SoGLViewingMatrixElement Class Reference

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. More...

#include <Inventor/elements/SoGLViewingMatrixElement.h>

Inheritance diagram for SoGLViewingMatrixElement:

Public Member Functions
virtual void	init (SoState *state)
	FIXME: write doc.
virtual void	push (SoState *state)
virtual void	pop (SoState *state, const SoElement *prevTopElement)
Public Member Functions inherited from SoReplacedElement
virtual SbBool	matches (const SoElement *element) const
virtual SoElement *	copyMatchInfo () const
uint32_t	getNodeId () const
virtual void	print (FILE *file) const
Public Member Functions inherited from SoElement
const SoType	getTypeId (void) const
int	getStackIndex (void) const
void	setDepth (const int depth)
int	getDepth (void) const
virtual	~SoElement ()

Static Public Member Functions
static SoType	getClassTypeId (void)
static int	getClassStackIndex (void)
static void *	createInstance (void)
static void	initClass (void)
static uint32_t	getNodeId (SoState *const state)
static SbMatrix	getResetMatrix (SoState *state)
Static Public Member Functions inherited from SoViewingMatrixElement
static SoType	getClassTypeId (void)
static int	getClassStackIndex (void)
static void *	createInstance (void)
static void	initClass (void)
static void	set (SoState *const state, SoNode *const node, const SbMatrix &ViewingMatrix)
	FIXME: write doc.
static const SbMatrix &	get (SoState *const state)
	FIXME: write doc.
Static Public Member Functions inherited from SoReplacedElement
static SoType	getClassTypeId (void)
static int	getClassStackIndex (void)
static void	initClass (void)
Static Public Member Functions inherited from SoElement
static void	initClass (void)
static SoType	getClassTypeId (void)
static int	getClassStackIndex (void)
static void	initElements (void)
static int	getNumStackIndices (void)
static SoType	getIdFromStackIndex (const int stackIndex)

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
void	setTypeId (const SoType typeId)
void	setStackIndex (const int index)
SoElement *	getNextInStack (void) const
SoElement *	getNextFree (void) const

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 SoElement *	getElement (SoState *const state, const int stackIndex)
static const SoElement *	getConstElement (SoState *const state, const int stackIndex)
static int	createStackIndex (const SoType id)
Protected Attributes inherited from SoViewingMatrixElement
SbMatrix	viewingMatrix
Protected Attributes inherited from SoReplacedElement
uint32_t	nodeId
Protected Attributes inherited from SoElement
SoType	typeId
int	stackIndex
int	depth
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 ( void  )

protectedvirtual

The destructor.

Member Function Documentation

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.

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.

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

virtual

This method is callled 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.

uint32_t 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.

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

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