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UsdRenderPass Class Reference

A RenderPass prim encapsulates the necessary information to generate multipass renders. More...

#include <pass.h>

+ Inheritance diagram for UsdRenderPass:

Public Member Functions

 UsdRenderPass (const UsdPrim &prim=UsdPrim())
 Construct a UsdRenderPass on UsdPrim prim .
 
 UsdRenderPass (const UsdSchemaBase &schemaObj)
 Construct a UsdRenderPass on the prim held by schemaObj .
 
virtual USDRENDER_API ~UsdRenderPass ()
 Destructor.
 
USDRENDER_API UsdAttribute GetPassTypeAttr () const
 A string used to categorize differently structured or executed types of passes within a customized pipeline.
 
USDRENDER_API UsdAttribute CreatePassTypeAttr (VtValue const &defaultValue=VtValue(), bool writeSparsely=false) const
 See GetPassTypeAttr(), and also Create vs Get Property Methods for when to use Get vs Create.
 
USDRENDER_API UsdAttribute GetCommandAttr () const
 The command to run in order to generate renders for this pass.
 
USDRENDER_API UsdAttribute CreateCommandAttr (VtValue const &defaultValue=VtValue(), bool writeSparsely=false) const
 See GetCommandAttr(), and also Create vs Get Property Methods for when to use Get vs Create.
 
USDRENDER_API UsdAttribute GetFileNameAttr () const
 The asset that contains the rendering prims or other information needed to render this pass.
 
USDRENDER_API UsdAttribute CreateFileNameAttr (VtValue const &defaultValue=VtValue(), bool writeSparsely=false) const
 See GetFileNameAttr(), and also Create vs Get Property Methods for when to use Get vs Create.
 
USDRENDER_API UsdAttribute GetDenoiseEnableAttr () const
 When True, this Pass pass should be denoised.
 
USDRENDER_API UsdAttribute CreateDenoiseEnableAttr (VtValue const &defaultValue=VtValue(), bool writeSparsely=false) const
 See GetDenoiseEnableAttr(), and also Create vs Get Property Methods for when to use Get vs Create.
 
USDRENDER_API UsdRelationship GetRenderSourceRel () const
 The source prim to render from.
 
USDRENDER_API UsdRelationship CreateRenderSourceRel () const
 See GetRenderSourceRel(), and also Create vs Get Property Methods for when to use Get vs Create.
 
USDRENDER_API UsdRelationship GetInputPassesRel () const
 The set of other Passes that this Pass depends on in order to be constructed properly.
 
USDRENDER_API UsdRelationship CreateInputPassesRel () const
 See GetInputPassesRel(), and also Create vs Get Property Methods for when to use Get vs Create.
 
USDRENDER_API UsdRelationship GetDenoisePassRel () const
 The The UsdRenderDenoisePass prim from which to source denoise settings.
 
USDRENDER_API UsdRelationship CreateDenoisePassRel () const
 See GetDenoisePassRel(), and also Create vs Get Property Methods for when to use Get vs Create.
 
USDRENDER_API UsdCollectionAPI GetRenderVisibilityCollectionAPI () const
 Return the UsdCollectionAPI interface used for examining and modifying the render visibility of this prim.
 
- Public Member Functions inherited from UsdTyped
 UsdTyped (const UsdPrim &prim=UsdPrim())
 Construct a UsdTyped on UsdPrim prim .
 
 UsdTyped (const UsdSchemaBase &schemaObj)
 Construct a UsdTyped on the prim held by schemaObj .
 
virtual USD_API ~UsdTyped ()
 Destructor.
 
- Public Member Functions inherited from UsdSchemaBase
bool IsConcrete () const
 Returns whether or not this class corresponds to a concrete instantiable prim type in scene description.
 
bool IsTyped () const
 Returns whether or not this class inherits from UsdTyped.
 
bool IsAPISchema () const
 Returns whether this is an API schema or not.
 
bool IsAppliedAPISchema () const
 Returns whether this is an applied API schema or not.
 
bool IsMultipleApplyAPISchema () const
 Returns whether this is an applied API schema or not.
 
UsdSchemaKind GetSchemaKind () const
 Returns the kind of schema this class is.
 
USD_API UsdSchemaBase (const UsdPrim &prim=UsdPrim())
 Construct and store prim as the held prim.
 
USD_API UsdSchemaBase (const UsdSchemaBase &otherSchema)
 Construct and store for the same prim held by otherSchema.
 
virtual USD_API ~UsdSchemaBase ()
 Destructor.
 
UsdPrim GetPrim () const
 Return this schema object's held prim.
 
SdfPath GetPath () const
 Shorthand for GetPrim()->GetPath().
 
USD_API const UsdPrimDefinitionGetSchemaClassPrimDefinition () const
 Return the prim definition associated with this schema instance if one exists, otherwise return null.
 
USD_API operator bool () const
 Return true if this schema object is compatible with its held prim, false otherwise.
 

Static Public Member Functions

static USDRENDER_API const TfTokenVectorGetSchemaAttributeNames (bool includeInherited=true)
 Return a vector of names of all pre-declared attributes for this schema class and all its ancestor classes.
 
static USDRENDER_API UsdRenderPass Get (const UsdStagePtr &stage, const SdfPath &path)
 Return a UsdRenderPass holding the prim adhering to this schema at path on stage.
 
static USDRENDER_API UsdRenderPass Define (const UsdStagePtr &stage, const SdfPath &path)
 Attempt to ensure a UsdPrim adhering to this schema at path is defined (according to UsdPrim::IsDefined()) on this stage.
 
- Static Public Member Functions inherited from UsdTyped
static USD_API const TfTokenVectorGetSchemaAttributeNames (bool includeInherited=true)
 Return a vector of names of all pre-declared attributes for this schema class and all its ancestor classes.
 
static USD_API UsdTyped Get (const UsdStagePtr &stage, const SdfPath &path)
 Return a UsdTyped holding the prim adhering to this schema at path on stage.
 
- Static Public Member Functions inherited from UsdSchemaBase
static const TfTokenVectorGetSchemaAttributeNames (bool includeInherited=true)
 

Static Public Attributes

static const UsdSchemaKind schemaKind = UsdSchemaKind::ConcreteTyped
 Compile time constant representing what kind of schema this class is.
 
- Static Public Attributes inherited from UsdTyped
static const UsdSchemaKind schemaKind = UsdSchemaKind::AbstractBase
 Compile time constant representing what kind of schema this class is.
 
- Static Public Attributes inherited from UsdSchemaBase
static const UsdSchemaKind schemaKind = UsdSchemaKind::AbstractBase
 Compile time constant representing what kind of schema this class is.
 

Protected Member Functions

USDRENDER_API UsdSchemaKind _GetSchemaKind () const override
 Returns the kind of schema this class belongs to.
 
- Protected Member Functions inherited from UsdTyped
USD_API UsdSchemaKind _GetSchemaKind () const override
 Returns the kind of schema this class belongs to.
 
USD_API bool _IsCompatible () const override
 Subclasses may override _IsCompatible to do specific compatibility checking with the given prim, such as type compatibility or value compatibility.
 
- Protected Member Functions inherited from UsdSchemaBase
virtual UsdSchemaKind _GetSchemaType () const
 
const TfType_GetType () const
 
USD_API UsdAttribute _CreateAttr (TfToken const &attrName, SdfValueTypeName const &typeName, bool custom, SdfVariability variability, VtValue const &defaultValue, bool writeSparsely) const
 

Friends

class UsdSchemaRegistry
 

Detailed Description

A RenderPass prim encapsulates the necessary information to generate multipass renders.

It houses properties for generating dependencies and the necessary commands to run to generate renders, as well as visibility controls for the scene. While RenderSettings describes the information needed to generate images from a single invocation of a renderer, RenderPass describes the additional information needed to generate a time varying set of images.

There are two consumers of RenderPass prims - a runtime executable that generates images from usdRender prims, and pipeline specific code that translates between usdRender prims and the pipeline's resource scheduling software. We'll refer to the latter as 'job submission code'.

The objects that are relevant to the render is specified via the renderVisibility collection (UsdCollectionAPI) and can be accessed via GetRenderVisibilityCollectionAPI(). This collection has includeRoot set to true so that all objects participate in the render by default. To render only a specific set of objects, there are two options. One is to modify the collection paths to explicitly exclude objects that don't participate in the render, assuming it is known; the other option is to set includeRoot to false and explicitly include the desired objects. These are complementary approaches that may each be preferable depending on the scenario.

The name of the prim is used as the pass's name.

For any described attribute Fallback Value or Allowed Values below that are text/tokens, the actual token is published and defined in UsdRenderTokens. So to set an attribute to the value "rightHanded", use UsdRenderTokens->rightHanded as the value.

Definition at line 89 of file pass.h.

Constructor & Destructor Documentation

◆ UsdRenderPass() [1/2]

UsdRenderPass ( const UsdPrim prim = UsdPrim())
inlineexplicit

Construct a UsdRenderPass on UsdPrim prim .

Equivalent to UsdRenderPass::Get(prim.GetStage(), prim.GetPath()) for a valid prim, but will not immediately throw an error for an invalid prim

Definition at line 101 of file pass.h.

◆ UsdRenderPass() [2/2]

UsdRenderPass ( const UsdSchemaBase schemaObj)
inlineexplicit

Construct a UsdRenderPass on the prim held by schemaObj .

Should be preferred over UsdRenderPass(schemaObj.GetPrim()), as it preserves SchemaBase state.

Definition at line 109 of file pass.h.

◆ ~UsdRenderPass()

virtual USDRENDER_API ~UsdRenderPass ( )
virtual

Destructor.

Member Function Documentation

◆ _GetSchemaKind()

USDRENDER_API UsdSchemaKind _GetSchemaKind ( ) const
overrideprotectedvirtual

Returns the kind of schema this class belongs to.

See also
UsdSchemaKind

Reimplemented from UsdTyped.

◆ CreateCommandAttr()

USDRENDER_API UsdAttribute CreateCommandAttr ( VtValue const &  defaultValue = VtValue(),
bool  writeSparsely = false 
) const

See GetCommandAttr(), and also Create vs Get Property Methods for when to use Get vs Create.

If specified, author defaultValue as the attribute's default, sparsely (when it makes sense to do so) if writeSparsely is true - the default for writeSparsely is false.

◆ CreateDenoiseEnableAttr()

USDRENDER_API UsdAttribute CreateDenoiseEnableAttr ( VtValue const &  defaultValue = VtValue(),
bool  writeSparsely = false 
) const

See GetDenoiseEnableAttr(), and also Create vs Get Property Methods for when to use Get vs Create.

If specified, author defaultValue as the attribute's default, sparsely (when it makes sense to do so) if writeSparsely is true - the default for writeSparsely is false.

◆ CreateDenoisePassRel()

USDRENDER_API UsdRelationship CreateDenoisePassRel ( ) const

See GetDenoisePassRel(), and also Create vs Get Property Methods for when to use Get vs Create.

◆ CreateFileNameAttr()

USDRENDER_API UsdAttribute CreateFileNameAttr ( VtValue const &  defaultValue = VtValue(),
bool  writeSparsely = false 
) const

See GetFileNameAttr(), and also Create vs Get Property Methods for when to use Get vs Create.

If specified, author defaultValue as the attribute's default, sparsely (when it makes sense to do so) if writeSparsely is true - the default for writeSparsely is false.

◆ CreateInputPassesRel()

USDRENDER_API UsdRelationship CreateInputPassesRel ( ) const

See GetInputPassesRel(), and also Create vs Get Property Methods for when to use Get vs Create.

◆ CreatePassTypeAttr()

USDRENDER_API UsdAttribute CreatePassTypeAttr ( VtValue const &  defaultValue = VtValue(),
bool  writeSparsely = false 
) const

See GetPassTypeAttr(), and also Create vs Get Property Methods for when to use Get vs Create.

If specified, author defaultValue as the attribute's default, sparsely (when it makes sense to do so) if writeSparsely is true - the default for writeSparsely is false.

◆ CreateRenderSourceRel()

USDRENDER_API UsdRelationship CreateRenderSourceRel ( ) const

See GetRenderSourceRel(), and also Create vs Get Property Methods for when to use Get vs Create.

◆ Define()

static USDRENDER_API UsdRenderPass Define ( const UsdStagePtr &  stage,
const SdfPath path 
)
static

Attempt to ensure a UsdPrim adhering to this schema at path is defined (according to UsdPrim::IsDefined()) on this stage.

If a prim adhering to this schema at path is already defined on this stage, return that prim. Otherwise author an SdfPrimSpec with specifier == SdfSpecifierDef and this schema's prim type name for the prim at path at the current EditTarget. Author SdfPrimSpec s with specifier == SdfSpecifierDef and empty typeName at the current EditTarget for any nonexistent, or existing but not Defined ancestors.

The given path must be an absolute prim path that does not contain any variant selections.

If it is impossible to author any of the necessary PrimSpecs, (for example, in case path cannot map to the current UsdEditTarget's namespace) issue an error and return an invalid UsdPrim.

Note that this method may return a defined prim whose typeName does not specify this schema class, in case a stronger typeName opinion overrides the opinion at the current EditTarget.

◆ Get()

static USDRENDER_API UsdRenderPass Get ( const UsdStagePtr &  stage,
const SdfPath path 
)
static

Return a UsdRenderPass holding the prim adhering to this schema at path on stage.

If no prim exists at path on stage, or if the prim at that path does not adhere to this schema, return an invalid schema object. This is shorthand for the following:

UsdRenderPass(stage->GetPrimAtPath(path));
A RenderPass prim encapsulates the necessary information to generate multipass renders.
Definition: pass.h:90

◆ GetCommandAttr()

USDRENDER_API UsdAttribute GetCommandAttr ( ) const

The command to run in order to generate renders for this pass.

The job submission code can use this to properly send tasks to the job scheduling software that will generate products.

The command can contain variables that will be substituted appropriately during submission, as seen in the example below with {fileName}.

For example: command[0] = "prman" command[1] = "-progress" command[2] = "-pixelvariance" command[3] = "-0.15" command[4] = "{fileName}" # the fileName property will be substituted

Declaration uniform string[] command
C++ Type VtArray<std::string>
Usd Type SdfValueTypeNames->StringArray
Variability SdfVariabilityUniform

◆ GetDenoiseEnableAttr()

USDRENDER_API UsdAttribute GetDenoiseEnableAttr ( ) const

When True, this Pass pass should be denoised.

Declaration uniform bool denoise:enable = 0
C++ Type bool
Usd Type SdfValueTypeNames->Bool
Variability SdfVariabilityUniform

◆ GetDenoisePassRel()

USDRENDER_API UsdRelationship GetDenoisePassRel ( ) const

The The UsdRenderDenoisePass prim from which to source denoise settings.

◆ GetFileNameAttr()

USDRENDER_API UsdAttribute GetFileNameAttr ( ) const

The asset that contains the rendering prims or other information needed to render this pass.

Declaration uniform asset fileName
C++ Type SdfAssetPath
Usd Type SdfValueTypeNames->Asset
Variability SdfVariabilityUniform

◆ GetInputPassesRel()

USDRENDER_API UsdRelationship GetInputPassesRel ( ) const

The set of other Passes that this Pass depends on in order to be constructed properly.

For example, a Pass A may generate a texture, which is then used as an input to Pass B.

By default, usdRender makes some assumptions about the relationship between this prim and the prims listed in inputPasses. Namely, when per-frame tasks are generated from these pass prims, usdRender will assume a one-to-one relationship between tasks that share their frame number. Consider a pass named 'composite' whose inputPasses targets a Pass prim named 'beauty‘.
By default, each frame for 'composite’ will depend on the same frame from 'beauty': beauty.1 -> composite.1 beauty.2 -> composite.2 etc

The consumer of this RenderPass graph of inputs will need to resolve the transitive dependencies.

◆ GetPassTypeAttr()

USDRENDER_API UsdAttribute GetPassTypeAttr ( ) const

A string used to categorize differently structured or executed types of passes within a customized pipeline.

For example, when multiple DCC's (e.g. Houdini, Katana, Nuke) each compute and contribute different Products to a final result, it may be clearest and most flexible to create a separate RenderPass for each.

Declaration uniform token passType
C++ Type TfToken
Usd Type SdfValueTypeNames->Token
Variability SdfVariabilityUniform

◆ GetRenderSourceRel()

USDRENDER_API UsdRelationship GetRenderSourceRel ( ) const

The source prim to render from.

If fileName is not present, the source is assumed to be a RenderSettings prim present in the current Usd stage. If fileName is present, the source should be found in the file there. This relationship might target a string attribute on this or another prim that identifies the appropriate object in the external container.

For example, for a Usd-backed pass, this would point to a RenderSettings prim. Houdini passes would point to a Rop. Nuke passes would point to a write node.

◆ GetRenderVisibilityCollectionAPI()

USDRENDER_API UsdCollectionAPI GetRenderVisibilityCollectionAPI ( ) const

Return the UsdCollectionAPI interface used for examining and modifying the render visibility of this prim.

◆ GetSchemaAttributeNames()

static USDRENDER_API const TfTokenVector & GetSchemaAttributeNames ( bool  includeInherited = true)
static

Return a vector of names of all pre-declared attributes for this schema class and all its ancestor classes.

Does not include attributes that may be authored by custom/extended methods of the schemas involved.

Friends And Related Function Documentation

◆ UsdSchemaRegistry

friend class UsdSchemaRegistry
friend

Definition at line 173 of file pass.h.

Member Data Documentation

◆ schemaKind

const UsdSchemaKind schemaKind = UsdSchemaKind::ConcreteTyped
static

Compile time constant representing what kind of schema this class is.

See also
UsdSchemaKind

Definition at line 95 of file pass.h.


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