G3D::AlphaFilter Class Reference

How the alpha value should be interpreted for partial coverage. More...

Public Types
enum	Value {   DETECT,   ONE,   BINARY,   COVERAGE_MASK,   BLEND }

Public Member Functions
	AlphaFilter (const G3D::String &x)
	AlphaFilter (char v)
	AlphaFilter (int v)
	AlphaFilter (const G3D::Any &a)
	AlphaFilter ()
	AlphaFilter (const Value v)
void	deserialize (G3D::BinaryInput &b)
unsigned int	hashCode () const
	operator int () const
bool	operator!= (const AlphaFilter ::Value other) const
bool	operator!= (const AlphaFilter other) const
AlphaFilter	operator+ (const int x) const
AlphaFilter &	operator++ ()
AlphaFilter &	operator+= (const int x)
AlphaFilter	operator- (const int x) const
AlphaFilter &	operator-- ()
AlphaFilter &	operator-= (const int x)
bool	operator< (const AlphaFilter other) const
bool	operator< (const Value other) const
bool	operator<= (const Value other) const
bool	operator<= (const AlphaFilter other) const
AlphaFilter &	operator= (const G3D::Any &a)
bool	operator== (const AlphaFilter ::Value other) const
bool	operator== (const AlphaFilter other) const
bool	operator> (const AlphaFilter other) const
bool	operator> (const Value other) const
bool	operator>= (const AlphaFilter other) const
bool	operator>= (const Value other) const
void	serialize (G3D::BinaryOutput &b) const
G3D::Any	toAny () const
const char *	toString () const

Static Public Member Functions
static const char *	classname ()
static int	count ()
static Value	nthValue (int n)
static const char *	toString (int i, Value &v)

Public Attributes
enum G3D::AlphaFilter::Value	value

Detailed Description

How the alpha value should be interpreted for partial coverage.

This must be kept in sync with AlphaFilter.glsl

See also

UniversalMaterial

Member Enumeration Documentation

Value

enum G3D::AlphaFilter::Value

Enumerator
DETECT	Used by UniversalMaterial to specify a default behavior: - use BLEND for surfaces with some 0.0 < alpha < 1.0 - use ONE for surfaces with all alpha = 1.0. use BINARY for surfaces with both alpha = 0 and alpha = 1 at locations, but no intermediate values
ONE	Treat the surface as completely covered, forcing alpha = 1.0 everywhere.
BINARY	Alpha is rounded per sample before being applied. Alpha >= 0.5 is rendered, alpha < 0.5 is discarded. This enables faster deferred shading and more accurate post-processing because the surface can be exactly represented in the GBuffer. It creates some aliasing on surface edges, however.
COVERAGE_MASK	Convert alpha to coverage values using glEnable(GL_SAMPLE_ALPHA_TO_COVERAGE_ARB). Requires a MSAA framebuffer to be bound. Not currently supported by UniversalSurface. See http://www.dhpoware.com/samples/glMultiSampleAntiAliasing.html for an example.
BLEND	Render surfaces with partial coverage from back to front, using Porter and Duff's OVER operator. This leaves the depth buffer inconsistent with the color buffer and requires a sort, but often gives the best appearance. Even surfaces with a binary alpha cutout can benefit from blending because the transition under minification or magnification between alpha = 0 and alpha = 1 will create fractional values.

Constructor & Destructor Documentation

AlphaFilter() [1/6]

G3D::AlphaFilter::AlphaFilter ( const G3D::String &  x )

inlineexplicit

AlphaFilter() [2/6]

G3D::AlphaFilter::AlphaFilter ( const G3D::Any &  a )

inlineexplicit

AlphaFilter() [3/6]

G3D::AlphaFilter::AlphaFilter ( char  v )

inlineexplicit

AlphaFilter() [4/6]

G3D::AlphaFilter::AlphaFilter ( )

inline

AlphaFilter() [5/6]

G3D::AlphaFilter::AlphaFilter ( const Value  v )

inline

AlphaFilter() [6/6]

G3D::AlphaFilter::AlphaFilter ( int  v )

inlineexplicit

Member Function Documentation

classname()

static const char* G3D::AlphaFilter::classname ( )

inlinestatic

count()

static int G3D::AlphaFilter::count ( )

inlinestatic

deserialize()

void G3D::AlphaFilter::deserialize ( G3D::BinaryInput &  b )

inline

hashCode()

unsigned int G3D::AlphaFilter::hashCode ( ) const

inline

nthValue()

static Value G3D::AlphaFilter::nthValue ( int  n )

inlinestatic

operator int()

G3D::AlphaFilter::operator int ( ) const

inline

operator!=() [1/2]

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

inline

operator!=() [2/2]

bool G3D::AlphaFilter::operator!= ( const AlphaFilter ::Value  other ) const

inline

operator+()

AlphaFilter G3D::AlphaFilter::operator+ ( const int  x ) const

inline

operator++()

AlphaFilter& G3D::AlphaFilter::operator++ ( )

inline

operator+=()

AlphaFilter& G3D::AlphaFilter::operator+= ( const int  x )

inline

operator-()

AlphaFilter G3D::AlphaFilter::operator- ( const int  x ) const

inline

operator--()

AlphaFilter& G3D::AlphaFilter::operator-- ( )

inline

operator-=()

AlphaFilter& G3D::AlphaFilter::operator-= ( const int  x )

inline

operator<() [1/2]

bool G3D::AlphaFilter::operator< ( const Value  other ) const

inline

operator<() [2/2]

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

inline

operator<=() [1/2]

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

inline

operator<=() [2/2]

bool G3D::AlphaFilter::operator<= ( const Value  other ) const

inline

operator=()

AlphaFilter& G3D::AlphaFilter::operator= ( const G3D::Any &  a )

inline

operator==() [1/2]

bool G3D::AlphaFilter::operator== ( const AlphaFilter ::Value  other ) const

inline

operator==() [2/2]

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

inline

operator>() [1/2]

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

inline

operator>() [2/2]

bool G3D::AlphaFilter::operator> ( const Value  other ) const

inline

operator>=() [1/2]

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

inline

operator>=() [2/2]

bool G3D::AlphaFilter::operator>= ( const Value  other ) const

inline

serialize()

void G3D::AlphaFilter::serialize ( G3D::BinaryOutput &  b ) const

inline

toAny()

G3D::Any G3D::AlphaFilter::toAny ( ) const

inline

toString() [1/2]

const char* G3D::AlphaFilter::toString ( ) const

inline

toString() [2/2]

static const char* G3D::AlphaFilter::toString ( int  i, Value &  v  )

inlinestatic

Member Data Documentation

value

enum G3D::AlphaFilter::Value G3D::AlphaFilter::value