SoGLViewingMatrixElement Class Reference

The SoGLViewingMatrixElement class is used to store the current viewing matrix. More...

#include <Inventor/elements/SoGLViewingMatrixElement.h>

Inheritance diagram for SoGLViewingMatrixElement:

Public Member Functions
virtual void	init (SoState *state)
virtual void	pop (SoState *state, const SoElement *prevTopElement)
virtual void	push (SoState *state)
Public Member Functions inherited from SoReplacedElement
virtual SoElement *	copyMatchInfo () const
SbUniqueId	getNodeId () const
virtual SbBool	matches (const SoElement *element) const
virtual void	print (FILE *file) const
Public Member Functions inherited from SoElement
virtual	~SoElement ()
int	getDepth (void) const
int	getStackIndex (void) const
const SoType	getTypeId (void) const
void	setDepth (const int depth)

Static Public Member Functions
static void *	createInstance (void)
static int	getClassStackIndex (void)
static SoType	getClassTypeId (void)
static SbUniqueId	getNodeId (SoState *const state)
static SbMatrix	getResetMatrix (SoState *state)
static void	initClass (void)
Static Public Member Functions inherited from SoViewingMatrixElement
static void *	createInstance (void)
static const SbMatrix &	get (SoState *const state)
	FIXME: write doc.
static int	getClassStackIndex (void)
static SoType	getClassTypeId (void)
static void	initClass (void)
static void	set (SoState *const state, SoNode *const node, const SbMatrix &ViewingMatrix)
	FIXME: write doc.
Static Public Member Functions inherited from SoReplacedElement
static int	getClassStackIndex (void)
static SoType	getClassTypeId (void)
static void	initClass (void)
Static Public Member Functions inherited from SoElement
static int	getClassStackIndex (void)
static SoType	getClassTypeId (void)
static SoType	getIdFromStackIndex (const int stackIndex)
static int	getNumStackIndices (void)
static void	initClass (void)
static void	initElements (void)

Protected Member Functions
virtual	~SoGLViewingMatrixElement ()
virtual void	setElt (const SbMatrix &matrix)
Protected Member Functions inherited from SoViewingMatrixElement
virtual	~SoViewingMatrixElement ()
Protected Member Functions inherited from SoReplacedElement
virtual	~SoReplacedElement ()
Protected Member Functions inherited from SoElement
	SoElement (void)
void	capture (SoState *const state) const
virtual void	captureThis (SoState *state) const
SoElement *	getNextFree (void) const
SoElement *	getNextInStack (void) const
void	setStackIndex (const int index)
void	setTypeId (const SoType typeId)

Additional Inherited Members
Static Protected Member Functions inherited from SoReplacedElement
static SoElement *	getElement (SoState *const state, const int stackIndex, SoNode *const node)
Static Protected Member Functions inherited from SoElement
static int	createStackIndex (const SoType id)
static const SoElement *	getConstElement (SoState *const state, const int stackIndex)
static SoElement *	getElement (SoState *const state, const int stackIndex)
Protected Attributes inherited from SoViewingMatrixElement
SbMatrix	viewingMatrix
Protected Attributes inherited from SoReplacedElement
SbUniqueId	nodeId
Protected Attributes inherited from SoElement
int	depth
int	stackIndex
SoType	typeId
Static Protected Attributes inherited from SoElement
static int	classStackIndex
static SoTypeList *	stackToType

Detailed Description

The SoGLViewingMatrixElement class is used to store the current viewing matrix.

The viewing matrix contains the inverse camera coordinate system matrix. The camera coordinate system is built from the field values in the current SoCamera (currently either SoPerspectiveCamera or SoOrthographicCamera) and any transformations prior to the camera in the scene graph.

Constructor & Destructor Documentation

~SoGLViewingMatrixElement()

SoGLViewingMatrixElement::~SoGLViewingMatrixElement ( void )

protectedvirtual

Destructor.

Member Function Documentation

createInstance()

void * SoGLViewingMatrixElement::createInstance ( void )

static

This API member is considered internal to the library, as it is not likely to be of interest to the application programmer.

Creates a new instance of the class type corresponding to the SoType object.

getClassStackIndex()

int SoGLViewingMatrixElement::getClassStackIndex ( void )

static

This static method returns the state stack index for the class.

getClassTypeId()

SoType SoGLViewingMatrixElement::getClassTypeId ( void )

static

This static method returns the SoType object associated with objects of this class.

getNodeId()

SbUniqueId SoGLViewingMatrixElement::getNodeId ( SoState *const state )

static

Returns the node id of the current camera node. This is used by SoGLModelMatrixElement to detect a change in the viewing matrix inside an SoTransformSeparator node.

getResetMatrix()

SbMatrix SoGLViewingMatrixElement::getResetMatrix ( SoState * state )

static

Returns the matrix that should be used by SoGLModelMatrixElement when the transformation should be reset during traversal (typically when encountering an SoResetTransform node). It is not sufficient to simply load the viewing matrix, since the transformations that were applied before the camera needs to be accounted for.

This function is an extension for Coin, and it is not available in the original SGI Open Inventor v2.1 API.

Since

Coin 2.0

init()

void SoGLViewingMatrixElement::init ( SoState * state )

virtual

Initializes the element to its default value. The default value is the identity matrix.

Reimplemented from SoViewingMatrixElement.

initClass()

void SoGLViewingMatrixElement::initClass ( void )

static

Initialize relevant common data for all instances, like the type system.

pop()

void SoGLViewingMatrixElement::pop ( SoState * state, const SoElement * prevTopElement )

virtual

This method is called when the state is popped, and the depth of the element is bigger than the current state depth. pop() is called on the new top of stack, and a pointer to the previous top of stack is passed in prevTopElement.

Override this method if you need to copy some state information from the previous top of stack.

Reimplemented from SoElement.

push()

void SoGLViewingMatrixElement::push ( SoState * state )

virtual

This method is called every time a new element is required in one of the stacks. This happens when a writable element is requested, using SoState::getElement() or indirectly SoElement::getElement(), and the depth of the current element is less than the state depth.

Override this method if your element needs to copy data from the previous top of stack. The push() method is called on the new element, and the previous element can be found using SoElement::getNextInStack().

Reimplemented from SoElement.

setElt()

void SoGLViewingMatrixElement::setElt ( const SbMatrix & matrix )

protectedvirtual

Sets the current viewing matrix.

Reimplemented from SoViewingMatrixElement.

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

• SoGLViewingMatrixElement.h
• SoGLViewingMatrixElement.cpp