class SG_EXPORT osg::Viewport

Encapsulte OpenGL glViewport

Inheritance:

Public Methods

Viewport()

Viewport(int x, int y, int width, int height)

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

Copy constructor using CopyOp to manage deep vs shallow copy

META_StateAttribute(osg, 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(int x, int y, int width, int height)

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

inline int x() const

inline int y() const

inline int width() const

inline int height() const

inline bool valid() const

inline 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 Classes

enum Values

enum Types

struct ModeUsage

Public Methods

virtual Object* cloneType() const

virtual Object* clone(const CopyOp&) const

virtual bool isSameKindAs(const Object* obj) const

virtual const char* libraryName() const

virtual const char* className() const

virtual Type getType() const

virtual bool isTextureAttribute() const

bool operator < (const StateAttribute& rhs) const

bool operator == (const StateAttribute& rhs) const

bool operator != (const StateAttribute& rhs) const

virtual bool getModeUsage(ModeUsage&) const

virtual void compileGLObjects(State&) const

virtual void releaseGLObjects(State* =0) const

Public

typedef GLenum GLMode

typedef unsigned int GLModeValue

typedef unsigned int OverrideValue

typedef unsigned int Type

Inherited from Object:

Public Classes

enum DataVariance

Public Methods

inline void setDataVariance(DataVariance dv)

inline DataVariance getDataVariance() const

inline void setUserData(Referenced* obj)

inline Referenced* getUserData()

inline const Referenced* getUserData() const

Protected Fields

DataVariance _dataVariance

ref_ptr<Referenced> _userData

Inherited from Referenced:

Public Methods

inline Referenced& operator = (const Referenced&)

static void setDeleteHandler(DeleteHandler* handler)

static DeleteHandler* getDeleteHandler()

inline void ref() const

inline void unref_nodelete() const

inline int referenceCount() const

inline void unref() const

Protected Fields

mutable OpenThreads::Mutex _refMutex

mutable int _refCount

Documentation

Encapsulte OpenGL glViewport

Viewport()

Viewport(int x, int y, int width, int height)

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

Copy constructor using CopyOp to manage deep vs shallow copy

META_StateAttribute(osg, 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(int x, int y, int width, int height)

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

inline int x() const

inline int y() const

inline int width() const

inline int height() const

inline bool valid() const

inline 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 current 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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