SoReplacedElement - Online Linux Manual PageSection : 3
Updated : Mon Jan 25 2021
Source : Version 2.5.0
Note : Coin

NAMESoReplacedElement − The SoReplacedElement class is an abstract element superclass​.

SYNOPSIS
#include <Inventor/elements/SoReplacedElement​.h> Inherits SoElement​. Inherited by SoGLColorIndexElement, SoListenerDopplerElement, SoListenerOrientationElement, and SoListenerPositionElement​.

Public Member Functionsvirtual void init (SoState *state)
virtual SbBool matches (const SoElement *element) const
virtual SoElement * copyMatchInfo () const
uint32_t getNodeId () const
virtual void print (FILE *file) const

Static Public Member Functionsstatic SoType getClassTypeId (void)
static int getClassStackIndex (void)
static void initClass (void)

Protected Member Functionsvirtual ~SoReplacedElement ()

Static Protected Member Functionsstatic SoElement * getElement (SoState *const state, const int stackIndex, SoNode *const node)

Protected Attributesuint32_t nodeId

Additional Inherited Members

Detailed DescriptionThe SoReplacedElement class is an abstract element superclass​. This is the superclass of all elements where the new element data replaces the old data, and where the data the element stores is not just a simple float or integer value​. Apart from this conceptual difference from its superclass, the SoReplacedElement class also overloads the default getElement() method to include a node reference​. This reference is used to fetch the unique node identification number of the node that last changed the element​. The identifier values of nodes in the scenegraph is updated upon any kind of change to a node, so this technique plays an important role in the construction, validation and destruction of internal scenegraph caches​. See also SoAccumulatedElement

Constructor & Destructor Documentation

SoReplacedElement::~SoReplacedElement (void) [protected], [virtual]Destructor​.

Member Function Documentation

void SoReplacedElement::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​. Reimplemented in SoListenerPositionElement, SoListenerOrientationElement, SoListenerDopplerElement, and SoGLColorIndexElement​. References SoElement::init(), and nodeId​. Referenced by SoListenerDopplerElement::init(), SoListenerOrientationElement::init(), and SoListenerPositionElement::init()​.

SbBool SoReplacedElement::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​. References nodeId​.

SoElement * SoReplacedElement::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​. References SoType::createInstance(), SoElement::getTypeId(), and nodeId​.

uint32_t SoReplacedElement::getNodeId (void) constReturns the node identifier for the node that previously updated the SoReplacedElement​. References nodeId​.

void SoReplacedElement::print (FILE * file) const [virtual]This function is for printing element information, and is used mostly for debugging purposes​. Reimplemented from SoElement​. Reimplemented in SoListenerPositionElement, SoListenerOrientationElement, and SoListenerDopplerElement​. References SoType::getName(), SbName::getString(), and SoElement::getTypeId()​.

SoElement * SoReplacedElement::getElement (SoState *const state, const int stackIndex, SoNode *const node) [static], [protected]This function overloads SoElement::getElement() with an extra node parameter, to let us set the SoReplacedElement::nodeId in the element instance before returning​. SoReplacedElement subclasses should use this method to get writable instances​. The identifier values of nodes in the scenegraph is updated upon any kind of change to a node, so this technique plays an important role in the construction, validation and destruction of internal scenegraph caches​. See also SoElement::getElement() References SoElement::getElement(), SoNode::getNodeId(), nodeId, and SoElement::stackIndex​.

Member Data Documentation

uint32_t SoReplacedElement::nodeId [protected]This API member is considered internal to the library, as it is not likely to be of interest to the application programmer​.

Referenced by copyMatchInfo(), getElement(), getNodeId(), init(), and matches()​.

AuthorGenerated automatically by Doxygen for Coin from the source code​.
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