This is a scene index that can switch between multiple inputs (which are fixed at construction time). More...

#include <switchingSceneIndex.h>

Inheritance diagram for HdsiSwitchingSceneIndex:

Public Types
using	ComputeDiffFn = HdsiComputeSceneIndexDiff

Public Types inherited from TfRefBase
typedef void(*	UniqueChangedFuncPtr) (TfRefBase const *, bool)

Public Member Functions
HDSI_API size_t	GetIndex () const
	Returns the current index.

HDSI_API void	SetIndex (size_t index)
	Sets the current index.

HDSI_API std::vector< HdSceneIndexBaseRefPtr >	GetInputScenes () const override

HDSI_API HdSceneIndexPrim	GetPrim (const SdfPath &primPath) const override
	Returns a pair of (prim type, datasource).

HDSI_API SdfPathVector	GetChildPrimPaths (const SdfPath &primPath) const override
	Returns the paths of all scene index prims located immediately below primPath.

virtual std::vector< HdSceneIndexBaseRefPtr >	GetInputScenes () const =0

Public Member Functions inherited from HdSceneIndexBase
HD_API void	AddObserver (const HdSceneIndexObserverPtr &observer)
	Adds an observer to this scene index.

HD_API void	RemoveObserver (const HdSceneIndexObserverPtr &observer)
	Removes an observer from this scene index; the given observer will no longer be forwarded notices.

virtual HdSceneIndexPrim	GetPrim (const SdfPath &primPath) const =0
	Returns a pair of (prim type, datasource).

virtual SdfPathVector	GetChildPrimPaths (const SdfPath &primPath) const =0
	Returns the paths of all scene index prims located immediately below primPath.

HdDataSourceBaseHandle	GetDataSource (const SdfPath &primPath, const HdDataSourceLocator &locator) const
	A convenience function: look up the object at primPath, and if successful return the datasource at locator within that prim.

HD_API void	SystemMessage (const TfToken &messageType, const HdDataSourceBaseHandle &args)
	Sends a message with optional arguments to this and any upstream input scene indices.

HD_API std::string	GetDisplayName () const
	Returns a value previously set by SetDisplayName.

HD_API void	SetDisplayName (const std::string &n)
	Allows for scene index instances to be identified in a more contextually relevant way.

HD_API void	AddTag (const TfToken &tag)
	Adds a specified tag token to a scene index instance.

HD_API void	RemoveTag (const TfToken &tag)
	Removes a specified tag token to a scene index instance.

HD_API bool	HasTag (const TfToken &tag) const
	Returns true if a specified tag token has been added to a scene index instance.

HD_API TfTokenVector	GetTags () const
	Returns all tag tokens currently added to a scene index instance.

Public Member Functions inherited from TfRefBase
	TfRefBase (TfRefBase const &)

TfRefBase &	operator= (TfRefBase const &)

size_t	GetCurrentCount () const
	Return the current reference count of this object.

bool	IsUnique () const
	Return true if only one `TfRefPtr` points to this object.

void	SetShouldInvokeUniqueChangedListener (bool shouldCall)

Public Member Functions inherited from TfWeakBase
	TfWeakBase (const TfWeakBase &)

const TfWeakBase &	__GetTfWeakBase__ () const

const TfWeakBase &	operator= (const TfWeakBase &)

void	EnableNotification2 () const

TF_API void const *	GetUniqueIdentifier () const

Static Public Member Functions
static HdsiSwitchingSceneIndexRefPtr	New (const std::vector< HdSceneIndexBaseRefPtr > &inputs, size_t initialIndex=0, ComputeDiffFn computeDiffFn=HdsiComputeSceneIndexDiffDelta)

Static Public Member Functions inherited from TfRefBase
static TF_API void	SetUniqueChangedListener (UniqueChangedListener listener)

Protected Member Functions
HDSI_API	HdsiSwitchingSceneIndex (const std::vector< HdSceneIndexBaseRefPtr > &inputs, size_t initialIndex, ComputeDiffFn computeDiffFn)

Protected Member Functions inherited from HdSceneIndexBase
HD_API void	_SendPrimsAdded (const HdSceneIndexObserver::AddedPrimEntries &entries)
	Notify attached observers of prims added to the scene.

HD_API void	_SendPrimsRemoved (const HdSceneIndexObserver::RemovedPrimEntries &entries)
	Notify attached observers of prims removed from the scene.

HD_API void	_SendPrimsDirtied (const HdSceneIndexObserver::DirtiedPrimEntries &entries)
	Notify attached observers of datasource invalidations from the scene.

HD_API void	_SendPrimsRenamed (const HdSceneIndexObserver::RenamedPrimEntries &entries)
	Notify attached observers of prims (and their descendents) which have been renamed or reparented.

HD_API bool	_IsObserved () const
	Returns whether the scene index has any registered observers; this information can be used to skip work preparing notices when there are no observers.

virtual HD_API void	_SystemMessage (const TfToken &messageType, const HdDataSourceBaseHandle &args)
	Implement in order to react directly to system messages sent from downstream.

Protected Member Functions inherited from TfWeakBase
TfRefPtr< Tf_Remnant >	_Register () const

template<class T >
TfRefPtr< Tf_Remnant >	_Register (T *tempRmnt) const

bool	_HasRemnant () const

Friends
class	_Observer

Detailed Description

This is a scene index that can switch between multiple inputs (which are fixed at construction time).

By default, this scene index will use HdsiComputeSceneIndexDelta to compute notices to send when the index is changed. If you know more about the input scenes, you can likely provide a more efficient/specialized one.

Definition at line 26 of file switchingSceneIndex.h.

Member Typedef Documentation

◆ ComputeDiffFn

using ComputeDiffFn = HdsiComputeSceneIndexDiff

Definition at line 29 of file switchingSceneIndex.h.

Member Function Documentation

◆ GetChildPrimPaths()

HDSI_API SdfPathVector GetChildPrimPaths ( const SdfPath & primPath ) const

overridevirtual

Returns the paths of all scene index prims located immediately below primPath.

This function can be used to traverse the scene by recursing from SdfPath::AbsoluteRootPath. The traveral is expected to give exactly the set of paths where prim exists as defined in GetPrim. The traversal is also expected to give the same set of prims as the flattening of the scene index's PrimsAdded and PrimsRemoved messages.

This function is expected to be threadsafe.

Implements HdSceneIndexBase.

◆ GetIndex()

HDSI_API size_t GetIndex ( ) const

Returns the current index.

◆ GetInputScenes()

HDSI_API std::vector< HdSceneIndexBaseRefPtr > GetInputScenes ( ) const

overridevirtual

Implements HdFilteringSceneIndexBase.

◆ GetPrim()

HDSI_API HdSceneIndexPrim GetPrim ( const SdfPath & primPath ) const

overridevirtual

Returns a pair of (prim type, datasource).

A prim exists at primPath if and only if datasource is a non-null pointer. In particular, we consider the prim to exist even if the prim type or the container that datasource points to is empty.

Note that we require GetChildPrimPaths to be consistent with this notion of prim existence. That is, unless primPath is the absolute root path, the prim at primPath exists if and only if primPath is contained in GetChildPrimPaths of the parent path.

This function is expected to be threadsafe.

Implements HdSceneIndexBase.

◆ New()

static HdsiSwitchingSceneIndexRefPtr New	(	const std::vector< HdSceneIndexBaseRefPtr > &	inputs,
		size_t	initialIndex = `0`,
		ComputeDiffFn	computeDiffFn = `HdsiComputeSceneIndexDiffDelta`
	)

inlinestatic

Definition at line 32 of file switchingSceneIndex.h.

◆ SetIndex()

HDSI_API void SetIndex ( size_t index )

Sets the current index.

Index must be in [0, GetInputScenes().size()).

Friends And Related Function Documentation

◆ _Observer

friend class _Observer

friend

Definition at line 88 of file switchingSceneIndex.h.

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

pxr/imaging/hdsi/switchingSceneIndex.h

Public Types

Public Member Functions

Static Public Member Functions

Protected Member Functions

Friends

Detailed Description

Member Typedef Documentation

◆ ComputeDiffFn

Member Function Documentation

◆ GetChildPrimPaths()

◆ GetIndex()

◆ GetInputScenes()

◆ GetPrim()

◆ New()

◆ SetIndex()

Friends And Related Function Documentation

◆ _Observer