class SG_EXPORT osg::StateAttribute

Base class for state attribuets

Inheritance:

Public Methods

StateAttribute()

StateAttribute(const StateAttribute& sa, const CopyOp& copyop=CopyOp::SHALLOW_COPY)

virtual Object* cloneType() const = 0

Clone the type of an attribute, with Object* return type.

virtual Object* clone(const CopyOp&) const = 0

Clone an attribute, with Object* return type.

virtual bool isSameKindAs(const Object* obj) const

return true if this and obj are of the same kind of object

virtual const char* className() const

return the name of the attribute's class type

virtual const Type getType() const = 0

return the Type identifier of the attribute's class type

virtual int compare(const StateAttribute& sa) const = 0

return -1 if *this < *rhs, 0 if *this==*rhs, 1 if *this>*rhs

bool operator < (const StateAttribute& rhs) const

bool operator == (const StateAttribute& rhs) const

bool operator != (const StateAttribute& rhs) const

virtual void setStateSetModes(StateSet&, const GLModeValue) const

virtual void apply(State&) const = 0

apply the OpenGL state attributes.

virtual void compile(State&) const

default to nothing to compile - all state is applied immediately.

Public Members

typedef GLenum GLMode

GLMode is the value used in glEnable/glDisable(mode)

typedef unsigned int GLModeValue

GLModeValue is used to specified whether an mode is enabled (ON) or disabled (OFF).

typedef unsigned int OverrideValue

Override is used to specified the override behavior of StateAttributes from from parent to children.

enum Values

list values which can be used in to set either GLModeValues or OverrideValues.

typedef unsigned int Type

Type identifier to differentiate between different state types.

enum Types

Values of StateAttribute::Type used to aid identification of different StateAttribute subclasses.

Protected Methods

virtual ~StateAttribute()

Inherited from Object:

Inherited from Referenced:

Public Methods

inline Referenced& operator = (Referenced&)

inline void ref() const

inline void unref() const

inline const int referenceCount() const

Protected Fields

mutable int _refCount

Documentation

Base class for state attribuets

typedef GLenum GLMode

GLMode is the value used in glEnable/glDisable(mode)

typedef unsigned int GLModeValue

GLModeValue is used to specified whether an mode is enabled (ON) or disabled (OFF). GLMoveValue is also used to specify the override behavior of modes from parent to children. See enum Value description for more details.

typedef unsigned int OverrideValue

Override is used to specified the override behavior of StateAttributes from from parent to children. See enum Value description for more details.

enum Values

list values which can be used in to set either GLModeValues or OverrideValues. When using in conjunction with GLModeValues all Values have meaning. When using in conjection with StateAttribute OverrideValue only OFF,OVERRIDE and INHERIT are meaningful. However, they are useful when using GLModeValue and OverrideValue in conjunction with each other as when using StateSet::setAttributeAndModes(..).

OFF

means that associated GLMode and Override is disabled

ON

means that associated GLMode is enabled and Override is disabled

OVERRIDE

Overriding of GLMode's or StateAttributes is enabled

OVERRIDE_OFF

Equivilant to OFF | OVERRIDE

OVERRIDE_ON

Equivilant to ON | OVERRIDE

INHERIT

means that GLMode or StateAttribute should in inherited from above

typedef unsigned int Type

Type identifier to differentiate between different state types.

enum Types

Values of StateAttribute::Type used to aid identification of different StateAttribute subclasses. Each subclass defines it own value in the virtual Type getType() method. When extending the osg's StateAttribute's simply define your own Type value which is unique, using the StateAttribute::Type enum as a guide of what values to use. If your new subclass needs to override a standard StateAttriubte then simple use that types value.

TEXTURE

TEXTURE_0

TEXTURE_1

TEXTURE_2

TEXTURE_3

MATERIAL

ALPHAFUNC

ANTIALIAS

COLORTABLE

CULLFACE

FOG

FRONTFACE

LIGHT

LIGHT_0

LIGHT_1

LIGHT_2

LIGHT_3

LIGHT_4

LIGHT_5

LIGHT_6

LIGHT_7

POINT

LINEWIDTH

SHADEMODEL

POLYGONMODE

POLYGONOFFSET

TEXENV

TEXGEN

TEXMAT

TRANSPARENCY

STENCIL

COLORMASK

DEPTH

VIEWPORT

CLIPPLANE

CLIPPLANE_0

CLIPPLANE_1

CLIPPLANE_2

CLIPPLANE_3

CLIPPLANE_4

CLIPPLANE_5

COLORMATRIX

StateAttribute()

StateAttribute(const StateAttribute& sa, const CopyOp& copyop=CopyOp::SHALLOW_COPY)

virtual Object* cloneType() const = 0

Clone the type of an attribute, with Object* return type. Must be defined by derived classes.

virtual Object* clone(const CopyOp&) const = 0

Clone an attribute, with Object* return type. Must be defined by derived classes.

virtual bool isSameKindAs(const Object* obj) const

return true if this and obj are of the same kind of object

virtual const char* className() const

return the name of the attribute's class type

virtual const Type getType() const = 0

return the Type identifier of the attribute's class type

virtual int compare(const StateAttribute& sa) const = 0

return -1 if *this < *rhs, 0 if *this==*rhs, 1 if *this>*rhs

bool operator < (const StateAttribute& rhs) const

bool operator == (const StateAttribute& rhs) const

bool operator != (const StateAttribute& rhs) const

virtual void setStateSetModes(StateSet&, const GLModeValue) const

virtual void apply(State&) const = 0

apply the OpenGL state attributes. The global state for the current OpenGL context is passed in to allow the StateAttribute to obtain details on the the current context and state.

virtual void compile(State&) const

default to nothing to compile - all state is applied immediately.

virtual ~StateAttribute()

Direct child classes:

Viewport
Transparency
Texture
TexMat
TexGen
TexEnv
Stencil
ShadeModel
PolygonOffset
PolygonMode
Point
Material
LineWidth
Light
FrontFace
Fog
Depth
CullFace
ColorMatrix
ColorMask
ClipPlane
AlphaFunc

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