SoVBO Class Reference

SoVBO is used to manage OpenGL vertex buffer objects. More...

#include <Inventor/misc/SoVBO.h>

Public Member Functions
	SoVBO (GLenum type)
	create VBO of type GL_ARRAY_BUFFER (for vertex/normal/color etc. data) or GL_ELEMENT_ARRAY_BUFFER for index data
	~SoVBO ()
bool	bind (SoState *state)
	bind the buffer to GL, transfer data if not already done.
void	unbind ()
	unbind the VBO in the GL state
bool	isValid (SoState *state)
	Returns if the VBO is valid and it's data is stored on the GPU.
void	setData (int numBytes, const void *data, SbNodeIdType nodeId, SoState *state)
	sets the client buffer data, ownership stays with the caller
SbNodeIdType	getDataId () const
	get the node id of the data
void	clearData ()
	clears the data, freeing it when it is owned by VBO
const void *	getData () const
	get the data pointer
void	freeGL (SoState *state=NULL)
	free the GL part of the VBO (if state is passed, the VBO may be deleted immediately)
bool	hasSwappedRGBAData () const
	returns if the stored data has been swapped to be compatible to OpenGL on little endian machines
void	copyAndSwapPackedRGBA (SoState *state)
	allocates new data buffer, copies the values set by setData() and swaps them bytewise, needed for little endian machines sets hasSwappedRGBAData() flag
void	updateData (void *data)
	update the VBO data from the current data (bind() needs to be called before).

Static Public Member Functions
static bool	shouldUseVBO (SoState *state, int numData)
	returns if a VBO should be used depending on given state and the number of data elements (not bytes)
static bool	isVertexArrayRenderingAllowed ()
	returns of vertex array rendering is allowed.
static int	getVboMinimumSizeLimit ()
	get the lower limit for VBO usage

Detailed Description

Note that the creation of a real OpenGL VBO is deferred until bind() is called, so that the VBO is created lazily. (MeVis ONLY)

Definition at line 51 of file SoVBO.h.

Constructor & Destructor Documentation

SoVBO()

SoVBO::SoVBO

(

GLenum

type

)

~SoVBO()

SoVBO::~SoVBO

(

)

Member Function Documentation

bind()

bool SoVBO::bind

(

SoState *

state

)

Returns true if the VBO could be bound and false otherwise. If the bind call fails, this typically means an out of memory condition because the VBO does not fit on the graphics board.

clearData()

void SoVBO::clearData

(

)

copyAndSwapPackedRGBA()

void SoVBO::copyAndSwapPackedRGBA

(

SoState *

state

)

freeGL()

void SoVBO::freeGL

(

SoState *

state = NULL

)

getData()

const void * SoVBO::getData ( ) const

inline

Definition at line 87 of file SoVBO.h.

getDataId()

SbNodeIdType SoVBO::getDataId ( ) const

inline

Definition at line 81 of file SoVBO.h.

getVboMinimumSizeLimit()

static int SoVBO::getVboMinimumSizeLimit ( )

inlinestatic

Definition at line 100 of file SoVBO.h.

hasSwappedRGBAData()

bool SoVBO::hasSwappedRGBAData ( ) const

inline

Definition at line 93 of file SoVBO.h.

isValid()

bool SoVBO::isValid

(

SoState *

state

)

isVertexArrayRenderingAllowed()

static bool SoVBO::isVertexArrayRenderingAllowed ( )

static

Default is true, this can be disabled by setting the IV_NO_VERTEX_ARRAY environment variable.

setData()

void SoVBO::setData	(	int	numBytes,
		const void *	data,
		SbNodeIdType	nodeId,
		SoState *	state
	)

shouldUseVBO()

static bool SoVBO::shouldUseVBO ( SoState *  state, int  numData  )

static

unbind()

void SoVBO::unbind

(

)

updateData()

void SoVBO::updateData

(

void *

data

)

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

• C:/jh/mevislab/4.0.2_1/build/MeVis/ThirdParty/Sources/Inventor/include/Inventor/misc/SoVBO.h