# SoVRMLParent Class Reference

`#include <Inventor/VRMLnodes/SoVRMLParent.h>`

Inheritance diagram for SoVRMLParent:

List of all members.

## Detailed Description

The SoVRMLParent node is a superclass for all VRML grouping nodes.

## Public Member Functions

virtual SbBool | affectsState (void) const
virtual void | addChild (SoNode *child)
virtual void | insertChild (SoNode *child, int idx)
virtual SoNode * | getChild (int idx) const
virtual int | findChild (const SoNode *child) const
virtual int | getNumChildren (void) const
virtual void | removeChild (int idx)
virtual void | removeChild (SoNode *child)
virtual void | removeAllChildren (void)
virtual void | replaceChild (int idx, SoNode *child)
virtual void | replaceChild (SoNode *old, SoNode *child)
virtual SoChildList * | getChildren (void) const
virtual void | doAction (SoAction *action)
virtual void | search (SoSearchAction *action)
virtual void | write (SoWriteAction *action)
virtual void | getPrimitiveCount (SoGetPrimitiveCountAction *action)

## Static Public Member Functions

void | initClass (void)
void | updateChildList (const SoNode *const *nodes, const int numnodes, SoChildList &cl)
void | updateChildList (SoNode *nodewithsfnode, SoChildList &cl)

## Public Attributes

SoMFNode | children

## Protected Member Functions

| SoVRMLParent (void)
| SoVRMLParent (int approxchildren)
virtual | ~SoVRMLParent ()
virtual void | notify (SoNotList *list)
virtual SbBool | readInstance (SoInput *in, unsigned short flags)
virtual void | copyContents (const SoFieldContainer *from, SbBool copyConn)

## Protected Attributes

SoMFNode | addChildren
SoMFNode | removeChildren

## Constructor & Destructor Documentation

SoVRMLParent::SoVRMLParent | ( | void |  | ) | `[protected]`

| Constructor.

SoVRMLParent::SoVRMLParent | ( | int | numchildren | ) | `[protected]`

| Destructor. numchildren is the expected number of children.

SoVRMLParent::~SoVRMLParent | ( |  | ) | `[protected, virtual]`

| Destructor.

## Member Function Documentation

void SoVRMLParent::initClass | ( | void |  | ) | `[static]`

| Sets up initialization for data common to all instances of this class, like submitting necessary information to the Coin type system. Reimplemented from SoGroup. Reimplemented in SoVRMLAnchor, SoVRMLBillboard, SoVRMLCollision, SoVRMLGroup, and SoVRMLTransform.

SbBool SoVRMLParent::affectsState | ( | void |  | ) | const`[virtual]`

Returns `TRUE` if the node could have any effect on the state during traversal.

If it returns `FALSE`, no data in the traversal-state will change from the pre-traversal state to the post-traversal state. The SoSeparator node will for instance return `FALSE`, as it pushes and pops the state before and after traversal of its children. All SoShape nodes will also return `FALSE`, as just pushing out geometry data to the rendering engine won't affect the actual rendering state.

The default method returns `TRUE`, on a "better safe than sorry" philosophy.

Reimplemented from SoNode.

void SoVRMLParent::addChild | ( | SoNode * | child | ) | `[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 from SoGroup.

void SoVRMLParent::insertChild | ( | SoNode * | child,
|  | int | idx
| ) | `[virtual]`

| Insert a child node at position newchildindex. Please note that this method is not virtual in the original SGI Inventor API. Reimplemented from SoGroup.

SoNode * SoVRMLParent::getChild | ( | int | idx | ) | const`[virtual]`

| Returns pointer to child node at index. Please note that this method is not virtual in the original SGI Inventor API. Reimplemented from SoGroup.

int SoVRMLParent::findChild | ( | const SoNode * | child | ) | 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 from SoGroup.

int SoVRMLParent::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 from SoGroup.

void SoVRMLParent::removeChild | ( | int | idx | ) | `[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 from SoGroup.

void SoVRMLParent::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 from SoGroup.

void SoVRMLParent::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 from SoGroup.

void SoVRMLParent::replaceChild | ( | int | idx,
|  | SoNode * | child
| ) | `[virtual]`

| Replace child at index with newChild. Dereferences the child previously at index, and increases the reference count of newChild by 1. Please note that this method is not virtual in the original SGI Inventor API. Reimplemented from SoGroup.

void SoVRMLParent::replaceChild | ( | SoNode * | old,
|  | SoNode * | child
| ) | `[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 from SoGroup.

SoChildList * SoVRMLParent::getChildren | ( | void |  | ) | const`[virtual]`

| Returns list of children. Reimplemented from SoGroup.

void SoVRMLParent::doAction | ( | SoAction * | action | ) | `[virtual]`

| This function performs the typical operation of a node for any action. Reimplemented from SoGroup. Reimplemented in SoVRMLBillboard, SoVRMLGroup, and SoVRMLTransform.

void SoVRMLParent::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 SoGroup.

Reimplemented in SoVRMLBillboard, and SoVRMLGroup.

void SoVRMLParent::write | ( | SoWriteAction * | action | ) | `[virtual]`

| Action method for SoWriteAction. Writes out a node object, and any connected nodes, engines etc, if necessary. Reimplemented from SoGroup. Reimplemented in SoVRMLGroup.

void SoVRMLParent::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 SoGroup. Reimplemented in SoVRMLGroup, and SoVRMLTransform.

void SoVRMLParent::updateChildList | ( | const SoNode *const * | nodes,
|  | const int | numnodes,
|  | SoChildList & | cl
| ) | `[static]`

| A convenience method that can be used to update cl to match the list of nodes in nodes.

void SoVRMLParent::updateChildList | ( | SoNode * | nodewithsfnode,
|  | SoChildList & | cl
| ) | `[static]`

| A convenience method that is used to sync the nodes in cl with all nodes in SoSFNode fields in nodewithsfnode.

void SoVRMLParent::notify | ( | SoNotList * | list | ) | `[protected, virtual]`

| Notifies all auditors for this instance when changes are made. Reimplemented from SoNode. Reimplemented in SoVRMLBillboard, SoVRMLCollision, SoVRMLGroup, and SoVRMLTransform.

SbBool SoVRMLParent::readInstance | ( | SoInput * | in,
|  | unsigned short | flags
| ) | `[protected, virtual]`

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 SoGroup.

void SoVRMLParent::copyContents | ( | const SoFieldContainer * | from,
|  | SbBool | copyConn
| ) | `[protected, virtual]`

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

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

Note that for simply copying e.g. a node from application code, it should be sufficient to do:

      SoNode * mynewnode = templatenode->copy();

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 SoGroup.

## Member Data Documentation

SoMFNode SoVRMLParent::children

| The children nodes. Reimplemented from SoGroup.

SoMFNode SoVRMLParent::addChildren `[protected]`

| An event in that is used to add children to this node.

SoMFNode SoVRMLParent::removeChildren `[protected]`

| An event in that is used to remove children from this node.

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

- SoVRMLParent.h
- Parent.cpp