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UsdGeomNurbsCurves Class Reference

#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
 
- 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)
 
- 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
 
- 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 TfToken ComputeVisibility (const TfToken &parentVisibility, UsdTimeCode const &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
 
USDGEOM_API UsdGeomPrimvar CreatePrimvar (const TfToken &attrName, const SdfValueTypeName &typeName, const TfToken &interpolation=TfToken(), int elementSize=-1) const
 
USDGEOM_API UsdGeomPrimvar GetPrimvar (const TfToken &name) const
 
USDGEOM_API std::vector
< UsdGeomPrimvar
GetPrimvars () const
 
USDGEOM_API std::vector
< UsdGeomPrimvar
GetAuthoredPrimvars () const
 
USDGEOM_API bool HasPrimvar (const TfToken &name) const
 
- Public Member Functions inherited from UsdTyped
 UsdTyped (const UsdPrim &prim=UsdPrim())
 
 UsdTyped (const UsdSchemaBase &schemaObj)
 
virtual USD_API ~UsdTyped ()
 
- 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
 
UsdSchemaType GetSchemaType () const
 
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 UsdPrimDefinitionGetSchemaClassPrimDefinition () 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)
 
- 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 const TfTokenVectorGetSchemaAttributeNames (bool includeInherited=true)
 
static USD_API UsdTyped Get (const UsdStagePtr &stage, const SdfPath &path)
 
- Static Public Member Functions inherited from UsdSchemaBase
static const TfTokenVectorGetSchemaAttributeNames (bool includeInherited=true)
 

Static Public Attributes

static const UsdSchemaType schemaType = UsdSchemaType::ConcreteTyped
 
- Static Public Attributes inherited from UsdGeomCurves
static const UsdSchemaType schemaType = UsdSchemaType::AbstractTyped
 
- Static Public Attributes inherited from UsdGeomPointBased
static const UsdSchemaType schemaType = UsdSchemaType::AbstractTyped
 
- Static Public Attributes inherited from UsdGeomGprim
static const UsdSchemaType schemaType = UsdSchemaType::AbstractTyped
 
- Static Public Attributes inherited from UsdGeomBoundable
static const UsdSchemaType schemaType = UsdSchemaType::AbstractTyped
 
- Static Public Attributes inherited from UsdGeomXformable
static const UsdSchemaType schemaType = UsdSchemaType::AbstractTyped
 
- Static Public Attributes inherited from UsdGeomImageable
static const UsdSchemaType schemaType = UsdSchemaType::AbstractTyped
 
- Static Public Attributes inherited from UsdTyped
static const UsdSchemaType schemaType = UsdSchemaType::AbstractBase
 
- Static Public Attributes inherited from UsdSchemaBase
static const UsdSchemaType schemaType = UsdSchemaType::AbstractBase
 

Protected Member Functions

USDGEOM_API UsdSchemaType _GetSchemaType () const override
 
- Protected Member Functions inherited from UsdGeomPointBased
USDGEOM_API UsdSchemaType _GetSchemaType () const override
 
- Protected Member Functions inherited from UsdGeomXformable
USDGEOM_API UsdSchemaType _GetSchemaType () const override
 
- Protected Member Functions inherited from UsdTyped
USD_API bool _IsCompatible () const override
 
- Protected Member Functions inherited from UsdSchemaBase
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 UsdSchemaType UsdGeomNurbsCurves::_GetSchemaType ( ) const
overrideprotectedvirtual

Returns the type of schema this class belongs to.

See Also
UsdSchemaType

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::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::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 UsdSchemaType UsdGeomNurbsCurves::schemaType = UsdSchemaType::ConcreteTyped
static

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

See Also
UsdSchemaType

Definition at line 83 of file nurbsCurves.h.


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