SoGLUpdateAreaElement Class Reference
Element Classes

The SoGLUpdateAreaElement class is yet to be documented. More...

`#include <Inventor/elements/SoGLUpdateAreaElement.h>`

Inheritance diagram for SoGLUpdateAreaElement:

## Public Member Functions

virtual void | init (SoState *state)
virtual void | push (SoState *state)
virtual void | pop (SoState *state, const SoElement *prevTopElement)
virtual SbBool | matches (const SoElement *element) const
virtual SoElement * | copyMatchInfo () const
Public Member Functions inherited from SoElement
const SoType | getTypeId (void) const
int | getStackIndex (void) const
void | setDepth (const int depth)
int | getDepth (void) const
virtual void | print (FILE *file=stdout) const
virtual | ~SoElement ()

## Static Public Member Functions

static SoType | getClassTypeId (void)
static int | getClassStackIndex (void)
static void * | createInstance (void)
static void | initClass (void)
static void | set (SoState *const state, const SbVec2f &origin, const SbVec2f &size)
static SbBool | get (SoState *const state, SbVec2f &origin, SbVec2f &size)
static SbVec2f | getDefaultOrigin ()
static SbVec2f | getDefaultSize ()
Static Public Member Functions inherited from SoElement
static void | initClass (void)
static SoType | getClassTypeId (void)
static int | getClassStackIndex (void)
static void | initElements (void)
static int | getNumStackIndices (void)
static SoType | getIdFromStackIndex (const int stackIndex)

## Protected Member Functions

virtual | ~SoGLUpdateAreaElement ()
Protected Member Functions inherited from SoElement
| SoElement (void)
void | capture (SoState *const state) const
virtual void | captureThis (SoState *state) const
void | setTypeId (const SoType typeId)
void | setStackIndex (const int index)
SoElement * | getNextInStack (void) const
SoElement * | getNextFree (void) const

## Protected Attributes

SbVec2f | origin
SbVec2f | size
Protected Attributes inherited from SoElement
SoType | typeId
int | stackIndex
int | depth

## Additional Inherited Members

Static Protected Member Functions inherited from SoElement
static SoElement * | getElement (SoState *const state, const int stackIndex)
static const SoElement * | getConstElement (SoState *const state, const int stackIndex)
static int | createStackIndex (const SoType id)
Static Protected Attributes inherited from SoElement
static int | classStackIndex
static SoTypeList * | stackToType

## Detailed Description

The SoGLUpdateAreaElement class is yet to be documented.

FIXME: write doc.

## Constructor & Destructor Documentation

## ~SoGLUpdateAreaElement()

SoGLUpdateAreaElement::~SoGLUpdateAreaElement | ( |  | ) |

protected virtual

Destructor.

## Member Function Documentation

## getClassTypeId()

SoType SoGLUpdateAreaElement::getClassTypeId | ( | void |  | ) |

static

This static method returns the SoType object associated with objects of this class.

## getClassStackIndex()

int SoGLUpdateAreaElement::getClassStackIndex | ( | void |  | ) |

static

This static method returns the state stack index for the class.

## createInstance()

void * SoGLUpdateAreaElement::createInstance | ( | void |  | ) |

static

This API member is considered internal to the library, as it is not likely to be of interest to the application programmer.
Creates a new instance of the class type corresponding to the SoType object.

## initClass()

void SoGLUpdateAreaElement::initClass | ( | void |  | ) |

static

Initialize relevant common data for all instances, like the type system.

## init()

void SoGLUpdateAreaElement::init | ( | SoState * | state | ) |

virtual

This function initializes the element type in the given SoState. It is called for the first element of each enabled element type in SoState objects.

Reimplemented from SoElement.

## push()

void SoGLUpdateAreaElement::push | ( | SoState * | state | ) |

virtual

This method is called every time a new element is required in one of the stacks. This happens when a writable element is requested, using SoState::getElement() or indirectly SoElement::getElement(), and the depth of the current element is less than the state depth.

Override this method if your element needs to copy data from the previous top of stack. The push() method is called on the new element, and the previous element can be found using SoElement::getNextInStack().

Reimplemented from SoElement.

## pop()

void SoGLUpdateAreaElement::pop | ( | SoState * | state,
|  | const SoElement * | prevTopElement )

virtual

This method is called when the state is popped, and the depth of the element is bigger than the current state depth. pop() is called on the new top of stack, and a pointer to the previous top of stack is passed in prevTopElement.

Override this method if you need to copy some state information from the previous top of stack.

Reimplemented from SoElement.

## matches()

SbBool SoGLUpdateAreaElement::matches | ( | const SoElement * | element | ) | const

virtual

This function returns `TRUE` is the element matches another element (of the same class), with respect to cache validity.

If the application programmer's extension element has a matches() function, it should also have a copyMatchInfo() function.

Implements SoElement.

## copyMatchInfo()

SoElement * SoGLUpdateAreaElement::copyMatchInfo | ( | void |  | ) | const

virtual

This function creates a copy of the element that contains enough information to enable the matches() function to work.

Used to help with scene graph traversal caching operations.

Implements SoElement.

## set()

void SoGLUpdateAreaElement::set | ( | SoState *const | state,
|  | const SbVec2f & | origin,
|  | const SbVec2f & | size )

static

Sets the update area. This can, for instance, be used when rendering in the front buffer, to only render parts of the scene during a window expose event. origin and size is in normalized window coordinates.

## get()

SbBool SoGLUpdateAreaElement::get | ( | SoState *const | state,
|  | SbVec2f & | origin,
|  | SbVec2f & | size )

static

Returns the current update area.

See also
  set()

## getDefaultOrigin()

SbVec2f SoGLUpdateAreaElement::getDefaultOrigin | ( | void |  | ) |

static

Returns the default update area origin, (0,0).

## getDefaultSize()

SbVec2f SoGLUpdateAreaElement::getDefaultSize | ( | void |  | ) |

static

Returns the default update area size, (1,1).

## Member Data Documentation

## origin

SbVec2f SoGLUpdateAreaElement::origin

protected

FIXME: write doc

## size

SbVec2f SoGLUpdateAreaElement::size

protected

FIXME: write doc

The documentation for this class was generated from the following files:

- SoGLUpdateAreaElement.h
- SoGLUpdateAreaElement.cpp