returns a number on [-1.0f, 1.0f]. More...
bool	operator!= (const snorm8 other) const
snorm8	operator* (const int i) const
snorm8 &	operator*= (const int i)
snorm8	operator+ (const snorm8 other) const
snorm8 &	operator+= (const snorm8 other)
snorm8	operator- (const snorm8 other) const
snorm8 &	operator-= (const snorm8 other)
snorm8	operator/ (const int i) const
snorm8 &	operator/= (const int i)
bool	operator< (const snorm8 other) const
snorm8	operator<< (const int i) const
snorm8 &	operator<<= (const int i)
bool	operator<= (const snorm8 other) const
bool	operator== (const snorm8 other) const
bool	operator> (const snorm8 other) const
bool	operator>= (const snorm8 other) const
snorm8	operator>> (const int i) const
snorm8 &	operator>>= (const int i)
int8	reinterpretAsInt8 () const
	Returns the underlying bits in this representation. More...

Static Public Member Functions
static snorm8	fromBits (int8 b)
	Equivalent to: More...
static snorm8	one ()
static snorm8	reinterpretFrom (int8 b)
	Equivalent to: More...
static snorm8	zero ()

Detailed Description

Represents numbers on [-1, 1] in 8 bits as a signed normalized 0.8 fixed-point value using the same encoding scheme as OpenGL.

Note that arithmetic operations may over and under-flow, just like int8 arithmetic.

OpenGL specifications can be found here: <www.opengl.org/registry/specs/ARB/shading_language_packing.txt>

Constructor & Destructor Documentation

snorm8() [1/3]

G3D::snorm8::snorm8 ( )

inline

snorm8() [2/3]

G3D::snorm8::snorm8 ( const snorm8 &  other )

inline

snorm8() [3/3]

G3D::snorm8::snorm8 ( float  f )

inlineexplicit

Maps f to round(f * 127).

Member Function Documentation

bits()

uint8 G3D::snorm8::bits ( ) const

inline

Returns the underlying bits in this representation.

Equivalent to:

uint8 i = reinterpret_cast<const uint8&>(u); 

fromBits()

static snorm8 G3D::snorm8::fromBits ( int8  b )

inlinestatic

Equivalent to:

snorm8 u = reinterpret_cast<const snorm8&>(b);

one()

static snorm8 G3D::snorm8::one ( )

inlinestatic

operator float()

G3D::snorm8::operator float ( ) const

inline

Returns a number on [-1.0f, 1.0f].

operator!=()

bool G3D::snorm8::operator!= ( const snorm8  other ) const

inline

operator*()

snorm8 G3D::snorm8::operator* ( const int  i ) const

inline

operator*=()

snorm8& G3D::snorm8::operator*= ( const int  i )

inline

operator+()

snorm8 G3D::snorm8::operator+ ( const snorm8  other ) const

inline

operator+=()

snorm8& G3D::snorm8::operator+= ( const snorm8  other )

inline

operator-()

snorm8 G3D::snorm8::operator- ( const snorm8  other ) const

inline

operator-=()

snorm8& G3D::snorm8::operator-= ( const snorm8  other )

inline

operator/()

snorm8 G3D::snorm8::operator/ ( const int  i ) const

inline

operator/=()

snorm8& G3D::snorm8::operator/= ( const int  i )

inline

operator<()

bool G3D::snorm8::operator< ( const snorm8  other ) const

inline

operator<<()

snorm8 G3D::snorm8::operator<< ( const int  i ) const

inline

operator<<=()

snorm8& G3D::snorm8::operator<<= ( const int  i )

inline

operator<=()

bool G3D::snorm8::operator<= ( const snorm8  other ) const

inline

operator==()

bool G3D::snorm8::operator== ( const snorm8  other ) const

inline

operator>()

bool G3D::snorm8::operator> ( const snorm8  other ) const

inline

operator>=()

bool G3D::snorm8::operator>= ( const snorm8  other ) const

inline

operator>>()

snorm8 G3D::snorm8::operator>> ( const int  i ) const

inline

operator>>=()

snorm8& G3D::snorm8::operator>>= ( const int  i )

inline

reinterpretAsInt8()

int8 G3D::snorm8::reinterpretAsInt8 ( ) const

inline

Returns the underlying bits in this representation.

Equivalent to:

uint8 i = reinterpret_cast<const uint8&>(u); 

reinterpretFrom()

static snorm8 G3D::snorm8::reinterpretFrom ( int8  b )

inlinestatic

Equivalent to:

snorm8 u = reinterpret_cast<const snorm8&>(b);

zero()

static snorm8 G3D::snorm8::zero ( )

inlinestatic