makVrv::DtOsgShapeCache Class Reference

A cache responsible for storing osg shape geodes. More...

Inheritance diagram for makVrv::DtOsgShapeCache:

Classes
struct	IndexBufferKey
struct	IndexBufferKey_hash
struct	ShapeKey
struct	ShapeKey_hash

Public Types
enum	ShapeType { ShadedCube, ShadedCylinder }

Public Member Functions
	DtOsgShapeCache ()
	CTOR.
virtual	~DtOsgShapeCache ()
	DTOR.
void	releaseResources ()
	Release any hardware resources.
void	ts_clearInstancingCache ()
	Releases any instance memory.
osg::Drawable *	getShapeInstance (ShapeType, unsigned int faceCount)
	Get a shape instance with a given level of detail).
osg::DrawElementsUInt *	getCircularIndexBuffer (int vertexCount, int firstIndex, int indexStep)
	Get a shared circular index buffer for a particular number of vertices This allows for easy circular vertex buffers as the indices are doubled.
Public Member Functions inherited from makVrv::DtVirtualBaseClass
	DtVirtualBaseClass ()
	Do nothing constructor.
virtual	~DtVirtualBaseClass ()
	Virtual do nothing destructor.

Static Public Member Functions
static DtOsgShapeCache &	instance (DtDe &de)
	Get an instance of the DtOsgShape cache.

Protected Types
typedef boost::unordered_map < ShapeKey, osg::ref_ptr < osg::Drawable > , ShapeKey_hash >	ShapeMap
typedef boost::unordered_map < IndexBufferKey, osg::ref_ptr < osg::DrawElementsUInt > , IndexBufferKey_hash >	IndexBufferMap

Protected Member Functions
virtual osg::Drawable *	createShapeInstance (ShapeType, unsigned int faceCount)
	Create a particular shape instance.

Protected Attributes
ShapeMap	myShapeMap
IndexBufferMap	myIndexBufferMap

Detailed Description

A cache responsible for storing osg shape geodes.

Each shape is a unit size (1x1x1).

Member Typedef Documentation

typedef boost::unordered_map<ShapeKey, osg::ref_ptr<osg::Drawable>, ShapeKey_hash > makVrv::DtOsgShapeCache::ShapeMap

protected

typedef boost::unordered_map<IndexBufferKey, osg::ref_ptr<osg::DrawElementsUInt>, IndexBufferKey_hash > makVrv::DtOsgShapeCache::IndexBufferMap

protected

Member Enumeration Documentation

enum makVrv::DtOsgShapeCache::ShapeType

Enumerator:

ShadedCube
ShadedCylinder

Constructor & Destructor Documentation

makVrv::DtOsgShapeCache::DtOsgShapeCache

(

)

CTOR.

virtual makVrv::DtOsgShapeCache::~DtOsgShapeCache ( )

virtual

DTOR.

Member Function Documentation

static DtOsgShapeCache& makVrv::DtOsgShapeCache::instance ( DtDe &  de )

static

Get an instance of the DtOsgShape cache.

void makVrv::DtOsgShapeCache::releaseResources

(

)

Release any hardware resources.

void makVrv::DtOsgShapeCache::ts_clearInstancingCache

(

)

Releases any instance memory.

osg::Drawable* makVrv::DtOsgShapeCache::getShapeInstance	(	ShapeType	,
		unsigned int	faceCount
	)

Get a shape instance with a given level of detail).

osg::DrawElementsUInt* makVrv::DtOsgShapeCache::getCircularIndexBuffer	(	int	vertexCount,
		int	firstIndex,
		int	indexStep
	)

Get a shared circular index buffer for a particular number of vertices This allows for easy circular vertex buffers as the indices are doubled.

For a vertex count of 2, an index buffer of 0,1,0 is returned. The length will be 2 * vertexCount -1.

virtual osg::Drawable* makVrv::DtOsgShapeCache::createShapeInstance ( ShapeType  , unsigned int  faceCount  )

protectedvirtual

Create a particular shape instance.

Member Data Documentation

ShapeMap makVrv::DtOsgShapeCache::myShapeMap

protected

IndexBufferMap makVrv::DtOsgShapeCache::myIndexBufferMap

protected

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

• /exports/nfedora7-1/nightly/docs/vrforcesDevelopment.tot/include/vrvOsg/DtOsgShapeCache.h