The base class of all Scene Graph nodes. More...

#include <sg_node.h>

Inheritance diagram for SGNODE:

Public Member Functions
	SGNODE (SGNODE *aParent)

virtual	~SGNODE ()

S3D::SGTYPES	GetNodeType (void) const noexcept
	Return the type of this node instance.

SGNODE *	GetParent (void) const noexcept
	Returns a pointer to the parent SGNODE of this object or NULL if the object has no parent (ie.

virtual bool	SetParent (SGNODE *aParent, bool notify=true)=0
	Set the parent SGNODE of this object.

bool	SwapParent (SGNODE *aNewParent)
	Swap the ownership with the given parent.

const char *	GetName (void)

void	SetName (const char *aName)

const char *	GetNodeTypeName (S3D::SGTYPES aNodeType) const noexcept

virtual SGNODE *	FindNode (const char aNodeName, const SGNODE aCaller)=0
	Search the tree of linked nodes and return a reference to the first node found with the given name.

virtual bool	AddRefNode (SGNODE *aNode)=0

virtual bool	AddChildNode (SGNODE *aNode)=0

void	AssociateWrapper (SGNODE **aWrapperRef) noexcept
	Associate this object with a handle to itself.

void	DisassociateWrapper (SGNODE **aWrapperRef) noexcept
	Remove the association between an IFSG* wrapper object and this object.

void	ResetNodeIndex (void) noexcept
	Reset the global SG* node indices in preparation for write operations.

virtual void	ReNameNodes (void)=0
	Rename a node and all its child nodes in preparation for write operations.

virtual bool	WriteVRML (std::ostream &aFile, bool aReuseFlag)=0
	Writes this node's data to a VRML file.

virtual bool	WriteCache (std::ostream &aFile, SGNODE *parentNode)=0
	Write this node's data to a binary cache file.

virtual bool	ReadCache (std::istream &aFile, SGNODE *parentNode)=0
	Reads binary format data from a cache file.

virtual void	unlinkChildNode (const SGNODE *aNode)=0
	Remove references to an owned child.

virtual void	unlinkRefNode (const SGNODE *aNode)=0
	Remove pointers to a referenced node.

void	addNodeRef (SGNODE *aNode)
	Add a pointer to a node which references this node, but does not own.

void	delNodeRef (const SGNODE *aNode)
	Remove a pointer to a node which references this node, but does not own.

bool	isWritten (void) noexcept
	Return true if the object had already been written to a cache file or VRML file.

Protected Attributes
std::list< SGNODE * >	m_BackPointers
	nodes which hold a reference to this.

SGNODE *	m_Parent
	Pointer to parent node; may be NULL for top level transform.

S3D::SGTYPES	m_SGtype
	Type of Scene Graph node.

std::string	m_Name
	name to use for referencing the entity by name.

bool	m_written
	Set to true when the object has been written after a ReNameNodes().

Private Attributes
SGNODE **	m_Association
	Handle to the instance held by a wrapper.

Detailed Description

The base class of all Scene Graph nodes.

Definition at line 74 of file sg_node.h.

Constructor & Destructor Documentation

◆ SGNODE()

SGNODE::SGNODE ( SGNODE * aParent )

Definition at line 76 of file sg_node.cpp.

References m_Association, m_Parent, m_SGtype, m_written, and S3D::SGTYPE_END.

◆ ~SGNODE()

SGNODE::~SGNODE ( )

virtual

Definition at line 85 of file sg_node.cpp.

References m_Association, m_BackPointers, m_Parent, and unlinkChildNode().

Member Function Documentation

◆ AddChildNode()

virtual bool SGNODE::AddChildNode ( SGNODE * aNode )

pure virtual

◆ addNodeRef()

void SGNODE::addNodeRef ( SGNODE * aNode )

Add a pointer to a node which references this node, but does not own.

Such back-pointers are required to ensure that invalidated references are removed when a node is deleted.

Parameters

aNode is the node holding a reference to this object.

Definition at line 170 of file sg_node.cpp.

References m_BackPointers.

Referenced by SGFACESET::addNode(), SGSHAPE::addNode(), SGFACESET::ReadCache(), and SGSHAPE::ReadCache().

◆ AddRefNode()

virtual bool SGNODE::AddRefNode ( SGNODE * aNode )

pure virtual

Implemented in SGAPPEARANCE, SGCOLORS, SGCOORDS, SGINDEX, SGNORMALS, SCENEGRAPH, SGFACESET, and SGSHAPE.

Referenced by IFSG_NODE::AddRefNode(), S3D::AddSGNodeRef(), and SwapParent().

◆ AssociateWrapper()

void SGNODE::AssociateWrapper ( SGNODE ** aWrapperRef )

noexcept

Associate this object with a handle to itself.

The handle is typically held by an IFSG* wrapper and the pointer which it refers to is set to NULL upon destruction of this object. This mechanism provides a scheme by which a wrapper can be notified of the destruction of the object which it wraps.

Definition at line 207 of file sg_node.cpp.

Referenced by S3D::AssociateSGNodeWrapper(), IFSG_APPEARANCE::Attach(), IFSG_COLORS::Attach(), IFSG_COORDINDEX::Attach(), IFSG_COORDS::Attach(), IFSG_FACESET::Attach(), IFSG_NORMALS::Attach(), IFSG_SHAPE::Attach(), IFSG_TRANSFORM::Attach(), IFSG_APPEARANCE::IFSG_APPEARANCE(), IFSG_COLORS::IFSG_COLORS(), IFSG_COORDINDEX::IFSG_COORDINDEX(), IFSG_COORDS::IFSG_COORDS(), IFSG_FACESET::IFSG_FACESET(), IFSG_NORMALS::IFSG_NORMALS(), IFSG_SHAPE::IFSG_SHAPE(), IFSG_TRANSFORM::IFSG_TRANSFORM(), IFSG_APPEARANCE::NewNode(), IFSG_COLORS::NewNode(), IFSG_COORDINDEX::NewNode(), IFSG_COORDS::NewNode(), IFSG_FACESET::NewNode(), IFSG_NORMALS::NewNode(), IFSG_SHAPE::NewNode(), and IFSG_TRANSFORM::NewNode().

◆ delNodeRef()

void SGNODE::delNodeRef ( const SGNODE * aNode )

Remove a pointer to a node which references this node, but does not own.

Parameters

aNode is the node holding a reference to this object.

Definition at line 185 of file sg_node.cpp.

References GetNodeType(), m_BackPointers, and m_SGtype.

Referenced by SGFACESET::unlinkNode(), SGSHAPE::unlinkNode(), SGFACESET::~SGFACESET(), and SGSHAPE::~SGSHAPE().

◆ DisassociateWrapper()

void SGNODE::DisassociateWrapper ( SGNODE ** aWrapperRef )

noexcept

Remove the association between an IFSG* wrapper object and this object.

Definition at line 225 of file sg_node.cpp.

Referenced by IFSG_APPEARANCE::Attach(), IFSG_COLORS::Attach(), IFSG_COORDINDEX::Attach(), IFSG_COORDS::Attach(), IFSG_FACESET::Attach(), IFSG_NORMALS::Attach(), IFSG_SHAPE::Attach(), IFSG_TRANSFORM::Attach(), IFSG_NODE::Destroy(), IFSG_APPEARANCE::NewNode(), IFSG_COLORS::NewNode(), IFSG_COORDINDEX::NewNode(), IFSG_COORDS::NewNode(), IFSG_FACESET::NewNode(), IFSG_NORMALS::NewNode(), IFSG_SHAPE::NewNode(), IFSG_TRANSFORM::NewNode(), and IFSG_NODE::~IFSG_NODE().

◆ FindNode()

virtual SGNODE * SGNODE::FindNode	(	const char *	aNodeName,
		const SGNODE *	aCaller
	)

pure virtual

Search the tree of linked nodes and return a reference to the first node found with the given name.

The reference is then typically added to another node via AddRefNode().

Parameters

aNodeName	is the name of the node to search for.
aCaller	is a pointer to the node invoking this function.

Returns: is a valid node pointer on success, otherwise NULL.

Implemented in SGAPPEARANCE, SGCOLORS, SGCOORDS, SGINDEX, SGNORMALS, SCENEGRAPH, SGFACESET, and SGSHAPE.

Referenced by IFSG_NODE::FindNode(), SCENEGRAPH::FindNode(), SGFACESET::FindNode(), and SGSHAPE::FindNode().

◆ GetName()

const char * SGNODE::GetName ( void )

◆ GetNodeType()

S3D::SGTYPES SGNODE::GetNodeType ( void ) const

noexcept

Return the type of this node instance.

Definition at line 104 of file sg_node.cpp.

Referenced by SCENEGRAPH::addNode(), SGFACESET::addNode(), SGSHAPE::addNode(), IFSG_APPEARANCE::Attach(), IFSG_COLORS::Attach(), IFSG_COORDINDEX::Attach(), IFSG_COORDS::Attach(), IFSG_FACESET::Attach(), IFSG_NORMALS::Attach(), IFSG_SHAPE::Attach(), IFSG_TRANSFORM::Attach(), delNodeRef(), S3D::GetMatIndex(), S3D::GetModel(), IFSG_NODE::GetNodeType(), S3D::GetSGNodeType(), IFSG_APPEARANCE::NewNode(), IFSG_COLORS::NewNode(), IFSG_COORDINDEX::NewNode(), IFSG_COORDS::NewNode(), IFSG_FACESET::NewNode(), IFSG_NORMALS::NewNode(), IFSG_SHAPE::NewNode(), IFSG_TRANSFORM::NewNode(), SCENEGRAPH::ReadCache(), SGFACESET::ReadCache(), SGSHAPE::ReadCache(), SCENEGRAPH::SCENEGRAPH(), SCENEGRAPH::SetParent(), SGAPPEARANCE::SetParent(), SGCOLORS::SetParent(), SGCOORDS::SetParent(), SGFACESET::SetParent(), SGINDEX::SetParent(), SGNORMALS::SetParent(), SGSHAPE::SetParent(), SGAPPEARANCE::SGAPPEARANCE(), SGCOLORS::SGCOLORS(), SGCOORDINDEX::SGCOORDINDEX(), SGCOORDS::SGCOORDS(), SGFACESET::SGFACESET(), SGINDEX::SGINDEX(), SGNORMALS::SGNORMALS(), SGSHAPE::SGSHAPE(), SwapParent(), SCENEGRAPH::unlinkNode(), and S3D::WriteVRML().

◆ GetNodeTypeName()

const char * SGNODE::GetNodeTypeName ( S3D::SGTYPES aNodeType ) const

noexcept

Definition at line 164 of file sg_node.cpp.

References node_names.

Referenced by IFSG_NODE::GetNodeTypeName(), IFSG_APPEARANCE::NewNode(), IFSG_COLORS::NewNode(), IFSG_COORDINDEX::NewNode(), IFSG_COORDS::NewNode(), IFSG_FACESET::NewNode(), IFSG_NORMALS::NewNode(), IFSG_SHAPE::NewNode(), and IFSG_TRANSFORM::NewNode().

◆ GetParent()

SGNODE * SGNODE::GetParent ( void ) const

noexcept

Returns a pointer to the parent SGNODE of this object or NULL if the object has no parent (ie.

top level transform).

Definition at line 110 of file sg_node.cpp.

Referenced by IFSG_NODE::GetParent(), S3D::GetSGNodeParent(), IFSG_APPEARANCE::NewNode(), IFSG_COLORS::NewNode(), IFSG_COORDINDEX::NewNode(), IFSG_COORDS::NewNode(), IFSG_FACESET::NewNode(), IFSG_NORMALS::NewNode(), IFSG_SHAPE::NewNode(), IFSG_TRANSFORM::NewNode(), SCENEGRAPH::WriteCache(), SGAPPEARANCE::WriteCache(), SGCOLORS::WriteCache(), SGCOORDS::WriteCache(), SGFACESET::WriteCache(), SGINDEX::WriteCache(), SGNORMALS::WriteCache(), and SGSHAPE::WriteCache().

◆ isWritten()

bool SGNODE::isWritten ( void )

inlinenoexcept

Return true if the object had already been written to a cache file or VRML file.

For internal use only.

Definition at line 220 of file sg_node.h.

References m_written.

Referenced by SCENEGRAPH::WriteCache(), SGFACESET::WriteCache(), and SGSHAPE::WriteCache().

◆ ReadCache()

virtual bool SGNODE::ReadCache	(	std::istream &	aFile,
		SGNODE *	parentNode
	)

pure virtual

Reads binary format data from a cache file.

To read a cache file, open the file for reading and invoke this function from a new SCENEGRAPH node.

Implemented in SCENEGRAPH, SGAPPEARANCE, SGCOLORS, SGCOORDS, SGFACESET, SGINDEX, SGNORMALS, and SGSHAPE.

◆ ReNameNodes()

virtual void SGNODE::ReNameNodes ( void )

pure virtual

Rename a node and all its child nodes in preparation for write operations.

Implemented in SCENEGRAPH, SGAPPEARANCE, SGCOLORS, SGCOORDS, SGFACESET, SGINDEX, SGNORMALS, and SGSHAPE.

Referenced by S3D::RenameNodes(), and S3D::WriteVRML().

◆ ResetNodeIndex()

void SGNODE::ResetNodeIndex ( void )

noexcept

Reset the global SG* node indices in preparation for write operations.

Definition at line 238 of file sg_node.cpp.

References node_counts, and S3D::SGTYPE_END.

Referenced by S3D::ResetNodeIndex(), SCENEGRAPH::WriteCache(), and S3D::WriteVRML().

◆ SetName()

void SGNODE::SetName ( const char * aName )

Definition at line 155 of file sg_node.cpp.

References getNodeName(), m_Name, and m_SGtype.

Referenced by SCENEGRAPH::ReadCache(), SGFACESET::ReadCache(), SGSHAPE::ReadCache(), and IFSG_NODE::SetName().

◆ SetParent()

virtual bool SGNODE::SetParent	(	SGNODE *	aParent,
		bool	notify = `true`
	)

pure virtual

Set the parent SGNODE of this object.

Parameters

aParent [in] is the desired parent node

Returns: true if the operation succeeds; false if the given node is not allowed to be a parent to the derived object.

Implemented in SCENEGRAPH, SGAPPEARANCE, SGCOLORS, SGCOORDS, SGFACESET, SGINDEX, SGNORMALS, and SGSHAPE.

Referenced by IFSG_APPEARANCE::IFSG_APPEARANCE(), IFSG_COLORS::IFSG_COLORS(), IFSG_COORDINDEX::IFSG_COORDINDEX(), IFSG_COORDS::IFSG_COORDS(), IFSG_FACESET::IFSG_FACESET(), IFSG_NORMALS::IFSG_NORMALS(), IFSG_SHAPE::IFSG_SHAPE(), IFSG_TRANSFORM::IFSG_TRANSFORM(), and IFSG_NODE::SetParent().

◆ SwapParent()

bool SGNODE::SwapParent ( SGNODE * aNewParent )

Swap the ownership with the given parent.

This operation may be required when reordering nodes for optimization.

Parameters

aNewParent will become the new parent to the object; it must be the same type as the parent of this instance.

Definition at line 116 of file sg_node.cpp.

References AddChildNode(), AddRefNode(), GetNodeType(), m_Parent, unlinkChildNode(), and unlinkRefNode().

Referenced by SGFACESET::WriteCache(), and SGSHAPE::WriteCache().

◆ unlinkChildNode()

virtual void SGNODE::unlinkChildNode ( const SGNODE * aNode )

pure virtual

Remove references to an owned child.

This is invoked by the child upon destruction to ensure that the parent has no invalid references.

Parameters

aNode is the child which is being deleted.

Implemented in SGINDEX, SGAPPEARANCE, SGCOLORS, SGCOORDS, SGNORMALS, SCENEGRAPH, SGFACESET, and SGSHAPE.

Referenced by SCENEGRAPH::SetParent(), SGAPPEARANCE::SetParent(), SGCOLORS::SetParent(), SGCOORDS::SetParent(), SGFACESET::SetParent(), SGINDEX::SetParent(), SGNORMALS::SetParent(), SGSHAPE::SetParent(), SwapParent(), and ~SGNODE().

◆ unlinkRefNode()

virtual void SGNODE::unlinkRefNode ( const SGNODE * aNode )

pure virtual

Remove pointers to a referenced node.

This is invoked by the referenced node upon destruction to ensure that the referring node has no invalid references.

Parameters

aNode is the node which is being deleted.

Implemented in SGINDEX, SGAPPEARANCE, SGCOLORS, SGCOORDS, SGNORMALS, SCENEGRAPH, SGFACESET, and SGSHAPE.

Referenced by SwapParent().

◆ WriteCache()

virtual bool SGNODE::WriteCache	(	std::ostream &	aFile,
		SGNODE *	parentNode
	)

pure virtual

Write this node's data to a binary cache file.

The data includes all data of children and references to children. If this function is invoked by the user, parentNode must be set to NULL in order to ensure coherent data.

Implemented in SCENEGRAPH, SGAPPEARANCE, SGCOLORS, SGCOORDS, SGFACESET, SGINDEX, SGNORMALS, and SGSHAPE.

Referenced by S3D::WriteCache(), SCENEGRAPH::WriteCache(), SGAPPEARANCE::WriteCache(), SGCOLORS::WriteCache(), SGCOORDS::WriteCache(), SGFACESET::WriteCache(), SGINDEX::WriteCache(), SGNORMALS::WriteCache(), and SGSHAPE::WriteCache().

◆ WriteVRML()

virtual bool SGNODE::WriteVRML	(	std::ostream &	aFile,
		bool	aReuseFlag
	)

pure virtual

Writes this node's data to a VRML file.

This includes all data of child and referenced nodes.

Implemented in SCENEGRAPH, SGAPPEARANCE, SGCOLORS, SGCOORDS, SGFACESET, SGINDEX, SGNORMALS, and SGSHAPE.

Referenced by S3D::WriteVRML().

Member Data Documentation

◆ m_Association

SGNODE** SGNODE::m_Association

private

Handle to the instance held by a wrapper.

Definition at line 233 of file sg_node.h.

Referenced by SGNODE(), and ~SGNODE().

◆ m_BackPointers

std::list< SGNODE* > SGNODE::m_BackPointers

protected

nodes which hold a reference to this.

Definition at line 226 of file sg_node.h.

Referenced by addNodeRef(), SGCOORDS::CalcNormals(), delNodeRef(), and ~SGNODE().

◆ m_Name

std::string SGNODE::m_Name

protected

name to use for referencing the entity by name.

Definition at line 229 of file sg_node.h.

Referenced by SCENEGRAPH::FindNode(), SGFACESET::FindNode(), SGSHAPE::FindNode(), GetName(), SCENEGRAPH::ReadCache(), SCENEGRAPH::ReNameNodes(), SGAPPEARANCE::ReNameNodes(), SGCOLORS::ReNameNodes(), SGCOORDS::ReNameNodes(), SGFACESET::ReNameNodes(), SGINDEX::ReNameNodes(), SGNORMALS::ReNameNodes(), SGSHAPE::ReNameNodes(), and SetName().

◆ m_Parent

SGNODE* SGNODE::m_Parent

protected

Pointer to parent node; may be NULL for top level transform.

Definition at line 227 of file sg_node.h.

Referenced by SGCOORDS::CalcNormals(), SCENEGRAPH::FindNode(), SGFACESET::FindNode(), SGSHAPE::FindNode(), SCENEGRAPH::SCENEGRAPH(), SCENEGRAPH::SetParent(), SGAPPEARANCE::SetParent(), SGCOLORS::SetParent(), SGCOORDS::SetParent(), SGFACESET::SetParent(), SGINDEX::SetParent(), SGNORMALS::SetParent(), SGSHAPE::SetParent(), SGAPPEARANCE::SGAPPEARANCE(), SGCOLORS::SGCOLORS(), SGCOORDINDEX::SGCOORDINDEX(), SGCOORDS::SGCOORDS(), SGFACESET::SGFACESET(), SGINDEX::SGINDEX(), SGNODE(), SGNORMALS::SGNORMALS(), SGSHAPE::SGSHAPE(), SwapParent(), SCENEGRAPH::WriteCache(), SGAPPEARANCE::WriteCache(), SGCOLORS::WriteCache(), SGCOORDS::WriteCache(), SGFACESET::WriteCache(), SGINDEX::WriteCache(), SGNORMALS::WriteCache(), SGSHAPE::WriteCache(), and ~SGNODE().

◆ m_SGtype

S3D::SGTYPES SGNODE::m_SGtype

protected

Type of Scene Graph node.

Definition at line 228 of file sg_node.h.

Referenced by delNodeRef(), GetName(), SCENEGRAPH::SCENEGRAPH(), SetName(), SGAPPEARANCE::SGAPPEARANCE(), SGCOLORS::SGCOLORS(), SGCOORDINDEX::SGCOORDINDEX(), SGCOORDS::SGCOORDS(), SGFACESET::SGFACESET(), SGNODE(), SGNORMALS::SGNORMALS(), SGSHAPE::SGSHAPE(), and SGINDEX::WriteVRML().

◆ m_written

bool SGNODE::m_written

protected

Set to true when the object has been written after a ReNameNodes().

Definition at line 230 of file sg_node.h.

Referenced by isWritten(), SCENEGRAPH::ReNameNodes(), SGAPPEARANCE::ReNameNodes(), SGCOLORS::ReNameNodes(), SGCOORDS::ReNameNodes(), SGFACESET::ReNameNodes(), SGINDEX::ReNameNodes(), SGNORMALS::ReNameNodes(), SGSHAPE::ReNameNodes(), SGNODE(), SCENEGRAPH::WriteCache(), SGAPPEARANCE::WriteCache(), SGCOLORS::WriteCache(), SGCOORDS::WriteCache(), SGFACESET::WriteCache(), SGINDEX::WriteCache(), SGNORMALS::WriteCache(), SGSHAPE::WriteCache(), SCENEGRAPH::WriteVRML(), SGAPPEARANCE::WriteVRML(), SGCOLORS::WriteVRML(), SGCOORDS::WriteVRML(), SGFACESET::WriteVRML(), SGNORMALS::WriteVRML(), and SGSHAPE::WriteVRML().

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

Public Member Functions

Protected Attributes

Private Attributes

Detailed Description

Constructor & Destructor Documentation

◆ SGNODE()

◆ ~SGNODE()

Member Function Documentation

◆ AddChildNode()

◆ addNodeRef()

◆ AddRefNode()

◆ AssociateWrapper()

◆ delNodeRef()

◆ DisassociateWrapper()

◆ FindNode()

◆ GetName()

◆ GetNodeType()

◆ GetNodeTypeName()

◆ GetParent()

◆ isWritten()

◆ ReadCache()

◆ ReNameNodes()

◆ ResetNodeIndex()

◆ SetName()

◆ SetParent()

◆ SwapParent()

◆ unlinkChildNode()

◆ unlinkRefNode()

◆ WriteCache()

◆ WriteVRML()

Member Data Documentation

◆ m_Association

◆ m_BackPointers

◆ m_Name

◆ m_Parent

◆ m_SGtype

◆ m_written