class SG_EXPORT osg::Viewport

Encapsulte OpenGL glViewport

Inheritance:

Public Methods

Viewport()

Viewport(const Viewport& vp, const CopyOp& copyop=CopyOp::SHALLOW_COPY)

Copy constructor using CopyOp to manage deep vs shallow copy

META_StateAttribute(Viewport, VIEWPORT)

virtual int compare(const StateAttribute& sa) const

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

inline void setViewport(const int x, const int y, const int width, const int height)

void getViewport(int& x, int& y, int& width, int& height)

inline const int x() const

inline const int y() const

inline const int width() const

inline const int height() const

inline const bool valid() const

inline const float aspectRatio() const

Return the aspcetRatio of the viewport, which is equal to width/height.

inline const osg::Matrix computeWindowMatrix() const

Compute the Window Matrix which takes projected coords into Window coordinates.

virtual void apply(State& state) const

Protected Fields

int _x

int _y

int _width

int _height

Protected Methods

virtual ~Viewport()

Inherited from StateAttribute:

Public Methods

virtual Object* cloneType() const

virtual Object* clone(const CopyOp&) const

virtual bool isSameKindAs(const Object* obj) const

virtual const char* className() const

virtual const Type getType() const

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 compile(State&) const

Public Members

typedef GLenum GLMode

typedef unsigned int GLModeValue

typedef unsigned int OverrideValue

enum Values

typedef unsigned int Type

enum Types

Inherited from Object:

Public Methods

inline void setDataVariance(const DataVariance dv)

inline const DataVariance getDataVariance() const

Public Members

enum DataVariance

Protected Fields

DataVariance _dataVariance

Inherited from Referenced:

Public Methods

inline Referenced& operator = (Referenced&)

inline void ref() const

inline void unref() const

inline void unref_nodelete() const

inline const int referenceCount() const

Protected Fields

mutable int _refCount

Documentation

Encapsulte OpenGL glViewport

Viewport()

Viewport(const Viewport& vp, const CopyOp& copyop=CopyOp::SHALLOW_COPY)

Copy constructor using CopyOp to manage deep vs shallow copy

META_StateAttribute(Viewport, VIEWPORT)

virtual int compare(const StateAttribute& sa) const

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

inline void setViewport(const int x, const int y, const int width, const int height)

void getViewport(int& x, int& y, int& width, int& height)

inline const int x() const

inline const int y() const

inline const int width() const

inline const int height() const

inline const bool valid() const

inline const float aspectRatio() const

Return the aspcetRatio of the viewport, which is equal to width/height. If height is zero, the potental division by zero is avoid by simply returning 1.0f.

inline const osg::Matrix computeWindowMatrix() const

Compute the Window Matrix which takes projected coords into Window coordinates. To converted local coodinates into window coordinates use v_window = v_local * MVPW matrix, where the MVPW matrix is ModelViewMatrix * ProjectionMatrix * WindowMatrix, the later supplied by viewport::computeWindowMatrix(), the ModelView and Projection Matrix can either be sourced from the curre osg::State object, via osgUtil::SceneView or CullVisitor.

virtual void apply(State& state) const

virtual ~Viewport()

int _x

int _y

int _width

int _height

This class has no child classes.

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