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vtkWindowedSincPolyDataFilter Class Reference

adjust point positions using a windowed sinc function interpolation kernel More...

#include <vtkWindowedSincPolyDataFilter.h>

Inheritance diagram for vtkWindowedSincPolyDataFilter:
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Collaboration diagram for vtkWindowedSincPolyDataFilter:
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Public Types

typedef vtkPolyDataAlgorithm Superclass
 
- Public Types inherited from vtkPolyDataAlgorithm
typedef vtkAlgorithm Superclass
 
- Public Types inherited from vtkAlgorithm
enum  DesiredOutputPrecision { SINGLE_PRECISION, DOUBLE_PRECISION, DEFAULT_PRECISION }
 Values used for setting the desired output precision for various algorithms. More...
 
typedef vtkObject Superclass
 

Public Member Functions

virtual vtkTypeBool IsA (const char *type)
 Return 1 if this class is the same type of (or a subclass of) the named class. More...
 
vtkWindowedSincPolyDataFilterNewInstance () const
 
void PrintSelf (ostream &os, vtkIndent indent) override
 Methods invoked by print to print information about the object including superclasses. More...
 
virtual void SetNumberOfIterations (int)
 Specify the number of iterations (or degree of the polynomial approximating the windowed sinc function). More...
 
virtual int GetNumberOfIterations ()
 
virtual void SetPassBand (double)
 Set the passband value for the windowed sinc filter. More...
 
virtual double GetPassBand ()
 
virtual void SetNormalizeCoordinates (vtkTypeBool)
 Turn on/off coordinate normalization. More...
 
virtual vtkTypeBool GetNormalizeCoordinates ()
 
virtual void NormalizeCoordinatesOn ()
 
virtual void NormalizeCoordinatesOff ()
 
virtual void SetFeatureEdgeSmoothing (vtkTypeBool)
 Turn on/off smoothing along sharp interior edges. More...
 
virtual vtkTypeBool GetFeatureEdgeSmoothing ()
 
virtual void FeatureEdgeSmoothingOn ()
 
virtual void FeatureEdgeSmoothingOff ()
 
virtual void SetFeatureAngle (double)
 Specify the feature angle for sharp edge identification. More...
 
virtual double GetFeatureAngle ()
 
virtual void SetEdgeAngle (double)
 Specify the edge angle to control smoothing along edges (either interior or boundary). More...
 
virtual double GetEdgeAngle ()
 
virtual void SetBoundarySmoothing (vtkTypeBool)
 Turn on/off the smoothing of vertices on the boundary of the mesh. More...
 
virtual vtkTypeBool GetBoundarySmoothing ()
 
virtual void BoundarySmoothingOn ()
 
virtual void BoundarySmoothingOff ()
 
virtual void SetNonManifoldSmoothing (vtkTypeBool)
 Smooth non-manifold vertices. More...
 
virtual vtkTypeBool GetNonManifoldSmoothing ()
 
virtual void NonManifoldSmoothingOn ()
 
virtual void NonManifoldSmoothingOff ()
 
virtual void SetGenerateErrorScalars (vtkTypeBool)
 Turn on/off the generation of scalar distance values. More...
 
virtual vtkTypeBool GetGenerateErrorScalars ()
 
virtual void GenerateErrorScalarsOn ()
 
virtual void GenerateErrorScalarsOff ()
 
virtual void SetGenerateErrorVectors (vtkTypeBool)
 Turn on/off the generation of error vectors. More...
 
virtual vtkTypeBool GetGenerateErrorVectors ()
 
virtual void GenerateErrorVectorsOn ()
 
virtual void GenerateErrorVectorsOff ()
 
- Public Member Functions inherited from vtkPolyDataAlgorithm
vtkPolyDataAlgorithmNewInstance () const
 
vtkPolyDataGetOutput ()
 Get the output data object for a port on this algorithm. More...
 
vtkPolyDataGetOutput (int)
 
virtual void SetOutput (vtkDataObject *d)
 
vtkTypeBool ProcessRequest (vtkInformation *, vtkInformationVector **, vtkInformationVector *) override
 see vtkAlgorithm for details More...
 
vtkDataObjectGetInput ()
 
vtkDataObjectGetInput (int port)
 
vtkPolyDataGetPolyDataInput (int port)
 
void SetInputData (vtkDataObject *)
 Assign a data object as input. More...
 
void SetInputData (int, vtkDataObject *)
 
void AddInputData (vtkDataObject *)
 Assign a data object as input. More...
 
void AddInputData (int, vtkDataObject *)
 
- Public Member Functions inherited from vtkAlgorithm
vtkAlgorithmNewInstance () const
 
int HasExecutive ()
 Check whether this algorithm has an assigned executive. More...
 
vtkExecutiveGetExecutive ()
 Get this algorithm's executive. More...
 
virtual void SetExecutive (vtkExecutive *executive)
 Set this algorithm's executive. More...
 
vtkTypeBool ProcessRequest (vtkInformation *request, vtkCollection *inInfo, vtkInformationVector *outInfo)
 Version of ProcessRequest() that is wrapped. More...
 
virtual int ComputePipelineMTime (vtkInformation *request, vtkInformationVector **inInfoVec, vtkInformationVector *outInfoVec, int requestFromOutputPort, vtkMTimeType *mtime)
 A special version of ProcessRequest meant specifically for the pipeline modified time request. More...
 
virtual int ModifyRequest (vtkInformation *request, int when)
 This method gives the algorithm a chance to modify the contents of a request before or after (specified in the when argument) it is forwarded. More...
 
vtkInformationGetInputPortInformation (int port)
 Get the information object associated with an input port. More...
 
vtkInformationGetOutputPortInformation (int port)
 Get the information object associated with an output port. More...
 
virtual vtkInformationGetInformation ()
 Set/Get the information object associated with this algorithm. More...
 
virtual void SetInformation (vtkInformation *)
 
int GetNumberOfInputPorts ()
 Get the number of input ports used by the algorithm. More...
 
int GetNumberOfOutputPorts ()
 Get the number of output ports provided by the algorithm. More...
 
void Register (vtkObjectBase *o) override
 Participate in garbage collection. More...
 
void UnRegister (vtkObjectBase *o) override
 Decrease the reference count (release by another object). More...
 
virtual void SetAbortExecute (vtkTypeBool)
 Set/Get the AbortExecute flag for the process object. More...
 
virtual vtkTypeBool GetAbortExecute ()
 
virtual void AbortExecuteOn ()
 
virtual void AbortExecuteOff ()
 
virtual double GetProgress ()
 Get the execution progress of a process object. More...
 
void SetProgress (double)
 SetProgress is deprecated. More...
 
void UpdateProgress (double amount)
 Update the progress of the process object. More...
 
void SetProgressShiftScale (double shift, double scale)
 Specify the shift and scale values to use to apply to the progress amount when UpdateProgress is called. More...
 
virtual double GetProgressShift ()
 
virtual double GetProgressScale ()
 
void SetProgressText (const char *ptext)
 Set the current text message associated with the progress state. More...
 
virtual char * GetProgressText ()
 
virtual unsigned long GetErrorCode ()
 The error code contains a possible error that occurred while reading or writing the file. More...
 
virtual void SetInputArrayToProcess (int idx, int port, int connection, int fieldAssociation, const char *name)
 Set the input data arrays that this algorithm will process. More...
 
virtual void SetInputArrayToProcess (int idx, int port, int connection, int fieldAssociation, int fieldAttributeType)
 
virtual void SetInputArrayToProcess (int idx, vtkInformation *info)
 
virtual void SetInputArrayToProcess (int idx, int port, int connection, const char *fieldAssociation, const char *attributeTypeorName)
 String based versions of SetInputArrayToProcess(). More...
 
vtkInformationGetInputArrayInformation (int idx)
 Get the info object for the specified input array to this algorithm. More...
 
void RemoveAllInputs ()
 Remove all the input data. More...
 
vtkDataObjectGetOutputDataObject (int port)
 Get the data object that will contain the algorithm output for the given port. More...
 
vtkDataObjectGetInputDataObject (int port, int connection)
 Get the data object that will contain the algorithm input for the given port and given connection. More...
 
virtual void SetInputConnection (int port, vtkAlgorithmOutput *input)
 Set the connection for the given input port index. More...
 
virtual void SetInputConnection (vtkAlgorithmOutput *input)
 
virtual void AddInputConnection (int port, vtkAlgorithmOutput *input)
 Add a connection to the given input port index. More...
 
virtual void AddInputConnection (vtkAlgorithmOutput *input)
 
virtual void RemoveInputConnection (int port, vtkAlgorithmOutput *input)
 Remove a connection from the given input port index. More...
 
virtual void RemoveInputConnection (int port, int idx)
 Remove a connection given by index idx. More...
 
virtual void RemoveAllInputConnections (int port)
 Removes all input connections. More...
 
virtual void SetInputDataObject (int port, vtkDataObject *data)
 Sets the data-object as an input on the given port index. More...
 
virtual void SetInputDataObject (vtkDataObject *data)
 
virtual void AddInputDataObject (int port, vtkDataObject *data)
 Add the data-object as an input to this given port. More...
 
virtual void AddInputDataObject (vtkDataObject *data)
 
vtkAlgorithmOutputGetOutputPort (int index)
 Get a proxy object corresponding to the given output port of this algorithm. More...
 
vtkAlgorithmOutputGetOutputPort ()
 
int GetNumberOfInputConnections (int port)
 Get the number of inputs currently connected to a port. More...
 
int GetTotalNumberOfInputConnections ()
 Get the total number of inputs for this algorithm. More...
 
vtkAlgorithmOutputGetInputConnection (int port, int index)
 Get the algorithm output port connected to an input port. More...
 
vtkAlgorithmGetInputAlgorithm (int port, int index, int &algPort)
 Returns the algorithm and the output port index of that algorithm connected to a port-index pair. More...
 
vtkAlgorithmGetInputAlgorithm (int port, int index)
 Returns the algorithm connected to a port-index pair. More...
 
vtkAlgorithmGetInputAlgorithm ()
 Equivalent to GetInputAlgorithm(0, 0). More...
 
vtkExecutiveGetInputExecutive (int port, int index)
 Returns the executive associated with a particular input connection. More...
 
vtkExecutiveGetInputExecutive ()
 Equivalent to GetInputExecutive(0, 0) More...
 
vtkInformationGetInputInformation (int port, int index)
 Return the information object that is associated with a particular input connection. More...
 
vtkInformationGetInputInformation ()
 Equivalent to GetInputInformation(0, 0) More...
 
vtkInformationGetOutputInformation (int port)
 Return the information object that is associated with a particular output port. More...
 
virtual void Update (int port)
 Bring this algorithm's outputs up-to-date. More...
 
virtual void Update ()
 
virtual vtkTypeBool Update (int port, vtkInformationVector *requests)
 This method enables the passing of data requests to the algorithm to be used during execution (in addition to bringing a particular port up-to-date). More...
 
virtual vtkTypeBool Update (vtkInformation *requests)
 Convenience method to update an algorithm after passing requests to its first output port. More...
 
virtual int UpdatePiece (int piece, int numPieces, int ghostLevels, const int extents[6]=nullptr)
 Convenience method to update an algorithm after passing requests to its first output port. More...
 
virtual int UpdateExtent (const int extents[6])
 Convenience method to update an algorithm after passing requests to its first output port. More...
 
virtual int UpdateTimeStep (double time, int piece=-1, int numPieces=1, int ghostLevels=0, const int extents[6]=nullptr)
 Convenience method to update an algorithm after passing requests to its first output port. More...
 
virtual void UpdateInformation ()
 Bring the algorithm's information up-to-date. More...
 
virtual void UpdateDataObject ()
 Create output object(s). More...
 
virtual void PropagateUpdateExtent ()
 Propagate meta-data upstream. More...
 
virtual void UpdateWholeExtent ()
 Bring this algorithm's outputs up-to-date. More...
 
void ConvertTotalInputToPortConnection (int ind, int &port, int &conn)
 Convenience routine to convert from a linear ordering of input connections to a port/connection pair. More...
 
virtual void SetReleaseDataFlag (int)
 Turn release data flag on or off for all output ports. More...
 
virtual int GetReleaseDataFlag ()
 
void ReleaseDataFlagOn ()
 
void ReleaseDataFlagOff ()
 
int UpdateExtentIsEmpty (vtkInformation *pinfo, vtkDataObject *output)
 This detects when the UpdateExtent will generate no data This condition is satisfied when the UpdateExtent has zero volume (0,-1,...) or the UpdateNumberOfPieces is 0. More...
 
int UpdateExtentIsEmpty (vtkInformation *pinfo, int extentType)
 
intGetUpdateExtent ()
 These functions return the update extent for output ports that use 3D extents. More...
 
intGetUpdateExtent (int port)
 
void GetUpdateExtent (int &x0, int &x1, int &y0, int &y1, int &z0, int &z1)
 
void GetUpdateExtent (int port, int &x0, int &x1, int &y0, int &y1, int &z0, int &z1)
 
void GetUpdateExtent (int extent[6])
 
void GetUpdateExtent (int port, int extent[6])
 
int GetUpdatePiece ()
 These functions return the update extent for output ports that use piece extents. More...
 
int GetUpdatePiece (int port)
 
int GetUpdateNumberOfPieces ()
 
int GetUpdateNumberOfPieces (int port)
 
int GetUpdateGhostLevel ()
 
int GetUpdateGhostLevel (int port)
 
void SetProgressObserver (vtkProgressObserver *)
 If an ProgressObserver is set, the algorithm will report progress through it rather than directly. More...
 
virtual vtkProgressObserverGetProgressObserver ()
 
- Public Member Functions inherited from vtkObject
 vtkBaseTypeMacro (vtkObject, vtkObjectBase)
 
virtual void DebugOn ()
 Turn debugging output on. More...
 
virtual void DebugOff ()
 Turn debugging output off. More...
 
bool GetDebug ()
 Get the value of the debug flag. More...
 
void SetDebug (bool debugFlag)
 Set the value of the debug flag. More...
 
virtual void Modified ()
 Update the modification time for this object. More...
 
virtual vtkMTimeType GetMTime ()
 Return this object's modified time. More...
 
unsigned long AddObserver (unsigned long event, vtkCommand *, float priority=0.0f)
 Allow people to add/remove/invoke observers (callbacks) to any VTK object. More...
 
unsigned long AddObserver (const char *event, vtkCommand *, float priority=0.0f)
 
vtkCommandGetCommand (unsigned long tag)
 
void RemoveObserver (vtkCommand *)
 
void RemoveObservers (unsigned long event, vtkCommand *)
 
void RemoveObservers (const char *event, vtkCommand *)
 
vtkTypeBool HasObserver (unsigned long event, vtkCommand *)
 
vtkTypeBool HasObserver (const char *event, vtkCommand *)
 
void RemoveObserver (unsigned long tag)
 
void RemoveObservers (unsigned long event)
 
void RemoveObservers (const char *event)
 
void RemoveAllObservers ()
 
vtkTypeBool HasObserver (unsigned long event)
 
vtkTypeBool HasObserver (const char *event)
 
template<class U , class T >
unsigned long AddObserver (unsigned long event, U observer, void(T::*callback)(), float priority=0.0f)
 Overloads to AddObserver that allow developers to add class member functions as callbacks for events. More...
 
template<class U , class T >
unsigned long AddObserver (unsigned long event, U observer, void(T::*callback)(vtkObject *, unsigned long, void *), float priority=0.0f)
 
template<class U , class T >
unsigned long AddObserver (unsigned long event, U observer, bool(T::*callback)(vtkObject *, unsigned long, void *), float priority=0.0f)
 Allow user to set the AbortFlagOn() with the return value of the callback method. More...
 
int InvokeEvent (unsigned long event, void *callData)
 This method invokes an event and return whether the event was aborted or not. More...
 
int InvokeEvent (const char *event, void *callData)
 
int InvokeEvent (unsigned long event)
 
int InvokeEvent (const char *event)
 
- Public Member Functions inherited from vtkObjectBase
const char * GetClassName () const
 Return the class name as a string. More...
 
virtual void Delete ()
 Delete a VTK object. More...
 
virtual void FastDelete ()
 Delete a reference to this object. More...
 
void InitializeObjectBase ()
 
void Print (ostream &os)
 Print an object to an ostream. More...
 
virtual void PrintHeader (ostream &os, vtkIndent indent)
 
virtual void PrintTrailer (ostream &os, vtkIndent indent)
 
int GetReferenceCount ()
 Return the current reference count of this object. More...
 
void SetReferenceCount (int)
 Sets the reference count. More...
 
void PrintRevisions (ostream &)
 Legacy. More...
 

Static Public Member Functions

static vtkTypeBool IsTypeOf (const char *type)
 
static vtkWindowedSincPolyDataFilterSafeDownCast (vtkObjectBase *o)
 
static vtkWindowedSincPolyDataFilterNew ()
 Construct object with number of iterations 20; passband .1; feature edge smoothing turned off; feature angle 45 degrees; edge angle 15 degrees; and boundary smoothing turned on. More...
 
- Static Public Member Functions inherited from vtkPolyDataAlgorithm
static vtkPolyDataAlgorithmNew ()
 
static vtkTypeBool IsTypeOf (const char *type)
 
static vtkPolyDataAlgorithmSafeDownCast (vtkObjectBase *o)
 
- Static Public Member Functions inherited from vtkAlgorithm
static vtkAlgorithmNew ()
 
static vtkTypeBool IsTypeOf (const char *type)
 
static vtkAlgorithmSafeDownCast (vtkObjectBase *o)
 
static vtkInformationIntegerKeyINPUT_IS_OPTIONAL ()
 Keys used to specify input port requirements. More...
 
static vtkInformationIntegerKeyINPUT_IS_REPEATABLE ()
 
static vtkInformationInformationVectorKeyINPUT_REQUIRED_FIELDS ()
 
static vtkInformationStringVectorKeyINPUT_REQUIRED_DATA_TYPE ()
 
static vtkInformationInformationVectorKeyINPUT_ARRAYS_TO_PROCESS ()
 
static vtkInformationIntegerKeyINPUT_PORT ()
 
static vtkInformationIntegerKeyINPUT_CONNECTION ()
 
static vtkInformationIntegerKeyCAN_PRODUCE_SUB_EXTENT ()
 This key tells the executive that a particular output port is capable of producing an arbitrary subextent of the whole extent. More...
 
static vtkInformationIntegerKeyCAN_HANDLE_PIECE_REQUEST ()
 Key that tells the pipeline that a particular algorithm can or cannot handle piece request. More...
 
static void SetDefaultExecutivePrototype (vtkExecutive *proto)
 If the DefaultExecutivePrototype is set, a copy of it is created in CreateDefaultExecutive() using NewInstance(). More...
 
- Static Public Member Functions inherited from vtkObject
static vtkObjectNew ()
 Create an object with Debug turned off, modified time initialized to zero, and reference counting on. More...
 
static void BreakOnError ()
 This method is called when vtkErrorMacro executes. More...
 
static void SetGlobalWarningDisplay (int val)
 This is a global flag that controls whether any debug, warning or error messages are displayed. More...
 
static void GlobalWarningDisplayOn ()
 
static void GlobalWarningDisplayOff ()
 
static int GetGlobalWarningDisplay ()
 
- Static Public Member Functions inherited from vtkObjectBase
static vtkTypeBool IsTypeOf (const char *name)
 Return 1 if this class type is the same type of (or a subclass of) the named class. More...
 
static vtkObjectBaseNew ()
 Create an object with Debug turned off, modified time initialized to zero, and reference counting on. More...
 

Protected Member Functions

virtual vtkObjectBaseNewInstanceInternal () const
 
 vtkWindowedSincPolyDataFilter ()
 
 ~vtkWindowedSincPolyDataFilter () override
 
int RequestData (vtkInformation *, vtkInformationVector **, vtkInformationVector *) override
 This is called by the superclass. More...
 
- Protected Member Functions inherited from vtkPolyDataAlgorithm
 vtkPolyDataAlgorithm ()
 
 ~vtkPolyDataAlgorithm () override
 
virtual int RequestInformation (vtkInformation *request, vtkInformationVector **inputVector, vtkInformationVector *outputVector)
 
virtual int RequestUpdateExtent (vtkInformation *, vtkInformationVector **, vtkInformationVector *)
 This is called by the superclass. More...
 
int FillOutputPortInformation (int port, vtkInformation *info) override
 Fill the output port information objects for this algorithm. More...
 
int FillInputPortInformation (int port, vtkInformation *info) override
 Fill the input port information objects for this algorithm. More...
 
- Protected Member Functions inherited from vtkAlgorithm
 vtkAlgorithm ()
 
 ~vtkAlgorithm () override
 
virtual void SetNumberOfInputPorts (int n)
 Set the number of input ports used by the algorithm. More...
 
virtual void SetNumberOfOutputPorts (int n)
 Set the number of output ports provided by the algorithm. More...
 
int InputPortIndexInRange (int index, const char *action)
 
int OutputPortIndexInRange (int index, const char *action)
 
int GetInputArrayAssociation (int idx, vtkInformationVector **inputVector)
 Get the assocition of the actual data array for the input array specified by idx, this is only reasonable during the REQUEST_DATA pass. More...
 
int GetInputArrayAssociation (int idx, int connection, vtkInformationVector **inputVector)
 Filters that have multiple connections on one port can use this signature. More...
 
int GetInputArrayAssociation (int idx, vtkDataObject *input)
 
vtkDataArrayGetInputArrayToProcess (int idx, vtkInformationVector **inputVector)
 Get the actual data array for the input array specified by idx, this is only reasonable during the REQUEST_DATA pass. More...
 
vtkDataArrayGetInputArrayToProcess (int idx, vtkInformationVector **inputVector, int &association)
 
vtkDataArrayGetInputArrayToProcess (int idx, int connection, vtkInformationVector **inputVector)
 Filters that have multiple connections on one port can use this signature. More...
 
vtkDataArrayGetInputArrayToProcess (int idx, int connection, vtkInformationVector **inputVector, int &association)
 
vtkDataArrayGetInputArrayToProcess (int idx, vtkDataObject *input)
 
vtkDataArrayGetInputArrayToProcess (int idx, vtkDataObject *input, int &association)
 
vtkAbstractArrayGetInputAbstractArrayToProcess (int idx, vtkInformationVector **inputVector)
 Get the actual data array for the input array specified by idx, this is only reasonable during the REQUEST_DATA pass. More...
 
vtkAbstractArrayGetInputAbstractArrayToProcess (int idx, vtkInformationVector **inputVector, int &association)
 
vtkAbstractArrayGetInputAbstractArrayToProcess (int idx, int connection, vtkInformationVector **inputVector)
 Filters that have multiple connections on one port can use this signature. More...
 
vtkAbstractArrayGetInputAbstractArrayToProcess (int idx, int connection, vtkInformationVector **inputVector, int &association)
 
vtkAbstractArrayGetInputAbstractArrayToProcess (int idx, vtkDataObject *input)
 
vtkAbstractArrayGetInputAbstractArrayToProcess (int idx, vtkDataObject *input, int &association)
 
vtkInformationGetInputArrayFieldInformation (int idx, vtkInformationVector **inputVector)
 This method takes in an index (as specified in SetInputArrayToProcess) and a pipeline information vector. More...
 
virtual vtkExecutiveCreateDefaultExecutive ()
 Create a default executive. More...
 
virtual void SetErrorCode (unsigned long)
 The error code contains a possible error that occurred while reading or writing the file. More...
 
void ReportReferences (vtkGarbageCollector *) override
 
virtual void SetNthInputConnection (int port, int index, vtkAlgorithmOutput *input)
 Replace the Nth connection on the given input port. More...
 
virtual void SetNumberOfInputConnections (int port, int n)
 Set the number of input connections on the given input port. More...
 
void SetInputDataInternal (int port, vtkDataObject *input)
 These methods are used by subclasses to implement methods to set data objects directly as input. More...
 
void AddInputDataInternal (int port, vtkDataObject *input)
 
- Protected Member Functions inherited from vtkObject
 vtkObject ()
 
 ~vtkObject () override
 
void RegisterInternal (vtkObjectBase *, vtkTypeBool check) override
 
void UnRegisterInternal (vtkObjectBase *, vtkTypeBool check) override
 
void InternalGrabFocus (vtkCommand *mouseEvents, vtkCommand *keypressEvents=nullptr)
 These methods allow a command to exclusively grab all events. More...
 
void InternalReleaseFocus ()
 
- Protected Member Functions inherited from vtkObjectBase
 vtkObjectBase ()
 
virtual ~vtkObjectBase ()
 
virtual void CollectRevisions (ostream &)
 
 vtkObjectBase (const vtkObjectBase &)
 
void operator= (const vtkObjectBase &)
 

Protected Attributes

int NumberOfIterations
 
double PassBand
 
vtkTypeBool FeatureEdgeSmoothing
 
double FeatureAngle
 
double EdgeAngle
 
vtkTypeBool BoundarySmoothing
 
vtkTypeBool NonManifoldSmoothing
 
vtkTypeBool GenerateErrorScalars
 
vtkTypeBool GenerateErrorVectors
 
vtkTypeBool NormalizeCoordinates
 
- Protected Attributes inherited from vtkAlgorithm
vtkInformationInformation
 
unsigned long ErrorCode
 
double Progress
 
char * ProgressText
 
vtkProgressObserverProgressObserver
 
- Protected Attributes inherited from vtkObject
bool Debug
 
vtkTimeStamp MTime
 
vtkSubjectHelper * SubjectHelper
 
- Protected Attributes inherited from vtkObjectBase
std::atomic< int32_t > ReferenceCount
 
vtkWeakPointerBase ** WeakPointers
 

Additional Inherited Members

- Public Attributes inherited from vtkAlgorithm
vtkTypeBool AbortExecute
 
- Static Protected Member Functions inherited from vtkAlgorithm
static vtkInformationIntegerKeyPORT_REQUIREMENTS_FILLED ()
 
- Static Protected Attributes inherited from vtkAlgorithm
static vtkExecutiveDefaultExecutivePrototype
 

Detailed Description

adjust point positions using a windowed sinc function interpolation kernel

vtkWindowedSincPolyDataFiler adjust point coordinate using a windowed sinc function interpolation kernel. The effect is to "relax" the mesh, making the cells better shaped and the vertices more evenly distributed. Note that this filter operates the lines, polygons, and triangle strips composing an instance of vtkPolyData. Vertex or poly-vertex cells are never modified.

The algorithm proceeds as follows. For each vertex v, a topological and geometric analysis is performed to determine which vertices are connected to v, and which cells are connected to v. Then, a connectivity array is constructed for each vertex. (The connectivity array is a list of lists of vertices that directly attach to each vertex.) Next, an iteration phase begins over all vertices. For each vertex v, the coordinates of v are modified using a windowed sinc function interpolation kernel. Taubin describes this methodology is the IBM tech report RC-20404 (#90237, dated 3/12/96) "Optimal Surface Smoothing as Filter Design" G. Taubin, T. Zhang and G. Golub. (Zhang and Golub are at Stanford University).

This report discusses using standard signal processing low-pass filters (in particular windowed sinc functions) to smooth polyhedra. The transfer functions of the low-pass filters are approximated by Chebyshev polynomials. This facilitates applying the filters in an iterative diffusion process (as opposed to a kernel convolution). The more smoothing iterations applied, the higher the degree of polynomial approximating the low-pass filter transfer function. Each smoothing iteration, therefore, applies the next higher term of the Chebyshev filter approximation to the polyhedron. This decoupling of the filter into an iteratively applied polynomial is possible since the Chebyshev polynomials are orthogonal, i.e. increasing the order of the approximation to the filter transfer function does not alter the previously calculated coefficients for the low order terms.

Note: Care must be taken to avoid smoothing with too few iterations. A Chebyshev approximation with too few terms is an poor approximation. The first few smoothing iterations represent a severe scaling and translation of the data. Subsequent iterations cause the smoothed polyhedron to converge to the true location and scale of the object. We have attempted to protect against this by automatically adjusting the filter, effectively widening the pass band. This adjustment is only possible if the number of iterations is greater than 1. Note that this sacrifices some degree of smoothing for model integrity. For those interested, the filter is adjusted by searching for a value sigma such that the actual pass band is k_pb + sigma and such that the filter transfer function evaluates to unity at k_pb, i.e. f(k_pb) = 1

To improve the numerical stability of the solution and minimize the scaling the translation effects, the algorithm can translate and scale the position coordinates to within the unit cube [-1, 1], perform the smoothing, and translate and scale the position coordinates back to the original coordinate frame. This mode is controlled with the NormalizeCoordinatesOn() / NormalizeCoordinatesOff() methods. For legacy reasons, the default is NormalizeCoordinatesOff.

This implementation is currently limited to using an interpolation kernel based on Hamming windows. Other windows (such as Hann, Blackman, Kaiser, Lanczos, Gaussian, and exponential windows) could be used instead.

There are some special instance variables used to control the execution of this filter. (These ivars basically control what vertices can be smoothed, and the creation of the connectivity array.) The BoundarySmoothing ivar enables/disables the smoothing operation on vertices that are on the "boundary" of the mesh. A boundary vertex is one that is surrounded by a semi-cycle of polygons (or used by a single line).

Another important ivar is FeatureEdgeSmoothing. If this ivar is enabled, then interior vertices are classified as either "simple", "interior edge", or "fixed", and smoothed differently. (Interior vertices are manifold vertices surrounded by a cycle of polygons; or used by two line cells.) The classification is based on the number of feature edges attached to v. A feature edge occurs when the angle between the two surface normals of a polygon sharing an edge is greater than the FeatureAngle ivar. Then, vertices used by no feature edges are classified "simple", vertices used by exactly two feature edges are classified "interior edge", and all others are "fixed" vertices.

Once the classification is known, the vertices are smoothed differently. Corner (i.e., fixed) vertices are not smoothed at all. Simple vertices are smoothed as before . Interior edge vertices are smoothed only along their two connected edges, and only if the angle between the edges is less than the EdgeAngle ivar.

The total smoothing can be controlled by using two ivars. The NumberOfIterations determines the maximum number of smoothing passes. The NumberOfIterations corresponds to the degree of the polynomial that is used to approximate the windowed sinc function. Ten or twenty iterations is all the is usually necessary. Contrast this with vtkSmoothPolyDataFilter which usually requires 100 to 200 smoothing iterations. vtkSmoothPolyDataFilter is also not an approximation to an ideal low-pass filter, which can cause the geometry to shrink as the amount of smoothing increases.

The second ivar is the specification of the PassBand for the windowed sinc filter. By design, the PassBand is specified as a doubleing point number between 0 and 2. Lower PassBand values produce more smoothing. A good default value for the PassBand is 0.1 (for those interested, the PassBand (and frequencies) for PolyData are based on the valence of the vertices, this limits all the frequency modes in a polyhedral mesh to between 0 and 2.)

There are two instance variables that control the generation of error data. If the ivar GenerateErrorScalars is on, then a scalar value indicating the distance of each vertex from its original position is computed. If the ivar GenerateErrorVectors is on, then a vector representing change in position is computed.

Warning
The smoothing operation reduces high frequency information in the geometry of the mesh. With excessive smoothing important details may be lost. Enabling FeatureEdgeSmoothing helps reduce this effect, but cannot entirely eliminate it.
See also
vtkSmoothPolyDataFilter vtkDecimate vtkDecimatePro
Examples:
vtkWindowedSincPolyDataFilter (Examples)
Tests:
vtkWindowedSincPolyDataFilter (Tests)

Definition at line 151 of file vtkWindowedSincPolyDataFilter.h.

Member Typedef Documentation

◆ Superclass

Definition at line 154 of file vtkWindowedSincPolyDataFilter.h.

Constructor & Destructor Documentation

◆ vtkWindowedSincPolyDataFilter()

vtkWindowedSincPolyDataFilter::vtkWindowedSincPolyDataFilter ( )
protected

◆ ~vtkWindowedSincPolyDataFilter()

vtkWindowedSincPolyDataFilter::~vtkWindowedSincPolyDataFilter ( )
inlineoverrideprotected

Definition at line 262 of file vtkWindowedSincPolyDataFilter.h.

Member Function Documentation

◆ IsTypeOf()

static vtkTypeBool vtkWindowedSincPolyDataFilter::IsTypeOf ( const char *  type)
static

◆ IsA()

virtual vtkTypeBool vtkWindowedSincPolyDataFilter::IsA ( const char *  name)
virtual

Return 1 if this class is the same type of (or a subclass of) the named class.

Returns 0 otherwise. This method works in combination with vtkTypeMacro found in vtkSetGet.h.

Reimplemented from vtkPolyDataAlgorithm.

◆ SafeDownCast()

static vtkWindowedSincPolyDataFilter* vtkWindowedSincPolyDataFilter::SafeDownCast ( vtkObjectBase o)
static

◆ NewInstanceInternal()

virtual vtkObjectBase* vtkWindowedSincPolyDataFilter::NewInstanceInternal ( ) const
protectedvirtual

Reimplemented from vtkPolyDataAlgorithm.

◆ NewInstance()

vtkWindowedSincPolyDataFilter* vtkWindowedSincPolyDataFilter::NewInstance ( ) const

◆ PrintSelf()

void vtkWindowedSincPolyDataFilter::PrintSelf ( ostream &  os,
vtkIndent  indent 
)
overridevirtual

Methods invoked by print to print information about the object including superclasses.

Typically not called by the user (use Print() instead) but used in the hierarchical print process to combine the output of several classes.

Reimplemented from vtkPolyDataAlgorithm.

◆ New()

static vtkWindowedSincPolyDataFilter* vtkWindowedSincPolyDataFilter::New ( )
static

Construct object with number of iterations 20; passband .1; feature edge smoothing turned off; feature angle 45 degrees; edge angle 15 degrees; and boundary smoothing turned on.

Error scalars and vectors are not generated (by default). The convergence criterion is 0.0 of the bounding box diagonal.

◆ SetNumberOfIterations()

virtual void vtkWindowedSincPolyDataFilter::SetNumberOfIterations ( int  )
virtual

Specify the number of iterations (or degree of the polynomial approximating the windowed sinc function).

◆ GetNumberOfIterations()

virtual int vtkWindowedSincPolyDataFilter::GetNumberOfIterations ( )
virtual

◆ SetPassBand()

virtual void vtkWindowedSincPolyDataFilter::SetPassBand ( double  )
virtual

Set the passband value for the windowed sinc filter.

◆ GetPassBand()

virtual double vtkWindowedSincPolyDataFilter::GetPassBand ( )
virtual

◆ SetNormalizeCoordinates()

virtual void vtkWindowedSincPolyDataFilter::SetNormalizeCoordinates ( vtkTypeBool  )
virtual

Turn on/off coordinate normalization.

The positions can be translated and scaled such that they fit within a [-1, 1] prior to the smoothing computation. The default is off. The numerical stability of the solution can be improved by turning normalization on. If normalization is on, the coordinates will be rescaled to the original coordinate system after smoothing has completed.

◆ GetNormalizeCoordinates()

virtual vtkTypeBool vtkWindowedSincPolyDataFilter::GetNormalizeCoordinates ( )
virtual

◆ NormalizeCoordinatesOn()

virtual void vtkWindowedSincPolyDataFilter::NormalizeCoordinatesOn ( )
virtual

◆ NormalizeCoordinatesOff()

virtual void vtkWindowedSincPolyDataFilter::NormalizeCoordinatesOff ( )
virtual

◆ SetFeatureEdgeSmoothing()

virtual void vtkWindowedSincPolyDataFilter::SetFeatureEdgeSmoothing ( vtkTypeBool  )
virtual

Turn on/off smoothing along sharp interior edges.

◆ GetFeatureEdgeSmoothing()

virtual vtkTypeBool vtkWindowedSincPolyDataFilter::GetFeatureEdgeSmoothing ( )
virtual

◆ FeatureEdgeSmoothingOn()

virtual void vtkWindowedSincPolyDataFilter::FeatureEdgeSmoothingOn ( )
virtual

◆ FeatureEdgeSmoothingOff()

virtual void vtkWindowedSincPolyDataFilter::FeatureEdgeSmoothingOff ( )
virtual

◆ SetFeatureAngle()

virtual void vtkWindowedSincPolyDataFilter::SetFeatureAngle ( double  )
virtual

Specify the feature angle for sharp edge identification.

◆ GetFeatureAngle()

virtual double vtkWindowedSincPolyDataFilter::GetFeatureAngle ( )
virtual

◆ SetEdgeAngle()

virtual void vtkWindowedSincPolyDataFilter::SetEdgeAngle ( double  )
virtual

Specify the edge angle to control smoothing along edges (either interior or boundary).

◆ GetEdgeAngle()

virtual double vtkWindowedSincPolyDataFilter::GetEdgeAngle ( )
virtual

◆ SetBoundarySmoothing()

virtual void vtkWindowedSincPolyDataFilter::SetBoundarySmoothing ( vtkTypeBool  )
virtual

Turn on/off the smoothing of vertices on the boundary of the mesh.

◆ GetBoundarySmoothing()

virtual vtkTypeBool vtkWindowedSincPolyDataFilter::GetBoundarySmoothing ( )
virtual

◆ BoundarySmoothingOn()

virtual void vtkWindowedSincPolyDataFilter::BoundarySmoothingOn ( )
virtual

◆ BoundarySmoothingOff()

virtual void vtkWindowedSincPolyDataFilter::BoundarySmoothingOff ( )
virtual

◆ SetNonManifoldSmoothing()

virtual void vtkWindowedSincPolyDataFilter::SetNonManifoldSmoothing ( vtkTypeBool  )
virtual

Smooth non-manifold vertices.

◆ GetNonManifoldSmoothing()

virtual vtkTypeBool vtkWindowedSincPolyDataFilter::GetNonManifoldSmoothing ( )
virtual

◆ NonManifoldSmoothingOn()

virtual void vtkWindowedSincPolyDataFilter::NonManifoldSmoothingOn ( )
virtual

◆ NonManifoldSmoothingOff()

virtual void vtkWindowedSincPolyDataFilter::NonManifoldSmoothingOff ( )
virtual

◆ SetGenerateErrorScalars()

virtual void vtkWindowedSincPolyDataFilter::SetGenerateErrorScalars ( vtkTypeBool  )
virtual

Turn on/off the generation of scalar distance values.

◆ GetGenerateErrorScalars()

virtual vtkTypeBool vtkWindowedSincPolyDataFilter::GetGenerateErrorScalars ( )
virtual

◆ GenerateErrorScalarsOn()

virtual void vtkWindowedSincPolyDataFilter::GenerateErrorScalarsOn ( )
virtual

◆ GenerateErrorScalarsOff()

virtual void vtkWindowedSincPolyDataFilter::GenerateErrorScalarsOff ( )
virtual

◆ SetGenerateErrorVectors()

virtual void vtkWindowedSincPolyDataFilter::SetGenerateErrorVectors ( vtkTypeBool  )
virtual

Turn on/off the generation of error vectors.

◆ GetGenerateErrorVectors()

virtual vtkTypeBool vtkWindowedSincPolyDataFilter::GetGenerateErrorVectors ( )
virtual

◆ GenerateErrorVectorsOn()

virtual void vtkWindowedSincPolyDataFilter::GenerateErrorVectorsOn ( )
virtual

◆ GenerateErrorVectorsOff()

virtual void vtkWindowedSincPolyDataFilter::GenerateErrorVectorsOff ( )
virtual

◆ RequestData()

int vtkWindowedSincPolyDataFilter::RequestData ( vtkInformation request,
vtkInformationVector **  inputVector,
vtkInformationVector outputVector 
)
overrideprotectedvirtual

This is called by the superclass.

This is the method you should override.

Reimplemented from vtkPolyDataAlgorithm.

Member Data Documentation

◆ NumberOfIterations

int vtkWindowedSincPolyDataFilter::NumberOfIterations
protected

Definition at line 266 of file vtkWindowedSincPolyDataFilter.h.

◆ PassBand

double vtkWindowedSincPolyDataFilter::PassBand
protected

Definition at line 267 of file vtkWindowedSincPolyDataFilter.h.

◆ FeatureEdgeSmoothing

vtkTypeBool vtkWindowedSincPolyDataFilter::FeatureEdgeSmoothing
protected

Definition at line 268 of file vtkWindowedSincPolyDataFilter.h.

◆ FeatureAngle

double vtkWindowedSincPolyDataFilter::FeatureAngle
protected

Definition at line 269 of file vtkWindowedSincPolyDataFilter.h.

◆ EdgeAngle

double vtkWindowedSincPolyDataFilter::EdgeAngle
protected

Definition at line 270 of file vtkWindowedSincPolyDataFilter.h.

◆ BoundarySmoothing

vtkTypeBool vtkWindowedSincPolyDataFilter::BoundarySmoothing
protected

Definition at line 271 of file vtkWindowedSincPolyDataFilter.h.

◆ NonManifoldSmoothing

vtkTypeBool vtkWindowedSincPolyDataFilter::NonManifoldSmoothing
protected

Definition at line 272 of file vtkWindowedSincPolyDataFilter.h.

◆ GenerateErrorScalars

vtkTypeBool vtkWindowedSincPolyDataFilter::GenerateErrorScalars
protected

Definition at line 273 of file vtkWindowedSincPolyDataFilter.h.

◆ GenerateErrorVectors

vtkTypeBool vtkWindowedSincPolyDataFilter::GenerateErrorVectors
protected

Definition at line 274 of file vtkWindowedSincPolyDataFilter.h.

◆ NormalizeCoordinates

vtkTypeBool vtkWindowedSincPolyDataFilter::NormalizeCoordinates
protected

Definition at line 275 of file vtkWindowedSincPolyDataFilter.h.


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