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SoGroup Class Reference
[Nodes]

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

#include <Inventor/nodes/SoGroup.h>

Inheritance diagram for SoGroup:

SoNode SoFieldContainer SoBase SoArray SoLevelOfDetail SoLOD SoMultipleCopy SoPathSwitch SoSeparator SoSwitch SoTransformSeparator SoVRMLLOD SoVRMLParent SoVRMLSwitch List of all members.

Public Methods

 SoGroup (void)
 SoGroup (int nchildren)
virtual void addChild (SoNode *node)
virtual void insertChild (SoNode *child, int newchildindex)
virtual SoNodegetChild (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 SoChildListgetChildren (void) const

Static Public Methods

void initClass (void)

Protected Methods

virtual ~SoGroup ()
virtual SbBool readInstance (SoInput *in, unsigned short flags)
virtual SbBool readChildren (SoInput *in)
virtual void copyContents (const SoFieldContainer *from, SbBool copyconnections)

Protected Attributes

SoChildListchildren

Detailed Description

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

The internal scene datastructures in Coin is 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.


Constructor & Destructor Documentation

SoGroup::SoGroup void   
 

Default constructor.

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   [protected, virtual]
 

Destructor.


Member Function Documentation

void SoGroup::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 SoNode.

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

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 SoVRMLLOD, SoVRMLParent, and SoVRMLSwitch.

void SoGroup::insertChild SoNode   child,
int    newchildindex
[virtual]
 

Insert a child node at position newchildindex.

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

Reimplemented in SoVRMLLOD, SoVRMLParent, and SoVRMLSwitch.

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 SoVRMLLOD, SoVRMLParent, and SoVRMLSwitch.

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 SoVRMLLOD, SoVRMLParent, and SoVRMLSwitch.

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 SoVRMLLOD, SoVRMLParent, and SoVRMLSwitch.

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 SoVRMLLOD, SoVRMLParent, and SoVRMLSwitch.

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 SoVRMLLOD, SoVRMLParent, and SoVRMLSwitch.

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 SoVRMLLOD, SoVRMLParent, and SoVRMLSwitch.

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.

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

Reimplemented in SoVRMLLOD, SoVRMLParent, and SoVRMLSwitch.

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 SoVRMLLOD, SoVRMLParent, and SoVRMLSwitch.

void SoGroup::doAction SoAction   action [virtual]
 

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

Reimplemented from SoNode.

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

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

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 SoArray, SoLOD, SoLevelOfDetail, SoMultipleCopy, SoSeparator, SoSwitch, SoTransformSeparator, SoVRMLBillboard, SoVRMLGroup, SoVRMLLOD, SoVRMLSwitch, and SoVRMLTransform.

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

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

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

void SoGroup::pick SoPickAction   action [virtual]
 

Action method for SoPickAction.

Does common processing for SoPickAction action instances.

Reimplemented from SoNode.

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

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

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

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

void SoGroup::audioRender SoAudioRenderAction   action [virtual]
 

Action method for SoAudioRenderAction.

Does common processing for SoAudioRenderAction action instances.

Reimplemented from SoNode.

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

SoChildList * SoGroup::getChildren void    const [virtual]
 

Returns list of children.

Reimplemented from SoNode.

Reimplemented in SoVRMLLOD, SoVRMLParent, and SoVRMLSwitch.

SbBool SoGroup::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 SoNode.

Reimplemented in SoSeparator, SoVRMLLOD, SoVRMLParent, and SoVRMLSwitch.

SbBool SoGroup::readChildren SoInput   in [protected, virtual]
 

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

void SoGroup::copyContents const SoFieldContainer   from,
SbBool    copyconnections
[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 method that should be overridden by subclasses which needs to account for internal data that are not handled automatically.

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 SoVRMLLOD, SoVRMLParent, and SoVRMLSwitch.


Member Data Documentation

SoChildList * SoGroup::children [protected]
 

List of managed child nodes.

Reimplemented in SoVRMLParent.


The documentation for this class was generated from the following files:
Generated on Sat May 24 22:39:35 2003 for Coin by doxygen1.2.18