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

SoGLUpdateAreaElement::~SoGLUpdateAreaElement () [protected], [virtual]¶

The destructor.

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.

void SoGLUpdateAreaElement::initClass (void) [static]¶

This static method initializes static data for the SoGLUpdateAreaElement class.

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.

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.

void SoGLUpdateAreaElement::pop (SoState * state, const SoElement * prevTopElement) [virtual]¶

This method is callled 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.

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.

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 scenegraph traversal caching operations.

Implements SoElement.

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.

SbBool SoGLUpdateAreaElement::get (SoState *const state, SbVec2f & origin, SbVec2f & size) [static]¶

Returns the current update area.

See also

SbVec2f SoGLUpdateAreaElement::getDefaultOrigin (void) [static]¶

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

SbVec2f SoGLUpdateAreaElement::getDefaultSize (void) [static]¶

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

SoGLUpdateAreaElement::origin [protected]¶

FIXME: write doc

SoGLUpdateAreaElement::size [protected]¶

FIXME: write doc