#include <nurbsCurves.h>

Inheritance diagram for UsdGeomNurbsCurves:

Public Member Functions
	UsdGeomNurbsCurves (const UsdPrim &prim=UsdPrim())

	UsdGeomNurbsCurves (const UsdSchemaBase &schemaObj)

virtual USDGEOM_API	~UsdGeomNurbsCurves ()
	Destructor. More...

USDGEOM_API UsdAttribute	GetOrderAttr () const

USDGEOM_API UsdAttribute	CreateOrderAttr (VtValue const &defaultValue=VtValue(), bool writeSparsely=false) const

USDGEOM_API UsdAttribute	GetKnotsAttr () const

USDGEOM_API UsdAttribute	CreateKnotsAttr (VtValue const &defaultValue=VtValue(), bool writeSparsely=false) const

USDGEOM_API UsdAttribute	GetRangesAttr () const

USDGEOM_API UsdAttribute	CreateRangesAttr (VtValue const &defaultValue=VtValue(), bool writeSparsely=false) const

USDGEOM_API UsdAttribute	GetPointWeightsAttr () const

USDGEOM_API UsdAttribute	CreatePointWeightsAttr (VtValue const &defaultValue=VtValue(), bool writeSparsely=false) const

Public Member Functions inherited from UsdGeomCurves
	UsdGeomCurves (const UsdPrim &prim=UsdPrim())

	UsdGeomCurves (const UsdSchemaBase &schemaObj)

virtual USDGEOM_API	~UsdGeomCurves ()
	Destructor. More...

USDGEOM_API UsdAttribute	GetCurveVertexCountsAttr () const

USDGEOM_API UsdAttribute	CreateCurveVertexCountsAttr (VtValue const &defaultValue=VtValue(), bool writeSparsely=false) const

USDGEOM_API UsdAttribute	GetWidthsAttr () const

USDGEOM_API UsdAttribute	CreateWidthsAttr (VtValue const &defaultValue=VtValue(), bool writeSparsely=false) const

USDGEOM_API TfToken	GetWidthsInterpolation () const

USDGEOM_API bool	SetWidthsInterpolation (TfToken const &interpolation)

USDGEOM_API size_t	GetCurveCount (UsdTimeCode timeCode=UsdTimeCode::Default()) const

Public Member Functions inherited from UsdGeomPointBased
	UsdGeomPointBased (const UsdPrim &prim=UsdPrim())

	UsdGeomPointBased (const UsdSchemaBase &schemaObj)

virtual USDGEOM_API	~UsdGeomPointBased ()
	Destructor. More...

USDGEOM_API UsdAttribute	GetPointsAttr () const

USDGEOM_API UsdAttribute	CreatePointsAttr (VtValue const &defaultValue=VtValue(), bool writeSparsely=false) const

USDGEOM_API UsdAttribute	GetVelocitiesAttr () const

USDGEOM_API UsdAttribute	CreateVelocitiesAttr (VtValue const &defaultValue=VtValue(), bool writeSparsely=false) const

USDGEOM_API UsdAttribute	GetAccelerationsAttr () const

USDGEOM_API UsdAttribute	CreateAccelerationsAttr (VtValue const &defaultValue=VtValue(), bool writeSparsely=false) const

USDGEOM_API UsdAttribute	GetNormalsAttr () const

USDGEOM_API UsdAttribute	CreateNormalsAttr (VtValue const &defaultValue=VtValue(), bool writeSparsely=false) const

USDGEOM_API TfToken	GetNormalsInterpolation () const

USDGEOM_API bool	SetNormalsInterpolation (TfToken const &interpolation)

USDGEOM_API bool	ComputePointsAtTime (VtArray< GfVec3f > *points, const UsdTimeCode time, const UsdTimeCode baseTime) const

USDGEOM_API bool	ComputePointsAtTimes (std::vector< VtArray< GfVec3f >> *pointsArray, const std::vector< UsdTimeCode > &times, const UsdTimeCode baseTime) const

Public Member Functions inherited from UsdGeomGprim
	UsdGeomGprim (const UsdPrim &prim=UsdPrim())

	UsdGeomGprim (const UsdSchemaBase &schemaObj)

virtual USDGEOM_API	~UsdGeomGprim ()
	Destructor. More...

USDGEOM_API UsdAttribute	GetDisplayColorAttr () const

USDGEOM_API UsdAttribute	CreateDisplayColorAttr (VtValue const &defaultValue=VtValue(), bool writeSparsely=false) const

USDGEOM_API UsdAttribute	GetDisplayOpacityAttr () const

USDGEOM_API UsdAttribute	CreateDisplayOpacityAttr (VtValue const &defaultValue=VtValue(), bool writeSparsely=false) const

USDGEOM_API UsdAttribute	GetDoubleSidedAttr () const

USDGEOM_API UsdAttribute	CreateDoubleSidedAttr (VtValue const &defaultValue=VtValue(), bool writeSparsely=false) const

USDGEOM_API UsdAttribute	GetOrientationAttr () const

USDGEOM_API UsdAttribute	CreateOrientationAttr (VtValue const &defaultValue=VtValue(), bool writeSparsely=false) const

USDGEOM_API UsdGeomPrimvar	GetDisplayColorPrimvar () const

USDGEOM_API UsdGeomPrimvar	CreateDisplayColorPrimvar (const TfToken &interpolation=TfToken(), int elementSize=-1) const

USDGEOM_API UsdGeomPrimvar	GetDisplayOpacityPrimvar () const

USDGEOM_API UsdGeomPrimvar	CreateDisplayOpacityPrimvar (const TfToken &interpolation=TfToken(), int elementSize=-1) const

Public Member Functions inherited from UsdGeomBoundable
	UsdGeomBoundable (const UsdPrim &prim=UsdPrim())

	UsdGeomBoundable (const UsdSchemaBase &schemaObj)

virtual USDGEOM_API	~UsdGeomBoundable ()
	Destructor. More...

USDGEOM_API UsdAttribute	GetExtentAttr () const

USDGEOM_API UsdAttribute	CreateExtentAttr (VtValue const &defaultValue=VtValue(), bool writeSparsely=false) const

USDGEOM_API bool	ComputeExtent (const UsdTimeCode &time, VtVec3fArray *extent)

Public Member Functions inherited from UsdGeomXformable
	UsdGeomXformable (const UsdPrim &prim=UsdPrim())

	UsdGeomXformable (const UsdSchemaBase &schemaObj)

virtual USDGEOM_API	~UsdGeomXformable ()
	Destructor. More...

USDGEOM_API UsdAttribute	GetXformOpOrderAttr () const

USDGEOM_API UsdAttribute	CreateXformOpOrderAttr (VtValue const &defaultValue=VtValue(), bool writeSparsely=false) const

USDGEOM_API UsdGeomXformOp	AddXformOp (UsdGeomXformOp::Type const opType, UsdGeomXformOp::Precision const precision=UsdGeomXformOp::PrecisionDouble, TfToken const &opSuffix=TfToken(), bool isInverseOp=false) const

USDGEOM_API UsdGeomXformOp	AddTranslateOp (UsdGeomXformOp::Precision const precision=UsdGeomXformOp::PrecisionDouble, TfToken const &opSuffix=TfToken(), bool isInverseOp=false) const

USDGEOM_API UsdGeomXformOp	AddScaleOp (UsdGeomXformOp::Precision const precision=UsdGeomXformOp::PrecisionFloat, TfToken const &opSuffix=TfToken(), bool isInverseOp=false) const

USDGEOM_API UsdGeomXformOp	AddRotateXOp (UsdGeomXformOp::Precision const precision=UsdGeomXformOp::PrecisionFloat, TfToken const &opSuffix=TfToken(), bool isInverseOp=false) const

USDGEOM_API UsdGeomXformOp	AddRotateYOp (UsdGeomXformOp::Precision const precision=UsdGeomXformOp::PrecisionFloat, TfToken const &opSuffix=TfToken(), bool isInverseOp=false) const

USDGEOM_API UsdGeomXformOp	AddRotateZOp (UsdGeomXformOp::Precision const precision=UsdGeomXformOp::PrecisionFloat, TfToken const &opSuffix=TfToken(), bool isInverseOp=false) const

USDGEOM_API UsdGeomXformOp	AddRotateXYZOp (UsdGeomXformOp::Precision const precision=UsdGeomXformOp::PrecisionFloat, TfToken const &opSuffix=TfToken(), bool isInverseOp=false) const

USDGEOM_API UsdGeomXformOp	AddRotateXZYOp (UsdGeomXformOp::Precision const precision=UsdGeomXformOp::PrecisionFloat, TfToken const &opSuffix=TfToken(), bool isInverseOp=false) const

USDGEOM_API UsdGeomXformOp	AddRotateYXZOp (UsdGeomXformOp::Precision const precision=UsdGeomXformOp::PrecisionFloat, TfToken const &opSuffix=TfToken(), bool isInverseOp=false) const

USDGEOM_API UsdGeomXformOp	AddRotateYZXOp (UsdGeomXformOp::Precision const precision=UsdGeomXformOp::PrecisionFloat, TfToken const &opSuffix=TfToken(), bool isInverseOp=false) const

USDGEOM_API UsdGeomXformOp	AddRotateZXYOp (UsdGeomXformOp::Precision const precision=UsdGeomXformOp::PrecisionFloat, TfToken const &opSuffix=TfToken(), bool isInverseOp=false) const

USDGEOM_API UsdGeomXformOp	AddRotateZYXOp (UsdGeomXformOp::Precision const precision=UsdGeomXformOp::PrecisionFloat, TfToken const &opSuffix=TfToken(), bool isInverseOp=false) const

USDGEOM_API UsdGeomXformOp	AddOrientOp (UsdGeomXformOp::Precision const precision=UsdGeomXformOp::PrecisionFloat, TfToken const &opSuffix=TfToken(), bool isInverseOp=false) const

USDGEOM_API UsdGeomXformOp	AddTransformOp (UsdGeomXformOp::Precision const precision=UsdGeomXformOp::PrecisionDouble, TfToken const &opSuffix=TfToken(), bool isInverseOp=false) const

USDGEOM_API bool	SetResetXformStack (bool resetXform) const

USDGEOM_API bool	GetResetXformStack () const

USDGEOM_API bool	SetXformOpOrder (std::vector< UsdGeomXformOp > const &orderedXformOps, bool resetXformStack=false) const

USDGEOM_API std::vector < UsdGeomXformOp >	GetOrderedXformOps (bool *resetsXformStack) const

USDGEOM_API bool	ClearXformOpOrder () const
	Clears the local transform stack. More...

USDGEOM_API UsdGeomXformOp	MakeMatrixXform () const

USDGEOM_API bool	TransformMightBeTimeVarying () const

USDGEOM_API bool	TransformMightBeTimeVarying (const std::vector< UsdGeomXformOp > &ops) const

USDGEOM_API bool	GetTimeSamples (std::vector< double > *times) const

USDGEOM_API bool	GetTimeSamplesInInterval (const GfInterval &interval, std::vector< double > *times) const

USDGEOM_API bool	GetLocalTransformation (GfMatrix4d transform, bool resetsXformStack, const UsdTimeCode time=UsdTimeCode::Default()) const

USDGEOM_API bool	GetLocalTransformation (GfMatrix4d transform, bool resetsXformStack, const std::vector< UsdGeomXformOp > &ops, const UsdTimeCode time=UsdTimeCode::Default()) const

Public Member Functions inherited from UsdGeomImageable
	UsdGeomImageable (const UsdPrim &prim=UsdPrim())

	UsdGeomImageable (const UsdSchemaBase &schemaObj)

virtual USDGEOM_API	~UsdGeomImageable ()
	Destructor. More...

USDGEOM_API UsdAttribute	GetVisibilityAttr () const

USDGEOM_API UsdAttribute	CreateVisibilityAttr (VtValue const &defaultValue=VtValue(), bool writeSparsely=false) const

USDGEOM_API UsdAttribute	GetPurposeAttr () const

USDGEOM_API UsdAttribute	CreatePurposeAttr (VtValue const &defaultValue=VtValue(), bool writeSparsely=false) const

USDGEOM_API UsdRelationship	GetProxyPrimRel () const

USDGEOM_API UsdRelationship	CreateProxyPrimRel () const

USDGEOM_API void	MakeVisible (const UsdTimeCode &time=UsdTimeCode::Default()) const

USDGEOM_API void	MakeInvisible (const UsdTimeCode &time=UsdTimeCode::Default()) const

USDGEOM_API TfToken	ComputeVisibility (UsdTimeCode const &time=UsdTimeCode::Default()) const

USDGEOM_API UsdAttribute	GetPurposeVisibilityAttr (const TfToken &purpose=UsdGeomTokens->default_) const

USDGEOM_API TfToken	ComputeEffectiveVisibility (const TfToken &purpose=UsdGeomTokens->default_, const UsdTimeCode &time=UsdTimeCode::Default()) const

USDGEOM_API PurposeInfo	ComputePurposeInfo () const

USDGEOM_API PurposeInfo	ComputePurposeInfo (const PurposeInfo &parentPurposeInfo) const

USDGEOM_API TfToken	ComputePurpose () const

USDGEOM_API UsdPrim	ComputeProxyPrim (UsdPrim *renderPrim=NULL) const

USDGEOM_API bool	SetProxyPrim (const UsdPrim &proxy) const

USDGEOM_API bool	SetProxyPrim (const UsdSchemaBase &proxy) const

USDGEOM_API GfBBox3d	ComputeWorldBound (UsdTimeCode const &time, TfToken const &purpose1=TfToken(), TfToken const &purpose2=TfToken(), TfToken const &purpose3=TfToken(), TfToken const &purpose4=TfToken()) const

USDGEOM_API GfBBox3d	ComputeLocalBound (UsdTimeCode const &time, TfToken const &purpose1=TfToken(), TfToken const &purpose2=TfToken(), TfToken const &purpose3=TfToken(), TfToken const &purpose4=TfToken()) const

USDGEOM_API GfBBox3d	ComputeUntransformedBound (UsdTimeCode const &time, TfToken const &purpose1=TfToken(), TfToken const &purpose2=TfToken(), TfToken const &purpose3=TfToken(), TfToken const &purpose4=TfToken()) const

USDGEOM_API GfMatrix4d	ComputeLocalToWorldTransform (UsdTimeCode const &time) const

USDGEOM_API GfMatrix4d	ComputeParentToWorldTransform (UsdTimeCode const &time) const

Public Member Functions inherited from UsdTyped
	UsdTyped (const UsdPrim &prim=UsdPrim())

	UsdTyped (const UsdSchemaBase &schemaObj)

virtual USD_API	~UsdTyped ()
	Destructor. More...

Public Member Functions inherited from UsdSchemaBase
bool	IsConcrete () const

bool	IsTyped () const

bool	IsAPISchema () const
	Returns whether this is an API schema or not. More...

bool	IsAppliedAPISchema () const

bool	IsMultipleApplyAPISchema () const

UsdSchemaKind	GetSchemaKind () const
	Returns the kind of schema this class is. More...

USD_API	UsdSchemaBase (const UsdPrim &prim=UsdPrim())
	Construct and store `prim` as the held prim. More...

USD_API	UsdSchemaBase (const UsdSchemaBase &otherSchema)
	Construct and store for the same prim held by `otherSchema`. More...

virtual USD_API	~UsdSchemaBase ()
	Destructor. More...

USD_API	operator bool () const

UsdPrim	GetPrim () const
	Return this schema object's held prim. More...

SdfPath	GetPath () const
	Shorthand for GetPrim()->GetPath(). More...

USD_API const UsdPrimDefinition *	GetSchemaClassPrimDefinition () const

Static Public Member Functions
static USDGEOM_API const TfTokenVector &	GetSchemaAttributeNames (bool includeInherited=true)

static USDGEOM_API UsdGeomNurbsCurves	Get (const UsdStagePtr &stage, const SdfPath &path)

static USDGEOM_API UsdGeomNurbsCurves	Define (const UsdStagePtr &stage, const SdfPath &path)

Static Public Member Functions inherited from UsdGeomCurves
static USDGEOM_API const TfTokenVector &	GetSchemaAttributeNames (bool includeInherited=true)

static USDGEOM_API UsdGeomCurves	Get (const UsdStagePtr &stage, const SdfPath &path)

static USDGEOM_API bool	ComputeExtent (const VtVec3fArray &points, const VtFloatArray &widths, VtVec3fArray *extent)

static USDGEOM_API bool	ComputeExtent (const VtVec3fArray &points, const VtFloatArray &widths, const GfMatrix4d &transform, VtVec3fArray *extent)

Static Public Member Functions inherited from UsdGeomPointBased
static USDGEOM_API const TfTokenVector &	GetSchemaAttributeNames (bool includeInherited=true)

static USDGEOM_API UsdGeomPointBased	Get (const UsdStagePtr &stage, const SdfPath &path)

static USDGEOM_API bool	ComputeExtent (const VtVec3fArray &points, VtVec3fArray *extent)

static USDGEOM_API bool	ComputeExtent (const VtVec3fArray &points, const GfMatrix4d &transform, VtVec3fArray *extent)

static USDGEOM_API bool	ComputePointsAtTime (VtArray< GfVec3f > *points, UsdStageWeakPtr &stage, UsdTimeCode time, const VtVec3fArray &positions, const VtVec3fArray &velocities, UsdTimeCode velocitiesSampleTime, const VtVec3fArray &accelerations, float velocityScale=1.0)

Static Public Member Functions inherited from UsdGeomGprim
static USDGEOM_API const TfTokenVector &	GetSchemaAttributeNames (bool includeInherited=true)

static USDGEOM_API UsdGeomGprim	Get (const UsdStagePtr &stage, const SdfPath &path)

Static Public Member Functions inherited from UsdGeomBoundable
static USDGEOM_API const TfTokenVector &	GetSchemaAttributeNames (bool includeInherited=true)

static USDGEOM_API UsdGeomBoundable	Get (const UsdStagePtr &stage, const SdfPath &path)

static USDGEOM_API bool	ComputeExtentFromPlugins (const UsdGeomBoundable &boundable, const UsdTimeCode &time, VtVec3fArray *extent)

static USDGEOM_API bool	ComputeExtentFromPlugins (const UsdGeomBoundable &boundable, const UsdTimeCode &time, const GfMatrix4d &transform, VtVec3fArray *extent)

Static Public Member Functions inherited from UsdGeomXformable
static USDGEOM_API const TfTokenVector &	GetSchemaAttributeNames (bool includeInherited=true)

static USDGEOM_API UsdGeomXformable	Get (const UsdStagePtr &stage, const SdfPath &path)

static USDGEOM_API bool	GetTimeSamples (std::vector< UsdGeomXformOp > const &orderedXformOps, std::vector< double > *times)

static USDGEOM_API bool	GetTimeSamplesInInterval (std::vector< UsdGeomXformOp > const &orderedXformOps, const GfInterval &interval, std::vector< double > *times)

static USDGEOM_API bool	GetLocalTransformation (GfMatrix4d *transform, std::vector< UsdGeomXformOp > const &ops, const UsdTimeCode time)

static USDGEOM_API bool	IsTransformationAffectedByAttrNamed (const TfToken &attrName)

Static Public Member Functions inherited from UsdGeomImageable
static USDGEOM_API const TfTokenVector &	GetSchemaAttributeNames (bool includeInherited=true)

static USDGEOM_API UsdGeomImageable	Get (const UsdStagePtr &stage, const SdfPath &path)

static USDGEOM_API const TfTokenVector &	GetOrderedPurposeTokens ()

Static Public Member Functions inherited from UsdTyped
static USD_API const TfTokenVector &	GetSchemaAttributeNames (bool includeInherited=true)

static USD_API UsdTyped	Get (const UsdStagePtr &stage, const SdfPath &path)

Static Public Member Functions inherited from UsdSchemaBase
static const TfTokenVector &	GetSchemaAttributeNames (bool includeInherited=true)

Static Public Attributes
static const UsdSchemaKind	schemaKind = UsdSchemaKind::ConcreteTyped

Static Public Attributes inherited from UsdGeomCurves
static const UsdSchemaKind	schemaKind = UsdSchemaKind::AbstractTyped

Static Public Attributes inherited from UsdGeomPointBased
static const UsdSchemaKind	schemaKind = UsdSchemaKind::AbstractTyped

Static Public Attributes inherited from UsdGeomGprim
static const UsdSchemaKind	schemaKind = UsdSchemaKind::AbstractTyped

Static Public Attributes inherited from UsdGeomBoundable
static const UsdSchemaKind	schemaKind = UsdSchemaKind::AbstractTyped

Static Public Attributes inherited from UsdGeomXformable
static const UsdSchemaKind	schemaKind = UsdSchemaKind::AbstractTyped

Static Public Attributes inherited from UsdGeomImageable
static const UsdSchemaKind	schemaKind = UsdSchemaKind::AbstractTyped

Static Public Attributes inherited from UsdTyped
static const UsdSchemaKind	schemaKind = UsdSchemaKind::AbstractBase

Static Public Attributes inherited from UsdSchemaBase
static const UsdSchemaKind	schemaKind = UsdSchemaKind::AbstractBase

Protected Member Functions
USDGEOM_API UsdSchemaKind	_GetSchemaKind () const override

Protected Member Functions inherited from UsdGeomPointBased
USDGEOM_API UsdSchemaKind	_GetSchemaKind () const override

Protected Member Functions inherited from UsdGeomXformable
USDGEOM_API UsdSchemaKind	_GetSchemaKind () const override

Protected Member Functions inherited from UsdTyped
USD_API bool	_IsCompatible () const override

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

This schema is analagous to NURBS Curves in packages like Maya and Houdini, often used for interchange of rigging and modeling curves. Unlike Maya, this curve spec supports batching of multiple curves into a single prim, widths, and normals in the schema. Additionally, we require 'numSegments + 2 * degree + 1' knots (2 more than maya does). This is to be more consistent with RenderMan's NURBS patch specification.

To express a periodic curve:

knot[0] = knot[1] - (knots[-2] - knots[-3];
knot[-1] = knot[-2] + (knot[2] - knots[1]);

To express a nonperiodic curve:

knot[0] = knot[1];
knot[-1] = knot[-2];

In spite of these slight differences in the spec, curves generated in Maya should be preserved when roundtripping.

order and range, when representing a batched NurbsCurve should be authored one value per curve. knots should be the concatentation of all batched curves.

Definition at line 77 of file nurbsCurves.h.

Constructor & Destructor Documentation

UsdGeomNurbsCurves::UsdGeomNurbsCurves ( const UsdPrim & prim = UsdPrim() )

inlineexplicit

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

Definition at line 89 of file nurbsCurves.h.

UsdGeomNurbsCurves::UsdGeomNurbsCurves ( const UsdSchemaBase & schemaObj )

inlineexplicit

Construct a UsdGeomNurbsCurves on the prim held by schemaObj . Should be preferred over UsdGeomNurbsCurves(schemaObj.GetPrim()), as it preserves SchemaBase state.

Definition at line 97 of file nurbsCurves.h.

virtual USDGEOM_API UsdGeomNurbsCurves::~UsdGeomNurbsCurves ( )

virtual

Destructor.

Member Function Documentation

USDGEOM_API UsdSchemaKind UsdGeomNurbsCurves::_GetSchemaKind ( ) const

overrideprotectedvirtual

Returns the kind of schema this class belongs to.

See Also: UsdSchemaKind

Reimplemented from UsdGeomCurves.

USDGEOM_API UsdAttribute UsdGeomNurbsCurves::CreateKnotsAttr	(	VtValue const &	defaultValue = `VtValue()`,
		bool	writeSparsely = `false`
	)		const

See GetKnotsAttr(), and also Usd_Create_Or_Get_Property 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.

USDGEOM_API UsdAttribute UsdGeomNurbsCurves::CreateOrderAttr	(	VtValue const &	defaultValue = `VtValue()`,
		bool	writeSparsely = `false`
	)		const

See GetOrderAttr(), and also Usd_Create_Or_Get_Property 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.

USDGEOM_API UsdAttribute UsdGeomNurbsCurves::CreatePointWeightsAttr	(	VtValue const &	defaultValue = `VtValue()`,
		bool	writeSparsely = `false`
	)		const

See GetPointWeightsAttr(), and also Usd_Create_Or_Get_Property 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.

USDGEOM_API UsdAttribute UsdGeomNurbsCurves::CreateRangesAttr	(	VtValue const &	defaultValue = `VtValue()`,
		bool	writeSparsely = `false`
	)		const

See GetRangesAttr(), and also Usd_Create_Or_Get_Property 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.

static USDGEOM_API UsdGeomNurbsCurves UsdGeomNurbsCurves::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.

static USDGEOM_API UsdGeomNurbsCurves UsdGeomNurbsCurves::Get	(	const UsdStagePtr &	stage,
		const SdfPath &	path
	)

static

Return a UsdGeomNurbsCurves 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:

UsdGeomNurbsCurves(stage->GetPrimAtPath(path));

USDGEOM_API UsdAttribute UsdGeomNurbsCurves::GetKnotsAttr ( ) const

Knot vector providing curve parameterization. The length of the slice of the array for the ith curve must be ( curveVertexCount[i] + order[i] ), and its entries must take on monotonically increasing values.


Declaration	`double[] knots`
C++ Type	VtArray<double>
Usd Type	SdfValueTypeNames->DoubleArray

USDGEOM_API UsdAttribute UsdGeomNurbsCurves::GetOrderAttr ( ) const

Order of the curve. Order must be positive and is equal to the degree of the polynomial basis to be evaluated, plus 1. Its value for the 'i'th curve must be less than or equal to curveVertexCount[i]


Declaration	`int[] order = []`
C++ Type	VtArray<int>
Usd Type	SdfValueTypeNames->IntArray

USDGEOM_API UsdAttribute UsdGeomNurbsCurves::GetPointWeightsAttr ( ) const

Optionally provides "w" components for each control point, thus must be the same length as the points attribute. If authored, the curve will be rational. If unauthored, the curve will be polynomial, i.e. weight for all points is 1.0.

Note: Some DCC's pre-weight the points, but in this schema, points are not pre-weighted.


Declaration	`double[] pointWeights`
C++ Type	VtArray<double>
Usd Type	SdfValueTypeNames->DoubleArray

USDGEOM_API UsdAttribute UsdGeomNurbsCurves::GetRangesAttr ( ) const

Provides the minimum and maximum parametric values (as defined by knots) over which the curve is actually defined. The minimum must be less than the maximum, and greater than or equal to the value of the knots['i'th curve slice][order[i]-1]. The maxium must be less than or equal to the last element's value in knots['i'th curve slice]. Range maps to (vmin, vmax) in the RenderMan spec.


Declaration	`double2[] ranges`
C++ Type	VtArray<GfVec2d>
Usd Type	SdfValueTypeNames->Double2Array

static USDGEOM_API const TfTokenVector& UsdGeomNurbsCurves::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

friend class UsdSchemaRegistry

friend

Definition at line 161 of file nurbsCurves.h.

Member Data Documentation

const UsdSchemaKind UsdGeomNurbsCurves::schemaKind = UsdSchemaKind::ConcreteTyped

static

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

See Also: UsdSchemaKind

Definition at line 83 of file nurbsCurves.h.

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

pxr/usd/usdGeom/nurbsCurves.h

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