This class inherits from osg::Drawable, which allows us to hook into our indirect engine to render using indirect rendering. More...

Inheritance diagram for makVrv::DtIndirectGeometry:

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Public Types
enum	IndirectStates { CullFaceOnState = 0, CullFaceOffState = 1, NumStates = 2 }

Public Member Functions
	DtIndirectGeometry (DtIndirectGeometryRegistrar *registrar, bool viewFrustumCulling, bool lodChecking, bool useInstanceCount)
	CTOR.
virtual void	drawImplementation (osg::RenderInfo &renderInfo) const
	inherited from osg::drawable will do the culling/lod'ing of the instances (via compute shaders) , and subsequent rendering of the instances
virtual void	addInstance (const DtInstance_64 &instance)
	Add an 'instance' of a model.
virtual void	removeAllInstances (void)
	Remove all the instances.
virtual void	accept (osg::NodeVisitor &nv)
	overridden: because we do certain processing (state set modification, etc) that needs to happen outside of the draw pass.
virtual void	setParent (const osg::Group *parent)
	Typically a feature tile node/cdb group node.
virtual void	setDebugDrawString (const std::string &drawString)
	Arbitrary string to 'tag' this geometry will print out this string if the drawImplemention is called and debugging is enabled.
virtual void	setRegistrarInvalid (void)
	Indicate to us that our registrar is now invalid registrars are externally held, and the DtIndirectGeometry needs to know this because it may be deleted much after the registrar has been deleted, and possibly internally to osg.
virtual void	releaseGLObjects (osg::State *state) const

Protected Types
typedef boost::unordered_map < unsigned int, GLuint >	MapContextToVAO

Protected Member Functions
	DtIndirectGeometry ()
	purposely protected. disallow creation, without a registrar
virtual	~DtIndirectGeometry ()
	purposely protected
virtual void	addInstanceActual (const DtInstance_64 &instance)
	actually add the instances that were queued up via possibly multiple threads this happens as part of the drawImplementation call (before the culling and subsequent drawing)
virtual bool	actuallyAddQueuedUpInstances (void)
virtual void	setVisibility (bool visibility)
	visibility
virtual GLuint	getOrCreateAndRecordVAO (const osg::RenderInfo &renderInfo) const
	internal methods to create and 'record' a vertex array object (VAO) using VAO enables us to combine multiple buffer binds into a single 'command' via 'recording' the VAO
virtual void	clearVAO (const osg::RenderInfo &renderInfo)
virtual void	recordVAO (GLuint vao) const
virtual void	slot_rebuild (const DtIndirectGeometryRegistrar::RebuildResult &result)
	the slot for when the registrar rebuilt its internal structures because we need to accordingly update the instances and/or model specs for these instances
virtual void	setUpShadersIfNecessary (osgUtil::CullVisitor *cullVisitor)
	to initialize the shader files cache, because DtIndirectGeometry doesn't have direct access to DtDe yet (it could; but that would break the cdb plugin)
virtual void	installIndirectRenderingProgram (DtOsgShaderFilesCache shaderFilesCache, const std::string &shaderFolderPath, osg::StateSet ss) const
	install the shaders needed to render using indirect rendering
virtual void	installDefaultMaterial (osg::StateSet *ss)
	install a default material on ourselves, so that there's no state leakage with regards ubos/osg::material because we are using materials encoded into an ssbo for indirect rendering

Protected Attributes
DtIndirectGeometryRegistrar *	myRegistrar
	pointer to the (external) registrar
DtInstanceContainer	myInstanceContainer
	container for all the instances registered here
tbb::concurrent_queue < DtInstance_64 >	myQueueInstancesToAdd
	addInstance may be called from multiple threads. Hence, concurrent queue
MapContextToVAO	myMutableMapContextToVAO
DtGpuCullingAndLod *	myCullingAndLOD
DtIndirectRenderingParameters	myMutableIrParams
MapIntToInt	myModelIDsToInstances
osg::ref_ptr< osg::Uniform >	myViewMatrix
osg::ref_ptr< osg::Uniform >	myProjectionMatrix
std::string	myDrawString
bool	myMutableShadersSetup
DtIndirectGeometryStateManager	myStateManager

Detailed Description

This class inherits from osg::Drawable, which allows us to hook into our indirect engine to render using indirect rendering.

Typically, the DtIndirectGeometry is parented to the feature tile nodes and manages the indirect rendering of all the feature points in that tile

Member Typedef Documentation

typedef boost::unordered_map<unsigned int, GLuint> makVrv::DtIndirectGeometry::MapContextToVAO

protected

Member Enumeration Documentation

enum makVrv::DtIndirectGeometry::IndirectStates

Enumerator:

CullFaceOnState
CullFaceOffState
NumStates

Constructor & Destructor Documentation

makVrv::DtIndirectGeometry::DtIndirectGeometry	(	DtIndirectGeometryRegistrar *	registrar,
		bool	viewFrustumCulling,
		bool	lodChecking,
		bool	useInstanceCount
	)

CTOR.

Parameters

registrar	The indirect geometry registrar which will contain the 'specs' corresponding to models whose instances this DtIndirectGeometry rendered This is purposely separated out from DtIndirectGeometry, because several DtIndirectGeometry'ies may share the same models (for example cdb gt layers), in which case all DtIndirectGeometry'ies share the same registrar or use the 1 registrar per tile (as is the case with cdb gs layers) in which case one registrar is made per geometry(tile)
viewFrustumCulling	determines whether the internal cull shader will do the view frustum culling
lodChecking	determines whether whether the internal cull shader will do the lod checking
useInstanceCount	adjusts whether the cull shader will optimize for (mostly) unique models across instances (as is the case with cdb gs instances for example), in which case set the useInstanceCount = false or (mostly) shared models, in which case set the useInstanceCount = true

Remarks: Its still (probably) faster to run the cull shader, so that it may quickly generate the indirect command buffer by redistributing the (possibly) out of order instances in a fast, parallelized fashion , than to use the cpu to do this

makVrv::DtIndirectGeometry::DtIndirectGeometry ( )

protected

purposely protected. disallow creation, without a registrar

virtual makVrv::DtIndirectGeometry::~DtIndirectGeometry ( )

protectedvirtual

purposely protected

Member Function Documentation

virtual void makVrv::DtIndirectGeometry::drawImplementation ( osg::RenderInfo & renderInfo ) const

virtual

inherited from osg::drawable will do the culling/lod'ing of the instances (via compute shaders) , and subsequent rendering of the instances

virtual void makVrv::DtIndirectGeometry::addInstance ( const DtInstance_64 & instance )

virtual

Add an 'instance' of a model.

virtual void makVrv::DtIndirectGeometry::removeAllInstances ( void )

virtual

Remove all the instances.

virtual void makVrv::DtIndirectGeometry::accept ( osg::NodeVisitor & nv )

virtual

overridden: because we do certain processing (state set modification, etc) that needs to happen outside of the draw pass.

So, we check for and do this in the cull visitor pass

virtual void makVrv::DtIndirectGeometry::setParent ( const osg::Group * parent )

virtual

Typically a feature tile node/cdb group node.

virtual void makVrv::DtIndirectGeometry::setDebugDrawString ( const std::string & drawString )

virtual

Arbitrary string to 'tag' this geometry will print out this string if the drawImplemention is called and debugging is enabled.

virtual void makVrv::DtIndirectGeometry::setRegistrarInvalid ( void )

virtual

Indicate to us that our registrar is now invalid registrars are externally held, and the DtIndirectGeometry needs to know this because it may be deleted much after the registrar has been deleted, and possibly internally to osg.

virtual void makVrv::DtIndirectGeometry::releaseGLObjects ( osg::State * state ) const

virtual

virtual void makVrv::DtIndirectGeometry::addInstanceActual ( const DtInstance_64 & instance )

protectedvirtual

actually add the instances that were queued up via possibly multiple threads this happens as part of the drawImplementation call (before the culling and subsequent drawing)

virtual bool makVrv::DtIndirectGeometry::actuallyAddQueuedUpInstances ( void )

protectedvirtual

virtual void makVrv::DtIndirectGeometry::setVisibility ( bool visibility )

protectedvirtual

visibility

virtual GLuint makVrv::DtIndirectGeometry::getOrCreateAndRecordVAO ( const osg::RenderInfo & renderInfo ) const

protectedvirtual

internal methods to create and 'record' a vertex array object (VAO) using VAO enables us to combine multiple buffer binds into a single 'command' via 'recording' the VAO

virtual void makVrv::DtIndirectGeometry::clearVAO ( const osg::RenderInfo & renderInfo )

protectedvirtual

virtual void makVrv::DtIndirectGeometry::recordVAO ( GLuint vao ) const

protectedvirtual

virtual void makVrv::DtIndirectGeometry::slot_rebuild ( const DtIndirectGeometryRegistrar::RebuildResult & result )

protectedvirtual

the slot for when the registrar rebuilt its internal structures because we need to accordingly update the instances and/or model specs for these instances

virtual void makVrv::DtIndirectGeometry::setUpShadersIfNecessary ( osgUtil::CullVisitor * cullVisitor )

protectedvirtual

to initialize the shader files cache, because DtIndirectGeometry doesn't have direct access to DtDe yet (it could; but that would break the cdb plugin)

virtual void makVrv::DtIndirectGeometry::installIndirectRenderingProgram	(	DtOsgShaderFilesCache *	shaderFilesCache,
		const std::string &	shaderFolderPath,
		osg::StateSet *	ss
	)		const

protectedvirtual

install the shaders needed to render using indirect rendering

virtual void makVrv::DtIndirectGeometry::installDefaultMaterial ( osg::StateSet * ss )

protectedvirtual

install a default material on ourselves, so that there's no state leakage with regards ubos/osg::material because we are using materials encoded into an ssbo for indirect rendering

Member Data Documentation

DtIndirectGeometryRegistrar* makVrv::DtIndirectGeometry::myRegistrar

protected

pointer to the (external) registrar

DtInstanceContainer makVrv::DtIndirectGeometry::myInstanceContainer

protected

container for all the instances registered here

tbb::concurrent_queue<DtInstance_64> makVrv::DtIndirectGeometry::myQueueInstancesToAdd

protected

addInstance may be called from multiple threads. Hence, concurrent queue

MapContextToVAO makVrv::DtIndirectGeometry::myMutableMapContextToVAO

mutableprotected

DtGpuCullingAndLod* makVrv::DtIndirectGeometry::myCullingAndLOD

protected

DtIndirectRenderingParameters makVrv::DtIndirectGeometry::myMutableIrParams

mutableprotected

MapIntToInt makVrv::DtIndirectGeometry::myModelIDsToInstances

protected

osg::ref_ptr<osg::Uniform> makVrv::DtIndirectGeometry::myViewMatrix

protected

osg::ref_ptr<osg::Uniform> makVrv::DtIndirectGeometry::myProjectionMatrix

protected

std::string makVrv::DtIndirectGeometry::myDrawString

protected

bool makVrv::DtIndirectGeometry::myMutableShadersSetup

mutableprotected

DtIndirectGeometryStateManager makVrv::DtIndirectGeometry::myStateManager

protected

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

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

Public Types

Public Member Functions

Protected Types

Protected Member Functions

Protected Attributes

Detailed Description

Member Typedef Documentation

Member Enumeration Documentation

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation