SoCacheElement(3)

NAME
SoCacheElement - The SoCacheElement class stores and manages the open caches.

SYNOPSIS

#include <Inventor/elements/SoCacheElement.h>

Inherits SoElement.

  Public Member Functions
virtual void init (SoState *state)
virtual void push (SoState *state)
virtual void pop (SoState *state, const SoElement *prevTopElement)
SoCache * getCache (void) const
virtual SbBool matches (const SoElement *element) const
virtual SoElement * copyMatchInfo (void) const
SoCacheElement * getNextCacheElement (void) const

  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, SoCache *const cache)
static SbBool anyOpen (SoState *const state)
static void invalidate (SoState *const state)
static void addElement (SoState *const state, const SoElement *const element)
static void addCacheDependency (SoState *const state, SoCache *const cache)
static SbBool setInvalid (const SbBool newvalue)
static SoCache * getCurrentCache (SoState *const state)

  Protected Member Functions
virtual ~SoCacheElement ()

  Additional Inherited Members

Detailed Description

The SoCacheElement class stores and manages the open caches.

Constructor & Destructor Documentation

  SoCacheElement::~SoCacheElement (void) [protected], [virtual]
The destructor.

Member Function Documentation

  void * SoCacheElement::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 SoCacheElement::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 SoCacheElement::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 SoCacheElement::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.

  void SoCacheElement::set (SoState *const state, SoCache *const cache) [static]
Sets the current cache. The cache is ref'ed before returning.

  SoCache * SoCacheElement::getCache (void) const
This method returns the cache, or NULL if there is no cache.

  SbBool SoCacheElement::anyOpen (SoState *const state) [static]
This method returns TRUE if a cache is currently open.

  void SoCacheElement::invalidate (SoState *const state) [static]
This method invalidates open caches. It should be called by uncacheable nodes.

  SbBool SoCacheElement::matches (const SoElement * element) const [virtual]
SoCacheElement objects should not be compared because you obviously don't cache them in the cache.

Implements SoElement.

  SoElement * SoCacheElement::copyMatchInfo (void) const [virtual]
SoCacheElement objects should not be 'copied' because you obviously don't cache them in the cache.

See also:
    SbBool SoCacheElement::matches(const SoElement * element) const

Implements SoElement.

  SoCacheElement * SoCacheElement::getNextCacheElement (void) const
This method returns the next cache element. That is the next cache element pointing towards the bottom of the state.

  void SoCacheElement::addElement (SoState *const state, const SoElement *const element) [static]
This method adds element to the elements used lists of all the open caches in state.

  void SoCacheElement::addCacheDependency (SoState *const state, SoCache *const cache) [static]
This method creates dependencies on cache for all the open caches in state.

  SbBool SoCacheElement::setInvalid (const SbBool newvalue) [static]
This method returns the old invalidated bit value, and sets it to newvalue.

  SoCache * SoCacheElement::getCurrentCache (SoState *const state) [static]
This method returns the current cache. No cache dependencies are honored.

Author

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