Base class for all group nodes. More...

#include <Inventor/nodes/SoGroup.h>

Inheritance diagram for SoGroup:

Public Member Functions
	SoGroup ()
	Creates an empty group node.
	SoGroup (int nChildren)
	Constructor that takes approximate number of children.
void	addChild (SoNode *child)
	Adds a child as last one in group.
void	insertChild (SoNode *child, int newChildIndex)
	Adds a child so that it becomes the one with the given index.
SoNode *	getChild (int index) const
	Returns pointer to child node with the given index.
int	findChild (const SoNode *child) const
	Finds index of given child within group. Returns -1 if not found.
int	getNumChildren () const
	Returns number of children.
void	removeChild (int index)
	Removes child with given index from group.
void	removeChild (SoNode *child)
	Removes first instance of given child from group.
void	removeAllChildren ()
	Removes all children from group.
void	replaceChild (int index, SoNode *newChild)
	Replaces child with given index with new child.
void	replaceChild (SoNode oldChild, SoNode newChild)
	Replaces first instance of given child with new child.
virtual void	doAction (SoAction *action)
	Implement actions.
virtual void	callback (SoCallbackAction *action)
virtual void	GLRender (SoGLRenderAction *action)
	These virtual functions implement all of the actions for nodes, Most of the default implementations do nothing.
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 SoChildList *	getChildren () const
	Returns pointer to children.
Static Public Member Functions
static void	initClass ()
	Initializes base node class.
Protected Member Functions
virtual SbBool	readInstance (SoInput *in, unsigned short flags)
	Reads stuff into instance of SoGroup. Returns FALSE on error.
virtual SbBool	readChildren (SoInput *in)
	Reads just the children into instance of SoGroup. Returns FALSE on error.
virtual	~SoGroup ()
virtual void	copyContents (const SoFieldContainer *fromFC, SbBool copyConnections)
	Copies the contents of the given node into this instance.
Protected Attributes
SoChildList *	children

Detailed Description

This node defines the base class for all group nodes. SoGroup is a node that contains an ordered list of child nodes. The ordering of the child nodes represents the traversal order for all operations (for example, rendering, picking, and so on). This node is simply a container for the child nodes and does not alter the traversal state in any way. During traversal, state accumulated for a child is passed on to each successive child and then to the parents of the group (SoGroup does not push or pop traversal state as SoSeparator does).

File Format/Default

Group {
}

Action Behavior

: SoGLRenderAction, SoCallbackAction, SoGetBoundingBoxAction, SoHandleEventAction, SoRayPickAction
Traverses each child in order.

: SoGetMatrixAction
Does nothing unless the group is in the middle of the path chain the action is being applied to. If so, the children up to and including the next node in the chain are traversed.

: SoSearchAction
If searching for group nodes, compares with this group. Otherwise, continues to search children.

: SoWriteAction
Writes out the group node. This method also deals with any field data associated with the group node. As a result, this method is used for most subclasses of SoGroup as well.