The SoGroup class is a node which managed other node instances. More...

#include <Inventor/nodes/SoGroup.h>

Inheritance diagram for SoGroup:

Public Member Functions
virtual SoType	getTypeId (void) const
	Returns the type identification of an object derived from a class inheriting SoBase. This is used for run-time type checking and "downward" casting. More...

	SoGroup (void)

	SoGroup (int nchildren)

virtual void	addChild (SoNode *node)

virtual void	insertChild (SoNode *child, int newchildindex)

virtual SoNode *	getChild (int index) const

virtual int	findChild (const SoNode *node) const

virtual int	getNumChildren (void) const

virtual void	removeChild (int childindex)

virtual void	removeChild (SoNode *child)

virtual void	removeAllChildren (void)

virtual void	replaceChild (int index, SoNode *newchild)

virtual void	replaceChild (SoNode oldchild, SoNode newchild)

virtual void	doAction (SoAction *action)

virtual void	GLRender (SoGLRenderAction *action)

virtual void	callback (SoCallbackAction *action)

virtual void	getBoundingBox (SoGetBoundingBoxAction *action)

virtual void	getMatrix (SoGetMatrixAction *action)

virtual void	handleEvent (SoHandleEventAction *action)

virtual void	pick (SoPickAction *action)

virtual void	search (SoSearchAction *action)

virtual void	write (SoWriteAction *action)

virtual void	getPrimitiveCount (SoGetPrimitiveCountAction *action)

virtual void	audioRender (SoAudioRenderAction *action)

virtual SoChildList *	getChildren (void) const

virtual void	addWriteReference (SoOutput *out, SbBool isfromfield=FALSE)

Public Member Functions inherited from SoNode
void	setOverride (const SbBool state)

SbBool	isOverride (void) const

void	setNodeType (const NodeType type)

NodeType	getNodeType (void) const

virtual SoNode *	copy (SbBool copyconnections=FALSE) const

virtual SbBool	affectsState (void) const

virtual void	GLRenderBelowPath (SoGLRenderAction *action)

virtual void	GLRenderInPath (SoGLRenderAction *action)

virtual void	GLRenderOffPath (SoGLRenderAction *action)

virtual void	rayPick (SoRayPickAction *action)

virtual void	grabEventsSetup (void)

virtual void	grabEventsCleanup (void)

virtual void	startNotify (void)

virtual void	notify (SoNotList *l)

SbUniqueId	getNodeId (void) const

virtual void	writeInstance (SoOutput *out)

virtual SoNode *	addToCopyDict (void) const

virtual SoFieldContainer *	copyThroughConnection (void) const

Public Member Functions inherited from SoFieldContainer
void	setToDefaults (void)

SbBool	hasDefaultValues (void) const

SbBool	fieldsAreEqual (const SoFieldContainer *container) const

void	copyFieldValues (const SoFieldContainer *container, SbBool copyconnections=FALSE)

SbBool	set (const char *const fielddata)

void	get (SbString &fielddata)

virtual int	getFields (SoFieldList &l) const

virtual int	getAllFields (SoFieldList &l) const

virtual SoField *	getField (const SbName &name) const

virtual SoField *	getEventIn (const SbName &name) const

virtual SoField *	getEventOut (const SbName &name) const

SbBool	getFieldName (const SoField *const field, SbName &name) const

SbBool	enableNotify (const SbBool flag)

SbBool	isNotifyEnabled (void) const

SbBool	set (const char fielddata, SoInput input)

void	get (SbString &fielddata, SoOutput *out)

virtual SbBool	validateNewFieldValue (SoField field, void newval)

SbBool	getIsBuiltIn (void) const

virtual void	getFieldsMemorySize (size_t &managed, size_t &unmanaged) const

void	setUserData (void *userdata) const

void *	getUserData (void) const

Public Member Functions inherited from SoBase
void	ref (void) const

void	unref (void) const

void	unrefNoDelete (void) const

int32_t	getRefCount (void) const

void	touch (void)

SbBool	isOfType (SoType type) const
	Returns `TRUE` if the type of this object is either of the same type or inherited from type. More...

virtual SbName	getName (void) const

virtual void	setName (const SbName &newname)

void	addAuditor (void *const auditor, const SoNotRec::Type type)

void	removeAuditor (void *const auditor, const SoNotRec::Type type)

const SoAuditorList &	getAuditors (void) const

SbBool	shouldWrite (void)

void	assertAlive (void) const

Static Public Member Functions
static SoType	getClassTypeId (void)

static void	initClass (void)

Static Public Member Functions inherited from SoNode
static uint32_t	getCompatibilityTypes (const SoType &nodetype)

static SoType	getClassTypeId (void)

static SoNode *	getByName (const SbName &name)

static int	getByName (const SbName &name, SoNodeList &l)

static void	initClass (void)

static void	initClasses (void)

static SbUniqueId	getNextNodeId (void)

static int	getActionMethodIndex (const SoType type)

static void	getBoundingBoxS (SoAction action, SoNode node)

static void	GLRenderS (SoAction action, SoNode node)

static void	callbackS (SoAction action, SoNode node)

static void	getMatrixS (SoAction action, SoNode node)

static void	handleEventS (SoAction action, SoNode node)

static void	pickS (SoAction action, SoNode node)

static void	rayPickS (SoAction action, SoNode node)

static void	searchS (SoAction action, SoNode node)

static void	writeS (SoAction action, SoNode node)

static void	audioRenderS (SoAction action, SoNode node)

static void	getPrimitiveCountS (SoAction action, SoNode node)

Static Public Member Functions inherited from SoFieldContainer
static void	initClass (void)

static SoType	getClassTypeId (void)

static void	cleanupClass (void)

static void	initCopyDict (void)

static void	addCopy (const SoFieldContainer orig, const SoFieldContainer copy)

static SoFieldContainer *	checkCopy (const SoFieldContainer *orig)

static SoFieldContainer *	findCopy (const SoFieldContainer *orig, const SbBool copyconnections)

static void	copyDone (void)

Static Public Member Functions inherited from SoBase
static void	initClass (void)
	Sets up initialization for data common to all instances of this class, like submitting necessary information to the Coin type system.

static SoType	getClassTypeId (void)
	This static method returns the SoType object associated with objects of this class.

static void	addName (SoBase const base, const char const name)

static void	removeName (SoBase const base, const char const name)

static void	incrementCurrentWriteCounter (void)

static void	decrementCurrentWriteCounter (void)

static SoBase *	getNamedBase (const SbName &name, SoType type)

static int	getNamedBases (const SbName &name, SoBaseList &baselist, SoType type)

static SbBool	read (SoInput input, SoBase &base, SoType expectedtype)

static void	setInstancePrefix (const SbString &c)

static void	setTraceRefs (SbBool trace)

static SbBool	getTraceRefs (void)

static SbBool	connectRoute (SoInput *input, const SbName &fromnodename, const SbName &fromfieldname, const SbName &tonodename, const SbName &tofieldname)

static SbBool	readRoute (SoInput *input)

Protected Member Functions
virtual const SoFieldData *	getFieldData (void) const

virtual	~SoGroup ()

virtual SbBool	readInstance (SoInput *in, unsigned short flags)

virtual SbBool	readChildren (SoInput *in)

virtual void	copyContents (const SoFieldContainer *from, SbBool copyconnections)

virtual SoNotRec	createNotRec (void)

void	setOperation (const SoNotRec::OperationType opType=SoNotRec::UNSPECIFIED, const SoNode cc=NULL, const SoNode pc=NULL, const int ci=-1)

Protected Member Functions inherited from SoNode
	SoNode (void)

virtual	~SoNode ()

Protected Member Functions inherited from SoFieldContainer
	SoFieldContainer (void)

virtual	~SoFieldContainer ()

Protected Member Functions inherited from SoBase
	SoBase (void)

virtual	~SoBase ()

virtual void	destroy (void)

SbBool	hasMultipleWriteRefs (void) const

SbBool	writeHeader (SoOutput *out, SbBool isgroup, SbBool isengine) const

void	writeFooter (SoOutput *out) const

virtual const char *	getFileFormatName (void) const

Static Protected Member Functions
static const SoFieldData **	getFieldDataPtr (void)

Static Protected Member Functions inherited from SoNode
static const SoFieldData **	getFieldDataPtr (void)

static void	setNextActionMethodIndex (int index)

static int	getNextActionMethodIndex (void)

static void	incNextActionMethodIndex (void)

static void	setCompatibilityTypes (const SoType &nodetype, const uint32_t bitmask)

Static Protected Member Functions inherited from SoBase
static uint32_t	getCurrentWriteCounter (void)

static void	staticDataLock (void)

static void	staticDataUnlock (void)

Protected Attributes
SoChildList *	children

Protected Attributes inherited from SoNode
SbUniqueId	uniqueId

Protected Attributes inherited from SoFieldContainer
SbBool	isBuiltIn

Additional Inherited Members
Public Types inherited from SoNode
enum	NodeType { INVENTOR = 0x0000, VRML1 = 0x0001, VRML2 = 0x0002, INVENTOR_1 = 0x0004, INVENTOR_2_0 = 0x0008, INVENTOR_2_1 = 0x0010, INVENTOR_2_5 = 0x0020, INVENTOR_2_6 = 0x0040, COIN_1_0 = 0x0080, COIN_2_0 = 0x0100, EXTENSION = 0x0200, COIN_2_2 = 0x0400, COIN_2_3 = 0x0800, COIN_2_4 = 0x1000, INVENTOR_5_0 = 0x2000, COIN_2_5 = 0x4000, COIN_3_0 = 0x8000, INVENTOR_6_0 = 0x10000, COIN_4_0 = 0x20000 }

Protected Types inherited from SoBase
enum	BaseFlags { IS_ENGINE = 0x01, IS_GROUP = 0x02 }

Static Protected Attributes inherited from SoNode
static SbUniqueId	nextUniqueId = 1

static int	nextActionMethodIndex = 0

Detailed Description

The SoGroup class is a node which managed other node instances.

The internal scene data structures in Coin are managed as directed graphs. The graphs are built by setting up a hierarchy through the use of group nodes (either of this type, or from subclasses like SoSeparator) which is then traversed when applying actions (like SoGLRenderAction) to it.

SoGroup, SoSeparator, and other classes derived from SoGroup, are the "tools" the application programmer uses when making the layout of the scene graph.

An often asked question about SoGroup nodes is: "Why is there no SoGroup::getParent() method?" The answer to this is that nodes in the scene graph can have multiple parents, so a simple getParent() method wouldn't work. If you have a node pointer (or other node identification) of a node that you want to remove from the scene graph, what you need to do is to use an SoSearchAction to find all paths down to the node, and then invoke SoGroup::removeChild() from all found parents of the node.

The function would look something like this:

void getParents(SoNode * node, SoNode * root, SoPathList & parents)
{
  SoSearchAction sa;
  sa.setNode(node);
  sa.setInterest(SoSearchAction::ALL);
  sa.apply(root);
  parents = sa.getPaths();
}

Or if you know that your node of interest has only a single parent:

SoGroup * getParent(SoNode * node, SoNode * root)
{
  SoSearchAction sa;
  sa.setNode(node);
  sa.setInterest(SoSearchAction::FIRST);
  sa.apply(root);
  SoPath * p = sa.getPath();
  assert(p && "not found");
  if (p->getLength() < 2) { return NULL; } // no parent
  return (SoGroup *)p->getNodeFromTail(1);
}

An important note about a potential problem using SoGroup nodes which it is not common to stumble on, but which makes hard to find bugs when one does: you should not change the scene graph layout during any action traversal, as that is not allowed by the internal Coin code. I.e. do not use addChild(), removeChild(), insertChild() or replaceChild() from any callback that is triggered directly or indirectly from an action traversal. The most common way of getting hit by this error, would be something like the following (simplified) example:

#include <Inventor/Qt/SoQt.h>
#include <Inventor/Qt/viewers/SoQtExaminerViewer.h>
#include <Inventor/nodes/SoEventCallback.h>
#include <Inventor/nodes/SoSeparator.h>
#include <Inventor/nodes/SoCone.h>
#include <Inventor/manips/SoPointLightManip.h>
#include <Inventor/events/SoMouseButtonEvent.h>
SoPointLightManip * global_pointlightmanip;
SoSeparator * global_root;
// Remove pointlight when clicking right mouse button.
static void
mySelectionC(void * ud, SoEventCallback * n)
{
  const SoMouseButtonEvent * mbe = (SoMouseButtonEvent*) n->getEvent();
  if ((mbe->getButton() == SoMouseButtonEvent::BUTTON2) &&
      (mbe->getState() == SoButtonEvent::DOWN)) {
    if (global_pointlightmanip) {
      global_root->removeChild(global_pointlightmanip);
      global_pointlightmanip = NULL;
    }
  }
}
int
main(int argc, char ** argv)
{
  QWidget * window = SoQt::init(argv[0]);
  global_root = new SoSeparator;
  global_root->ref();
  SoEventCallback * ecb = new SoEventCallback;
  ecb->addEventCallback(SoMouseButtonEvent::getClassTypeId(), mySelectionC, 0);
  global_root->addChild(ecb);
  global_root->addChild(new SoCone);
  global_pointlightmanip = new SoPointLightManip;
  global_root->addChild(global_pointlightmanip);
  SoQtExaminerViewer * viewer = new SoQtExaminerViewer(window);
  viewer->setSceneGraph(global_root);
  viewer->show();
  SoQt::show(window);
  SoQt::mainLoop();
  global_root->unref();
  delete viewer;
  return 0;
}

What happens in the above case is this: when clicking with the right mouse button, the SoQtExaminerViewer converts the Qt event to a Coin event, which is sent down the scene graph with an SoHandleEventAction. The action traversal reaches the "global_root" SoSeparator node, where it sees that it should further traverse 3 child nodes (first the SoEventCallback, then the SoCone, then the SoPointLightManip). When it then traverses the SoEventCallback, the mySelectionC() callback will be invoked, which removes the last child. But the SoHandleEventAction will still continue it's traversal as if the global_root node has 3 children – and the code will crash.

(This exact example would perhaps be straight-forward to handle internally in Coin, but there are other ways to change the scene graph layout that are very difficult to handle properly. So in general, changing layout during action traversal is not allowed.)

What to do in these cases is to change the code inside the callback to not do any operations that immediately changes the layout of the scene graph, but to delay it for after the traversal is done. This can e.g. be done by using a Coin sensor.

FILE FORMAT/DEFAULTS:

Group {

}

Constructor & Destructor Documentation

◆ SoGroup() [1/2]

SoGroup::SoGroup ( void )

Default constructor.

◆ SoGroup() [2/2]

SoGroup::SoGroup ( int nchildren )

Constructor.

The argument should be the approximate number of children which is expected to be inserted below this node. The number need not be exact, as it is only used as a hint for better memory resource allocation.

◆ ~SoGroup()

SoGroup::~SoGroup ( )

protectedvirtual

Destructor.

Member Function Documentation

◆ getTypeId()

SoType SoGroup::getTypeId ( void ) const

virtual

Returns the type identification of an object derived from a class inheriting SoBase. This is used for run-time type checking and "downward" casting.

Usage example:

void foo(SoNode * node)
{
  if (node->getTypeId() == SoFile::getClassTypeId()) {
    SoFile * filenode = (SoFile *)node;  // safe downward cast, knows the type
  }
}

For application programmers wanting to extend the library with new nodes, engines, nodekits, draggers or others: this method needs to be overridden in all subclasses. This is typically done as part of setting up the full type system for extension classes, which is usually accomplished by using the pre-defined macros available through for instance Inventor/nodes/SoSubNode.h (SO_NODE_INIT_CLASS and SO_NODE_CONSTRUCTOR for node classes), Inventor/engines/SoSubEngine.h (for engine classes) and so on.

For more information on writing Coin extensions, see the class documentation of the toplevel superclasses for the various class groups.

Implements SoBase.

Reimplemented in SoExtSelection, SoVRMLSwitch, SoSelection, SoWWWAnchor, SoVRMLAnchor, SoGeoSeparator, SoSwitch, SoVRMLBillboard, SoShadowGroup, SoVRMLCollision, SoVRMLGroup, SoVRMLLOD, SoLocateHighlight, SoSeparator, SoVRMLParent, SoBlinker, SoLOD, SoArray, SoLevelOfDetail, SoVRMLTransform, SoMultipleCopy, SoPathSwitch, SoAnnotation, and SoTransformSeparator.

◆ getFieldData()

const SoFieldData * SoGroup::getFieldData ( void ) const

protectedvirtual

Returns a pointer to the class-wide field data storage object for this instance. If no fields are present, returns NULL.

Reimplemented from SoFieldContainer.

Reimplemented in SoExtSelection, SoVRMLSwitch, SoSelection, SoWWWAnchor, SoVRMLAnchor, SoGeoSeparator, SoSwitch, SoVRMLBillboard, SoShadowGroup, SoVRMLCollision, SoVRMLGroup, SoVRMLLOD, SoLocateHighlight, SoSeparator, SoVRMLParent, SoBlinker, SoLOD, SoArray, SoLevelOfDetail, SoVRMLTransform, SoMultipleCopy, SoPathSwitch, SoAnnotation, and SoTransformSeparator.

◆ addChild()

void SoGroup::addChild ( SoNode * node )

virtual

Append a child node to the list of children nodes this group node is managing.

Please note that this method is not virtual in the original SGI Inventor API.

Reimplemented in SoVRMLSwitch, SoVRMLLOD, and SoVRMLParent.

◆ insertChild()

void SoGroup::insertChild	(	SoNode *	child,
		int	newchildindex
	)

virtual

Insert a child node at position newchildindex.

newchildindex must be <= this->getNumChildren()

Please note that this method is not virtual in the original SGI Inventor API.

Reimplemented in SoVRMLSwitch, SoVRMLLOD, and SoVRMLParent.

◆ getChild()

SoNode * SoGroup::getChild ( int index ) const

virtual

Returns pointer to child node at index.

Please note that this method is not virtual in the original SGI Inventor API.

Reimplemented in SoVRMLSwitch, SoVRMLLOD, and SoVRMLParent.

◆ findChild()

int SoGroup::findChild ( const SoNode * node ) const

virtual

Returns index in our list of children for child node, or -1 if node is not a child of this group node.

Please note that this method is not virtual in the original SGI Inventor API.

Reimplemented in SoVRMLSwitch, SoVRMLLOD, and SoVRMLParent.

◆ getNumChildren()

int SoGroup::getNumChildren ( void ) const

virtual

Returns number of child nodes managed by this group.

Please note that this method is not virtual in the original SGI Inventor API.

Reimplemented in SoVRMLSwitch, SoVRMLLOD, and SoVRMLParent.

◆ removeChild() [1/2]

void SoGroup::removeChild ( int childindex )

virtual

Remove node at childindex in our list of children.

Please note that this method is not virtual in the original SGI Inventor API.

Reimplemented in SoVRMLSwitch, SoVRMLLOD, and SoVRMLParent.

◆ removeChild() [2/2]

void SoGroup::removeChild ( SoNode * child )

virtual

Remove child from the set of children managed by this group node. Will decrease the reference count of child by 1.

This is a convenience method. It will simply call findChild() with child as argument, and then call removeChild(int) if the child is found.

Please note that this method is not virtual in the original SGI Inventor API.

Reimplemented in SoVRMLSwitch, SoVRMLLOD, and SoVRMLParent.

◆ removeAllChildren()

void SoGroup::removeAllChildren ( void )

virtual

Do not manage the children anymore. Will dereference all children by 1 as they are removed.

Please note that this method is not virtual in the original SGI Inventor API.

Reimplemented in SoVRMLSwitch, SoVRMLLOD, and SoVRMLParent.

◆ replaceChild() [1/2]

void SoGroup::replaceChild	(	int	index,
		SoNode *	newchild
	)

virtual

Replace child at index with newChild.

Dereferences the child previously at index, and increases the reference count of newChild by 1.

index must be < this->getNumChildren()

Please note that this method is not virtual in the original SGI Inventor API.

Reimplemented in SoVRMLSwitch, SoVRMLLOD, and SoVRMLParent.

◆ replaceChild() [2/2]

void SoGroup::replaceChild	(	SoNode *	oldchild,
		SoNode *	newchild
	)

virtual

Replace oldchild with newchild.

Dereferences oldchild by 1, and increases the reference count of newchild by 1.

This is a convenience method. It will simply call findChild() with oldchild as argument, and call replaceChild(int, SoNode*) if the child is found.

Please note that this method is not virtual in the original SGI Inventor API.

Reimplemented in SoVRMLSwitch, SoVRMLLOD, and SoVRMLParent.

◆ doAction()

void SoGroup::doAction ( SoAction * action )

virtual

This function performs the typical operation of a node for any action.

Reimplemented from SoNode.

Reimplemented in SoVRMLSwitch, SoVRMLTransform, SoVRMLLOD, SoVRMLGroup, SoVRMLParent, SoArray, SoSeparator, SoSwitch, SoVRMLBillboard, SoLOD, SoLevelOfDetail, SoMultipleCopy, SoPathSwitch, and SoTransformSeparator.

◆ GLRender()

void SoGroup::GLRender ( SoGLRenderAction * action )

virtual

Action method for the SoGLRenderAction.

This is called during rendering traversals. Nodes influencing the rendering state in any way or who wants to throw geometry primitives at OpenGL overrides this method.

Reimplemented from SoNode.

Reimplemented in SoVRMLSwitch, SoVRMLLOD, SoVRMLGroup, SoArray, SoSeparator, SoSwitch, SoVRMLBillboard, SoLOD, SoVRMLCollision, SoLevelOfDetail, SoMultipleCopy, SoPathSwitch, SoTransformSeparator, and SoAnnotation.

◆ callback()

void SoGroup::callback ( SoCallbackAction * action )

virtual

Action method for SoCallbackAction.

Simply updates the state according to how the node behaves for the render action, so the application programmer can use the SoCallbackAction for extracting information about the scene graph.

Reimplemented from SoNode.

Reimplemented in SoVRMLSwitch, SoVRMLTransform, SoVRMLLOD, SoVRMLGroup, SoSeparator, SoArray, SoSwitch, SoVRMLBillboard, SoPathSwitch, SoGeoSeparator, SoLOD, SoLevelOfDetail, SoMultipleCopy, and SoTransformSeparator.

◆ getBoundingBox()

void SoGroup::getBoundingBox ( SoGetBoundingBoxAction * action )

virtual

Action method for the SoGetBoundingBoxAction.

Calculates bounding box and center coordinates for node and modifies the values of the action to encompass the bounding box for this node and to shift the center point for the scene more towards the one for this node.

Nodes influencing how geometry nodes calculates their bounding box also overrides this method to change the relevant state variables.

Reimplemented from SoNode.

Reimplemented in SoVRMLSwitch, SoVRMLLOD, SoVRMLTransform, SoVRMLGroup, SoArray, SoSeparator, SoLOD, SoSwitch, SoVRMLBillboard, SoGeoSeparator, SoLevelOfDetail, SoMultipleCopy, SoPathSwitch, SoBlinker, and SoTransformSeparator.

◆ getMatrix()

void SoGroup::getMatrix ( SoGetMatrixAction * action )

virtual

Action method for SoGetMatrixAction.

Updates action by accumulating with the transformation matrix of this node (if any).

Reimplemented from SoNode.

Reimplemented in SoVRMLSwitch, SoVRMLTransform, SoVRMLGroup, SoArray, SoSeparator, SoSwitch, SoVRMLBillboard, SoGeoSeparator, SoMultipleCopy, SoPathSwitch, and SoTransformSeparator.

◆ handleEvent()

void SoGroup::handleEvent ( SoHandleEventAction * action )

virtual

Action method for SoHandleEventAction.

Inspects the event data from action, and processes it if it is something which this node should react to.

Nodes influencing relevant state variables for how event handling is done also overrides this method.

Reimplemented from SoNode.

Reimplemented in SoExtSelection, SoSelection, SoVRMLSwitch, SoSeparator, SoArray, SoWWWAnchor, SoVRMLAnchor, SoLocateHighlight, SoSwitch, SoMultipleCopy, and SoPathSwitch.

◆ pick()

void SoGroup::pick ( SoPickAction * action )

virtual

Action method for SoPickAction.

Does common processing for SoPickAction action instances.

Reimplemented from SoNode.

Reimplemented in SoVRMLSwitch, SoArray, SoVRMLBillboard, SoSwitch, SoMultipleCopy, SoPathSwitch, and SoTransformSeparator.

◆ search()

void SoGroup::search ( SoSearchAction * action )

virtual

Action method for SoSearchAction.

Compares the search criteria from the action to see if this node is a match. Searching is done by matching up all criteria set up in the SoSearchAction – if any of the requested criteria is a miss, the search is not deemed successful for the node.

See also: SoSearchAction

Reimplemented from SoNode.

Reimplemented in SoVRMLSwitch, SoVRMLGroup, SoVRMLLOD, SoSeparator, SoArray, SoVRMLParent, SoSwitch, SoVRMLBillboard, SoMultipleCopy, and SoPathSwitch.

◆ write()

void SoGroup::write ( SoWriteAction * action )

virtual

Action method for SoWriteAction.

Writes out a node object, and any connected nodes, engines etc, if necessary.

Reimplemented from SoNode.

Reimplemented in SoVRMLSwitch, SoVRMLGroup, SoVRMLLOD, SoVRMLParent, SoSwitch, and SoBlinker.

◆ getPrimitiveCount()

void SoGroup::getPrimitiveCount ( SoGetPrimitiveCountAction * action )

virtual

Action method for the SoGetPrimitiveCountAction.

Calculates the number of triangle, line segment and point primitives for the node and adds these to the counters of the action.

Nodes influencing how geometry nodes calculates their primitive count also overrides this method to change the relevant state variables.

Reimplemented from SoNode.

Reimplemented in SoVRMLGroup, SoVRMLLOD, SoVRMLTransform, SoSeparator, SoArray, SoVRMLParent, SoSwitch, SoLOD, SoGeoSeparator, SoMultipleCopy, SoPathSwitch, and SoTransformSeparator.

◆ audioRender()

void SoGroup::audioRender ( SoAudioRenderAction * action )

virtual

Action method for SoAudioRenderAction.

Does common processing for SoAudioRenderAction action instances.

Reimplemented from SoNode.

Reimplemented in SoVRMLSwitch, SoVRMLGroup, SoVRMLLOD, SoVRMLTransform, SoSeparator, SoArray, SoSwitch, SoLOD, SoMultipleCopy, SoPathSwitch, SoLevelOfDetail, and SoTransformSeparator.

◆ getChildren()

SoChildList * SoGroup::getChildren ( void ) const

virtual

Returns list of children.

Reimplemented from SoNode.

Reimplemented in SoVRMLSwitch, SoVRMLLOD, and SoVRMLParent.

◆ addWriteReference()

void SoGroup::addWriteReference	(	SoOutput *	out,
		SbBool	isfromfield = `FALSE`
	)

virtual

This method is used during the first write pass of a write action to count the number of references to this object in the scene graph.

Reimplemented from SoFieldContainer.

◆ readInstance()

SbBool SoGroup::readInstance	(	SoInput *	in,
		unsigned short	flags
	)

protectedvirtual

This method is mainly intended for internal use during file import operations.

It reads a definition of an instance from the input stream in. The input stream state points to the start of a serialized / persistant representation of an instance of this class type.

TRUE or FALSE is returned, depending on if the instantiation and configuration of the new object of this class type went ok or not. The import process should be robust and handle corrupted input streams by returning FALSE.

flags is used internally during binary import when reading user extension nodes, group nodes or engines.

Reimplemented from SoNode.

Reimplemented in SoVRMLSwitch, SoVRMLLOD, SoSeparator, and SoVRMLParent.

◆ readChildren()

SbBool SoGroup::readChildren ( SoInput * in )

protectedvirtual

Read all children of this node from in and attach them below this group in left-to-right order. Returns FALSE upon read error.

◆ copyContents()

void SoGroup::copyContents	(	const SoFieldContainer *	from,
		SbBool	copyconnections
	)

protectedvirtual

Makes a deep copy of all data of from into this instance, except external scenegraph references if copyconnections is FALSE.

This is the method that should be overridden by extension node / engine / dragger / whatever subclasses which needs to account for internal data that are not handled automatically.

For copying nodes from application code, you should not invoke this function directly, but rather call the SoNode::copy() function:

SoNode * mynewnode = templatenode->copy();

The same also goes for engines.

Make sure that when you override the copyContents() method in your extension class that you also make it call upwards to it's parent superclass in the inheritance hierarchy, as copyContents() in for instance SoNode and SoFieldContainer does important work. It should go something like this:

void
MyCoinExtensionNode::copyContents(const SoFieldContainer * from,
                                  SbBool copyconnections)
{
  // let parent superclasses do their thing (copy fields, copy
  // instance name, etc etc)
  SoNode::copyContents(from, copyconnections);
  // [..then copy internal data..]
}

Reimplemented from SoNode.

Reimplemented in SoVRMLSwitch, SoVRMLLOD, and SoVRMLParent.

Member Data Documentation

◆ children

SoChildList * SoGroup::children

protected

List of managed child nodes.

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

SoGroup.h
SoGroup.cpp

Public Member Functions

Static Public Member Functions

Protected Member Functions

Static Protected Member Functions

Protected Attributes

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ SoGroup() [1/2]

◆ SoGroup() [2/2]

◆ ~SoGroup()

Member Function Documentation

◆ getTypeId()

◆ getFieldData()

◆ addChild()

◆ insertChild()

◆ getChild()

◆ findChild()

◆ getNumChildren()

◆ removeChild() [1/2]

◆ removeChild() [2/2]

◆ removeAllChildren()

◆ replaceChild() [1/2]

◆ replaceChild() [2/2]

◆ doAction()

◆ GLRender()

◆ callback()

◆ getBoundingBox()

◆ getMatrix()

◆ handleEvent()

◆ pick()

◆ search()

◆ write()

◆ getPrimitiveCount()

◆ audioRender()

◆ getChildren()

◆ addWriteReference()

◆ readInstance()

◆ readChildren()

◆ copyContents()

Member Data Documentation

◆ children