usdrt::UsdRenderSettingsBase

Defined in usdrt/scenegraph/usd/usdRender/settingsBase.h

class UsdRenderSettingsBase : public usdrt::UsdTyped 

Abstract base class that defines render settings that can be specified on either a RenderSettings prim or a RenderProduct prim. 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.

Subclassed by usdrt::UsdRenderProduct, usdrt::UsdRenderSettings

Public Functions

inline explicit UsdRenderSettingsBase(const UsdPrim &prim = UsdPrim()): Construct a UsdRenderSettingsBase on UsdPrim prim. Equivalent to UsdRenderSettingsBase::Get(prim.GetStage(), prim.GetPath()) for a valid prim , but will not immediately throw an error for an invalid prim.

inline explicit UsdRenderSettingsBase(const UsdSchemaBase &schemaObj): Construct a UsdRenderSettingsBase on the prim held by schemaObj . Should be preferred over UsdRenderSettingsBase(schemaObj.GetPrim()), as it preserves SchemaBase state.

inline virtual ~UsdRenderSettingsBase(): Destructor.

inline UsdAttribute GetResolutionAttr() const

The image pixel resolution, corresponding to the camera’s screen window.


Declaration	`uniform int2 resolution = (2048, 1080)`
C++ Type	GfVec2i
Usd Type	SdfValueTypeNames->Int2
Variability	SdfVariabilityUniform

inline UsdAttribute CreateResolutionAttr() const: See GetResolutionAttr(), 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.

inline UsdAttribute GetPixelAspectRatioAttr() const

The aspect ratio (width/height) of image pixels.. The default ratio 1.0 indicates square pixels.


Declaration	`uniform float pixelAspectRatio = 1`
C++ Type	float
Usd Type	SdfValueTypeNames->Float
Variability	SdfVariabilityUniform

inline UsdAttribute CreatePixelAspectRatioAttr() const: See GetPixelAspectRatioAttr(), 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.

inline UsdAttribute GetAspectRatioConformPolicyAttr() const

Indicates the policy to use to resolve an aspect ratio mismatch between the camera aperture and image settings.

This policy allows a standard render setting to do something reasonable given varying camera inputs.

The camera aperture aspect ratio is determined by the aperture atributes on the UsdGeomCamera.

The image aspect ratio is determined by the resolution and pixelAspectRatio attributes in the render settings.

“expandAperture”: if necessary, expand the aperture to fit the image, exposing additional scene content
”cropAperture”: if necessary, crop the aperture to fit the image, cropping scene content
”adjustApertureWidth”: if necessary, adjust aperture width to make its aspect ratio match the image
”adjustApertureHeight”: if necessary, adjust aperture height to make its aspect ratio match the image
”adjustPixelAspectRatio”: compute pixelAspectRatio to make the image exactly cover the aperture; disregards existing attribute value of pixelAspectRatio


Declaration	`uniform token aspectRatioConformPolicy = "expandAperture"`
C++ Type	TfToken
Usd Type	SdfValueTypeNames->Token
Variability	SdfVariabilityUniform
Allowed Values	expandAperture, cropAperture, adjustApertureWidth,

adjustApertureHeight, adjustPixelAspectRatio |

inline UsdAttribute CreateAspectRatioConformPolicyAttr() const: See GetAspectRatioConformPolicyAttr(), 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.

inline UsdAttribute GetDataWindowNDCAttr() const

dataWindowNDC specifies the axis-aligned rectangular region in the adjusted aperture window within which the renderer should produce data.

It is specified as (xmin, ymin, xmax, ymax) in normalized device coordinates, where the range 0 to 1 corresponds to the aperture. (0,0) corresponds to the bottom-left corner and (1,1) corresponds to the upper-right corner.

Specifying a window outside the unit square will produce overscan data. Specifying a window that does not cover the unit square will produce a cropped render.

A pixel is included in the rendered result if the pixel center is contained by the data window. This is consistent with standard rules used by polygon rasterization engines. UsdRenderRasterization

The data window is expressed in NDC so that cropping and overscan may be resolution independent. In interactive workflows, incremental cropping and resolution adjustment may be intermixed to isolate and examine parts of the scene. In compositing workflows, overscan may be used to support image post-processing kernels, and reduced-resolution proxy renders may be used for faster iteration.

The dataWindow:ndc coordinate system references the aperture after any adjustments required by aspectRatioConformPolicy.


Declaration	`uniform float4 dataWindowNDC = (0, 0, 1, 1)`
C++ Type	GfVec4f
Usd Type	SdfValueTypeNames->Float4
Variability	SdfVariabilityUniform

inline UsdAttribute CreateDataWindowNDCAttr() const: See GetDataWindowNDCAttr(), 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.

inline UsdAttribute GetInstantaneousShutterAttr() const

Deprecated - use disableMotionBlur instead. Override the targeted camera’s shutterClose to be equal to the value of its shutterOpen, to produce a zero-width shutter interval. This gives us a convenient way to disable motion blur.


Declaration	`uniform bool instantaneousShutter = 0`
C++ Type	bool
Usd Type	SdfValueTypeNames->Bool
Variability	SdfVariabilityUniform

inline UsdAttribute CreateInstantaneousShutterAttr() const: See GetInstantaneousShutterAttr(), 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.

inline UsdAttribute GetDisableMotionBlurAttr() const

Disable all motion blur by setting the shutter interval of the targeted camera to [0,0] - that is, take only one sample, namely at the current time code.


Declaration	`uniform bool disableMotionBlur = 0`
C++ Type	bool
Usd Type	SdfValueTypeNames->Bool
Variability	SdfVariabilityUniform

inline UsdAttribute CreateDisableMotionBlurAttr() const: See GetDisableMotionBlurAttr(), 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.

inline UsdRelationship GetCameraRel() const: The camera relationship specifies the primary camera to use in a render. It must target a UsdGeomCamera.

inline UsdRelationship CreateCameraRel() const: See GetCameraRel(), and also Create vs Get Property Methods for when to use Get vs Create.

UsdPrim GetPrim() const: Return this schema object’s held prim.

SdfPath GetPath() const: Return the SdfPath to this schema object’s held prim.

inline explicit operator bool() const

Check if this schema object is compatible with it’s held prim and that the prim is valid.

A typed schema object is compatible if the held prim’s type is or is a subtype of the schema’s type. Based on prim.IsA().

An API schema object is compatible if the API is of type SingleApplyAPI or UsdSchemaType::MultipleApplyAPI, and the schema has been applied to the prim. Based on prim.HasAPI.

This method invokes polymorphic behaviour.